diff options
author | Tony Lindgren <tony@atomide.com> | 2011-09-15 16:14:33 -0700 |
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committer | Tony Lindgren <tony@atomide.com> | 2011-09-15 16:14:33 -0700 |
commit | 23618f7faa8fdac93d4823d0372f4101d642b8b1 (patch) | |
tree | 9cdc7fb633ec7c0f24eee93a968bb799f45608e2 /arch/arm | |
parent | ceb1c532ba6220900e61ec7073a9234661efa450 (diff) | |
parent | ee7fbba63e334481049a7939b8071160824447d3 (diff) | |
download | op-kernel-dev-23618f7faa8fdac93d4823d0372f4101d642b8b1.zip op-kernel-dev-23618f7faa8fdac93d4823d0372f4101d642b8b1.tar.gz |
Merge branch 'for_3.2/voltage-cleanup' of git://gitorious.org/khilman/linux-omap-pm into voltage
Diffstat (limited to 'arch/arm')
34 files changed, 1599 insertions, 1271 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index cd45c04..8bd389d 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -90,8 +90,9 @@ obj-$(CONFIG_ARCH_OMAP4) += prcm.o cm2xxx_3xxx.o cminst44xx.o \ # OMAP voltage domains ifeq ($(CONFIG_PM),y) -voltagedomain-common := voltage.o -obj-$(CONFIG_ARCH_OMAP2) += $(voltagedomain-common) +voltagedomain-common := voltage.o vc.o vp.o +obj-$(CONFIG_ARCH_OMAP2) += $(voltagedomain-common) \ + voltagedomains2xxx_data.o obj-$(CONFIG_ARCH_OMAP3) += $(voltagedomain-common) \ voltagedomains3xxx_data.o obj-$(CONFIG_ARCH_OMAP4) += $(voltagedomain-common) \ diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index 1a13b79..15f91c4 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -38,6 +38,7 @@ #include "io.h" #include <plat/omap-pm.h> +#include "voltage.h" #include "powerdomain.h" #include "clockdomain.h" @@ -341,18 +342,22 @@ void __init omap2_init_common_infrastructure(void) u8 postsetup_state; if (cpu_is_omap242x()) { + omap2xxx_voltagedomains_init(); omap242x_powerdomains_init(); omap242x_clockdomains_init(); omap2420_hwmod_init(); } else if (cpu_is_omap243x()) { + omap2xxx_voltagedomains_init(); omap243x_powerdomains_init(); omap243x_clockdomains_init(); omap2430_hwmod_init(); } else if (cpu_is_omap34xx()) { + omap3xxx_voltagedomains_init(); omap3xxx_powerdomains_init(); omap3xxx_clockdomains_init(); omap3xxx_hwmod_init(); } else if (cpu_is_omap44xx()) { + omap44xx_voltagedomains_init(); omap44xx_powerdomains_init(); omap44xx_clockdomains_init(); omap44xx_hwmod_init(); diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c index ab35acb..e787731 100644 --- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c @@ -2542,7 +2542,7 @@ static struct omap_hwmod omap34xx_sr1_hwmod = { .name = "sr1_hwmod", .class = &omap34xx_smartreflex_hwmod_class, .main_clk = "sr1_fck", - .vdd_name = "mpu", + .vdd_name = "mpu_iva", .prcm = { .omap2 = { .prcm_reg_id = 1, @@ -2561,7 +2561,7 @@ static struct omap_hwmod omap36xx_sr1_hwmod = { .name = "sr1_hwmod", .class = &omap36xx_smartreflex_hwmod_class, .main_clk = "sr1_fck", - .vdd_name = "mpu", + .vdd_name = "mpu_iva", .prcm = { .omap2 = { .prcm_reg_id = 1, diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c index 07d6140..f515a1a 100644 --- a/arch/arm/mach-omap2/omap_twl.c +++ b/arch/arm/mach-omap2/omap_twl.c @@ -42,8 +42,11 @@ #define OMAP4_SRI2C_SLAVE_ADDR 0x12 #define OMAP4_VDD_MPU_SR_VOLT_REG 0x55 +#define OMAP4_VDD_MPU_SR_CMD_REG 0x56 #define OMAP4_VDD_IVA_SR_VOLT_REG 0x5B +#define OMAP4_VDD_IVA_SR_CMD_REG 0x5C #define OMAP4_VDD_CORE_SR_VOLT_REG 0x61 +#define OMAP4_VDD_CORE_SR_CMD_REG 0x62 #define OMAP4_VP_CONFIG_ERROROFFSET 0x00 #define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01 @@ -95,6 +98,8 @@ static unsigned long twl6030_vsel_to_uv(const u8 vsel) is_offset_valid = true; } + if (!vsel) + return 0; /* * There is no specific formula for voltage to vsel * conversion above 1.3V. There are special hardcoded @@ -106,9 +111,9 @@ static unsigned long twl6030_vsel_to_uv(const u8 vsel) return 1350000; if (smps_offset & 0x8) - return ((((vsel - 1) * 125) + 7000)) * 100; + return ((((vsel - 1) * 1266) + 70900)) * 10; else - return ((((vsel - 1) * 125) + 6000)) * 100; + return ((((vsel - 1) * 1266) + 60770)) * 10; } static u8 twl6030_uv_to_vsel(unsigned long uv) @@ -127,6 +132,8 @@ static u8 twl6030_uv_to_vsel(unsigned long uv) is_offset_valid = true; } + if (!uv) + return 0x00; /* * There is no specific formula for voltage to vsel * conversion above 1.3V. There are special hardcoded @@ -134,16 +141,21 @@ static u8 twl6030_uv_to_vsel(unsigned long uv) * hardcoding only for 1.35 V which is used for 1GH OPP for * OMAP4430. */ - if (uv == 1350000) + if (uv > twl6030_vsel_to_uv(0x39)) { + if (uv == 1350000) + return 0x3A; + pr_err("%s:OUT OF RANGE! non mapped vsel for %ld Vs max %ld\n", + __func__, uv, twl6030_vsel_to_uv(0x39)); return 0x3A; + } if (smps_offset & 0x8) - return DIV_ROUND_UP(uv - 700000, 12500) + 1; + return DIV_ROUND_UP(uv - 709000, 12660) + 1; else - return DIV_ROUND_UP(uv - 600000, 12500) + 1; + return DIV_ROUND_UP(uv - 607700, 12660) + 1; } -static struct omap_volt_pmic_info omap3_mpu_volt_info = { +static struct omap_voltdm_pmic omap3_mpu_pmic = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1200000, @@ -158,12 +170,13 @@ static struct omap_volt_pmic_info omap3_mpu_volt_info = { .vp_vddmax = OMAP3430_VP1_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR, - .pmic_reg = OMAP3_VDD_MPU_SR_CONTROL_REG, + .volt_reg_addr = OMAP3_VDD_MPU_SR_CONTROL_REG, + .i2c_high_speed = true, .vsel_to_uv = twl4030_vsel_to_uv, .uv_to_vsel = twl4030_uv_to_vsel, }; -static struct omap_volt_pmic_info omap3_core_volt_info = { +static struct omap_voltdm_pmic omap3_core_pmic = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1200000, @@ -178,18 +191,19 @@ static struct omap_volt_pmic_info omap3_core_volt_info = { .vp_vddmax = OMAP3430_VP2_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR, - .pmic_reg = OMAP3_VDD_CORE_SR_CONTROL_REG, + .volt_reg_addr = OMAP3_VDD_CORE_SR_CONTROL_REG, + .i2c_high_speed = true, .vsel_to_uv = twl4030_vsel_to_uv, .uv_to_vsel = twl4030_uv_to_vsel, }; -static struct omap_volt_pmic_info omap4_mpu_volt_info = { +static struct omap_voltdm_pmic omap4_mpu_pmic = { .slew_rate = 4000, - .step_size = 12500, - .on_volt = 1350000, - .onlp_volt = 1350000, - .ret_volt = 837500, - .off_volt = 600000, + .step_size = 12660, + .on_volt = 1375000, + .onlp_volt = 1375000, + .ret_volt = 830000, + .off_volt = 0, .volt_setup_time = 0, .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN, @@ -198,18 +212,20 @@ static struct omap_volt_pmic_info omap4_mpu_volt_info = { .vp_vddmax = OMAP4_VP_MPU_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR, - .pmic_reg = OMAP4_VDD_MPU_SR_VOLT_REG, + .volt_reg_addr = OMAP4_VDD_MPU_SR_VOLT_REG, + .cmd_reg_addr = OMAP4_VDD_MPU_SR_CMD_REG, + .i2c_high_speed = true, .vsel_to_uv = twl6030_vsel_to_uv, .uv_to_vsel = twl6030_uv_to_vsel, }; -static struct omap_volt_pmic_info omap4_iva_volt_info = { +static struct omap_voltdm_pmic omap4_iva_pmic = { .slew_rate = 4000, - .step_size = 12500, - .on_volt = 1100000, - .onlp_volt = 1100000, - .ret_volt = 837500, - .off_volt = 600000, + .step_size = 12660, + .on_volt = 1188000, + .onlp_volt = 1188000, + .ret_volt = 830000, + .off_volt = 0, .volt_setup_time = 0, .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN, @@ -218,18 +234,20 @@ static struct omap_volt_pmic_info omap4_iva_volt_info = { .vp_vddmax = OMAP4_VP_IVA_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR, - .pmic_reg = OMAP4_VDD_IVA_SR_VOLT_REG, + .volt_reg_addr = OMAP4_VDD_IVA_SR_VOLT_REG, + .cmd_reg_addr = OMAP4_VDD_IVA_SR_CMD_REG, + .i2c_high_speed = true, .vsel_to_uv = twl6030_vsel_to_uv, .uv_to_vsel = twl6030_uv_to_vsel, }; -static struct omap_volt_pmic_info omap4_core_volt_info = { +static struct omap_voltdm_pmic omap4_core_pmic = { .slew_rate = 4000, - .step_size = 12500, - .on_volt = 1100000, - .onlp_volt = 1100000, - .ret_volt = 837500, - .off_volt = 600000, + .step_size = 12660, + .on_volt = 1200000, + .onlp_volt = 1200000, + .ret_volt = 830000, + .off_volt = 0, .volt_setup_time = 0, .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN, @@ -238,7 +256,8 @@ static struct omap_volt_pmic_info omap4_core_volt_info = { .vp_vddmax = OMAP4_VP_CORE_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR, - .pmic_reg = OMAP4_VDD_CORE_SR_VOLT_REG, + .volt_reg_addr = OMAP4_VDD_CORE_SR_VOLT_REG, + .cmd_reg_addr = OMAP4_VDD_CORE_SR_CMD_REG, .vsel_to_uv = twl6030_vsel_to_uv, .uv_to_vsel = twl6030_uv_to_vsel, }; @@ -250,14 +269,14 @@ int __init omap4_twl_init(void) if (!cpu_is_omap44xx()) return -ENODEV; - voltdm = omap_voltage_domain_lookup("mpu"); - omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info); + voltdm = voltdm_lookup("mpu"); + omap_voltage_register_pmic(voltdm, &omap4_mpu_pmic); - voltdm = omap_voltage_domain_lookup("iva"); - omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info); + voltdm = voltdm_lookup("iva"); + omap_voltage_register_pmic(voltdm, &omap4_iva_pmic); - voltdm = omap_voltage_domain_lookup("core"); - omap_voltage_register_pmic(voltdm, &omap4_core_volt_info); + voltdm = voltdm_lookup("core"); + omap_voltage_register_pmic(voltdm, &omap4_core_pmic); return 0; } @@ -270,10 +289,10 @@ int __init omap3_twl_init(void) return -ENODEV; if (cpu_is_omap3630()) { - omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN; - omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX; - omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN; - omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX; + omap3_mpu_pmic.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN; + omap3_mpu_pmic.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX; + omap3_core_pmic.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN; + omap3_core_pmic.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX; } /* @@ -288,11 +307,11 @@ int __init omap3_twl_init(void) if (!twl_sr_enable_autoinit) omap3_twl_set_sr_bit(true); - voltdm = omap_voltage_domain_lookup("mpu"); - omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info); + voltdm = voltdm_lookup("mpu_iva"); + omap_voltage_register_pmic(voltdm, &omap3_mpu_pmic); - voltdm = omap_voltage_domain_lookup("core"); - omap_voltage_register_pmic(voltdm, &omap3_core_volt_info); + voltdm = voltdm_lookup("core"); + omap_voltage_register_pmic(voltdm, &omap3_core_pmic); return 0; } diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index 472bf22..d34fc52 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -181,7 +181,7 @@ static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name, goto exit; } - voltdm = omap_voltage_domain_lookup(vdd_name); + voltdm = voltdm_lookup(vdd_name); if (IS_ERR(voltdm)) { printk(KERN_ERR "%s: Unable to get vdd pointer for vdd_%s\n", __func__, vdd_name); @@ -212,7 +212,7 @@ static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name, goto exit; } - omap_voltage_scale_vdd(voltdm, bootup_volt); + voltdm_scale(voltdm, bootup_volt); return 0; exit: @@ -226,7 +226,7 @@ static void __init omap3_init_voltages(void) if (!cpu_is_omap34xx()) return; - omap2_set_init_voltage("mpu", "dpll1_ck", mpu_dev); + omap2_set_init_voltage("mpu_iva", "dpll1_ck", mpu_dev); omap2_set_init_voltage("core", "l3_ick", l3_dev); } diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 896cb4c..5164d58 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -77,6 +77,7 @@ static struct powerdomain *_pwrdm_lookup(const char *name) static int _pwrdm_register(struct powerdomain *pwrdm) { int i; + struct voltagedomain *voltdm; if (!pwrdm || !pwrdm->name) return -EINVAL; @@ -91,6 +92,16 @@ static int _pwrdm_register(struct powerdomain *pwrdm) if (_pwrdm_lookup(pwrdm->name)) return -EEXIST; + voltdm = voltdm_lookup(pwrdm->voltdm.name); + if (!voltdm) { + pr_err("powerdomain: %s: voltagedomain %s does not exist\n", + pwrdm->name, pwrdm->voltdm.name); + return -EINVAL; + } + pwrdm->voltdm.ptr = voltdm; + INIT_LIST_HEAD(&pwrdm->voltdm_node); + voltdm_add_pwrdm(voltdm, pwrdm); + list_add(&pwrdm->node, &pwrdm_list); /* Initialize the powerdomain's state counter */ @@ -427,6 +438,18 @@ int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, } /** + * pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in + * @pwrdm: struct powerdomain * + * + * Return a pointer to the struct voltageomain that the specified powerdomain + * @pwrdm exists in. + */ +struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm) +{ + return pwrdm->voltdm.ptr; +} + +/** * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain * @pwrdm: struct powerdomain * * diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h index 8febd84..42e6dd8 100644 --- a/arch/arm/mach-omap2/powerdomain.h +++ b/arch/arm/mach-omap2/powerdomain.h @@ -24,6 +24,8 @@ #include <plat/cpu.h> +#include "voltage.h" + /* Powerdomain basic power states */ #define PWRDM_POWER_OFF 0x0 #define PWRDM_POWER_RET 0x1 @@ -78,6 +80,7 @@ struct powerdomain; /** * struct powerdomain - OMAP powerdomain * @name: Powerdomain name + * @voltdm: voltagedomain containing this powerdomain * @prcm_offs: the address offset from CM_BASE/PRM_BASE * @prcm_partition: (OMAP4 only) the PRCM partition ID containing @prcm_offs * @pwrsts: Possible powerdomain power states @@ -88,6 +91,7 @@ struct powerdomain; * @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON * @pwrdm_clkdms: Clockdomains in this powerdomain * @node: list_head linking all powerdomains + * @voltdm_node: list_head linking all powerdomains in a voltagedomain * @state: * @state_counter: * @timer: @@ -97,6 +101,10 @@ struct powerdomain; */ struct powerdomain { const char *name; + union { + const char *name; + struct voltagedomain *ptr; + } voltdm; const s16 prcm_offs; const u8 pwrsts; const u8 pwrsts_logic_ret; @@ -107,6 +115,7 @@ struct powerdomain { const u8 prcm_partition; struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS]; struct list_head node; + struct list_head voltdm_node; int state; unsigned state_counter[PWRDM_MAX_PWRSTS]; unsigned ret_logic_off_counter; @@ -176,6 +185,7 @@ int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm); int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, int (*fn)(struct powerdomain *pwrdm, struct clockdomain *clkdm)); +struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm); int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm); diff --git a/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c b/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c index cf600e2..6a17e4c 100644 --- a/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c +++ b/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c @@ -1,7 +1,7 @@ /* * OMAP2 and OMAP3 powerdomain control * - * Copyright (C) 2009-2010 Texas Instruments, Inc. + * Copyright (C) 2009-2011 Texas Instruments, Inc. * Copyright (C) 2007-2009 Nokia Corporation * * Derived from mach-omap2/powerdomain.c written by Paul Walmsley diff --git a/arch/arm/mach-omap2/powerdomains2xxx_3xxx_data.c b/arch/arm/mach-omap2/powerdomains2xxx_3xxx_data.c index bf30483..d3a5399 100644 --- a/arch/arm/mach-omap2/powerdomains2xxx_3xxx_data.c +++ b/arch/arm/mach-omap2/powerdomains2xxx_3xxx_data.c @@ -54,10 +54,12 @@ struct powerdomain gfx_omap2_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; struct powerdomain wkup_omap2_pwrdm = { .name = "wkup_pwrdm", .prcm_offs = WKUP_MOD, .pwrsts = PWRSTS_ON, + .voltdm = { .name = "wakeup" }, }; diff --git a/arch/arm/mach-omap2/powerdomains2xxx_data.c b/arch/arm/mach-omap2/powerdomains2xxx_data.c index bb4394e..2385c1f 100644 --- a/arch/arm/mach-omap2/powerdomains2xxx_data.c +++ b/arch/arm/mach-omap2/powerdomains2xxx_data.c @@ -37,6 +37,7 @@ static struct powerdomain dsp_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, }, + .voltdm = { .name = "core" }, }; static struct powerdomain mpu_24xx_pwrdm = { @@ -51,6 +52,7 @@ static struct powerdomain mpu_24xx_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, }, + .voltdm = { .name = "core" }, }; static struct powerdomain core_24xx_pwrdm = { @@ -68,6 +70,7 @@ static struct powerdomain core_24xx_pwrdm = { [1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */ [2] = PWRSTS_OFF_RET_ON, /* MEM3ONSTATE */ }, + .voltdm = { .name = "core" }, }; @@ -89,6 +92,7 @@ static struct powerdomain mdm_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; /* diff --git a/arch/arm/mach-omap2/powerdomains3xxx_data.c b/arch/arm/mach-omap2/powerdomains3xxx_data.c index e4f3a7d..8ef26da 100644 --- a/arch/arm/mach-omap2/powerdomains3xxx_data.c +++ b/arch/arm/mach-omap2/powerdomains3xxx_data.c @@ -51,6 +51,7 @@ static struct powerdomain iva2_pwrdm = { [2] = PWRSTS_OFF_ON, [3] = PWRSTS_ON, }, + .voltdm = { .name = "mpu_iva" }, }; static struct powerdomain mpu_3xxx_pwrdm = { @@ -66,6 +67,7 @@ static struct powerdomain mpu_3xxx_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_OFF_ON, }, + .voltdm = { .name = "mpu_iva" }, }; /* @@ -92,6 +94,7 @@ static struct powerdomain core_3xxx_pre_es3_1_pwrdm = { [0] = PWRSTS_OFF_RET_ON, /* MEM1ONSTATE */ [1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */ }, + .voltdm = { .name = "core" }, }; static struct powerdomain core_3xxx_es3_1_pwrdm = { @@ -113,6 +116,7 @@ static struct powerdomain core_3xxx_es3_1_pwrdm = { [0] = PWRSTS_OFF_RET_ON, /* MEM1ONSTATE */ [1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */ }, + .voltdm = { .name = "core" }, }; static struct powerdomain dss_pwrdm = { @@ -127,6 +131,7 @@ static struct powerdomain dss_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; /* @@ -147,6 +152,7 @@ static struct powerdomain sgx_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; static struct powerdomain cam_pwrdm = { @@ -161,6 +167,7 @@ static struct powerdomain cam_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; static struct powerdomain per_pwrdm = { @@ -175,11 +182,13 @@ static struct powerdomain per_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; static struct powerdomain emu_pwrdm = { .name = "emu_pwrdm", .prcm_offs = OMAP3430_EMU_MOD, + .voltdm = { .name = "core" }, }; static struct powerdomain neon_pwrdm = { @@ -187,6 +196,7 @@ static struct powerdomain neon_pwrdm = { .prcm_offs = OMAP3430_NEON_MOD, .pwrsts = PWRSTS_OFF_RET_ON, .pwrsts_logic_ret = PWRSTS_RET, + .voltdm = { .name = "mpu_iva" }, }; static struct powerdomain usbhost_pwrdm = { @@ -208,31 +218,37 @@ static struct powerdomain usbhost_pwrdm = { .pwrsts_mem_on = { [0] = PWRSTS_ON, /* MEMONSTATE */ }, + .voltdm = { .name = "core" }, }; static struct powerdomain dpll1_pwrdm = { .name = "dpll1_pwrdm", .prcm_offs = MPU_MOD, + .voltdm = { .name = "mpu_iva" }, }; static struct powerdomain dpll2_pwrdm = { .name = "dpll2_pwrdm", .prcm_offs = OMAP3430_IVA2_MOD, + .voltdm = { .name = "mpu_iva" }, }; static struct powerdomain dpll3_pwrdm = { .name = "dpll3_pwrdm", .prcm_offs = PLL_MOD, + .voltdm = { .name = "core" }, }; static struct powerdomain dpll4_pwrdm = { .name = "dpll4_pwrdm", .prcm_offs = PLL_MOD, + .voltdm = { .name = "core" }, }; static struct powerdomain dpll5_pwrdm = { .name = "dpll5_pwrdm", .prcm_offs = PLL_MOD, + .voltdm = { .name = "core" }, }; /* As powerdomains are added or removed above, this list must also be changed */ diff --git a/arch/arm/mach-omap2/powerdomains44xx_data.c b/arch/arm/mach-omap2/powerdomains44xx_data.c index cbce0c9..704664c 100644 --- a/arch/arm/mach-omap2/powerdomains44xx_data.c +++ b/arch/arm/mach-omap2/powerdomains44xx_data.c @@ -33,6 +33,7 @@ /* core_44xx_pwrdm: CORE power domain */ static struct powerdomain core_44xx_pwrdm = { .name = "core_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_CORE_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_RET_ON, @@ -58,6 +59,7 @@ static struct powerdomain core_44xx_pwrdm = { /* gfx_44xx_pwrdm: 3D accelerator power domain */ static struct powerdomain gfx_44xx_pwrdm = { .name = "gfx_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_GFX_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_ON, @@ -74,6 +76,7 @@ static struct powerdomain gfx_44xx_pwrdm = { /* abe_44xx_pwrdm: Audio back end power domain */ static struct powerdomain abe_44xx_pwrdm = { .name = "abe_pwrdm", + .voltdm = { .name = "iva" }, .prcm_offs = OMAP4430_PRM_ABE_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_RET_ON, @@ -93,6 +96,7 @@ static struct powerdomain abe_44xx_pwrdm = { /* dss_44xx_pwrdm: Display subsystem power domain */ static struct powerdomain dss_44xx_pwrdm = { .name = "dss_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_DSS_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_RET_ON, @@ -110,6 +114,7 @@ static struct powerdomain dss_44xx_pwrdm = { /* tesla_44xx_pwrdm: Tesla processor power domain */ static struct powerdomain tesla_44xx_pwrdm = { .name = "tesla_pwrdm", + .voltdm = { .name = "iva" }, .prcm_offs = OMAP4430_PRM_TESLA_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_RET_ON, @@ -131,6 +136,7 @@ static struct powerdomain tesla_44xx_pwrdm = { /* wkup_44xx_pwrdm: Wake-up power domain */ static struct powerdomain wkup_44xx_pwrdm = { .name = "wkup_pwrdm", + .voltdm = { .name = "wakeup" }, .prcm_offs = OMAP4430_PRM_WKUP_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_ON, @@ -146,6 +152,7 @@ static struct powerdomain wkup_44xx_pwrdm = { /* cpu0_44xx_pwrdm: MPU0 processor and Neon coprocessor power domain */ static struct powerdomain cpu0_44xx_pwrdm = { .name = "cpu0_pwrdm", + .voltdm = { .name = "mpu" }, .prcm_offs = OMAP4430_PRCM_MPU_CPU0_INST, .prcm_partition = OMAP4430_PRCM_MPU_PARTITION, .pwrsts = PWRSTS_OFF_RET_ON, @@ -162,6 +169,7 @@ static struct powerdomain cpu0_44xx_pwrdm = { /* cpu1_44xx_pwrdm: MPU1 processor and Neon coprocessor power domain */ static struct powerdomain cpu1_44xx_pwrdm = { .name = "cpu1_pwrdm", + .voltdm = { .name = "mpu" }, .prcm_offs = OMAP4430_PRCM_MPU_CPU1_INST, .prcm_partition = OMAP4430_PRCM_MPU_PARTITION, .pwrsts = PWRSTS_OFF_RET_ON, @@ -178,6 +186,7 @@ static struct powerdomain cpu1_44xx_pwrdm = { /* emu_44xx_pwrdm: Emulation power domain */ static struct powerdomain emu_44xx_pwrdm = { .name = "emu_pwrdm", + .voltdm = { .name = "wakeup" }, .prcm_offs = OMAP4430_PRM_EMU_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_ON, @@ -193,6 +202,7 @@ static struct powerdomain emu_44xx_pwrdm = { /* mpu_44xx_pwrdm: Modena processor and the Neon coprocessor power domain */ static struct powerdomain mpu_44xx_pwrdm = { .name = "mpu_pwrdm", + .voltdm = { .name = "mpu" }, .prcm_offs = OMAP4430_PRM_MPU_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_RET_ON, @@ -213,6 +223,7 @@ static struct powerdomain mpu_44xx_pwrdm = { /* ivahd_44xx_pwrdm: IVA-HD power domain */ static struct powerdomain ivahd_44xx_pwrdm = { .name = "ivahd_pwrdm", + .voltdm = { .name = "iva" }, .prcm_offs = OMAP4430_PRM_IVAHD_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_RET_ON, @@ -236,6 +247,7 @@ static struct powerdomain ivahd_44xx_pwrdm = { /* cam_44xx_pwrdm: Camera subsystem power domain */ static struct powerdomain cam_44xx_pwrdm = { .name = "cam_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_CAM_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_ON, @@ -252,6 +264,7 @@ static struct powerdomain cam_44xx_pwrdm = { /* l3init_44xx_pwrdm: L3 initators pheripherals power domain */ static struct powerdomain l3init_44xx_pwrdm = { .name = "l3init_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_L3INIT_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_RET_ON, @@ -269,6 +282,7 @@ static struct powerdomain l3init_44xx_pwrdm = { /* l4per_44xx_pwrdm: Target peripherals power domain */ static struct powerdomain l4per_44xx_pwrdm = { .name = "l4per_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_L4PER_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_RET_ON, @@ -291,6 +305,7 @@ static struct powerdomain l4per_44xx_pwrdm = { */ static struct powerdomain always_on_core_44xx_pwrdm = { .name = "always_on_core_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_ALWAYS_ON_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_ON, @@ -299,6 +314,7 @@ static struct powerdomain always_on_core_44xx_pwrdm = { /* cefuse_44xx_pwrdm: Customer efuse controller power domain */ static struct powerdomain cefuse_44xx_pwrdm = { .name = "cefuse_pwrdm", + .voltdm = { .name = "core" }, .prcm_offs = OMAP4430_PRM_CEFUSE_INST, .prcm_partition = OMAP4430_PRM_PARTITION, .pwrsts = PWRSTS_OFF_ON, diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.c b/arch/arm/mach-omap2/prm2xxx_3xxx.c index 051213f..f02d87f 100644 --- a/arch/arm/mach-omap2/prm2xxx_3xxx.c +++ b/arch/arm/mach-omap2/prm2xxx_3xxx.c @@ -20,6 +20,8 @@ #include <plat/cpu.h> #include <plat/prcm.h> +#include "vp.h" + #include "prm2xxx_3xxx.h" #include "cm2xxx_3xxx.h" #include "prm-regbits-24xx.h" @@ -156,3 +158,57 @@ int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift) return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0; } + +/* PRM VP */ + +/* + * struct omap3_vp - OMAP3 VP register access description. + * @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg + */ +struct omap3_vp { + u32 tranxdone_status; +}; + +static struct omap3_vp omap3_vp[] = { + [OMAP3_VP_VDD_MPU_ID] = { + .tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK, + }, + [OMAP3_VP_VDD_CORE_ID] = { + .tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK, + }, +}; + +#define MAX_VP_ID ARRAY_SIZE(omap3_vp); + +u32 omap3_prm_vp_check_txdone(u8 vp_id) +{ + struct omap3_vp *vp = &omap3_vp[vp_id]; + u32 irqstatus; + + irqstatus = omap2_prm_read_mod_reg(OCP_MOD, + OMAP3_PRM_IRQSTATUS_MPU_OFFSET); + return irqstatus & vp->tranxdone_status; +} + +void omap3_prm_vp_clear_txdone(u8 vp_id) +{ + struct omap3_vp *vp = &omap3_vp[vp_id]; + + omap2_prm_write_mod_reg(vp->tranxdone_status, + OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET); +} + +u32 omap3_prm_vcvp_read(u8 offset) +{ + return omap2_prm_read_mod_reg(OMAP3430_GR_MOD, offset); +} + +void omap3_prm_vcvp_write(u32 val, u8 offset) +{ + omap2_prm_write_mod_reg(val, OMAP3430_GR_MOD, offset); +} + +u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset) +{ + return omap2_prm_rmw_mod_reg_bits(mask, bits, OMAP3430_GR_MOD, offset); +} diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.h b/arch/arm/mach-omap2/prm2xxx_3xxx.h index a1fc62a..cef533d 100644 --- a/arch/arm/mach-omap2/prm2xxx_3xxx.h +++ b/arch/arm/mach-omap2/prm2xxx_3xxx.h @@ -303,7 +303,19 @@ extern int omap2_prm_is_hardreset_asserted(s16 prm_mod, u8 shift); extern int omap2_prm_assert_hardreset(s16 prm_mod, u8 shift); extern int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift); +/* OMAP3-specific VP functions */ +u32 omap3_prm_vp_check_txdone(u8 vp_id); +void omap3_prm_vp_clear_txdone(u8 vp_id); + +/* + * OMAP3 access functions for voltage controller (VC) and + * voltage proccessor (VP) in the PRM. + */ +extern u32 omap3_prm_vcvp_read(u8 offset); +extern void omap3_prm_vcvp_write(u32 val, u8 offset); +extern u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset); #endif /* CONFIG_ARCH_OMAP4 */ + #endif /* diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c index 0016555..495a31a 100644 --- a/arch/arm/mach-omap2/prm44xx.c +++ b/arch/arm/mach-omap2/prm44xx.c @@ -21,8 +21,11 @@ #include <plat/cpu.h> #include <plat/prcm.h> +#include "vp.h" #include "prm44xx.h" #include "prm-regbits-44xx.h" +#include "prcm44xx.h" +#include "prminst44xx.h" /* PRM low-level functions */ @@ -50,3 +53,71 @@ u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg) return v; } + +/* PRM VP */ + +/* + * struct omap4_vp - OMAP4 VP register access description. + * @irqstatus_mpu: offset to IRQSTATUS_MPU register for VP + * @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg + */ +struct omap4_vp { + u32 irqstatus_mpu; + u32 tranxdone_status; +}; + +static struct omap4_vp omap4_vp[] = { + [OMAP4_VP_VDD_MPU_ID] = { + .irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET, + .tranxdone_status = OMAP4430_VP_MPU_TRANXDONE_ST_MASK, + }, + [OMAP4_VP_VDD_IVA_ID] = { + .irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_OFFSET, + .tranxdone_status = OMAP4430_VP_IVA_TRANXDONE_ST_MASK, + }, + [OMAP4_VP_VDD_CORE_ID] = { + .irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_OFFSET, + .tranxdone_status = OMAP4430_VP_CORE_TRANXDONE_ST_MASK, + }, +}; + +u32 omap4_prm_vp_check_txdone(u8 vp_id) +{ + struct omap4_vp *vp = &omap4_vp[vp_id]; + u32 irqstatus; + + irqstatus = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, + OMAP4430_PRM_OCP_SOCKET_INST, + vp->irqstatus_mpu); + return irqstatus & vp->tranxdone_status; +} + +void omap4_prm_vp_clear_txdone(u8 vp_id) +{ + struct omap4_vp *vp = &omap4_vp[vp_id]; + + omap4_prminst_write_inst_reg(vp->tranxdone_status, + OMAP4430_PRM_PARTITION, + OMAP4430_PRM_OCP_SOCKET_INST, + vp->irqstatus_mpu); +}; + +u32 omap4_prm_vcvp_read(u8 offset) +{ + return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, + OMAP4430_PRM_DEVICE_INST, offset); +} + +void omap4_prm_vcvp_write(u32 val, u8 offset) +{ + omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION, + OMAP4430_PRM_DEVICE_INST, offset); +} + +u32 omap4_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset) +{ + return omap4_prminst_rmw_inst_reg_bits(mask, bits, + OMAP4430_PRM_PARTITION, + OMAP4430_PRM_DEVICE_INST, + offset); +} diff --git a/arch/arm/mach-omap2/prm44xx.h b/arch/arm/mach-omap2/prm44xx.h index 7dfa379..3d66ccd 100644 --- a/arch/arm/mach-omap2/prm44xx.h +++ b/arch/arm/mach-omap2/prm44xx.h @@ -751,6 +751,18 @@ extern u32 omap4_prm_read_inst_reg(s16 inst, u16 idx); extern void omap4_prm_write_inst_reg(u32 val, s16 inst, u16 idx); extern u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx); +/* OMAP4-specific VP functions */ +u32 omap4_prm_vp_check_txdone(u8 vp_id); +void omap4_prm_vp_clear_txdone(u8 vp_id); + +/* + * OMAP4 access functions for voltage controller (VC) and + * voltage proccessor (VP) in the PRM. + */ +extern u32 omap4_prm_vcvp_read(u8 offset); +extern void omap4_prm_vcvp_write(u32 val, u8 offset); +extern u32 omap4_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset); + # endif #endif diff --git a/arch/arm/mach-omap2/smartreflex-class3.c b/arch/arm/mach-omap2/smartreflex-class3.c index f438cf4..53d9d0a 100644 --- a/arch/arm/mach-omap2/smartreflex-class3.c +++ b/arch/arm/mach-omap2/smartreflex-class3.c @@ -15,7 +15,7 @@ static int sr_class3_enable(struct voltagedomain *voltdm) { - unsigned long volt = omap_voltage_get_nom_volt(voltdm); + unsigned long volt = voltdm_get_voltage(voltdm); if (!volt) { pr_warning("%s: Curr voltage unknown. Cannot enable sr_%s\n", @@ -32,7 +32,7 @@ static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset) omap_vp_disable(voltdm); sr_disable(voltdm); if (is_volt_reset) - omap_voltage_reset(voltdm); + voltdm_reset(voltdm); return 0; } diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c index 34c01a7..bb606c9 100644 --- a/arch/arm/mach-omap2/smartreflex.c +++ b/arch/arm/mach-omap2/smartreflex.c @@ -62,6 +62,7 @@ static LIST_HEAD(sr_list); static struct omap_sr_class_data *sr_class; static struct omap_sr_pmic_data *sr_pmic_data; +static struct dentry *sr_dbg_dir; static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value) { @@ -826,9 +827,10 @@ static int __init omap_sr_probe(struct platform_device *pdev) struct omap_sr *sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL); struct omap_sr_data *pdata = pdev->dev.platform_data; struct resource *mem, *irq; - struct dentry *vdd_dbg_dir, *nvalue_dir; + struct dentry *nvalue_dir; struct omap_volt_data *volt_data; int i, ret = 0; + char *name; if (!sr_info) { dev_err(&pdev->dev, "%s: unable to allocate sr_info\n", @@ -899,18 +901,25 @@ static int __init omap_sr_probe(struct platform_device *pdev) } dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__); + if (!sr_dbg_dir) { + sr_dbg_dir = debugfs_create_dir("smartreflex", NULL); + if (!sr_dbg_dir) { + ret = PTR_ERR(sr_dbg_dir); + pr_err("%s:sr debugfs dir creation failed(%d)\n", + __func__, ret); + goto err_iounmap; + } + } - /* - * If the voltage domain debugfs directory is not created, do - * not try to create rest of the debugfs entries. - */ - vdd_dbg_dir = omap_voltage_get_dbgdir(sr_info->voltdm); - if (!vdd_dbg_dir) { - ret = -EINVAL; + name = kasprintf(GFP_KERNEL, "sr_%s", sr_info->voltdm->name); + if (!name) { + dev_err(&pdev->dev, "%s: Unable to alloc debugfs name\n", + __func__); + ret = -ENOMEM; goto err_iounmap; } - - sr_info->dbg_dir = debugfs_create_dir("smartreflex", vdd_dbg_dir); + sr_info->dbg_dir = debugfs_create_dir(name, sr_dbg_dir); + kfree(name); if (IS_ERR(sr_info->dbg_dir)) { dev_err(&pdev->dev, "%s: Unable to create debugfs directory\n", __func__); diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c index 10d3c5e..2782d3f 100644 --- a/arch/arm/mach-omap2/sr_device.c +++ b/arch/arm/mach-omap2/sr_device.c @@ -102,7 +102,7 @@ static int sr_dev_init(struct omap_hwmod *oh, void *user) sr_data->senn_mod = 0x1; sr_data->senp_mod = 0x1; - sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name); + sr_data->voltdm = voltdm_lookup(oh->vdd_name); if (IS_ERR(sr_data->voltdm)) { pr_err("%s: Unable to get voltage domain pointer for VDD %s\n", __func__, oh->vdd_name); diff --git a/arch/arm/mach-omap2/vc.c b/arch/arm/mach-omap2/vc.c new file mode 100644 index 0000000..031d116 --- /dev/null +++ b/arch/arm/mach-omap2/vc.c @@ -0,0 +1,367 @@ +/* + * OMAP Voltage Controller (VC) interface + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/init.h> + +#include <plat/cpu.h> + +#include "voltage.h" +#include "vc.h" +#include "prm-regbits-34xx.h" +#include "prm-regbits-44xx.h" +#include "prm44xx.h" + +/** + * struct omap_vc_channel_cfg - describe the cfg_channel bitfield + * @sa: bit for slave address + * @rav: bit for voltage configuration register + * @rac: bit for command configuration register + * @racen: enable bit for RAC + * @cmd: bit for command value set selection + * + * Channel configuration bits, common for OMAP3+ + * OMAP3 register: PRM_VC_CH_CONF + * OMAP4 register: PRM_VC_CFG_CHANNEL + * OMAP5 register: PRM_VC_SMPS_<voltdm>_CONFIG + */ +struct omap_vc_channel_cfg { + u8 sa; + u8 rav; + u8 rac; + u8 racen; + u8 cmd; +}; + +static struct omap_vc_channel_cfg vc_default_channel_cfg = { + .sa = BIT(0), + .rav = BIT(1), + .rac = BIT(2), + .racen = BIT(3), + .cmd = BIT(4), +}; + +/* + * On OMAP3+, all VC channels have the above default bitfield + * configuration, except the OMAP4 MPU channel. This appears + * to be a freak accident as every other VC channel has the + * default configuration, thus creating a mutant channel config. + */ +static struct omap_vc_channel_cfg vc_mutant_channel_cfg = { + .sa = BIT(0), + .rav = BIT(2), + .rac = BIT(3), + .racen = BIT(4), + .cmd = BIT(1), +}; + +static struct omap_vc_channel_cfg *vc_cfg_bits; +#define CFG_CHANNEL_MASK 0x1f + +/** + * omap_vc_config_channel - configure VC channel to PMIC mappings + * @voltdm: pointer to voltagdomain defining the desired VC channel + * + * Configures the VC channel to PMIC mappings for the following + * PMIC settings + * - i2c slave address (SA) + * - voltage configuration address (RAV) + * - command configuration address (RAC) and enable bit (RACEN) + * - command values for ON, ONLP, RET and OFF (CMD) + * + * This function currently only allows flexible configuration of the + * non-default channel. Starting with OMAP4, there are more than 2 + * channels, with one defined as the default (on OMAP4, it's MPU.) + * Only the non-default channel can be configured. + */ +static int omap_vc_config_channel(struct voltagedomain *voltdm) +{ + struct omap_vc_channel *vc = voltdm->vc; + + /* + * For default channel, the only configurable bit is RACEN. + * All others must stay at zero (see function comment above.) + */ + if (vc->flags & OMAP_VC_CHANNEL_DEFAULT) + vc->cfg_channel &= vc_cfg_bits->racen; + + voltdm->rmw(CFG_CHANNEL_MASK << vc->cfg_channel_sa_shift, + vc->cfg_channel << vc->cfg_channel_sa_shift, + vc->cfg_channel_reg); + + return 0; +} + +/* Voltage scale and accessory APIs */ +int omap_vc_pre_scale(struct voltagedomain *voltdm, + unsigned long target_volt, + u8 *target_vsel, u8 *current_vsel) +{ + struct omap_vc_channel *vc = voltdm->vc; + u32 vc_cmdval; + + /* Check if sufficient pmic info is available for this vdd */ + if (!voltdm->pmic) { + pr_err("%s: Insufficient pmic info to scale the vdd_%s\n", + __func__, voltdm->name); + return -EINVAL; + } + + if (!voltdm->pmic->uv_to_vsel) { + pr_err("%s: PMIC function to convert voltage in uV to" + "vsel not registered. Hence unable to scale voltage" + "for vdd_%s\n", __func__, voltdm->name); + return -ENODATA; + } + + if (!voltdm->read || !voltdm->write) { + pr_err("%s: No read/write API for accessing vdd_%s regs\n", + __func__, voltdm->name); + return -EINVAL; + } + + *target_vsel = voltdm->pmic->uv_to_vsel(target_volt); + *current_vsel = voltdm->pmic->uv_to_vsel(voltdm->nominal_volt); + + /* Setting the ON voltage to the new target voltage */ + vc_cmdval = voltdm->read(vc->cmdval_reg); + vc_cmdval &= ~vc->common->cmd_on_mask; + vc_cmdval |= (*target_vsel << vc->common->cmd_on_shift); + voltdm->write(vc_cmdval, vc->cmdval_reg); + + omap_vp_update_errorgain(voltdm, target_volt); + + return 0; +} + +void omap_vc_post_scale(struct voltagedomain *voltdm, + unsigned long target_volt, + u8 target_vsel, u8 current_vsel) +{ + u32 smps_steps = 0, smps_delay = 0; + + smps_steps = abs(target_vsel - current_vsel); + /* SMPS slew rate / step size. 2us added as buffer. */ + smps_delay = ((smps_steps * voltdm->pmic->step_size) / + voltdm->pmic->slew_rate) + 2; + udelay(smps_delay); +} + +/* vc_bypass_scale - VC bypass method of voltage scaling */ +int omap_vc_bypass_scale(struct voltagedomain *voltdm, + unsigned long target_volt) +{ + struct omap_vc_channel *vc = voltdm->vc; + u32 loop_cnt = 0, retries_cnt = 0; + u32 vc_valid, vc_bypass_val_reg, vc_bypass_value; + u8 target_vsel, current_vsel; + int ret; + + ret = omap_vc_pre_scale(voltdm, target_volt, &target_vsel, ¤t_vsel); + if (ret) + return ret; + + vc_valid = vc->common->valid; + vc_bypass_val_reg = vc->common->bypass_val_reg; + vc_bypass_value = (target_vsel << vc->common->data_shift) | + (vc->volt_reg_addr << vc->common->regaddr_shift) | + (vc->i2c_slave_addr << vc->common->slaveaddr_shift); + + voltdm->write(vc_bypass_value, vc_bypass_val_reg); + voltdm->write(vc_bypass_value | vc_valid, vc_bypass_val_reg); + + vc_bypass_value = voltdm->read(vc_bypass_val_reg); + /* + * Loop till the bypass command is acknowledged from the SMPS. + * NOTE: This is legacy code. The loop count and retry count needs + * to be revisited. + */ + while (!(vc_bypass_value & vc_valid)) { + loop_cnt++; + + if (retries_cnt > 10) { + pr_warning("%s: Retry count exceeded\n", __func__); + return -ETIMEDOUT; + } + + if (loop_cnt > 50) { + retries_cnt++; + loop_cnt = 0; + udelay(10); + } + vc_bypass_value = voltdm->read(vc_bypass_val_reg); + } + + omap_vc_post_scale(voltdm, target_volt, target_vsel, current_vsel); + return 0; +} + +static void __init omap3_vfsm_init(struct voltagedomain *voltdm) +{ + /* + * Voltage Manager FSM parameters init + * XXX This data should be passed in from the board file + */ + voltdm->write(OMAP3_CLKSETUP, OMAP3_PRM_CLKSETUP_OFFSET); + voltdm->write(OMAP3_VOLTOFFSET, OMAP3_PRM_VOLTOFFSET_OFFSET); + voltdm->write(OMAP3_VOLTSETUP2, OMAP3_PRM_VOLTSETUP2_OFFSET); +} + +static void __init omap3_vc_init_channel(struct voltagedomain *voltdm) +{ + static bool is_initialized; + + if (is_initialized) + return; + + omap3_vfsm_init(voltdm); + + is_initialized = true; +} + + +/* OMAP4 specific voltage init functions */ +static void __init omap4_vc_init_channel(struct voltagedomain *voltdm) +{ + static bool is_initialized; + u32 vc_val; + + if (is_initialized) + return; + + /* XXX These are magic numbers and do not belong! */ + vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT); + voltdm->write(vc_val, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET); + + is_initialized = true; +} + +/** + * omap_vc_i2c_init - initialize I2C interface to PMIC + * @voltdm: voltage domain containing VC data + * + * Use PMIC supplied seetings for I2C high-speed mode and + * master code (if set) and program the VC I2C configuration + * register. + * + * The VC I2C configuration is common to all VC channels, + * so this function only configures I2C for the first VC + * channel registers. All other VC channels will use the + * same configuration. + */ +static void __init omap_vc_i2c_init(struct voltagedomain *voltdm) +{ + struct omap_vc_channel *vc = voltdm->vc; + static bool initialized; + static bool i2c_high_speed; + u8 mcode; + + if (initialized) { + if (voltdm->pmic->i2c_high_speed != i2c_high_speed) + pr_warn("%s: I2C config for all channels must match.", + __func__); + return; + } + + i2c_high_speed = voltdm->pmic->i2c_high_speed; + if (i2c_high_speed) + voltdm->rmw(vc->common->i2c_cfg_hsen_mask, + vc->common->i2c_cfg_hsen_mask, + vc->common->i2c_cfg_reg); + + mcode = voltdm->pmic->i2c_mcode; + if (mcode) + voltdm->rmw(vc->common->i2c_mcode_mask, + mcode << __ffs(vc->common->i2c_mcode_mask), + vc->common->i2c_cfg_reg); + + initialized = true; +} + +void __init omap_vc_init_channel(struct voltagedomain *voltdm) +{ + struct omap_vc_channel *vc = voltdm->vc; + u8 on_vsel, onlp_vsel, ret_vsel, off_vsel; + u32 val; + + if (!voltdm->pmic || !voltdm->pmic->uv_to_vsel) { + pr_err("%s: PMIC info requried to configure vc for" + "vdd_%s not populated.Hence cannot initialize vc\n", + __func__, voltdm->name); + return; + } + + if (!voltdm->read || !voltdm->write) { + pr_err("%s: No read/write API for accessing vdd_%s regs\n", + __func__, voltdm->name); + return; + } + + vc->cfg_channel = 0; + if (vc->flags & OMAP_VC_CHANNEL_CFG_MUTANT) + vc_cfg_bits = &vc_mutant_channel_cfg; + else + vc_cfg_bits = &vc_default_channel_cfg; + + /* get PMIC/board specific settings */ + vc->i2c_slave_addr = voltdm->pmic->i2c_slave_addr; + vc->volt_reg_addr = voltdm->pmic->volt_reg_addr; + vc->cmd_reg_addr = voltdm->pmic->cmd_reg_addr; + vc->setup_time = voltdm->pmic->volt_setup_time; + + /* Configure the i2c slave address for this VC */ + voltdm->rmw(vc->smps_sa_mask, + vc->i2c_slave_addr << __ffs(vc->smps_sa_mask), + vc->smps_sa_reg); + vc->cfg_channel |= vc_cfg_bits->sa; + + /* + * Configure the PMIC register addresses. + */ + voltdm->rmw(vc->smps_volra_mask, + vc->volt_reg_addr << __ffs(vc->smps_volra_mask), + vc->smps_volra_reg); + vc->cfg_channel |= vc_cfg_bits->rav; + + if (vc->cmd_reg_addr) { + voltdm->rmw(vc->smps_cmdra_mask, + vc->cmd_reg_addr << __ffs(vc->smps_cmdra_mask), + vc->smps_cmdra_reg); + vc->cfg_channel |= vc_cfg_bits->rac | vc_cfg_bits->racen; + } + + /* Set up the on, inactive, retention and off voltage */ + on_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->on_volt); + onlp_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->onlp_volt); + ret_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->ret_volt); + off_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->off_volt); + val = ((on_vsel << vc->common->cmd_on_shift) | + (onlp_vsel << vc->common->cmd_onlp_shift) | + (ret_vsel << vc->common->cmd_ret_shift) | + (off_vsel << vc->common->cmd_off_shift)); + voltdm->write(val, vc->cmdval_reg); + vc->cfg_channel |= vc_cfg_bits->cmd; + + /* Channel configuration */ + omap_vc_config_channel(voltdm); + + /* Configure the setup times */ + voltdm->rmw(voltdm->vfsm->voltsetup_mask, + vc->setup_time << __ffs(voltdm->vfsm->voltsetup_mask), + voltdm->vfsm->voltsetup_reg); + + omap_vc_i2c_init(voltdm); + + if (cpu_is_omap34xx()) + omap3_vc_init_channel(voltdm); + else if (cpu_is_omap44xx()) + omap4_vc_init_channel(voltdm); +} + diff --git a/arch/arm/mach-omap2/vc.h b/arch/arm/mach-omap2/vc.h index e776777..478bf6b4 100644 --- a/arch/arm/mach-omap2/vc.h +++ b/arch/arm/mach-omap2/vc.h @@ -19,12 +19,12 @@ #include <linux/kernel.h> +struct voltagedomain; + /** - * struct omap_vc_common_data - per-VC register/bitfield data + * struct omap_vc_common - per-VC register/bitfield data * @cmd_on_mask: ON bitmask in PRM_VC_CMD_VAL* register * @valid: VALID bitmask in PRM_VC_BYPASS_VAL register - * @smps_sa_reg: Offset of PRM_VC_SMPS_SA reg from PRM start - * @smps_volra_reg: Offset of PRM_VC_SMPS_VOL_RA reg from PRM start * @bypass_val_reg: Offset of PRM_VC_BYPASS_VAL reg from PRM start * @data_shift: DATA field shift in PRM_VC_BYPASS_VAL register * @slaveaddr_shift: SLAVEADDR field shift in PRM_VC_BYPASS_VAL register @@ -33,15 +33,16 @@ * @cmd_onlp_shift: ONLP field shift in PRM_VC_CMD_VAL_* register * @cmd_ret_shift: RET field shift in PRM_VC_CMD_VAL_* register * @cmd_off_shift: OFF field shift in PRM_VC_CMD_VAL_* register + * @i2c_cfg_reg: I2C configuration register offset + * @i2c_cfg_hsen_mask: high-speed mode bit field mask in I2C config register + * @i2c_mcode_mask: MCODE field mask for I2C config register * * XXX One of cmd_on_mask and cmd_on_shift are not needed * XXX VALID should probably be a shift, not a mask */ -struct omap_vc_common_data { +struct omap_vc_common { u32 cmd_on_mask; u32 valid; - u8 smps_sa_reg; - u8 smps_volra_reg; u8 bypass_val_reg; u8 data_shift; u8 slaveaddr_shift; @@ -50,34 +51,75 @@ struct omap_vc_common_data { u8 cmd_onlp_shift; u8 cmd_ret_shift; u8 cmd_off_shift; + u8 i2c_cfg_reg; + u8 i2c_cfg_hsen_mask; + u8 i2c_mcode_mask; }; +/* omap_vc_channel.flags values */ +#define OMAP_VC_CHANNEL_DEFAULT BIT(0) +#define OMAP_VC_CHANNEL_CFG_MUTANT BIT(1) + /** - * struct omap_vc_instance_data - VC per-instance data - * @vc_common: pointer to VC common data for this platform - * @smps_sa_mask: SA* bitmask in the PRM_VC_SMPS_SA register - * @smps_volra_mask: VOLRA* bitmask in the PRM_VC_VOL_RA register - * @smps_sa_shift: SA* field shift in the PRM_VC_SMPS_SA register - * @smps_volra_shift: VOLRA* field shift in the PRM_VC_VOL_RA register + * struct omap_vc_channel - VC per-instance data + * @i2c_slave_addr: I2C slave address of PMIC for this VC channel + * @volt_reg_addr: voltage configuration register address + * @cmd_reg_addr: command configuration register address + * @setup_time: setup time (in sys_clk cycles) of regulator for this channel + * @cfg_channel: current value of VC channel configuration register + * @i2c_high_speed: whether or not to use I2C high-speed mode * - * XXX It is not necessary to have both a *_mask and a *_shift - - * remove one + * @common: pointer to VC common data for this platform + * @smps_sa_mask: i2c slave address bitmask in the PRM_VC_SMPS_SA register + * @smps_volra_mask: VOLRA* bitmask in the PRM_VC_VOL_RA register + * @smps_cmdra_mask: CMDRA* bitmask in the PRM_VC_CMD_RA register + * @cmdval_reg: register for on/ret/off voltage level values for this channel + * @smps_sa_reg: Offset of PRM_VC_SMPS_SA reg from PRM start + * @smps_volra_reg: Offset of PRM_VC_SMPS_VOL_RA reg from PRM start + * @smps_cmdra_reg: Offset of PRM_VC_SMPS_CMD_RA reg from PRM start + * @cfg_channel_reg: VC channel configuration register + * @cfg_channel_sa_shift: bit shift for slave address cfg_channel register + * @flags: VC channel-specific flags (optional) */ -struct omap_vc_instance_data { - const struct omap_vc_common_data *vc_common; +struct omap_vc_channel { + /* channel state */ + u16 i2c_slave_addr; + u16 volt_reg_addr; + u16 cmd_reg_addr; + u16 setup_time; + u8 cfg_channel; + bool i2c_high_speed; + + /* register access data */ + const struct omap_vc_common *common; u32 smps_sa_mask; u32 smps_volra_mask; + u32 smps_cmdra_mask; u8 cmdval_reg; - u8 smps_sa_shift; - u8 smps_volra_shift; + u8 smps_sa_reg; + u8 smps_volra_reg; + u8 smps_cmdra_reg; + u8 cfg_channel_reg; + u8 cfg_channel_sa_shift; + u8 flags; }; -extern struct omap_vc_instance_data omap3_vc1_data; -extern struct omap_vc_instance_data omap3_vc2_data; +extern struct omap_vc_channel omap3_vc_mpu; +extern struct omap_vc_channel omap3_vc_core; + +extern struct omap_vc_channel omap4_vc_mpu; +extern struct omap_vc_channel omap4_vc_iva; +extern struct omap_vc_channel omap4_vc_core; -extern struct omap_vc_instance_data omap4_vc_mpu_data; -extern struct omap_vc_instance_data omap4_vc_iva_data; -extern struct omap_vc_instance_data omap4_vc_core_data; +void omap_vc_init_channel(struct voltagedomain *voltdm); +int omap_vc_pre_scale(struct voltagedomain *voltdm, + unsigned long target_volt, + u8 *target_vsel, u8 *current_vsel); +void omap_vc_post_scale(struct voltagedomain *voltdm, + unsigned long target_volt, + u8 target_vsel, u8 current_vsel); +int omap_vc_bypass_scale(struct voltagedomain *voltdm, + unsigned long target_volt); #endif diff --git a/arch/arm/mach-omap2/vc3xxx_data.c b/arch/arm/mach-omap2/vc3xxx_data.c index f37dc4b..cfe348e 100644 --- a/arch/arm/mach-omap2/vc3xxx_data.c +++ b/arch/arm/mach-omap2/vc3xxx_data.c @@ -29,9 +29,7 @@ * VC data common to 34xx/36xx chips * XXX This stuff presumably belongs in the vc3xxx.c or vc.c file. */ -static struct omap_vc_common_data omap3_vc_common = { - .smps_sa_reg = OMAP3_PRM_VC_SMPS_SA_OFFSET, - .smps_volra_reg = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET, +static struct omap_vc_common omap3_vc_common = { .bypass_val_reg = OMAP3_PRM_VC_BYPASS_VAL_OFFSET, .data_shift = OMAP3430_DATA_SHIFT, .slaveaddr_shift = OMAP3430_SLAVEADDR_SHIFT, @@ -42,22 +40,33 @@ static struct omap_vc_common_data omap3_vc_common = { .cmd_onlp_shift = OMAP3430_VC_CMD_ONLP_SHIFT, .cmd_ret_shift = OMAP3430_VC_CMD_RET_SHIFT, .cmd_off_shift = OMAP3430_VC_CMD_OFF_SHIFT, + .i2c_cfg_hsen_mask = OMAP3430_HSEN_MASK, + .i2c_cfg_reg = OMAP3_PRM_VC_I2C_CFG_OFFSET, + .i2c_mcode_mask = OMAP3430_MCODE_MASK, }; -struct omap_vc_instance_data omap3_vc1_data = { - .vc_common = &omap3_vc_common, +struct omap_vc_channel omap3_vc_mpu = { + .common = &omap3_vc_common, + .smps_sa_reg = OMAP3_PRM_VC_SMPS_SA_OFFSET, + .smps_volra_reg = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET, + .smps_cmdra_reg = OMAP3_PRM_VC_SMPS_CMD_RA_OFFSET, + .cfg_channel_reg = OMAP3_PRM_VC_CH_CONF_OFFSET, .cmdval_reg = OMAP3_PRM_VC_CMD_VAL_0_OFFSET, - .smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA0_SHIFT, .smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA0_MASK, - .smps_volra_shift = OMAP3430_VOLRA0_SHIFT, .smps_volra_mask = OMAP3430_VOLRA0_MASK, + .smps_cmdra_mask = OMAP3430_CMDRA0_MASK, + .cfg_channel_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA0_SHIFT, }; -struct omap_vc_instance_data omap3_vc2_data = { - .vc_common = &omap3_vc_common, +struct omap_vc_channel omap3_vc_core = { + .common = &omap3_vc_common, + .smps_sa_reg = OMAP3_PRM_VC_SMPS_SA_OFFSET, + .smps_volra_reg = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET, + .smps_cmdra_reg = OMAP3_PRM_VC_SMPS_CMD_RA_OFFSET, + .cfg_channel_reg = OMAP3_PRM_VC_CH_CONF_OFFSET, .cmdval_reg = OMAP3_PRM_VC_CMD_VAL_1_OFFSET, - .smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT, .smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA1_MASK, - .smps_volra_shift = OMAP3430_VOLRA1_SHIFT, .smps_volra_mask = OMAP3430_VOLRA1_MASK, + .smps_cmdra_mask = OMAP3430_CMDRA1_MASK, + .cfg_channel_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT, }; diff --git a/arch/arm/mach-omap2/vc44xx_data.c b/arch/arm/mach-omap2/vc44xx_data.c index a98da8d..2740a96 100644 --- a/arch/arm/mach-omap2/vc44xx_data.c +++ b/arch/arm/mach-omap2/vc44xx_data.c @@ -30,9 +30,7 @@ * VC data common to 44xx chips * XXX This stuff presumably belongs in the vc3xxx.c or vc.c file. */ -static const struct omap_vc_common_data omap4_vc_common = { - .smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET, - .smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET, +static const struct omap_vc_common omap4_vc_common = { .bypass_val_reg = OMAP4_PRM_VC_VAL_BYPASS_OFFSET, .data_shift = OMAP4430_DATA_SHIFT, .slaveaddr_shift = OMAP4430_SLAVEADDR_SHIFT, @@ -43,33 +41,49 @@ static const struct omap_vc_common_data omap4_vc_common = { .cmd_onlp_shift = OMAP4430_ONLP_SHIFT, .cmd_ret_shift = OMAP4430_RET_SHIFT, .cmd_off_shift = OMAP4430_OFF_SHIFT, + .i2c_cfg_reg = OMAP4_PRM_VC_CFG_I2C_MODE_OFFSET, + .i2c_cfg_hsen_mask = OMAP4430_HSMODEEN_MASK, + .i2c_mcode_mask = OMAP4430_HSMCODE_MASK, }; /* VC instance data for each controllable voltage line */ -struct omap_vc_instance_data omap4_vc_mpu_data = { - .vc_common = &omap4_vc_common, +struct omap_vc_channel omap4_vc_mpu = { + .flags = OMAP_VC_CHANNEL_DEFAULT | OMAP_VC_CHANNEL_CFG_MUTANT, + .common = &omap4_vc_common, + .smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET, + .smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET, + .smps_cmdra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_CMD_OFFSET, + .cfg_channel_reg = OMAP4_PRM_VC_CFG_CHANNEL_OFFSET, .cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_MPU_L_OFFSET, - .smps_sa_shift = OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_SHIFT, .smps_sa_mask = OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_MASK, - .smps_volra_shift = OMAP4430_VOLRA_VDD_MPU_L_SHIFT, .smps_volra_mask = OMAP4430_VOLRA_VDD_MPU_L_MASK, + .smps_cmdra_mask = OMAP4430_CMDRA_VDD_MPU_L_MASK, + .cfg_channel_sa_shift = OMAP4430_SA_VDD_MPU_L_SHIFT, }; -struct omap_vc_instance_data omap4_vc_iva_data = { - .vc_common = &omap4_vc_common, +struct omap_vc_channel omap4_vc_iva = { + .common = &omap4_vc_common, + .smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET, + .smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET, + .smps_cmdra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_CMD_OFFSET, + .cfg_channel_reg = OMAP4_PRM_VC_CFG_CHANNEL_OFFSET, .cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_IVA_L_OFFSET, - .smps_sa_shift = OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_SHIFT, .smps_sa_mask = OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_MASK, - .smps_volra_shift = OMAP4430_VOLRA_VDD_IVA_L_SHIFT, .smps_volra_mask = OMAP4430_VOLRA_VDD_IVA_L_MASK, + .smps_cmdra_mask = OMAP4430_CMDRA_VDD_IVA_L_MASK, + .cfg_channel_sa_shift = OMAP4430_SA_VDD_IVA_L_SHIFT, }; -struct omap_vc_instance_data omap4_vc_core_data = { - .vc_common = &omap4_vc_common, +struct omap_vc_channel omap4_vc_core = { + .common = &omap4_vc_common, + .smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET, + .smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET, + .smps_cmdra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_CMD_OFFSET, + .cfg_channel_reg = OMAP4_PRM_VC_CFG_CHANNEL_OFFSET, .cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_CORE_L_OFFSET, - .smps_sa_shift = OMAP4430_SA_VDD_CORE_L_0_6_SHIFT, .smps_sa_mask = OMAP4430_SA_VDD_CORE_L_0_6_MASK, - .smps_volra_shift = OMAP4430_VOLRA_VDD_CORE_L_SHIFT, .smps_volra_mask = OMAP4430_VOLRA_VDD_CORE_L_MASK, + .smps_cmdra_mask = OMAP4430_CMDRA_VDD_CORE_L_MASK, + .cfg_channel_sa_shift = OMAP4430_SA_VDD_CORE_L_SHIFT, }; diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c index 9ef3789..64070ac 100644 --- a/arch/arm/mach-omap2/voltage.c +++ b/arch/arm/mach-omap2/voltage.c @@ -21,10 +21,10 @@ #include <linux/delay.h> #include <linux/io.h> -#include <linux/clk.h> #include <linux/err.h> #include <linux/debugfs.h> #include <linux/slab.h> +#include <linux/clk.h> #include <plat/common.h> @@ -36,839 +36,88 @@ #include "control.h" #include "voltage.h" +#include "powerdomain.h" #include "vc.h" #include "vp.h" -#define VOLTAGE_DIR_SIZE 16 - - -static struct omap_vdd_info **vdd_info; - -/* - * Number of scalable voltage domains. - */ -static int nr_scalable_vdd; - -/* XXX document */ -static s16 prm_mod_offs; -static s16 prm_irqst_ocp_mod_offs; - -static struct dentry *voltage_dir; - -/* Init function pointers */ -static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd, - unsigned long target_volt); - -static u32 omap3_voltage_read_reg(u16 mod, u8 offset) -{ - return omap2_prm_read_mod_reg(mod, offset); -} - -static void omap3_voltage_write_reg(u32 val, u16 mod, u8 offset) -{ - omap2_prm_write_mod_reg(val, mod, offset); -} - -static u32 omap4_voltage_read_reg(u16 mod, u8 offset) -{ - return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, - mod, offset); -} - -static void omap4_voltage_write_reg(u32 val, u16 mod, u8 offset) -{ - omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION, mod, offset); -} - -static int __init _config_common_vdd_data(struct omap_vdd_info *vdd) -{ - char *sys_ck_name; - struct clk *sys_ck; - u32 sys_clk_speed, timeout_val, waittime; - - /* - * XXX Clockfw should handle this, or this should be in a - * struct record - */ - if (cpu_is_omap24xx() || cpu_is_omap34xx()) - sys_ck_name = "sys_ck"; - else if (cpu_is_omap44xx()) - sys_ck_name = "sys_clkin_ck"; - else - return -EINVAL; - - /* - * Sys clk rate is require to calculate vp timeout value and - * smpswaittimemin and smpswaittimemax. - */ - sys_ck = clk_get(NULL, sys_ck_name); - if (IS_ERR(sys_ck)) { - pr_warning("%s: Could not get the sys clk to calculate" - "various vdd_%s params\n", __func__, vdd->voltdm.name); - return -EINVAL; - } - sys_clk_speed = clk_get_rate(sys_ck); - clk_put(sys_ck); - /* Divide to avoid overflow */ - sys_clk_speed /= 1000; - - /* Generic voltage parameters */ - vdd->volt_scale = vp_forceupdate_scale_voltage; - vdd->vp_enabled = false; - - vdd->vp_rt_data.vpconfig_erroroffset = - (vdd->pmic_info->vp_erroroffset << - vdd->vp_data->vp_common->vpconfig_erroroffset_shift); - - timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000; - vdd->vp_rt_data.vlimitto_timeout = timeout_val; - vdd->vp_rt_data.vlimitto_vddmin = vdd->pmic_info->vp_vddmin; - vdd->vp_rt_data.vlimitto_vddmax = vdd->pmic_info->vp_vddmax; - - waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) * - sys_clk_speed) / 1000; - vdd->vp_rt_data.vstepmin_smpswaittimemin = waittime; - vdd->vp_rt_data.vstepmax_smpswaittimemax = waittime; - vdd->vp_rt_data.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin; - vdd->vp_rt_data.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax; - - return 0; -} - -/* Voltage debugfs support */ -static int vp_volt_debug_get(void *data, u64 *val) -{ - struct omap_vdd_info *vdd = (struct omap_vdd_info *) data; - u8 vsel; - - if (!vdd) { - pr_warning("Wrong paramater passed\n"); - return -EINVAL; - } - - vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage); - - if (!vdd->pmic_info->vsel_to_uv) { - pr_warning("PMIC function to convert vsel to voltage" - "in uV not registerd\n"); - return -EINVAL; - } - - *val = vdd->pmic_info->vsel_to_uv(vsel); - return 0; -} - -static int nom_volt_debug_get(void *data, u64 *val) -{ - struct omap_vdd_info *vdd = (struct omap_vdd_info *) data; - - if (!vdd) { - pr_warning("Wrong paramater passed\n"); - return -EINVAL; - } - - *val = omap_voltage_get_nom_volt(&vdd->voltdm); - - return 0; -} - -DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n"); -DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL, - "%llu\n"); -static void vp_latch_vsel(struct omap_vdd_info *vdd) -{ - u32 vpconfig; - unsigned long uvdc; - char vsel; - - uvdc = omap_voltage_get_nom_volt(&vdd->voltdm); - if (!uvdc) { - pr_warning("%s: unable to find current voltage for vdd_%s\n", - __func__, vdd->voltdm.name); - return; - } - - if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) { - pr_warning("%s: PMIC function to convert voltage in uV to" - " vsel not registered\n", __func__); - return; - } - - vsel = vdd->pmic_info->uv_to_vsel(uvdc); - - vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); - vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvoltage_mask | - vdd->vp_data->vp_common->vpconfig_initvdd); - vpconfig |= vsel << vdd->vp_data->vp_common->vpconfig_initvoltage_shift; - - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - - /* Trigger initVDD value copy to voltage processor */ - vdd->write_reg((vpconfig | vdd->vp_data->vp_common->vpconfig_initvdd), - prm_mod_offs, vdd->vp_data->vpconfig); - - /* Clear initVDD copy trigger bit */ - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); -} - -/* Generic voltage init functions */ -static void __init vp_init(struct omap_vdd_info *vdd) -{ - u32 vp_val; - - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, vdd->voltdm.name); - return; - } - - vp_val = vdd->vp_rt_data.vpconfig_erroroffset | - (vdd->vp_rt_data.vpconfig_errorgain << - vdd->vp_data->vp_common->vpconfig_errorgain_shift) | - vdd->vp_data->vp_common->vpconfig_timeouten; - vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vpconfig); - - vp_val = ((vdd->vp_rt_data.vstepmin_smpswaittimemin << - vdd->vp_data->vp_common->vstepmin_smpswaittimemin_shift) | - (vdd->vp_rt_data.vstepmin_stepmin << - vdd->vp_data->vp_common->vstepmin_stepmin_shift)); - vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vstepmin); - - vp_val = ((vdd->vp_rt_data.vstepmax_smpswaittimemax << - vdd->vp_data->vp_common->vstepmax_smpswaittimemax_shift) | - (vdd->vp_rt_data.vstepmax_stepmax << - vdd->vp_data->vp_common->vstepmax_stepmax_shift)); - vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vstepmax); - - vp_val = ((vdd->vp_rt_data.vlimitto_vddmax << - vdd->vp_data->vp_common->vlimitto_vddmax_shift) | - (vdd->vp_rt_data.vlimitto_vddmin << - vdd->vp_data->vp_common->vlimitto_vddmin_shift) | - (vdd->vp_rt_data.vlimitto_timeout << - vdd->vp_data->vp_common->vlimitto_timeout_shift)); - vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vlimitto); -} - -static void __init vdd_debugfs_init(struct omap_vdd_info *vdd) -{ - char *name; - - name = kzalloc(VOLTAGE_DIR_SIZE, GFP_KERNEL); - if (!name) { - pr_warning("%s: Unable to allocate memory for debugfs" - " directory name for vdd_%s", - __func__, vdd->voltdm.name); - return; - } - strcpy(name, "vdd_"); - strcat(name, vdd->voltdm.name); - - vdd->debug_dir = debugfs_create_dir(name, voltage_dir); - kfree(name); - if (IS_ERR(vdd->debug_dir)) { - pr_warning("%s: Unable to create debugfs directory for" - " vdd_%s\n", __func__, vdd->voltdm.name); - vdd->debug_dir = NULL; - return; - } - - (void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vpconfig_errorgain)); - (void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO, - vdd->debug_dir, - &(vdd->vp_rt_data.vstepmin_smpswaittimemin)); - (void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vstepmin_stepmin)); - (void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO, - vdd->debug_dir, - &(vdd->vp_rt_data.vstepmax_smpswaittimemax)); - (void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vstepmax_stepmax)); - (void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vlimitto_vddmax)); - (void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vlimitto_vddmin)); - (void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vlimitto_timeout)); - (void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir, - (void *) vdd, &vp_volt_debug_fops); - (void) debugfs_create_file("curr_nominal_volt", S_IRUGO, - vdd->debug_dir, (void *) vdd, - &nom_volt_debug_fops); -} - -/* Voltage scale and accessory APIs */ -static int _pre_volt_scale(struct omap_vdd_info *vdd, - unsigned long target_volt, u8 *target_vsel, u8 *current_vsel) -{ - struct omap_volt_data *volt_data; - const struct omap_vc_common_data *vc_common; - const struct omap_vp_common_data *vp_common; - u32 vc_cmdval, vp_errgain_val; - - vc_common = vdd->vc_data->vc_common; - vp_common = vdd->vp_data->vp_common; - - /* Check if suffiecient pmic info is available for this vdd */ - if (!vdd->pmic_info) { - pr_err("%s: Insufficient pmic info to scale the vdd_%s\n", - __func__, vdd->voltdm.name); - return -EINVAL; - } - - if (!vdd->pmic_info->uv_to_vsel) { - pr_err("%s: PMIC function to convert voltage in uV to" - "vsel not registered. Hence unable to scale voltage" - "for vdd_%s\n", __func__, vdd->voltdm.name); - return -ENODATA; - } - - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, vdd->voltdm.name); - return -EINVAL; - } - - /* Get volt_data corresponding to target_volt */ - volt_data = omap_voltage_get_voltdata(&vdd->voltdm, target_volt); - if (IS_ERR(volt_data)) - volt_data = NULL; - - *target_vsel = vdd->pmic_info->uv_to_vsel(target_volt); - *current_vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage); - - /* Setting the ON voltage to the new target voltage */ - vc_cmdval = vdd->read_reg(prm_mod_offs, vdd->vc_data->cmdval_reg); - vc_cmdval &= ~vc_common->cmd_on_mask; - vc_cmdval |= (*target_vsel << vc_common->cmd_on_shift); - vdd->write_reg(vc_cmdval, prm_mod_offs, vdd->vc_data->cmdval_reg); - - /* Setting vp errorgain based on the voltage */ - if (volt_data) { - vp_errgain_val = vdd->read_reg(prm_mod_offs, - vdd->vp_data->vpconfig); - vdd->vp_rt_data.vpconfig_errorgain = volt_data->vp_errgain; - vp_errgain_val &= ~vp_common->vpconfig_errorgain_mask; - vp_errgain_val |= vdd->vp_rt_data.vpconfig_errorgain << - vp_common->vpconfig_errorgain_shift; - vdd->write_reg(vp_errgain_val, prm_mod_offs, - vdd->vp_data->vpconfig); - } - - return 0; -} - -static void _post_volt_scale(struct omap_vdd_info *vdd, - unsigned long target_volt, u8 target_vsel, u8 current_vsel) -{ - u32 smps_steps = 0, smps_delay = 0; - - smps_steps = abs(target_vsel - current_vsel); - /* SMPS slew rate / step size. 2us added as buffer. */ - smps_delay = ((smps_steps * vdd->pmic_info->step_size) / - vdd->pmic_info->slew_rate) + 2; - udelay(smps_delay); - - vdd->curr_volt = target_volt; -} - -/* vc_bypass_scale_voltage - VC bypass method of voltage scaling */ -static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd, - unsigned long target_volt) -{ - u32 loop_cnt = 0, retries_cnt = 0; - u32 vc_valid, vc_bypass_val_reg, vc_bypass_value; - u8 target_vsel, current_vsel; - int ret; - - ret = _pre_volt_scale(vdd, target_volt, &target_vsel, ¤t_vsel); - if (ret) - return ret; - - vc_valid = vdd->vc_data->vc_common->valid; - vc_bypass_val_reg = vdd->vc_data->vc_common->bypass_val_reg; - vc_bypass_value = (target_vsel << vdd->vc_data->vc_common->data_shift) | - (vdd->pmic_info->pmic_reg << - vdd->vc_data->vc_common->regaddr_shift) | - (vdd->pmic_info->i2c_slave_addr << - vdd->vc_data->vc_common->slaveaddr_shift); - - vdd->write_reg(vc_bypass_value, prm_mod_offs, vc_bypass_val_reg); - vdd->write_reg(vc_bypass_value | vc_valid, prm_mod_offs, - vc_bypass_val_reg); - - vc_bypass_value = vdd->read_reg(prm_mod_offs, vc_bypass_val_reg); - /* - * Loop till the bypass command is acknowledged from the SMPS. - * NOTE: This is legacy code. The loop count and retry count needs - * to be revisited. - */ - while (!(vc_bypass_value & vc_valid)) { - loop_cnt++; - - if (retries_cnt > 10) { - pr_warning("%s: Retry count exceeded\n", __func__); - return -ETIMEDOUT; - } - - if (loop_cnt > 50) { - retries_cnt++; - loop_cnt = 0; - udelay(10); - } - vc_bypass_value = vdd->read_reg(prm_mod_offs, - vc_bypass_val_reg); - } - - _post_volt_scale(vdd, target_volt, target_vsel, current_vsel); - return 0; -} - -/* VP force update method of voltage scaling */ -static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd, - unsigned long target_volt) -{ - u32 vpconfig; - u8 target_vsel, current_vsel, prm_irqst_reg; - int ret, timeout = 0; - - ret = _pre_volt_scale(vdd, target_volt, &target_vsel, ¤t_vsel); - if (ret) - return ret; - - prm_irqst_reg = vdd->vp_data->prm_irqst_data->prm_irqst_reg; - - /* - * Clear all pending TransactionDone interrupt/status. Typical latency - * is <3us - */ - while (timeout++ < VP_TRANXDONE_TIMEOUT) { - vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status, - prm_irqst_ocp_mod_offs, prm_irqst_reg); - if (!(vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) & - vdd->vp_data->prm_irqst_data->tranxdone_status)) - break; - udelay(1); - } - if (timeout >= VP_TRANXDONE_TIMEOUT) { - pr_warning("%s: vdd_%s TRANXDONE timeout exceeded." - "Voltage change aborted", __func__, vdd->voltdm.name); - return -ETIMEDOUT; - } - - /* Configure for VP-Force Update */ - vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); - vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvdd | - vdd->vp_data->vp_common->vpconfig_forceupdate | - vdd->vp_data->vp_common->vpconfig_initvoltage_mask); - vpconfig |= ((target_vsel << - vdd->vp_data->vp_common->vpconfig_initvoltage_shift)); - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - - /* Trigger initVDD value copy to voltage processor */ - vpconfig |= vdd->vp_data->vp_common->vpconfig_initvdd; - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - - /* Force update of voltage */ - vpconfig |= vdd->vp_data->vp_common->vpconfig_forceupdate; - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - - /* - * Wait for TransactionDone. Typical latency is <200us. - * Depends on SMPSWAITTIMEMIN/MAX and voltage change - */ - timeout = 0; - omap_test_timeout((vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) & - vdd->vp_data->prm_irqst_data->tranxdone_status), - VP_TRANXDONE_TIMEOUT, timeout); - if (timeout >= VP_TRANXDONE_TIMEOUT) - pr_err("%s: vdd_%s TRANXDONE timeout exceeded." - "TRANXDONE never got set after the voltage update\n", - __func__, vdd->voltdm.name); - - _post_volt_scale(vdd, target_volt, target_vsel, current_vsel); - - /* - * Disable TransactionDone interrupt , clear all status, clear - * control registers - */ - timeout = 0; - while (timeout++ < VP_TRANXDONE_TIMEOUT) { - vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status, - prm_irqst_ocp_mod_offs, prm_irqst_reg); - if (!(vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) & - vdd->vp_data->prm_irqst_data->tranxdone_status)) - break; - udelay(1); - } - - if (timeout >= VP_TRANXDONE_TIMEOUT) - pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying" - "to clear the TRANXDONE status\n", - __func__, vdd->voltdm.name); - - vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); - /* Clear initVDD copy trigger bit */ - vpconfig &= ~vdd->vp_data->vp_common->vpconfig_initvdd; - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - /* Clear force bit */ - vpconfig &= ~vdd->vp_data->vp_common->vpconfig_forceupdate; - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - - return 0; -} - -static void __init omap3_vfsm_init(struct omap_vdd_info *vdd) -{ - /* - * Voltage Manager FSM parameters init - * XXX This data should be passed in from the board file - */ - vdd->write_reg(OMAP3_CLKSETUP, prm_mod_offs, OMAP3_PRM_CLKSETUP_OFFSET); - vdd->write_reg(OMAP3_VOLTOFFSET, prm_mod_offs, - OMAP3_PRM_VOLTOFFSET_OFFSET); - vdd->write_reg(OMAP3_VOLTSETUP2, prm_mod_offs, - OMAP3_PRM_VOLTSETUP2_OFFSET); -} - -static void __init omap3_vc_init(struct omap_vdd_info *vdd) -{ - static bool is_initialized; - u8 on_vsel, onlp_vsel, ret_vsel, off_vsel; - u32 vc_val; - - if (is_initialized) - return; - - /* Set up the on, inactive, retention and off voltage */ - on_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->on_volt); - onlp_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->onlp_volt); - ret_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->ret_volt); - off_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->off_volt); - vc_val = ((on_vsel << vdd->vc_data->vc_common->cmd_on_shift) | - (onlp_vsel << vdd->vc_data->vc_common->cmd_onlp_shift) | - (ret_vsel << vdd->vc_data->vc_common->cmd_ret_shift) | - (off_vsel << vdd->vc_data->vc_common->cmd_off_shift)); - vdd->write_reg(vc_val, prm_mod_offs, vdd->vc_data->cmdval_reg); - - /* - * Generic VC parameters init - * XXX This data should be abstracted out - */ - vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, prm_mod_offs, - OMAP3_PRM_VC_CH_CONF_OFFSET); - vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, prm_mod_offs, - OMAP3_PRM_VC_I2C_CFG_OFFSET); - - omap3_vfsm_init(vdd); - - is_initialized = true; -} - - -/* OMAP4 specific voltage init functions */ -static void __init omap4_vc_init(struct omap_vdd_info *vdd) -{ - static bool is_initialized; - u32 vc_val; - - if (is_initialized) - return; - - /* TODO: Configure setup times and CMD_VAL values*/ - - /* - * Generic VC parameters init - * XXX This data should be abstracted out - */ - vc_val = (OMAP4430_RAV_VDD_MPU_L_MASK | OMAP4430_CMD_VDD_MPU_L_MASK | - OMAP4430_RAV_VDD_IVA_L_MASK | OMAP4430_CMD_VDD_IVA_L_MASK | - OMAP4430_RAV_VDD_CORE_L_MASK | OMAP4430_CMD_VDD_CORE_L_MASK); - vdd->write_reg(vc_val, prm_mod_offs, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET); - - /* XXX These are magic numbers and do not belong! */ - vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT); - vdd->write_reg(vc_val, prm_mod_offs, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET); - - is_initialized = true; -} - -static void __init omap_vc_init(struct omap_vdd_info *vdd) -{ - u32 vc_val; - - if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) { - pr_err("%s: PMIC info requried to configure vc for" - "vdd_%s not populated.Hence cannot initialize vc\n", - __func__, vdd->voltdm.name); - return; - } - - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, vdd->voltdm.name); - return; - } - - /* Set up the SMPS_SA(i2c slave address in VC */ - vc_val = vdd->read_reg(prm_mod_offs, - vdd->vc_data->vc_common->smps_sa_reg); - vc_val &= ~vdd->vc_data->smps_sa_mask; - vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_data->smps_sa_shift; - vdd->write_reg(vc_val, prm_mod_offs, - vdd->vc_data->vc_common->smps_sa_reg); - - /* Setup the VOLRA(pmic reg addr) in VC */ - vc_val = vdd->read_reg(prm_mod_offs, - vdd->vc_data->vc_common->smps_volra_reg); - vc_val &= ~vdd->vc_data->smps_volra_mask; - vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_data->smps_volra_shift; - vdd->write_reg(vc_val, prm_mod_offs, - vdd->vc_data->vc_common->smps_volra_reg); - - /* Configure the setup times */ - vc_val = vdd->read_reg(prm_mod_offs, vdd->vfsm->voltsetup_reg); - vc_val &= ~vdd->vfsm->voltsetup_mask; - vc_val |= vdd->pmic_info->volt_setup_time << - vdd->vfsm->voltsetup_shift; - vdd->write_reg(vc_val, prm_mod_offs, vdd->vfsm->voltsetup_reg); - - if (cpu_is_omap34xx()) - omap3_vc_init(vdd); - else if (cpu_is_omap44xx()) - omap4_vc_init(vdd); -} - -static int __init omap_vdd_data_configure(struct omap_vdd_info *vdd) -{ - int ret = -EINVAL; - - if (!vdd->pmic_info) { - pr_err("%s: PMIC info requried to configure vdd_%s not" - "populated.Hence cannot initialize vdd_%s\n", - __func__, vdd->voltdm.name, vdd->voltdm.name); - goto ovdc_out; - } - - if (IS_ERR_VALUE(_config_common_vdd_data(vdd))) - goto ovdc_out; - - if (cpu_is_omap34xx()) { - vdd->read_reg = omap3_voltage_read_reg; - vdd->write_reg = omap3_voltage_write_reg; - ret = 0; - } else if (cpu_is_omap44xx()) { - vdd->read_reg = omap4_voltage_read_reg; - vdd->write_reg = omap4_voltage_write_reg; - ret = 0; - } - -ovdc_out: - return ret; -} +static LIST_HEAD(voltdm_list); /* Public functions */ /** - * omap_voltage_get_nom_volt() - Gets the current non-auto-compensated voltage - * @voltdm: pointer to the VDD for which current voltage info is needed + * voltdm_get_voltage() - Gets the current non-auto-compensated voltage + * @voltdm: pointer to the voltdm for which current voltage info is needed * - * API to get the current non-auto-compensated voltage for a VDD. - * Returns 0 in case of error else returns the current voltage for the VDD. + * API to get the current non-auto-compensated voltage for a voltage domain. + * Returns 0 in case of error else returns the current voltage. */ -unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm) +unsigned long voltdm_get_voltage(struct voltagedomain *voltdm) { - struct omap_vdd_info *vdd; - if (!voltdm || IS_ERR(voltdm)) { pr_warning("%s: VDD specified does not exist!\n", __func__); return 0; } - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - - return vdd->curr_volt; + return voltdm->nominal_volt; } /** - * omap_vp_get_curr_volt() - API to get the current vp voltage. - * @voltdm: pointer to the VDD. - * - * This API returns the current voltage for the specified voltage processor - */ -unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - u8 curr_vsel; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return 0; - } - - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - if (!vdd->read_reg) { - pr_err("%s: No read API for reading vdd_%s regs\n", - __func__, voltdm->name); - return 0; - } - - curr_vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage); - - if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) { - pr_warning("%s: PMIC function to convert vsel to voltage" - "in uV not registerd\n", __func__); - return 0; - } - - return vdd->pmic_info->vsel_to_uv(curr_vsel); -} - -/** - * omap_vp_enable() - API to enable a particular VP - * @voltdm: pointer to the VDD whose VP is to be enabled. - * - * This API enables a particular voltage processor. Needed by the smartreflex - * class drivers. - */ -void omap_vp_enable(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - u32 vpconfig; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return; - } - - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, voltdm->name); - return; - } - - /* If VP is already enabled, do nothing. Return */ - if (vdd->vp_enabled) - return; - - vp_latch_vsel(vdd); - - /* Enable VP */ - vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); - vpconfig |= vdd->vp_data->vp_common->vpconfig_vpenable; - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - vdd->vp_enabled = true; -} - -/** - * omap_vp_disable() - API to disable a particular VP - * @voltdm: pointer to the VDD whose VP is to be disabled. - * - * This API disables a particular voltage processor. Needed by the smartreflex - * class drivers. - */ -void omap_vp_disable(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - u32 vpconfig; - int timeout; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return; - } - - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, voltdm->name); - return; - } - - /* If VP is already disabled, do nothing. Return */ - if (!vdd->vp_enabled) { - pr_warning("%s: Trying to disable VP for vdd_%s when" - "it is already disabled\n", __func__, voltdm->name); - return; - } - - /* Disable VP */ - vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); - vpconfig &= ~vdd->vp_data->vp_common->vpconfig_vpenable; - vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); - - /* - * Wait for VP idle Typical latency is <2us. Maximum latency is ~100us - */ - omap_test_timeout((vdd->read_reg(prm_mod_offs, vdd->vp_data->vstatus)), - VP_IDLE_TIMEOUT, timeout); - - if (timeout >= VP_IDLE_TIMEOUT) - pr_warning("%s: vdd_%s idle timedout\n", - __func__, voltdm->name); - - vdd->vp_enabled = false; - - return; -} - -/** - * omap_voltage_scale_vdd() - API to scale voltage of a particular - * voltage domain. - * @voltdm: pointer to the VDD which is to be scaled. - * @target_volt: The target voltage of the voltage domain + * voltdm_scale() - API to scale voltage of a particular voltage domain. + * @voltdm: pointer to the voltage domain which is to be scaled. + * @target_volt: The target voltage of the voltage domain * * This API should be called by the kernel to do the voltage scaling - * for a particular voltage domain during dvfs or any other situation. + * for a particular voltage domain during DVFS. */ -int omap_voltage_scale_vdd(struct voltagedomain *voltdm, - unsigned long target_volt) +int voltdm_scale(struct voltagedomain *voltdm, + unsigned long target_volt) { - struct omap_vdd_info *vdd; + int ret; if (!voltdm || IS_ERR(voltdm)) { pr_warning("%s: VDD specified does not exist!\n", __func__); return -EINVAL; } - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - - if (!vdd->volt_scale) { + if (!voltdm->scale) { pr_err("%s: No voltage scale API registered for vdd_%s\n", __func__, voltdm->name); return -ENODATA; } - return vdd->volt_scale(vdd, target_volt); + ret = voltdm->scale(voltdm, target_volt); + if (!ret) + voltdm->nominal_volt = target_volt; + + return ret; } /** - * omap_voltage_reset() - Resets the voltage of a particular voltage domain - * to that of the current OPP. - * @voltdm: pointer to the VDD whose voltage is to be reset. + * voltdm_reset() - Resets the voltage of a particular voltage domain + * to that of the current OPP. + * @voltdm: pointer to the voltage domain whose voltage is to be reset. * * This API finds out the correct voltage the voltage domain is supposed * to be at and resets the voltage to that level. Should be used especially * while disabling any voltage compensation modules. */ -void omap_voltage_reset(struct voltagedomain *voltdm) +void voltdm_reset(struct voltagedomain *voltdm) { - unsigned long target_uvdc; + unsigned long target_volt; if (!voltdm || IS_ERR(voltdm)) { pr_warning("%s: VDD specified does not exist!\n", __func__); return; } - target_uvdc = omap_voltage_get_nom_volt(voltdm); - if (!target_uvdc) { + target_volt = voltdm_get_voltage(voltdm); + if (!target_volt) { pr_err("%s: unable to find current voltage for vdd_%s\n", __func__, voltdm->name); return; } - omap_voltage_scale_vdd(voltdm, target_uvdc); + voltdm_scale(voltdm, target_volt); } /** @@ -884,18 +133,14 @@ void omap_voltage_reset(struct voltagedomain *voltdm) * */ void omap_voltage_get_volttable(struct voltagedomain *voltdm, - struct omap_volt_data **volt_data) + struct omap_volt_data **volt_data) { - struct omap_vdd_info *vdd; - if (!voltdm || IS_ERR(voltdm)) { pr_warning("%s: VDD specified does not exist!\n", __func__); return; } - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - - *volt_data = vdd->volt_data; + *volt_data = voltdm->volt_data; } /** @@ -914,9 +159,8 @@ void omap_voltage_get_volttable(struct voltagedomain *voltdm, * domain or if there is no matching entry. */ struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm, - unsigned long volt) + unsigned long volt) { - struct omap_vdd_info *vdd; int i; if (!voltdm || IS_ERR(voltdm)) { @@ -924,17 +168,15 @@ struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm, return ERR_PTR(-EINVAL); } - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - - if (!vdd->volt_data) { + if (!voltdm->volt_data) { pr_warning("%s: voltage table does not exist for vdd_%s\n", __func__, voltdm->name); return ERR_PTR(-ENODATA); } - for (i = 0; vdd->volt_data[i].volt_nominal != 0; i++) { - if (vdd->volt_data[i].volt_nominal == volt) - return &vdd->volt_data[i]; + for (i = 0; voltdm->volt_data[i].volt_nominal != 0; i++) { + if (voltdm->volt_data[i].volt_nominal == volt) + return &voltdm->volt_data[i]; } pr_notice("%s: Unable to match the current voltage with the voltage" @@ -947,54 +189,25 @@ struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm, * omap_voltage_register_pmic() - API to register PMIC specific data * @voltdm: pointer to the VDD for which the PMIC specific data is * to be registered - * @pmic_info: the structure containing pmic info + * @pmic: the structure containing pmic info * * This API is to be called by the SOC/PMIC file to specify the - * pmic specific info as present in omap_volt_pmic_info structure. + * pmic specific info as present in omap_voltdm_pmic structure. */ int omap_voltage_register_pmic(struct voltagedomain *voltdm, - struct omap_volt_pmic_info *pmic_info) + struct omap_voltdm_pmic *pmic) { - struct omap_vdd_info *vdd; - if (!voltdm || IS_ERR(voltdm)) { pr_warning("%s: VDD specified does not exist!\n", __func__); return -EINVAL; } - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - - vdd->pmic_info = pmic_info; + voltdm->pmic = pmic; return 0; } /** - * omap_voltage_get_dbgdir() - API to get pointer to the debugfs directory - * corresponding to a voltage domain. - * - * @voltdm: pointer to the VDD whose debug directory is required. - * - * This API returns pointer to the debugfs directory corresponding - * to the voltage domain. Should be used by drivers requiring to - * add any debug entry for a particular voltage domain. Returns NULL - * in case of error. - */ -struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return NULL; - } - - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - - return vdd->debug_dir; -} - -/** * omap_change_voltscale_method() - API to change the voltage scaling method. * @voltdm: pointer to the VDD whose voltage scaling method * has to be changed. @@ -1005,23 +218,19 @@ struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm) * defined in voltage.h */ void omap_change_voltscale_method(struct voltagedomain *voltdm, - int voltscale_method) + int voltscale_method) { - struct omap_vdd_info *vdd; - if (!voltdm || IS_ERR(voltdm)) { pr_warning("%s: VDD specified does not exist!\n", __func__); return; } - vdd = container_of(voltdm, struct omap_vdd_info, voltdm); - switch (voltscale_method) { case VOLTSCALE_VPFORCEUPDATE: - vdd->volt_scale = vp_forceupdate_scale_voltage; + voltdm->scale = omap_vp_forceupdate_scale; return; case VOLTSCALE_VCBYPASS: - vdd->volt_scale = vc_bypass_scale_voltage; + voltdm->scale = omap_vc_bypass_scale; return; default: pr_warning("%s: Trying to change the method of voltage scaling" @@ -1030,77 +239,192 @@ void omap_change_voltscale_method(struct voltagedomain *voltdm, } /** - * omap_voltage_domain_lookup() - API to get the voltage domain pointer - * @name: Name of the voltage domain + * omap_voltage_late_init() - Init the various voltage parameters * - * This API looks up in the global vdd_info struct for the - * existence of voltage domain <name>. If it exists, the API returns - * a pointer to the voltage domain structure corresponding to the - * VDD<name>. Else retuns error pointer. + * This API is to be called in the later stages of the + * system boot to init the voltage controller and + * voltage processors. */ -struct voltagedomain *omap_voltage_domain_lookup(char *name) +int __init omap_voltage_late_init(void) { - int i; + struct voltagedomain *voltdm; - if (!vdd_info) { - pr_err("%s: Voltage driver init not yet happened.Faulting!\n", + if (list_empty(&voltdm_list)) { + pr_err("%s: Voltage driver support not added\n", __func__); - return ERR_PTR(-EINVAL); + return -EINVAL; } - if (!name) { - pr_err("%s: No name to get the votage domain!\n", __func__); - return ERR_PTR(-EINVAL); + list_for_each_entry(voltdm, &voltdm_list, node) { + struct clk *sys_ck; + + if (!voltdm->scalable) + continue; + + sys_ck = clk_get(NULL, voltdm->sys_clk.name); + if (IS_ERR(sys_ck)) { + pr_warning("%s: Could not get sys clk.\n", __func__); + return -EINVAL; + } + voltdm->sys_clk.rate = clk_get_rate(sys_ck); + WARN_ON(!voltdm->sys_clk.rate); + clk_put(sys_ck); + + if (voltdm->vc) { + voltdm->scale = omap_vc_bypass_scale; + omap_vc_init_channel(voltdm); + } + + if (voltdm->vp) { + voltdm->scale = omap_vp_forceupdate_scale; + omap_vp_init(voltdm); + } } - for (i = 0; i < nr_scalable_vdd; i++) { - if (!(strcmp(name, vdd_info[i]->voltdm.name))) - return &vdd_info[i]->voltdm; + return 0; +} + +static struct voltagedomain *_voltdm_lookup(const char *name) +{ + struct voltagedomain *voltdm, *temp_voltdm; + + voltdm = NULL; + + list_for_each_entry(temp_voltdm, &voltdm_list, node) { + if (!strcmp(name, temp_voltdm->name)) { + voltdm = temp_voltdm; + break; + } } - return ERR_PTR(-EINVAL); + return voltdm; } /** - * omap_voltage_late_init() - Init the various voltage parameters + * voltdm_add_pwrdm - add a powerdomain to a voltagedomain + * @voltdm: struct voltagedomain * to add the powerdomain to + * @pwrdm: struct powerdomain * to associate with a voltagedomain * - * This API is to be called in the later stages of the - * system boot to init the voltage controller and - * voltage processors. + * Associate the powerdomain @pwrdm with a voltagedomain @voltdm. This + * enables the use of voltdm_for_each_pwrdm(). Returns -EINVAL if + * presented with invalid pointers; -ENOMEM if memory could not be allocated; + * or 0 upon success. */ -int __init omap_voltage_late_init(void) +int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm) { - int i; + if (!voltdm || !pwrdm) + return -EINVAL; - if (!vdd_info) { - pr_err("%s: Voltage driver support not added\n", - __func__); + pr_debug("voltagedomain: associating powerdomain %s with voltagedomain " + "%s\n", pwrdm->name, voltdm->name); + + list_add(&pwrdm->voltdm_node, &voltdm->pwrdm_list); + + return 0; +} + +/** + * voltdm_for_each_pwrdm - call function for each pwrdm in a voltdm + * @voltdm: struct voltagedomain * to iterate over + * @fn: callback function * + * + * Call the supplied function @fn for each powerdomain in the + * voltagedomain @voltdm. Returns -EINVAL if presented with invalid + * pointers; or passes along the last return value of the callback + * function, which should be 0 for success or anything else to + * indicate failure. + */ +int voltdm_for_each_pwrdm(struct voltagedomain *voltdm, + int (*fn)(struct voltagedomain *voltdm, + struct powerdomain *pwrdm)) +{ + struct powerdomain *pwrdm; + int ret = 0; + + if (!fn) return -EINVAL; - } - voltage_dir = debugfs_create_dir("voltage", NULL); - if (IS_ERR(voltage_dir)) - pr_err("%s: Unable to create voltage debugfs main dir\n", - __func__); - for (i = 0; i < nr_scalable_vdd; i++) { - if (omap_vdd_data_configure(vdd_info[i])) - continue; - omap_vc_init(vdd_info[i]); - vp_init(vdd_info[i]); - vdd_debugfs_init(vdd_info[i]); + list_for_each_entry(pwrdm, &voltdm->pwrdm_list, voltdm_node) + ret = (*fn)(voltdm, pwrdm); + + return ret; +} + +/** + * voltdm_for_each - call function on each registered voltagedomain + * @fn: callback function * + * + * Call the supplied function @fn for each registered voltagedomain. + * The callback function @fn can return anything but 0 to bail out + * early from the iterator. Returns the last return value of the + * callback function, which should be 0 for success or anything else + * to indicate failure; or -EINVAL if the function pointer is null. + */ +int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user), + void *user) +{ + struct voltagedomain *temp_voltdm; + int ret = 0; + + if (!fn) + return -EINVAL; + + list_for_each_entry(temp_voltdm, &voltdm_list, node) { + ret = (*fn)(temp_voltdm, user); + if (ret) + break; } - return 0; + return ret; } -/* XXX document */ -int __init omap_voltage_early_init(s16 prm_mod, s16 prm_irqst_ocp_mod, - struct omap_vdd_info *omap_vdd_array[], - u8 omap_vdd_count) +static int _voltdm_register(struct voltagedomain *voltdm) { - prm_mod_offs = prm_mod; - prm_irqst_ocp_mod_offs = prm_irqst_ocp_mod; - vdd_info = omap_vdd_array; - nr_scalable_vdd = omap_vdd_count; + if (!voltdm || !voltdm->name) + return -EINVAL; + + INIT_LIST_HEAD(&voltdm->pwrdm_list); + list_add(&voltdm->node, &voltdm_list); + + pr_debug("voltagedomain: registered %s\n", voltdm->name); + return 0; } + +/** + * voltdm_lookup - look up a voltagedomain by name, return a pointer + * @name: name of voltagedomain + * + * Find a registered voltagedomain by its name @name. Returns a pointer + * to the struct voltagedomain if found, or NULL otherwise. + */ +struct voltagedomain *voltdm_lookup(const char *name) +{ + struct voltagedomain *voltdm ; + + if (!name) + return NULL; + + voltdm = _voltdm_lookup(name); + + return voltdm; +} + +/** + * voltdm_init - set up the voltagedomain layer + * @voltdm_list: array of struct voltagedomain pointers to register + * + * Loop through the array of voltagedomains @voltdm_list, registering all + * that are available on the current CPU. If voltdm_list is supplied + * and not null, all of the referenced voltagedomains will be + * registered. No return value. + */ +void voltdm_init(struct voltagedomain **voltdms) +{ + struct voltagedomain **v; + + if (voltdms) { + for (v = voltdms; *v; v++) + _voltdm_register(*v); + } +} diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h index e9f5408..4c09809 100644 --- a/arch/arm/mach-omap2/voltage.h +++ b/arch/arm/mach-omap2/voltage.h @@ -19,6 +19,8 @@ #include "vc.h" #include "vp.h" +struct powerdomain; + /* XXX document */ #define VOLTSCALE_VPFORCEUPDATE 1 #define VOLTSCALE_VCBYPASS 2 @@ -32,29 +34,60 @@ #define OMAP3_VOLTSETUP2 0xff /** - * struct omap_vfsm_instance_data - per-voltage manager FSM register/bitfield + * struct omap_vfsm_instance - per-voltage manager FSM register/bitfield * data * @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register * @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base - * @voltsetup_shift: SETUP_TIME* field shift in the PRM_VOLTSETUP* register * * XXX What about VOLTOFFSET/VOLTCTRL? - * XXX It is not necessary to have both a _mask and a _shift for the same - * bitfield - remove one! */ -struct omap_vfsm_instance_data { +struct omap_vfsm_instance { u32 voltsetup_mask; u8 voltsetup_reg; - u8 voltsetup_shift; }; /** * struct voltagedomain - omap voltage domain global structure. - * @name: Name of the voltage domain which can be used as a unique - * identifier. + * @name: Name of the voltage domain which can be used as a unique identifier. + * @scalable: Whether or not this voltage domain is scalable + * @node: list_head linking all voltage domains + * @pwrdm_list: list_head linking all powerdomains in this voltagedomain + * @vc: pointer to VC channel associated with this voltagedomain + * @vp: pointer to VP associated with this voltagedomain + * @read: read a VC/VP register + * @write: write a VC/VP register + * @read: read-modify-write a VC/VP register + * @sys_clk: system clock name/frequency, used for various timing calculations + * @scale: function used to scale the voltage of the voltagedomain + * @nominal_volt: current nominal voltage for this voltage domain + * @volt_data: voltage table having the distinct voltages supported + * by the domain and other associated per voltage data. */ struct voltagedomain { char *name; + bool scalable; + struct list_head node; + struct list_head pwrdm_list; + struct omap_vc_channel *vc; + const struct omap_vfsm_instance *vfsm; + struct omap_vp_instance *vp; + struct omap_voltdm_pmic *pmic; + + /* VC/VP register access functions: SoC specific */ + u32 (*read) (u8 offset); + void (*write) (u32 val, u8 offset); + u32 (*rmw)(u32 mask, u32 bits, u8 offset); + + union { + const char *name; + u32 rate; + } sys_clk; + + int (*scale) (struct voltagedomain *voltdm, + unsigned long target_volt); + + u32 nominal_volt; + struct omap_volt_data *volt_data; }; /** @@ -77,13 +110,18 @@ struct omap_volt_data { }; /** - * struct omap_volt_pmic_info - PMIC specific data required by voltage driver. + * struct omap_voltdm_pmic - PMIC specific data required by voltage driver. * @slew_rate: PMIC slew rate (in uv/us) * @step_size: PMIC voltage step size (in uv) + * @i2c_slave_addr: I2C slave address of PMIC + * @volt_reg_addr: voltage configuration register address + * @cmd_reg_addr: command (on, on-LP, ret, off) configuration register address + * @i2c_high_speed: whether VC uses I2C high-speed mode to PMIC + * @i2c_mcode: master code value for I2C high-speed preamble transmission * @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV. * @uv_to_vsel: PMIC API to convert voltage in uV to vsel value. */ -struct omap_volt_pmic_info { +struct omap_voltdm_pmic { int slew_rate; int step_size; u32 on_volt; @@ -91,81 +129,34 @@ struct omap_volt_pmic_info { u32 ret_volt; u32 off_volt; u16 volt_setup_time; + u16 i2c_slave_addr; + u16 volt_reg_addr; + u16 cmd_reg_addr; u8 vp_erroroffset; u8 vp_vstepmin; u8 vp_vstepmax; u8 vp_vddmin; u8 vp_vddmax; u8 vp_timeout_us; - u8 i2c_slave_addr; - u8 pmic_reg; + bool i2c_high_speed; + u8 i2c_mcode; unsigned long (*vsel_to_uv) (const u8 vsel); u8 (*uv_to_vsel) (unsigned long uV); }; -/** - * omap_vdd_info - Per Voltage Domain info - * - * @volt_data : voltage table having the distinct voltages supported - * by the domain and other associated per voltage data. - * @pmic_info : pmic specific parameters which should be populted by - * the pmic drivers. - * @vp_data : the register values, shifts, masks for various - * vp registers - * @vp_rt_data : VP data derived at runtime, not predefined - * @vc_data : structure containing various various vc registers, - * shifts, masks etc. - * @vfsm : voltage manager FSM data - * @voltdm : pointer to the voltage domain structure - * @debug_dir : debug directory for this voltage domain. - * @curr_volt : current voltage for this vdd. - * @vp_enabled : flag to keep track of whether vp is enabled or not - * @volt_scale : API to scale the voltage of the vdd. - */ -struct omap_vdd_info { - struct omap_volt_data *volt_data; - struct omap_volt_pmic_info *pmic_info; - struct omap_vp_instance_data *vp_data; - struct omap_vp_runtime_data vp_rt_data; - struct omap_vc_instance_data *vc_data; - const struct omap_vfsm_instance_data *vfsm; - struct voltagedomain voltdm; - struct dentry *debug_dir; - u32 curr_volt; - bool vp_enabled; - u32 (*read_reg) (u16 mod, u8 offset); - void (*write_reg) (u32 val, u16 mod, u8 offset); - int (*volt_scale) (struct omap_vdd_info *vdd, - unsigned long target_volt); -}; - -unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm); -void omap_vp_enable(struct voltagedomain *voltdm); -void omap_vp_disable(struct voltagedomain *voltdm); -int omap_voltage_scale_vdd(struct voltagedomain *voltdm, - unsigned long target_volt); -void omap_voltage_reset(struct voltagedomain *voltdm); void omap_voltage_get_volttable(struct voltagedomain *voltdm, struct omap_volt_data **volt_data); struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm, unsigned long volt); -unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm); -struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm); -int __init omap_voltage_early_init(s16 prm_mod, s16 prm_irqst_mod, - struct omap_vdd_info *omap_vdd_array[], - u8 omap_vdd_count); #ifdef CONFIG_PM int omap_voltage_register_pmic(struct voltagedomain *voltdm, - struct omap_volt_pmic_info *pmic_info); + struct omap_voltdm_pmic *pmic); void omap_change_voltscale_method(struct voltagedomain *voltdm, int voltscale_method); -/* API to get the voltagedomain pointer */ -struct voltagedomain *omap_voltage_domain_lookup(char *name); - int omap_voltage_late_init(void); #else static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm, - struct omap_volt_pmic_info *pmic_info) + struct omap_voltdm_pmic *pmic) { return -EINVAL; } @@ -175,10 +166,21 @@ static inline int omap_voltage_late_init(void) { return -EINVAL; } -static inline struct voltagedomain *omap_voltage_domain_lookup(char *name) -{ - return ERR_PTR(-EINVAL); -} #endif +extern void omap2xxx_voltagedomains_init(void); +extern void omap3xxx_voltagedomains_init(void); +extern void omap44xx_voltagedomains_init(void); + +struct voltagedomain *voltdm_lookup(const char *name); +void voltdm_init(struct voltagedomain **voltdm_list); +int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm); +int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user), + void *user); +int voltdm_for_each_pwrdm(struct voltagedomain *voltdm, + int (*fn)(struct voltagedomain *voltdm, + struct powerdomain *pwrdm)); +int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt); +void voltdm_reset(struct voltagedomain *voltdm); +unsigned long voltdm_get_voltage(struct voltagedomain *voltdm); #endif diff --git a/arch/arm/mach-omap2/voltagedomains2xxx_data.c b/arch/arm/mach-omap2/voltagedomains2xxx_data.c new file mode 100644 index 0000000..7a41349 --- /dev/null +++ b/arch/arm/mach-omap2/voltagedomains2xxx_data.c @@ -0,0 +1,32 @@ +/* + * OMAP3 voltage domain data + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/kernel.h> +#include <linux/init.h> + +#include "voltage.h" + +static struct voltagedomain omap2_voltdm_core = { + .name = "core", +}; + +static struct voltagedomain omap2_voltdm_wkup = { + .name = "wakeup", +}; + +static struct voltagedomain *voltagedomains_omap2[] __initdata = { + &omap2_voltdm_core, + &omap2_voltdm_wkup, + NULL, +}; + +void __init omap2xxx_voltagedomains_init(void) +{ + voltdm_init(voltagedomains_omap2); +} diff --git a/arch/arm/mach-omap2/voltagedomains3xxx_data.c b/arch/arm/mach-omap2/voltagedomains3xxx_data.c index def230f..071101d 100644 --- a/arch/arm/mach-omap2/voltagedomains3xxx_data.c +++ b/arch/arm/mach-omap2/voltagedomains3xxx_data.c @@ -31,65 +31,70 @@ * VDD data */ -static const struct omap_vfsm_instance_data omap3_vdd1_vfsm_data = { +static const struct omap_vfsm_instance omap3_vdd1_vfsm = { .voltsetup_reg = OMAP3_PRM_VOLTSETUP1_OFFSET, - .voltsetup_shift = OMAP3430_SETUP_TIME1_SHIFT, .voltsetup_mask = OMAP3430_SETUP_TIME1_MASK, }; -static struct omap_vdd_info omap3_vdd1_info = { - .vp_data = &omap3_vp1_data, - .vc_data = &omap3_vc1_data, - .vfsm = &omap3_vdd1_vfsm_data, - .voltdm = { - .name = "mpu", - }, -}; - -static const struct omap_vfsm_instance_data omap3_vdd2_vfsm_data = { +static const struct omap_vfsm_instance omap3_vdd2_vfsm = { .voltsetup_reg = OMAP3_PRM_VOLTSETUP1_OFFSET, - .voltsetup_shift = OMAP3430_SETUP_TIME2_SHIFT, .voltsetup_mask = OMAP3430_SETUP_TIME2_MASK, }; -static struct omap_vdd_info omap3_vdd2_info = { - .vp_data = &omap3_vp2_data, - .vc_data = &omap3_vc2_data, - .vfsm = &omap3_vdd2_vfsm_data, - .voltdm = { - .name = "core", - }, +static struct voltagedomain omap3_voltdm_mpu = { + .name = "mpu_iva", + .scalable = true, + .read = omap3_prm_vcvp_read, + .write = omap3_prm_vcvp_write, + .rmw = omap3_prm_vcvp_rmw, + .vc = &omap3_vc_mpu, + .vfsm = &omap3_vdd1_vfsm, + .vp = &omap3_vp_mpu, }; -/* OMAP3 VDD structures */ -static struct omap_vdd_info *omap3_vdd_info[] = { - &omap3_vdd1_info, - &omap3_vdd2_info, +static struct voltagedomain omap3_voltdm_core = { + .name = "core", + .scalable = true, + .read = omap3_prm_vcvp_read, + .write = omap3_prm_vcvp_write, + .rmw = omap3_prm_vcvp_rmw, + .vc = &omap3_vc_core, + .vfsm = &omap3_vdd2_vfsm, + .vp = &omap3_vp_core, }; -/* OMAP3 specific voltage init functions */ -static int __init omap3xxx_voltage_early_init(void) -{ - s16 prm_mod = OMAP3430_GR_MOD; - s16 prm_irqst_ocp_mod = OCP_MOD; +static struct voltagedomain omap3_voltdm_wkup = { + .name = "wakeup", +}; - if (!cpu_is_omap34xx()) - return 0; +static struct voltagedomain *voltagedomains_omap3[] __initdata = { + &omap3_voltdm_mpu, + &omap3_voltdm_core, + &omap3_voltdm_wkup, + NULL, +}; + +static const char *sys_clk_name __initdata = "sys_ck"; + +void __init omap3xxx_voltagedomains_init(void) +{ + struct voltagedomain *voltdm; + int i; /* * XXX Will depend on the process, validation, and binning * for the currently-running IC */ if (cpu_is_omap3630()) { - omap3_vdd1_info.volt_data = omap36xx_vddmpu_volt_data; - omap3_vdd2_info.volt_data = omap36xx_vddcore_volt_data; + omap3_voltdm_mpu.volt_data = omap36xx_vddmpu_volt_data; + omap3_voltdm_core.volt_data = omap36xx_vddcore_volt_data; } else { - omap3_vdd1_info.volt_data = omap34xx_vddmpu_volt_data; - omap3_vdd2_info.volt_data = omap34xx_vddcore_volt_data; + omap3_voltdm_mpu.volt_data = omap34xx_vddmpu_volt_data; + omap3_voltdm_core.volt_data = omap34xx_vddcore_volt_data; } - return omap_voltage_early_init(prm_mod, prm_irqst_ocp_mod, - omap3_vdd_info, - ARRAY_SIZE(omap3_vdd_info)); + for (i = 0; voltdm = voltagedomains_omap3[i], voltdm; i++) + voltdm->sys_clk.name = sys_clk_name; + + voltdm_init(voltagedomains_omap3); }; -core_initcall(omap3xxx_voltage_early_init); diff --git a/arch/arm/mach-omap2/voltagedomains44xx_data.c b/arch/arm/mach-omap2/voltagedomains44xx_data.c index cb64996..c4584e9 100644 --- a/arch/arm/mach-omap2/voltagedomains44xx_data.c +++ b/arch/arm/mach-omap2/voltagedomains44xx_data.c @@ -32,71 +32,80 @@ #include "vc.h" #include "vp.h" -static const struct omap_vfsm_instance_data omap4_vdd_mpu_vfsm_data = { +static const struct omap_vfsm_instance omap4_vdd_mpu_vfsm = { .voltsetup_reg = OMAP4_PRM_VOLTSETUP_MPU_RET_SLEEP_OFFSET, }; -static struct omap_vdd_info omap4_vdd_mpu_info = { - .vp_data = &omap4_vp_mpu_data, - .vc_data = &omap4_vc_mpu_data, - .vfsm = &omap4_vdd_mpu_vfsm_data, - .voltdm = { - .name = "mpu", - }, +static const struct omap_vfsm_instance omap4_vdd_iva_vfsm = { + .voltsetup_reg = OMAP4_PRM_VOLTSETUP_IVA_RET_SLEEP_OFFSET, }; -static const struct omap_vfsm_instance_data omap4_vdd_iva_vfsm_data = { - .voltsetup_reg = OMAP4_PRM_VOLTSETUP_IVA_RET_SLEEP_OFFSET, +static const struct omap_vfsm_instance omap4_vdd_core_vfsm = { + .voltsetup_reg = OMAP4_PRM_VOLTSETUP_CORE_RET_SLEEP_OFFSET, }; -static struct omap_vdd_info omap4_vdd_iva_info = { - .vp_data = &omap4_vp_iva_data, - .vc_data = &omap4_vc_iva_data, - .vfsm = &omap4_vdd_iva_vfsm_data, - .voltdm = { - .name = "iva", - }, +static struct voltagedomain omap4_voltdm_mpu = { + .name = "mpu", + .scalable = true, + .read = omap4_prm_vcvp_read, + .write = omap4_prm_vcvp_write, + .rmw = omap4_prm_vcvp_rmw, + .vc = &omap4_vc_mpu, + .vfsm = &omap4_vdd_mpu_vfsm, + .vp = &omap4_vp_mpu, }; -static const struct omap_vfsm_instance_data omap4_vdd_core_vfsm_data = { - .voltsetup_reg = OMAP4_PRM_VOLTSETUP_CORE_RET_SLEEP_OFFSET, +static struct voltagedomain omap4_voltdm_iva = { + .name = "iva", + .scalable = true, + .read = omap4_prm_vcvp_read, + .write = omap4_prm_vcvp_write, + .rmw = omap4_prm_vcvp_rmw, + .vc = &omap4_vc_iva, + .vfsm = &omap4_vdd_iva_vfsm, + .vp = &omap4_vp_iva, }; -static struct omap_vdd_info omap4_vdd_core_info = { - .vp_data = &omap4_vp_core_data, - .vc_data = &omap4_vc_core_data, - .vfsm = &omap4_vdd_core_vfsm_data, - .voltdm = { - .name = "core", - }, +static struct voltagedomain omap4_voltdm_core = { + .name = "core", + .scalable = true, + .read = omap4_prm_vcvp_read, + .write = omap4_prm_vcvp_write, + .rmw = omap4_prm_vcvp_rmw, + .vc = &omap4_vc_core, + .vfsm = &omap4_vdd_core_vfsm, + .vp = &omap4_vp_core, }; -/* OMAP4 VDD structures */ -static struct omap_vdd_info *omap4_vdd_info[] = { - &omap4_vdd_mpu_info, - &omap4_vdd_iva_info, - &omap4_vdd_core_info, +static struct voltagedomain omap4_voltdm_wkup = { + .name = "wakeup", }; -/* OMAP4 specific voltage init functions */ -static int __init omap44xx_voltage_early_init(void) -{ - s16 prm_mod = OMAP4430_PRM_DEVICE_INST; - s16 prm_irqst_ocp_mod = OMAP4430_PRM_OCP_SOCKET_INST; +static struct voltagedomain *voltagedomains_omap4[] __initdata = { + &omap4_voltdm_mpu, + &omap4_voltdm_iva, + &omap4_voltdm_core, + &omap4_voltdm_wkup, + NULL, +}; + +static const char *sys_clk_name __initdata = "sys_clkin_ck"; - if (!cpu_is_omap44xx()) - return 0; +void __init omap44xx_voltagedomains_init(void) +{ + struct voltagedomain *voltdm; + int i; /* * XXX Will depend on the process, validation, and binning * for the currently-running IC */ - omap4_vdd_mpu_info.volt_data = omap44xx_vdd_mpu_volt_data; - omap4_vdd_iva_info.volt_data = omap44xx_vdd_iva_volt_data; - omap4_vdd_core_info.volt_data = omap44xx_vdd_core_volt_data; + omap4_voltdm_mpu.volt_data = omap44xx_vdd_mpu_volt_data; + omap4_voltdm_iva.volt_data = omap44xx_vdd_iva_volt_data; + omap4_voltdm_core.volt_data = omap44xx_vdd_core_volt_data; + + for (i = 0; voltdm = voltagedomains_omap4[i], voltdm; i++) + voltdm->sys_clk.name = sys_clk_name; - return omap_voltage_early_init(prm_mod, prm_irqst_ocp_mod, - omap4_vdd_info, - ARRAY_SIZE(omap4_vdd_info)); + voltdm_init(voltagedomains_omap4); }; -core_initcall(omap44xx_voltage_early_init); diff --git a/arch/arm/mach-omap2/vp.c b/arch/arm/mach-omap2/vp.c new file mode 100644 index 0000000..66bd700 --- /dev/null +++ b/arch/arm/mach-omap2/vp.c @@ -0,0 +1,278 @@ +#include <linux/kernel.h> +#include <linux/init.h> + +#include <plat/common.h> + +#include "voltage.h" +#include "vp.h" +#include "prm-regbits-34xx.h" +#include "prm-regbits-44xx.h" +#include "prm44xx.h" + +static u32 _vp_set_init_voltage(struct voltagedomain *voltdm, u32 volt) +{ + struct omap_vp_instance *vp = voltdm->vp; + u32 vpconfig; + char vsel; + + vsel = voltdm->pmic->uv_to_vsel(volt); + + vpconfig = voltdm->read(vp->vpconfig); + vpconfig &= ~(vp->common->vpconfig_initvoltage_mask | + vp->common->vpconfig_forceupdate | + vp->common->vpconfig_initvdd); + vpconfig |= vsel << __ffs(vp->common->vpconfig_initvoltage_mask); + voltdm->write(vpconfig, vp->vpconfig); + + /* Trigger initVDD value copy to voltage processor */ + voltdm->write((vpconfig | vp->common->vpconfig_initvdd), + vp->vpconfig); + + /* Clear initVDD copy trigger bit */ + voltdm->write(vpconfig, vp->vpconfig); + + return vpconfig; +} + +/* Generic voltage init functions */ +void __init omap_vp_init(struct voltagedomain *voltdm) +{ + struct omap_vp_instance *vp = voltdm->vp; + u32 val, sys_clk_rate, timeout, waittime; + u32 vddmin, vddmax, vstepmin, vstepmax; + + if (!voltdm->read || !voltdm->write) { + pr_err("%s: No read/write API for accessing vdd_%s regs\n", + __func__, voltdm->name); + return; + } + + vp->enabled = false; + + /* Divide to avoid overflow */ + sys_clk_rate = voltdm->sys_clk.rate / 1000; + + timeout = (sys_clk_rate * voltdm->pmic->vp_timeout_us) / 1000; + vddmin = voltdm->pmic->vp_vddmin; + vddmax = voltdm->pmic->vp_vddmax; + + waittime = ((voltdm->pmic->step_size / voltdm->pmic->slew_rate) * + sys_clk_rate) / 1000; + vstepmin = voltdm->pmic->vp_vstepmin; + vstepmax = voltdm->pmic->vp_vstepmax; + + /* + * VP_CONFIG: error gain is not set here, it will be updated + * on each scale, based on OPP. + */ + val = (voltdm->pmic->vp_erroroffset << + __ffs(voltdm->vp->common->vpconfig_erroroffset_mask)) | + vp->common->vpconfig_timeouten; + voltdm->write(val, vp->vpconfig); + + /* VSTEPMIN */ + val = (waittime << vp->common->vstepmin_smpswaittimemin_shift) | + (vstepmin << vp->common->vstepmin_stepmin_shift); + voltdm->write(val, vp->vstepmin); + + /* VSTEPMAX */ + val = (vstepmax << vp->common->vstepmax_stepmax_shift) | + (waittime << vp->common->vstepmax_smpswaittimemax_shift); + voltdm->write(val, vp->vstepmax); + + /* VLIMITTO */ + val = (vddmax << vp->common->vlimitto_vddmax_shift) | + (vddmin << vp->common->vlimitto_vddmin_shift) | + (timeout << vp->common->vlimitto_timeout_shift); + voltdm->write(val, vp->vlimitto); +} + +int omap_vp_update_errorgain(struct voltagedomain *voltdm, + unsigned long target_volt) +{ + struct omap_volt_data *volt_data; + + if (!voltdm->vp) + return -EINVAL; + + /* Get volt_data corresponding to target_volt */ + volt_data = omap_voltage_get_voltdata(voltdm, target_volt); + if (IS_ERR(volt_data)) + return -EINVAL; + + /* Setting vp errorgain based on the voltage */ + voltdm->rmw(voltdm->vp->common->vpconfig_errorgain_mask, + volt_data->vp_errgain << + __ffs(voltdm->vp->common->vpconfig_errorgain_mask), + voltdm->vp->vpconfig); + + return 0; +} + +/* VP force update method of voltage scaling */ +int omap_vp_forceupdate_scale(struct voltagedomain *voltdm, + unsigned long target_volt) +{ + struct omap_vp_instance *vp = voltdm->vp; + u32 vpconfig; + u8 target_vsel, current_vsel; + int ret, timeout = 0; + + ret = omap_vc_pre_scale(voltdm, target_volt, &target_vsel, ¤t_vsel); + if (ret) + return ret; + + /* + * Clear all pending TransactionDone interrupt/status. Typical latency + * is <3us + */ + while (timeout++ < VP_TRANXDONE_TIMEOUT) { + vp->common->ops->clear_txdone(vp->id); + if (!vp->common->ops->check_txdone(vp->id)) + break; + udelay(1); + } + if (timeout >= VP_TRANXDONE_TIMEOUT) { + pr_warning("%s: vdd_%s TRANXDONE timeout exceeded." + "Voltage change aborted", __func__, voltdm->name); + return -ETIMEDOUT; + } + + vpconfig = _vp_set_init_voltage(voltdm, target_volt); + + /* Force update of voltage */ + voltdm->write(vpconfig | vp->common->vpconfig_forceupdate, + voltdm->vp->vpconfig); + + /* + * Wait for TransactionDone. Typical latency is <200us. + * Depends on SMPSWAITTIMEMIN/MAX and voltage change + */ + timeout = 0; + omap_test_timeout(vp->common->ops->check_txdone(vp->id), + VP_TRANXDONE_TIMEOUT, timeout); + if (timeout >= VP_TRANXDONE_TIMEOUT) + pr_err("%s: vdd_%s TRANXDONE timeout exceeded." + "TRANXDONE never got set after the voltage update\n", + __func__, voltdm->name); + + omap_vc_post_scale(voltdm, target_volt, target_vsel, current_vsel); + + /* + * Disable TransactionDone interrupt , clear all status, clear + * control registers + */ + timeout = 0; + while (timeout++ < VP_TRANXDONE_TIMEOUT) { + vp->common->ops->clear_txdone(vp->id); + if (!vp->common->ops->check_txdone(vp->id)) + break; + udelay(1); + } + + if (timeout >= VP_TRANXDONE_TIMEOUT) + pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying" + "to clear the TRANXDONE status\n", + __func__, voltdm->name); + + /* Clear force bit */ + voltdm->write(vpconfig, vp->vpconfig); + + return 0; +} + +/** + * omap_vp_enable() - API to enable a particular VP + * @voltdm: pointer to the VDD whose VP is to be enabled. + * + * This API enables a particular voltage processor. Needed by the smartreflex + * class drivers. + */ +void omap_vp_enable(struct voltagedomain *voltdm) +{ + struct omap_vp_instance *vp; + u32 vpconfig, volt; + + if (!voltdm || IS_ERR(voltdm)) { + pr_warning("%s: VDD specified does not exist!\n", __func__); + return; + } + + vp = voltdm->vp; + if (!voltdm->read || !voltdm->write) { + pr_err("%s: No read/write API for accessing vdd_%s regs\n", + __func__, voltdm->name); + return; + } + + /* If VP is already enabled, do nothing. Return */ + if (vp->enabled) + return; + + volt = voltdm_get_voltage(voltdm); + if (!volt) { + pr_warning("%s: unable to find current voltage for %s\n", + __func__, voltdm->name); + return; + } + + vpconfig = _vp_set_init_voltage(voltdm, volt); + + /* Enable VP */ + vpconfig |= vp->common->vpconfig_vpenable; + voltdm->write(vpconfig, vp->vpconfig); + + vp->enabled = true; +} + +/** + * omap_vp_disable() - API to disable a particular VP + * @voltdm: pointer to the VDD whose VP is to be disabled. + * + * This API disables a particular voltage processor. Needed by the smartreflex + * class drivers. + */ +void omap_vp_disable(struct voltagedomain *voltdm) +{ + struct omap_vp_instance *vp; + u32 vpconfig; + int timeout; + + if (!voltdm || IS_ERR(voltdm)) { + pr_warning("%s: VDD specified does not exist!\n", __func__); + return; + } + + vp = voltdm->vp; + if (!voltdm->read || !voltdm->write) { + pr_err("%s: No read/write API for accessing vdd_%s regs\n", + __func__, voltdm->name); + return; + } + + /* If VP is already disabled, do nothing. Return */ + if (!vp->enabled) { + pr_warning("%s: Trying to disable VP for vdd_%s when" + "it is already disabled\n", __func__, voltdm->name); + return; + } + + /* Disable VP */ + vpconfig = voltdm->read(vp->vpconfig); + vpconfig &= ~vp->common->vpconfig_vpenable; + voltdm->write(vpconfig, vp->vpconfig); + + /* + * Wait for VP idle Typical latency is <2us. Maximum latency is ~100us + */ + omap_test_timeout((voltdm->read(vp->vstatus)), + VP_IDLE_TIMEOUT, timeout); + + if (timeout >= VP_IDLE_TIMEOUT) + pr_warning("%s: vdd_%s idle timedout\n", + __func__, voltdm->name); + + vp->enabled = false; + + return; +} diff --git a/arch/arm/mach-omap2/vp.h b/arch/arm/mach-omap2/vp.h index 7ce134f..7c155d2 100644 --- a/arch/arm/mach-omap2/vp.h +++ b/arch/arm/mach-omap2/vp.h @@ -19,44 +19,60 @@ #include <linux/kernel.h> +struct voltagedomain; + +/* + * Voltage Processor (VP) identifiers + */ +#define OMAP3_VP_VDD_MPU_ID 0 +#define OMAP3_VP_VDD_CORE_ID 1 +#define OMAP4_VP_VDD_CORE_ID 0 +#define OMAP4_VP_VDD_IVA_ID 1 +#define OMAP4_VP_VDD_MPU_ID 2 + /* XXX document */ #define VP_IDLE_TIMEOUT 200 #define VP_TRANXDONE_TIMEOUT 300 +/** + * struct omap_vp_ops - per-VP operations + * @check_txdone: check for VP transaction done + * @clear_txdone: clear VP transaction done status + */ +struct omap_vp_ops { + u32 (*check_txdone)(u8 vp_id); + void (*clear_txdone)(u8 vp_id); +}; /** - * struct omap_vp_common_data - register data common to all VDDs + * struct omap_vp_common - register data common to all VDDs + * @vpconfig_erroroffset_mask: ERROROFFSET bitmask in the PRM_VP*_CONFIG reg * @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg * @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg - * @vpconfig_timeouten_mask: TIMEOUT bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_timeouten: TIMEOUT bitmask in the PRM_VP*_CONFIG reg * @vpconfig_initvdd: INITVDD bitmask in the PRM_VP*_CONFIG reg * @vpconfig_forceupdate: FORCEUPDATE bitmask in the PRM_VP*_CONFIG reg * @vpconfig_vpenable: VPENABLE bitmask in the PRM_VP*_CONFIG reg * @vpconfig_erroroffset_shift: ERROROFFSET field shift in PRM_VP*_CONFIG reg * @vpconfig_errorgain_shift: ERRORGAIN field shift in PRM_VP*_CONFIG reg * @vpconfig_initvoltage_shift: INITVOLTAGE field shift in PRM_VP*_CONFIG reg - * @vpconfig_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg - * @vpconfig_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg - * @vpconfig_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg - * @vpconfig_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg - * @vpconfig_vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg - * @vpconfig_vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg - * @vpconfig_vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg - * - * XXX It it not necessary to have both a mask and a shift for the same - * bitfield - remove one - * XXX Many of these fields are wrongly named -- e.g., vpconfig_smps* -- fix! + * @vstepmin_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg + * @vstepmin_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg + * @vstepmax_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg + * @vstepmax_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg + * @vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg + * @vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg + * @vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg + * @vpvoltage_mask: VPVOLTAGE field mask in PRM_VP*_VOLTAGE reg */ -struct omap_vp_common_data { +struct omap_vp_common { + u32 vpconfig_erroroffset_mask; u32 vpconfig_errorgain_mask; u32 vpconfig_initvoltage_mask; - u32 vpconfig_timeouten; - u32 vpconfig_initvdd; - u32 vpconfig_forceupdate; - u32 vpconfig_vpenable; - u8 vpconfig_erroroffset_shift; - u8 vpconfig_errorgain_shift; - u8 vpconfig_initvoltage_shift; + u8 vpconfig_timeouten; + u8 vpconfig_initvdd; + u8 vpconfig_forceupdate; + u8 vpconfig_vpenable; u8 vstepmin_stepmin_shift; u8 vstepmin_smpswaittimemin_shift; u8 vstepmax_stepmax_shift; @@ -64,80 +80,49 @@ struct omap_vp_common_data { u8 vlimitto_vddmin_shift; u8 vlimitto_vddmax_shift; u8 vlimitto_timeout_shift; -}; + u8 vpvoltage_mask; -/** - * struct omap_vp_prm_irqst_data - PRM_IRQSTATUS_MPU.VP_TRANXDONE_ST data - * @prm_irqst_reg: reg offset for PRM_IRQSTATUS_MPU from top of PRM - * @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg - * - * XXX prm_irqst_reg does not belong here - * XXX Note that on OMAP3, VP_TRANXDONE interrupt may not work due to a - * hardware bug - * XXX This structure is probably not needed - */ -struct omap_vp_prm_irqst_data { - u8 prm_irqst_reg; - u32 tranxdone_status; + const struct omap_vp_ops *ops; }; /** - * struct omap_vp_instance_data - VP register offsets (per-VDD) - * @vp_common: pointer to struct omap_vp_common_data * for this SoC - * @prm_irqst_data: pointer to struct omap_vp_prm_irqst_data for this VDD + * struct omap_vp_instance - VP register offsets (per-VDD) + * @common: pointer to struct omap_vp_common * for this SoC * @vpconfig: PRM_VP*_CONFIG reg offset from PRM start * @vstepmin: PRM_VP*_VSTEPMIN reg offset from PRM start * @vlimitto: PRM_VP*_VLIMITTO reg offset from PRM start * @vstatus: PRM_VP*_VSTATUS reg offset from PRM start * @voltage: PRM_VP*_VOLTAGE reg offset from PRM start + * @id: Unique identifier for VP instance. + * @enabled: flag to keep track of whether vp is enabled or not * * XXX vp_common is probably not needed since it is per-SoC */ -struct omap_vp_instance_data { - const struct omap_vp_common_data *vp_common; - const struct omap_vp_prm_irqst_data *prm_irqst_data; +struct omap_vp_instance { + const struct omap_vp_common *common; u8 vpconfig; u8 vstepmin; u8 vstepmax; u8 vlimitto; u8 vstatus; u8 voltage; + u8 id; + bool enabled; }; -/** - * struct omap_vp_runtime_data - VP data populated at runtime by code - * @vpconfig_erroroffset: value of ERROROFFSET bitfield in PRM_VP*_CONFIG - * @vpconfig_errorgain: value of ERRORGAIN bitfield in PRM_VP*_CONFIG - * @vstepmin_smpswaittimemin: value of SMPSWAITTIMEMIN bitfield in PRM_VP*_VSTEPMIN - * @vstepmax_smpswaittimemax: value of SMPSWAITTIMEMAX bitfield in PRM_VP*_VSTEPMAX - * @vlimitto_timeout: value of TIMEOUT bitfield in PRM_VP*_VLIMITTO - * @vstepmin_stepmin: value of VSTEPMIN bitfield in PRM_VP*_VSTEPMIN - * @vstepmax_stepmax: value of VSTEPMAX bitfield in PRM_VP*_VSTEPMAX - * @vlimitto_vddmin: value of VDDMIN bitfield in PRM_VP*_VLIMITTO - * @vlimitto_vddmax: value of VDDMAX bitfield in PRM_VP*_VLIMITTO - * - * XXX Is this structure really needed? Why not just program the - * device directly? They are in PRM space, therefore in the WKUP - * powerdomain, so register contents should not be lost in off-mode. - * XXX Some of these fields are incorrectly named, e.g., vstep* - */ -struct omap_vp_runtime_data { - u32 vpconfig_erroroffset; - u16 vpconfig_errorgain; - u16 vstepmin_smpswaittimemin; - u16 vstepmax_smpswaittimemax; - u16 vlimitto_timeout; - u8 vstepmin_stepmin; - u8 vstepmax_stepmax; - u8 vlimitto_vddmin; - u8 vlimitto_vddmax; -}; +extern struct omap_vp_instance omap3_vp_mpu; +extern struct omap_vp_instance omap3_vp_core; -extern struct omap_vp_instance_data omap3_vp1_data; -extern struct omap_vp_instance_data omap3_vp2_data; +extern struct omap_vp_instance omap4_vp_mpu; +extern struct omap_vp_instance omap4_vp_iva; +extern struct omap_vp_instance omap4_vp_core; -extern struct omap_vp_instance_data omap4_vp_mpu_data; -extern struct omap_vp_instance_data omap4_vp_iva_data; -extern struct omap_vp_instance_data omap4_vp_core_data; +void omap_vp_init(struct voltagedomain *voltdm); +void omap_vp_enable(struct voltagedomain *voltdm); +void omap_vp_disable(struct voltagedomain *voltdm); +int omap_vp_forceupdate_scale(struct voltagedomain *voltdm, + unsigned long target_volt); +int omap_vp_update_errorgain(struct voltagedomain *voltdm, + unsigned long target_volt); #endif diff --git a/arch/arm/mach-omap2/vp3xxx_data.c b/arch/arm/mach-omap2/vp3xxx_data.c index 6452170..260c554 100644 --- a/arch/arm/mach-omap2/vp3xxx_data.c +++ b/arch/arm/mach-omap2/vp3xxx_data.c @@ -25,16 +25,20 @@ #include "voltage.h" #include "vp.h" +#include "prm2xxx_3xxx.h" + +static const struct omap_vp_ops omap3_vp_ops = { + .check_txdone = omap3_prm_vp_check_txdone, + .clear_txdone = omap3_prm_vp_clear_txdone, +}; /* * VP data common to 34xx/36xx chips * XXX This stuff presumably belongs in the vp3xxx.c or vp.c file. */ -static const struct omap_vp_common_data omap3_vp_common = { - .vpconfig_erroroffset_shift = OMAP3430_ERROROFFSET_SHIFT, +static const struct omap_vp_common omap3_vp_common = { + .vpconfig_erroroffset_mask = OMAP3430_ERROROFFSET_MASK, .vpconfig_errorgain_mask = OMAP3430_ERRORGAIN_MASK, - .vpconfig_errorgain_shift = OMAP3430_ERRORGAIN_SHIFT, - .vpconfig_initvoltage_shift = OMAP3430_INITVOLTAGE_SHIFT, .vpconfig_initvoltage_mask = OMAP3430_INITVOLTAGE_MASK, .vpconfig_timeouten = OMAP3430_TIMEOUTEN_MASK, .vpconfig_initvdd = OMAP3430_INITVDD_MASK, @@ -47,36 +51,29 @@ static const struct omap_vp_common_data omap3_vp_common = { .vlimitto_vddmin_shift = OMAP3430_VDDMIN_SHIFT, .vlimitto_vddmax_shift = OMAP3430_VDDMAX_SHIFT, .vlimitto_timeout_shift = OMAP3430_TIMEOUT_SHIFT, -}; + .vpvoltage_mask = OMAP3430_VPVOLTAGE_MASK, -static const struct omap_vp_prm_irqst_data omap3_vp1_prm_irqst_data = { - .prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET, - .tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK, + .ops = &omap3_vp_ops, }; -struct omap_vp_instance_data omap3_vp1_data = { - .vp_common = &omap3_vp_common, +struct omap_vp_instance omap3_vp_mpu = { + .id = OMAP3_VP_VDD_MPU_ID, + .common = &omap3_vp_common, .vpconfig = OMAP3_PRM_VP1_CONFIG_OFFSET, .vstepmin = OMAP3_PRM_VP1_VSTEPMIN_OFFSET, .vstepmax = OMAP3_PRM_VP1_VSTEPMAX_OFFSET, .vlimitto = OMAP3_PRM_VP1_VLIMITTO_OFFSET, .vstatus = OMAP3_PRM_VP1_STATUS_OFFSET, .voltage = OMAP3_PRM_VP1_VOLTAGE_OFFSET, - .prm_irqst_data = &omap3_vp1_prm_irqst_data, -}; - -static const struct omap_vp_prm_irqst_data omap3_vp2_prm_irqst_data = { - .prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET, - .tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK, }; -struct omap_vp_instance_data omap3_vp2_data = { - .vp_common = &omap3_vp_common, +struct omap_vp_instance omap3_vp_core = { + .id = OMAP3_VP_VDD_CORE_ID, + .common = &omap3_vp_common, .vpconfig = OMAP3_PRM_VP2_CONFIG_OFFSET, .vstepmin = OMAP3_PRM_VP2_VSTEPMIN_OFFSET, .vstepmax = OMAP3_PRM_VP2_VSTEPMAX_OFFSET, .vlimitto = OMAP3_PRM_VP2_VLIMITTO_OFFSET, .vstatus = OMAP3_PRM_VP2_STATUS_OFFSET, .voltage = OMAP3_PRM_VP2_VOLTAGE_OFFSET, - .prm_irqst_data = &omap3_vp2_prm_irqst_data, }; diff --git a/arch/arm/mach-omap2/vp44xx_data.c b/arch/arm/mach-omap2/vp44xx_data.c index 65d1ad6..b4e7704 100644 --- a/arch/arm/mach-omap2/vp44xx_data.c +++ b/arch/arm/mach-omap2/vp44xx_data.c @@ -27,15 +27,18 @@ #include "vp.h" +static const struct omap_vp_ops omap4_vp_ops = { + .check_txdone = omap4_prm_vp_check_txdone, + .clear_txdone = omap4_prm_vp_clear_txdone, +}; + /* * VP data common to 44xx chips * XXX This stuff presumably belongs in the vp44xx.c or vp.c file. */ -static const struct omap_vp_common_data omap4_vp_common = { - .vpconfig_erroroffset_shift = OMAP4430_ERROROFFSET_SHIFT, +static const struct omap_vp_common omap4_vp_common = { + .vpconfig_erroroffset_mask = OMAP4430_ERROROFFSET_MASK, .vpconfig_errorgain_mask = OMAP4430_ERRORGAIN_MASK, - .vpconfig_errorgain_shift = OMAP4430_ERRORGAIN_SHIFT, - .vpconfig_initvoltage_shift = OMAP4430_INITVOLTAGE_SHIFT, .vpconfig_initvoltage_mask = OMAP4430_INITVOLTAGE_MASK, .vpconfig_timeouten = OMAP4430_TIMEOUTEN_MASK, .vpconfig_initvdd = OMAP4430_INITVDD_MASK, @@ -48,53 +51,39 @@ static const struct omap_vp_common_data omap4_vp_common = { .vlimitto_vddmin_shift = OMAP4430_VDDMIN_SHIFT, .vlimitto_vddmax_shift = OMAP4430_VDDMAX_SHIFT, .vlimitto_timeout_shift = OMAP4430_TIMEOUT_SHIFT, + .vpvoltage_mask = OMAP4430_VPVOLTAGE_MASK, + .ops = &omap4_vp_ops, }; -static const struct omap_vp_prm_irqst_data omap4_vp_mpu_prm_irqst_data = { - .prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET, - .tranxdone_status = OMAP4430_VP_MPU_TRANXDONE_ST_MASK, -}; - -struct omap_vp_instance_data omap4_vp_mpu_data = { - .vp_common = &omap4_vp_common, +struct omap_vp_instance omap4_vp_mpu = { + .id = OMAP4_VP_VDD_MPU_ID, + .common = &omap4_vp_common, .vpconfig = OMAP4_PRM_VP_MPU_CONFIG_OFFSET, .vstepmin = OMAP4_PRM_VP_MPU_VSTEPMIN_OFFSET, .vstepmax = OMAP4_PRM_VP_MPU_VSTEPMAX_OFFSET, .vlimitto = OMAP4_PRM_VP_MPU_VLIMITTO_OFFSET, .vstatus = OMAP4_PRM_VP_MPU_STATUS_OFFSET, .voltage = OMAP4_PRM_VP_MPU_VOLTAGE_OFFSET, - .prm_irqst_data = &omap4_vp_mpu_prm_irqst_data, }; -static const struct omap_vp_prm_irqst_data omap4_vp_iva_prm_irqst_data = { - .prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET, - .tranxdone_status = OMAP4430_VP_IVA_TRANXDONE_ST_MASK, -}; - -struct omap_vp_instance_data omap4_vp_iva_data = { - .vp_common = &omap4_vp_common, +struct omap_vp_instance omap4_vp_iva = { + .id = OMAP4_VP_VDD_IVA_ID, + .common = &omap4_vp_common, .vpconfig = OMAP4_PRM_VP_IVA_CONFIG_OFFSET, .vstepmin = OMAP4_PRM_VP_IVA_VSTEPMIN_OFFSET, .vstepmax = OMAP4_PRM_VP_IVA_VSTEPMAX_OFFSET, .vlimitto = OMAP4_PRM_VP_IVA_VLIMITTO_OFFSET, .vstatus = OMAP4_PRM_VP_IVA_STATUS_OFFSET, .voltage = OMAP4_PRM_VP_IVA_VOLTAGE_OFFSET, - .prm_irqst_data = &omap4_vp_iva_prm_irqst_data, -}; - -static const struct omap_vp_prm_irqst_data omap4_vp_core_prm_irqst_data = { - .prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET, - .tranxdone_status = OMAP4430_VP_CORE_TRANXDONE_ST_MASK, }; -struct omap_vp_instance_data omap4_vp_core_data = { - .vp_common = &omap4_vp_common, +struct omap_vp_instance omap4_vp_core = { + .id = OMAP4_VP_VDD_CORE_ID, + .common = &omap4_vp_common, .vpconfig = OMAP4_PRM_VP_CORE_CONFIG_OFFSET, .vstepmin = OMAP4_PRM_VP_CORE_VSTEPMIN_OFFSET, .vstepmax = OMAP4_PRM_VP_CORE_VSTEPMAX_OFFSET, .vlimitto = OMAP4_PRM_VP_CORE_VLIMITTO_OFFSET, .vstatus = OMAP4_PRM_VP_CORE_STATUS_OFFSET, .voltage = OMAP4_PRM_VP_CORE_VOLTAGE_OFFSET, - .prm_irqst_data = &omap4_vp_core_prm_irqst_data, }; - diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h index 9115aed..5419f1a 100644 --- a/arch/arm/plat-omap/include/plat/omap_hwmod.h +++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h @@ -525,7 +525,6 @@ struct omap_hwmod { char *clkdm_name; struct clockdomain *clkdm; char *vdd_name; - struct voltagedomain *voltdm; struct omap_hwmod_ocp_if **masters; /* connect to *_IA */ struct omap_hwmod_ocp_if **slaves; /* connect to *_TA */ void *dev_attr; diff --git a/arch/arm/plat-omap/include/plat/voltage.h b/arch/arm/plat-omap/include/plat/voltage.h new file mode 100644 index 0000000..0a6a482 --- /dev/null +++ b/arch/arm/plat-omap/include/plat/voltage.h @@ -0,0 +1,20 @@ +/* + * OMAP Voltage Management Routines + * + * Copyright (C) 2011, Texas Instruments, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ARCH_ARM_OMAP_VOLTAGE_H +#define __ARCH_ARM_OMAP_VOLTAGE_H + +struct voltagedomain; + +struct voltagedomain *voltdm_lookup(const char *name); +int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt); +unsigned long voltdm_get_voltage(struct voltagedomain *voltdm); + +#endif |