/* * arch/arm/mach-u300/i2c.c * * Copyright (C) 2009 ST-Ericsson AB * License terms: GNU General Public License (GPL) version 2 * * Register board i2c devices * Author: Linus Walleij <linus.walleij@stericsson.com> */ #include <linux/kernel.h> #include <linux/i2c.h> #include <linux/mfd/ab3100.h> #include <linux/regulator/machine.h> #include <linux/amba/bus.h> #include <mach/irqs.h> /* * Initial settings of ab3100 registers. * Common for below LDO regulator settings are that * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0). * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode. */ /* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */ #define LDO_A_SETTING 0x16 /* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */ #define LDO_C_SETTING 0x10 /* LDO_D 0x10: 2.65V, ON, sleep mode not used */ #define LDO_D_SETTING 0x10 /* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */ #define LDO_E_SETTING 0x10 /* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */ #define LDO_E_SLEEP_SETTING 0x00 /* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */ #define LDO_F_SETTING 0xD0 /* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */ #define LDO_G_SETTING 0x00 /* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */ #define LDO_H_SETTING 0x18 /* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */ #define LDO_K_SETTING 0x00 /* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */ #define LDO_EXT_SETTING 0x00 /* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */ #define BUCK_SETTING 0x7D /* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */ #define BUCK_SLEEP_SETTING 0xAC static struct regulator_consumer_supply supply_ldo_c[] = { { .dev_name = "ab3100-codec", .supply = "vaudio", /* Powers the codec */ }, }; /* * This one needs to be a supply so we can turn it off * in order to shut down the system. */ static struct regulator_consumer_supply supply_ldo_d[] = { { .dev = NULL, .supply = "vana15", /* Powers the SoC (CPU etc) */ }, }; static struct regulator_consumer_supply supply_ldo_g[] = { { .dev_name = "mmci", .supply = "vmmc", /* Powers MMC/SD card */ }, }; static struct regulator_consumer_supply supply_ldo_h[] = { { .dev_name = "xgam_pdi", .supply = "vdisp", /* Powers camera, display etc */ }, }; static struct regulator_consumer_supply supply_ldo_k[] = { { .dev_name = "irda", .supply = "vir", /* Power IrDA */ }, }; /* * This is a placeholder for whoever wish to use the * external power. */ static struct regulator_consumer_supply supply_ldo_ext[] = { { .dev = NULL, .supply = "vext", /* External power */ }, }; /* Preset (hardware defined) voltages for these regulators */ #define LDO_A_VOLTAGE 2750000 #define LDO_C_VOLTAGE 2650000 #define LDO_D_VOLTAGE 2650000 static struct ab3100_platform_data ab3100_plf_data = { .reg_constraints = { /* LDO A routing and constraints */ { .constraints = { .name = "vrad", .min_uV = LDO_A_VOLTAGE, .max_uV = LDO_A_VOLTAGE, .valid_modes_mask = REGULATOR_MODE_NORMAL, .always_on = 1, .boot_on = 1, }, }, /* LDO C routing and constraints */ { .constraints = { .min_uV = LDO_C_VOLTAGE, .max_uV = LDO_C_VOLTAGE, .valid_modes_mask = REGULATOR_MODE_NORMAL, }, .num_consumer_supplies = ARRAY_SIZE(supply_ldo_c), .consumer_supplies = supply_ldo_c, }, /* LDO D routing and constraints */ { .constraints = { .min_uV = LDO_D_VOLTAGE, .max_uV = LDO_D_VOLTAGE, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_STATUS, /* * Actually this is boot_on but we need * to reference count it externally to * be able to shut down the system. */ }, .num_consumer_supplies = ARRAY_SIZE(supply_ldo_d), .consumer_supplies = supply_ldo_d, }, /* LDO E routing and constraints */ { .constraints = { .name = "vio", .min_uV = 1800000, .max_uV = 1800000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS, .always_on = 1, .boot_on = 1, }, }, /* LDO F routing and constraints */ { .constraints = { .name = "vana25", .min_uV = 2500000, .max_uV = 2500000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS, .always_on = 1, .boot_on = 1, }, }, /* LDO G routing and constraints */ { .constraints = { .min_uV = 1500000, .max_uV = 2850000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS, }, .num_consumer_supplies = ARRAY_SIZE(supply_ldo_g), .consumer_supplies = supply_ldo_g, }, /* LDO H routing and constraints */ { .constraints = { .min_uV = 1200000, .max_uV = 2750000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS, }, .num_consumer_supplies = ARRAY_SIZE(supply_ldo_h), .consumer_supplies = supply_ldo_h, }, /* LDO K routing and constraints */ { .constraints = { .min_uV = 1800000, .max_uV = 2750000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS, }, .num_consumer_supplies = ARRAY_SIZE(supply_ldo_k), .consumer_supplies = supply_ldo_k, }, /* External regulator interface. No fixed voltage specified. * If we knew the voltage of the external regulator and it * was connected on the board, we could add the (fixed) * voltage for it here. */ { .constraints = { .min_uV = 0, .max_uV = 0, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_STATUS, }, .num_consumer_supplies = ARRAY_SIZE(supply_ldo_ext), .consumer_supplies = supply_ldo_ext, }, /* Buck converter routing and constraints */ { .constraints = { .name = "vcore", .min_uV = 1200000, .max_uV = 1800000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_STATUS, .always_on = 1, .boot_on = 1, }, }, }, .reg_initvals = { LDO_A_SETTING, LDO_C_SETTING, LDO_E_SETTING, LDO_E_SLEEP_SETTING, LDO_F_SETTING, LDO_G_SETTING, LDO_H_SETTING, LDO_K_SETTING, LDO_EXT_SETTING, BUCK_SETTING, BUCK_SLEEP_SETTING, LDO_D_SETTING, }, }; static struct i2c_board_info __initdata bus0_i2c_board_info[] = { { .type = "ab3100", .addr = 0x48, .irq = IRQ_U300_IRQ0_EXT, .platform_data = &ab3100_plf_data, }, }; static struct i2c_board_info __initdata bus1_i2c_board_info[] = { #ifdef CONFIG_MACH_U300_BS335 { .type = "fwcam", .addr = 0x10, }, { .type = "fwcam", .addr = 0x5d, }, #else { }, #endif }; void __init u300_i2c_register_board_devices(void) { i2c_register_board_info(0, bus0_i2c_board_info, ARRAY_SIZE(bus0_i2c_board_info)); /* * This makes the core shut down all unused regulators * after all the initcalls have completed. */ regulator_has_full_constraints(); i2c_register_board_info(1, bus1_i2c_board_info, ARRAY_SIZE(bus1_i2c_board_info)); }