/* * PCAP2 Regulator Driver * * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/mfd/ezx-pcap.h> static const u16 V1_table[] = { 2775, 1275, 1600, 1725, 1825, 1925, 2075, 2275, }; static const u16 V2_table[] = { 2500, 2775, }; static const u16 V3_table[] = { 1075, 1275, 1550, 1725, 1876, 1950, 2075, 2275, }; static const u16 V4_table[] = { 1275, 1550, 1725, 1875, 1950, 2075, 2275, 2775, }; static const u16 V5_table[] = { 1875, 2275, 2475, 2775, }; static const u16 V6_table[] = { 2475, 2775, }; static const u16 V7_table[] = { 1875, 2775, }; #define V8_table V4_table static const u16 V9_table[] = { 1575, 1875, 2475, 2775, }; static const u16 V10_table[] = { 5000, }; static const u16 VAUX1_table[] = { 1875, 2475, 2775, 3000, }; #define VAUX2_table VAUX1_table static const u16 VAUX3_table[] = { 1200, 1200, 1200, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000, 3200, 3400, 3600, }; static const u16 VAUX4_table[] = { 1800, 1800, 3000, 5000, }; static const u16 VSIM_table[] = { 1875, 3000, }; static const u16 VSIM2_table[] = { 1875, }; static const u16 VVIB_table[] = { 1300, 1800, 2000, 3000, }; static const u16 SW1_table[] = { 900, 950, 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500, 1600, 1875, 2250, }; #define SW2_table SW1_table static const u16 SW3_table[] = { 4000, 4500, 5000, 5500, }; struct pcap_regulator { const u8 reg; const u8 en; const u8 index; const u8 stby; const u8 lowpwr; const u8 n_voltages; const u16 *voltage_table; }; #define NA 0xff #define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr) \ [_vreg] = { \ .reg = _reg, \ .en = _en, \ .index = _index, \ .stby = _stby, \ .lowpwr = _lowpwr, \ .n_voltages = ARRAY_SIZE(_vreg##_table), \ .voltage_table = _vreg##_table, \ } static struct pcap_regulator vreg_table[] = { VREG_INFO(V1, PCAP_REG_VREG1, 1, 2, 18, 0), VREG_INFO(V2, PCAP_REG_VREG1, 5, 6, 19, 22), VREG_INFO(V3, PCAP_REG_VREG1, 7, 8, 20, 23), VREG_INFO(V4, PCAP_REG_VREG1, 11, 12, 21, 24), /* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */ VREG_INFO(V5, PCAP_REG_VREG1, 15, 16, 12, 19), VREG_INFO(V6, PCAP_REG_VREG2, 1, 2, 14, 20), VREG_INFO(V7, PCAP_REG_VREG2, 3, 4, 15, 21), VREG_INFO(V8, PCAP_REG_VREG2, 5, 6, 16, 22), VREG_INFO(V9, PCAP_REG_VREG2, 9, 10, 17, 23), VREG_INFO(V10, PCAP_REG_VREG2, 10, NA, 18, 24), VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1, 2, 22, 23), /* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */ VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4, 5, 0, 1), VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7, 8, 2, 3), VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4, 5), VREG_INFO(VSIM, PCAP_REG_AUXVREG, 17, 18, NA, 6), VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7), VREG_INFO(VVIB, PCAP_REG_AUXVREG, 19, 20, NA, NA), VREG_INFO(SW1, PCAP_REG_SWCTRL, 1, 2, NA, NA), VREG_INFO(SW2, PCAP_REG_SWCTRL, 6, 7, NA, NA), /* SW3 STBY is on PCAP_REG_AUXVREG */ VREG_INFO(SW3, PCAP_REG_SWCTRL, 11, 12, 24, NA), /* SWxS used to control SWx voltage on standby */ /* VREG_INFO(SW1S, PCAP_REG_LOWPWR, NA, 12, NA, NA), VREG_INFO(SW2S, PCAP_REG_LOWPWR, NA, 20, NA, NA), */ }; static int pcap_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; void *pcap = rdev_get_drvdata(rdev); int uV; u8 i; /* the regulator doesn't support voltage switching */ if (vreg->n_voltages == 1) return -EINVAL; for (i = 0; i < vreg->n_voltages; i++) { /* For V1 the first is not the best match */ if (i == 0 && rdev_get_id(rdev) == V1) i = 1; else if (i + 1 == vreg->n_voltages && rdev_get_id(rdev) == V1) i = 0; uV = vreg->voltage_table[i] * 1000; if (min_uV <= uV && uV <= max_uV) return ezx_pcap_set_bits(pcap, vreg->reg, (vreg->n_voltages - 1) << vreg->index, i << vreg->index); if (i == 0 && rdev_get_id(rdev) == V1) i = vreg->n_voltages - 1; } /* the requested voltage range is not supported by this regulator */ return -EINVAL; } static int pcap_regulator_get_voltage(struct regulator_dev *rdev) { struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; void *pcap = rdev_get_drvdata(rdev); u32 tmp; int mV; if (vreg->n_voltages == 1) return vreg->voltage_table[0] * 1000; ezx_pcap_read(pcap, vreg->reg, &tmp); tmp = ((tmp >> vreg->index) & (vreg->n_voltages - 1)); mV = vreg->voltage_table[tmp]; return mV * 1000; } static int pcap_regulator_enable(struct regulator_dev *rdev) { struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; void *pcap = rdev_get_drvdata(rdev); if (vreg->en == NA) return -EINVAL; return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en); } static int pcap_regulator_disable(struct regulator_dev *rdev) { struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; void *pcap = rdev_get_drvdata(rdev); if (vreg->en == NA) return -EINVAL; return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0); } static int pcap_regulator_is_enabled(struct regulator_dev *rdev) { struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; void *pcap = rdev_get_drvdata(rdev); u32 tmp; if (vreg->en == NA) return -EINVAL; ezx_pcap_read(pcap, vreg->reg, &tmp); return (tmp >> vreg->en) & 1; } static int pcap_regulator_list_voltage(struct regulator_dev *rdev, unsigned int index) { struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; return vreg->voltage_table[index] * 1000; } static struct regulator_ops pcap_regulator_ops = { .list_voltage = pcap_regulator_list_voltage, .set_voltage = pcap_regulator_set_voltage, .get_voltage = pcap_regulator_get_voltage, .enable = pcap_regulator_enable, .disable = pcap_regulator_disable, .is_enabled = pcap_regulator_is_enabled, }; #define VREG(_vreg) \ [_vreg] = { \ .name = #_vreg, \ .id = _vreg, \ .n_voltages = ARRAY_SIZE(_vreg##_table), \ .ops = &pcap_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ } static struct regulator_desc pcap_regulators[] = { VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7), VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3), VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2), }; static int __devinit pcap_regulator_probe(struct platform_device *pdev) { struct regulator_dev *rdev; void *pcap = dev_get_drvdata(pdev->dev.parent); rdev = regulator_register(&pcap_regulators[pdev->id], &pdev->dev, pdev->dev.platform_data, pcap); if (IS_ERR(rdev)) return PTR_ERR(rdev); platform_set_drvdata(pdev, rdev); return 0; } static int __devexit pcap_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); regulator_unregister(rdev); return 0; } static struct platform_driver pcap_regulator_driver = { .driver = { .name = "pcap-regulator", }, .probe = pcap_regulator_probe, .remove = __devexit_p(pcap_regulator_remove), }; static int __init pcap_regulator_init(void) { return platform_driver_register(&pcap_regulator_driver); } static void __exit pcap_regulator_exit(void) { platform_driver_unregister(&pcap_regulator_driver); } subsys_initcall(pcap_regulator_init); module_exit(pcap_regulator_exit); MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>"); MODULE_DESCRIPTION("PCAP2 Regulator Driver"); MODULE_LICENSE("GPL");