diff options
| -rw-r--r-- | drivers/regulator/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/regulator/Makefile | 1 | ||||
| -rw-r--r-- | drivers/regulator/max8907c-regulator.c | 416 | ||||
| -rw-r--r-- | include/linux/regulator/max8907c-regulator.h | 46 |
4 files changed, 471 insertions, 0 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index c7fd2c0e3f2b..39db573bc566 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -125,6 +125,14 @@ config REGULATOR_MAX8998 via I2C bus. The provided regulator is suitable for S3C6410 and S5PC1XX chips to control VCC_CORE and VCC_USIM voltages. +config REGULATOR_MAX8907C + tristate "Maxim 8907C voltage regulator" + depends on MFD_MAX8907C + help + This driver controls a Maxim 8907C voltage output regulator + via I2C bus. The provided regulator is suitable for Tegra + chip to control Step-Down DC-DC and LDOs. + config REGULATOR_TWL4030 bool "TI TWL4030/TWL5030/TWL6030/TPS659x0 PMIC" depends on TWL4030_CORE diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 040d5aa63535..d7610f5f93a9 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o +obj-$(CONFIG_REGULATOR_MAX8907C) += max8907c-regulator.o obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o diff --git a/drivers/regulator/max8907c-regulator.c b/drivers/regulator/max8907c-regulator.c new file mode 100644 index 000000000000..fc3087670164 --- /dev/null +++ b/drivers/regulator/max8907c-regulator.c @@ -0,0 +1,416 @@ +/* + * max8907c-regulator.c -- support regulators in max8907c + * + * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com> + * + * 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/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/mfd/max8907c.h> +#include <linux/regulator/max8907c-regulator.h> + +#define MAX8907C_REGULATOR_CNT (ARRAY_SIZE(max8907c_regulators)) + +struct max8907c_regulator_info { + u32 min_uV; + u32 max_uV; + u32 step_uV; + u8 reg_base; + struct regulator_desc desc; +}; + +#define REG_LDO(ids, base, min, max, step) \ + { \ + .min_uV = (min), \ + .max_uV = (max), \ + .step_uV = (step), \ + .reg_base = (base), \ + .desc = { \ + .name = #ids, \ + .id = MAX8907C_##ids, \ + .n_voltages = ((max) - (min)) / (step) + 1, \ + .ops = &max8907c_ldo_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +#define REG_FIXED(ids, voltage) \ + { \ + .min_uV = (voltage), \ + .max_uV = (voltage), \ + .desc = { \ + .name = #ids, \ + .id = MAX8907C_##ids, \ + .n_voltages = 1, \ + .ops = &max8907c_fixed_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +#define REG_OUT5V(ids, base, voltage) \ + { \ + .min_uV = (voltage), \ + .max_uV = (voltage), \ + .reg_base = (base), \ + .desc = { \ + .name = #ids, \ + .id = MAX8907C_##ids, \ + .n_voltages = 1, \ + .ops = &max8907c_out5v_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +#define REG_BBAT(ids, base, min, max, step) \ + { \ + .min_uV = (min), \ + .max_uV = (max), \ + .step_uV = (step), \ + .reg_base = (base), \ + .desc = { \ + .name = #ids, \ + .id = MAX8907C_##ids, \ + .n_voltages = ((max) - (min)) / (step) + 1, \ + .ops = &max8907c_bbat_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +#define REG_WLED(ids, base, voltage) \ + { \ + .min_uV = (voltage), \ + .max_uV = (voltage), \ + .reg_base = (base), \ + .desc = { \ + .name = #ids, \ + .id = MAX8907C_##ids, \ + .n_voltages = 1, \ + .ops = &max8907c_wled_ops, \ + .type = REGULATOR_CURRENT, \ + .owner = THIS_MODULE, \ + }, \ + } + +#define LDO_750_50(id, base) REG_LDO(id, (base), 750000, 3900000, 50000) +#define LDO_650_25(id, base) REG_LDO(id, (base), 650000, 2225000, 25000) + +static int max8907c_regulator_list_voltage(struct regulator_dev *dev, + unsigned index); +static int max8907c_regulator_ldo_set_voltage(struct regulator_dev *dev, + int min_uV, int max_uV); +static int max8907c_regulator_bbat_set_voltage(struct regulator_dev *dev, + int min_uV, int max_uV); +static int max8907c_regulator_ldo_get_voltage(struct regulator_dev *dev); +static int max8907c_regulator_fixed_get_voltage(struct regulator_dev *dev); +static int max8907c_regulator_bbat_get_voltage(struct regulator_dev *dev); +static int max8907c_regulator_wled_set_current_limit(struct regulator_dev *dev, + int min_uA, int max_uA); +static int max8907c_regulator_wled_get_current_limit(struct regulator_dev *dev); +static int max8907c_regulator_ldo_enable(struct regulator_dev *dev); +static int max8907c_regulator_out5v_enable(struct regulator_dev *dev); +static int max8907c_regulator_ldo_disable(struct regulator_dev *dev); +static int max8907c_regulator_out5v_disable(struct regulator_dev *dev); +static int max8907c_regulator_ldo_is_enabled(struct regulator_dev *dev); +static int max8907c_regulator_out5v_is_enabled(struct regulator_dev *dev); + +static struct regulator_ops max8907c_ldo_ops = { + .list_voltage = max8907c_regulator_list_voltage, + .set_voltage = max8907c_regulator_ldo_set_voltage, + .get_voltage = max8907c_regulator_ldo_get_voltage, + .enable = max8907c_regulator_ldo_enable, + .disable = max8907c_regulator_ldo_disable, + .is_enabled = max8907c_regulator_ldo_is_enabled, +}; + +static struct regulator_ops max8907c_fixed_ops = { + .list_voltage = max8907c_regulator_list_voltage, + .get_voltage = max8907c_regulator_fixed_get_voltage, +}; + +static struct regulator_ops max8907c_out5v_ops = { + .list_voltage = max8907c_regulator_list_voltage, + .get_voltage = max8907c_regulator_fixed_get_voltage, + .enable = max8907c_regulator_out5v_enable, + .disable = max8907c_regulator_out5v_disable, + .is_enabled = max8907c_regulator_out5v_is_enabled, +}; + +static struct regulator_ops max8907c_bbat_ops = { + .list_voltage = max8907c_regulator_list_voltage, + .set_voltage = max8907c_regulator_bbat_set_voltage, + .get_voltage = max8907c_regulator_bbat_get_voltage, +}; + +static struct regulator_ops max8907c_wled_ops = { + .list_voltage = max8907c_regulator_list_voltage, + .set_current_limit = max8907c_regulator_wled_set_current_limit, + .get_current_limit = max8907c_regulator_wled_get_current_limit, + .get_voltage = max8907c_regulator_fixed_get_voltage, +}; + +static struct max8907c_regulator_info max8907c_regulators[] = { + REG_LDO(SD1, MAX8907C_REG_SDCTL1, 650000, 2225000, 25000), + REG_LDO(SD2, MAX8907C_REG_SDCTL2, 637500, 1425000, 12500), + REG_LDO(SD3, MAX8907C_REG_SDCTL3, 750000, 3900000, 50000), + LDO_750_50(LDO1, MAX8907C_REG_LDOCTL1), + LDO_650_25(LDO2, MAX8907C_REG_LDOCTL2), + LDO_650_25(LDO3, MAX8907C_REG_LDOCTL3), + LDO_750_50(LDO4, MAX8907C_REG_LDOCTL4), + LDO_750_50(LDO5, MAX8907C_REG_LDOCTL5), + LDO_750_50(LDO6, MAX8907C_REG_LDOCTL6), + LDO_750_50(LDO7, MAX8907C_REG_LDOCTL7), + LDO_750_50(LDO8, MAX8907C_REG_LDOCTL8), + LDO_750_50(LDO9, MAX8907C_REG_LDOCTL9), + LDO_750_50(LDO10, MAX8907C_REG_LDOCTL10), + LDO_750_50(LDO11, MAX8907C_REG_LDOCTL11), + LDO_750_50(LDO12, MAX8907C_REG_LDOCTL12), + LDO_750_50(LDO13, MAX8907C_REG_LDOCTL13), + LDO_750_50(LDO14, MAX8907C_REG_LDOCTL14), + LDO_750_50(LDO15, MAX8907C_REG_LDOCTL15), + LDO_750_50(LDO16, MAX8907C_REG_LDOCTL16), + LDO_650_25(LDO17, MAX8907C_REG_LDOCTL17), + LDO_650_25(LDO18, MAX8907C_REG_LDOCTL18), + LDO_750_50(LDO19, MAX8907C_REG_LDOCTL19), + LDO_750_50(LDO20, MAX8907C_REG_LDOCTL20), + REG_OUT5V(OUT5V, MAX8907C_REG_OUT5VEN, 5000000), + REG_OUT5V(OUT33V, MAX8907C_REG_OUT33VEN, 3300000), + REG_BBAT(BBAT, MAX8907C_REG_BBAT_CNFG, 2400000, 3000000, 200000), + REG_FIXED(SDBY, 1200000), + REG_FIXED(VRTC, 3300000), + REG_WLED(WLED, MAX8907C_REG_ILED_CNTL, 0), +}; + +static int max8907c_regulator_list_voltage(struct regulator_dev *rdev, + unsigned index) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + + return info->min_uV + info->step_uV * index; +} + +static int max8907c_regulator_ldo_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + if (min_uV < info->min_uV || max_uV > info->max_uV) + return -EDOM; + + val = (min_uV - info->min_uV) / info->step_uV; + + return max8907c_reg_write(parent, info->reg_base + MAX8907C_VOUT, val); +} + +static int max8907c_regulator_bbat_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + if (min_uV < info->min_uV || max_uV > info->max_uV) + return -EDOM; + + val = (min_uV - info->min_uV) / info->step_uV; + + return max8907c_set_bits(parent, info->reg_base, MAX8907C_MASK_VBBATTCV, + val); +} + +static int max8907c_regulator_ldo_get_voltage(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + val = max8907c_reg_read(parent, info->reg_base + MAX8907C_VOUT); + return val * info->step_uV + info->min_uV; +} + +static int max8907c_regulator_fixed_get_voltage(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + + return info->min_uV; +} + +static int max8907c_regulator_bbat_get_voltage(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + val = + max8907c_reg_read(parent, info->reg_base) & MAX8907C_MASK_VBBATTCV; + return val * info->step_uV + info->min_uV; +} + +static int max8907c_regulator_wled_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + + if (min_uA > 25500) + return -EDOM; + + return max8907c_reg_write(parent, info->reg_base, min_uA / 100); +} + +static int max8907c_regulator_wled_get_current_limit(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + val = max8907c_reg_read(parent, info->reg_base); + return val * 100; +} + +static int max8907c_regulator_ldo_enable(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + + return max8907c_set_bits(parent, info->reg_base + MAX8907C_CTL, + MAX8907C_MASK_LDO_EN | MAX8907C_MASK_LDO_SEQ, + MAX8907C_MASK_LDO_EN | MAX8907C_MASK_LDO_SEQ); +} + +static int max8907c_regulator_out5v_enable(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + + return max8907c_set_bits(parent, info->reg_base, + MAX8907C_MASK_OUT5V_VINEN | + MAX8907C_MASK_OUT5V_ENSRC | + MAX8907C_MASK_OUT5V_EN, + MAX8907C_MASK_OUT5V_ENSRC | + MAX8907C_MASK_OUT5V_EN); +} + +static int max8907c_regulator_ldo_disable(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + + return max8907c_set_bits(parent, info->reg_base + MAX8907C_CTL, + MAX8907C_MASK_LDO_EN | MAX8907C_MASK_LDO_SEQ, + MAX8907C_MASK_LDO_SEQ); +} + +static int max8907c_regulator_out5v_disable(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + + return max8907c_set_bits(parent, info->reg_base, + MAX8907C_MASK_OUT5V_VINEN | + MAX8907C_MASK_OUT5V_ENSRC | + MAX8907C_MASK_OUT5V_EN, + MAX8907C_MASK_OUT5V_ENSRC); +} + +static int max8907c_regulator_ldo_is_enabled(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + val = max8907c_reg_read(parent, info->reg_base + MAX8907C_CTL); + if (val < 0) + return -EDOM; + + return (val & MAX8907C_MASK_LDO_EN) || !(val & MAX8907C_MASK_LDO_SEQ); +} + +static int max8907c_regulator_out5v_is_enabled(struct regulator_dev *rdev) +{ + const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev); + struct device *parent = rdev_get_dev(rdev)->parent->parent; + int val; + + val = max8907c_reg_read(parent, info->reg_base); + if (val < 0) + return -EDOM; + + if ((val & + (MAX8907C_MASK_OUT5V_VINEN | MAX8907C_MASK_OUT5V_ENSRC | + MAX8907C_MASK_OUT5V_EN)) + == MAX8907C_MASK_OUT5V_ENSRC) + return 1; + + return 0; +} + +static int max8907c_regulator_probe(struct platform_device *pdev) +{ + struct max8907c_regulator_info *info; + struct regulator_dev *rdev; + + info = &max8907c_regulators[pdev->id]; + + rdev = regulator_register(&info->desc, + &pdev->dev, pdev->dev.platform_data, info); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "Cannot register regulator \"%s\", %ld\n", + info->desc.name, PTR_ERR(rdev)); + goto error; + } + + platform_set_drvdata(pdev, rdev); + return 0; + +error: + return PTR_ERR(rdev); +} + +static int max8907c_regulator_remove(struct platform_device *pdev) +{ + struct regulator_dev *rdev = platform_get_drvdata(pdev); + + regulator_unregister(rdev); + return 0; +} + +static struct platform_driver max8907c_regulator_driver = { + .driver = { + .name = "max8907c-regulator", + .owner = THIS_MODULE, + }, + .probe = max8907c_regulator_probe, + .remove = __devexit_p(max8907c_regulator_remove), +}; + +static int __init max8907c_regulator_init(void) +{ + return platform_driver_register(&max8907c_regulator_driver); +} + +subsys_initcall(max8907c_regulator_init); + +static void __exit max8907c_reg_exit(void) +{ + platform_driver_unregister(&max8907c_regulator_driver); +} + +module_exit(max8907c_reg_exit); + +MODULE_DESCRIPTION("MAX8907C regulator driver"); +MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/regulator/max8907c-regulator.h b/include/linux/regulator/max8907c-regulator.h new file mode 100644 index 000000000000..ddc5f0a60339 --- /dev/null +++ b/include/linux/regulator/max8907c-regulator.h @@ -0,0 +1,46 @@ +/* linux/regulator/max8907c-regulator.h + * + * Functions to access MAX8907C power management chip. + * + * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com> + * + * 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 __LINUX_REGULATOR_MAX8907C_H +#define __LINUX_REGULATOR_MAX8907C_H + +/* IDs */ +#define MAX8907C_SD1 0 +#define MAX8907C_SD2 1 +#define MAX8907C_SD3 2 +#define MAX8907C_LDO1 3 +#define MAX8907C_LDO2 4 +#define MAX8907C_LDO3 5 +#define MAX8907C_LDO4 6 +#define MAX8907C_LDO5 7 +#define MAX8907C_LDO6 8 +#define MAX8907C_LDO7 9 +#define MAX8907C_LDO8 10 +#define MAX8907C_LDO9 11 +#define MAX8907C_LDO10 12 +#define MAX8907C_LDO11 13 +#define MAX8907C_LDO12 14 +#define MAX8907C_LDO13 15 +#define MAX8907C_LDO14 16 +#define MAX8907C_LDO15 17 +#define MAX8907C_LDO16 18 +#define MAX8907C_LDO17 19 +#define MAX8907C_LDO18 20 +#define MAX8907C_LDO19 21 +#define MAX8907C_LDO20 22 +#define MAX8907C_OUT5V 23 +#define MAX8907C_OUT33V 24 +#define MAX8907C_BBAT 25 +#define MAX8907C_SDBY 26 +#define MAX8907C_VRTC 27 +#define MAX8907C_WLED 27 + +#endif |