From 423644c578e2e56bbdd2b6e9d08dfbe406a8f53f Mon Sep 17 00:00:00 2001 From: Balaji Rao Date: Thu, 20 Nov 2008 19:46:49 +0000 Subject: pcf50633_use_regulator_api.patch Modify pcf50633 driver to use the new regulator API. --- drivers/regulator/Kconfig | 4 + drivers/regulator/Makefile | 1 + drivers/regulator/pcf50633-regulator.c | 306 +++++++++++++++++++++++++++++++++ 3 files changed, 311 insertions(+) create mode 100644 drivers/regulator/pcf50633-regulator.c (limited to 'drivers/regulator') diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 39360e2a454..607b7937592 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -73,4 +73,8 @@ config REGULATOR_DA903X Say y here to support the BUCKs and LDOs regulators found on Dialog Semiconductor DA9030/DA9034 PMIC. +config REGULATOR_PCF50633 + bool "PCF50633 regulator driver" + depends on SENSORS_PCF50633 + endif diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 254d40c02ee..82e77c11a47 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -11,5 +11,6 @@ obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o obj-$(CONFIG_REGULATOR_DA903X) += da903x.o +obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG diff --git a/drivers/regulator/pcf50633-regulator.c b/drivers/regulator/pcf50633-regulator.c new file mode 100644 index 00000000000..371d02f9824 --- /dev/null +++ b/drivers/regulator/pcf50633-regulator.c @@ -0,0 +1,306 @@ +/* + * Regulator driver for pcf50633 + */ + +#include +#include +#include +#include + +#define PCF50633_REGULATOR(_name, _id) \ + { \ + .name = _name, \ + .id = _id, \ + .ops = &pcf50633_regulator_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + } + +static const u_int8_t regulator_registers[__NUM_PCF50633_REGULATORS] = { + [PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT, + [PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT, + [PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT, + [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT, + [PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT, + [PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT, + [PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT, + [PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT, + [PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT, + [PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT, + [PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT, +}; + +/* Bits from voltage value */ +static u_int8_t auto_voltage_bits(unsigned int millivolts) +{ + if (millivolts < 1800) + return 0; + if (millivolts > 3800) + return 0xff; + + millivolts -= 625; + return millivolts/25; +} + +static u_int8_t down_voltage_bits(unsigned int millivolts) +{ + if (millivolts < 625) + return 0; + else if (millivolts > 3000) + return 0xff; + + millivolts -= 625; + return millivolts/25; +} + +static u_int8_t ldo_voltage_bits(unsigned int millivolts) +{ + if (millivolts < 900) + return 0; + else if (millivolts > 3600) + return 0x1f; + + millivolts -= 900; + return millivolts/100; +} + +/* Obtain voltage value from bits */ + +static unsigned int auto_voltage_value(uint8_t bits) +{ + if (bits < 0x2f) + return 0; + return 625 + (bits * 25); +} + + +static unsigned int down_voltage_value(uint8_t bits) +{ + return 625 + (bits*25); +} + + +static unsigned int ldo_voltage_value(uint8_t bits) +{ + bits &= 0x1f; + return 900 + (bits * 100); +} + +static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + uint8_t volt_bits; + uint8_t regnr; + int regulator_id; + int millivolts; + struct pcf50633_data *pcf = rdev_get_drvdata(rdev);; + + regulator_id = rdev_get_id(rdev); + + if (regulator_id >= __NUM_PCF50633_REGULATORS) + return -EINVAL; + + millivolts = min_uV / 1000; + + regnr = regulator_registers[regulator_id]; + + switch (regulator_id) { + case PCF50633_REGULATOR_AUTO: + volt_bits = auto_voltage_bits(millivolts); + break; + case PCF50633_REGULATOR_DOWN1: + volt_bits = down_voltage_bits(millivolts); + break; + case PCF50633_REGULATOR_DOWN2: + volt_bits = down_voltage_bits(millivolts); + break; + case PCF50633_REGULATOR_LDO1: + case PCF50633_REGULATOR_LDO2: + case PCF50633_REGULATOR_LDO3: + case PCF50633_REGULATOR_LDO4: + case PCF50633_REGULATOR_LDO5: + case PCF50633_REGULATOR_LDO6: + case PCF50633_REGULATOR_HCLDO: + volt_bits = ldo_voltage_bits(millivolts); + break; + default: + return -EINVAL; + } + + return pcf50633_reg_write(pcf, regnr, volt_bits); +} + +static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev) +{ + uint8_t volt_bits; + uint8_t regnr; + unsigned int rc = 0; + int regulator_id = rdev_get_id(rdev); + struct pcf50633_data *pcf = rdev_get_drvdata(rdev); + + if (regulator_id >= __NUM_PCF50633_REGULATORS) + return -EINVAL; + + regnr = regulator_registers[regulator_id]; + volt_bits = pcf50633_reg_read(pcf, regnr); + + switch (regulator_id) { + case PCF50633_REGULATOR_AUTO: + rc = auto_voltage_value(volt_bits); + break; + case PCF50633_REGULATOR_DOWN1: + rc = down_voltage_value(volt_bits); + break; + case PCF50633_REGULATOR_DOWN2: + rc = down_voltage_value(volt_bits); + break; + case PCF50633_REGULATOR_LDO1: + case PCF50633_REGULATOR_LDO2: + case PCF50633_REGULATOR_LDO3: + case PCF50633_REGULATOR_LDO4: + case PCF50633_REGULATOR_LDO5: + case PCF50633_REGULATOR_LDO6: + case PCF50633_REGULATOR_HCLDO: + rc = ldo_voltage_value(volt_bits); + break; + default: + return -EINVAL; + } + + return rc; +} + +static int pcf50633_regulator_enable(struct regulator_dev *rdev) +{ + uint8_t regnr; + int regulator_id = rdev_get_id(rdev); + struct pcf50633_data *pcf = rdev_get_drvdata(rdev); + + if (regulator_id >= __NUM_PCF50633_REGULATORS) + return -EINVAL; + + /* the *ENA register is always one after the *OUT register */ + regnr = regulator_registers[regulator_id] + 1; + + pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON, + PCF50633_REGULATOR_ON); + + return 0; +} + +static int pcf50633_regulator_disable(struct regulator_dev *rdev) +{ + uint8_t regnr; + int regulator_id = rdev_get_id(rdev); + struct pcf50633_data *pcf = rdev_get_drvdata(rdev); + + if (regulator_id >= __NUM_PCF50633_REGULATORS) + return -EINVAL; + + /* the *ENA register is always one after the *OUT register */ + regnr = regulator_registers[regulator_id] + 1; + + pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON, 0); + + return 0; +} + +static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev) +{ + uint8_t val, regnr; + int regulator_id = rdev_get_id(rdev); + struct pcf50633_data *pcf = rdev_get_drvdata(rdev);; + + if (regulator_id >= __NUM_PCF50633_REGULATORS) + return -EINVAL; + + /* the *ENA register is always one after the *OUT register */ + regnr = regulator_registers[regulator_id] + 1; + val = pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON; + + return val; +} + +struct regulator_ops pcf50633_regulator_ops = { + .set_voltage = pcf50633_regulator_set_voltage, + .get_voltage = pcf50633_regulator_get_voltage, + .enable = pcf50633_regulator_enable, + .disable = pcf50633_regulator_disable, + .is_enabled = pcf50633_regulator_is_enabled, +}; + +struct regulator_desc regulators[] = { + [PCF50633_REGULATOR_AUTO] = + PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO), + [PCF50633_REGULATOR_DOWN1] = + PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1), + [PCF50633_REGULATOR_DOWN2] = + PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2), + [PCF50633_REGULATOR_LDO1] = + PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1), + [PCF50633_REGULATOR_LDO2] = + PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2), + [PCF50633_REGULATOR_LDO3] = + PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3), + [PCF50633_REGULATOR_LDO4] = + PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4), + [PCF50633_REGULATOR_LDO5] = + PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5), + [PCF50633_REGULATOR_LDO6] = + PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6), + [PCF50633_REGULATOR_HCLDO] = + PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO), + [PCF50633_REGULATOR_MEMLDO] = + PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO), +}; + +int __init pcf50633_regulator_probe(struct platform_device *pdev) +{ + struct regulator_dev *rdev; + struct pcf50633_data *pcf; + + pcf = pdev->dev.driver_data; + + rdev = regulator_register(®ulators[pdev->id], &pdev->dev, pcf); + if (IS_ERR(rdev)) + return PTR_ERR(rdev); + + if (pcf->pdata->regulator_registered) + pcf->pdata->regulator_registered(pdev->id); + + return 0; +} + +static int __devexit pcf50633_regulator_remove(struct platform_device *pdev) +{ + struct regulator_dev *rdev = platform_get_drvdata(pdev); + + regulator_unregister(rdev); + + return 0; +} + +struct platform_driver pcf50633_regulator_driver = { + .driver = { + .name = "pcf50633-regltr", + }, + .probe = pcf50633_regulator_probe, + .remove = __devexit_p(pcf50633_regulator_remove), +}; + +static int __init pcf50633_regulator_init(void) +{ + return platform_driver_register(&pcf50633_regulator_driver); +} +module_init(pcf50633_regulator_init); + +static void __exit pcf50633_regulator_exit(void) +{ + platform_driver_unregister(&pcf50633_regulator_driver); +} +module_exit(pcf50633_regulator_exit); + +MODULE_AUTHOR("Balaji Rao "); +MODULE_DESCRIPTION("PCF50633 regulator driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pcf50633-regulator"); -- cgit v1.2.3