diff options
Diffstat (limited to 'drivers/regulator/arizona-ldo1.c')
| -rw-r--r-- | drivers/regulator/arizona-ldo1.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c new file mode 100644 index 000000000000..c8f95c07adb6 --- /dev/null +++ b/drivers/regulator/arizona-ldo1.c @@ -0,0 +1,138 @@ +/* + * arizona-ldo1.c -- LDO1 supply for Arizona devices + * + * Copyright 2012 Wolfson Microelectronics PLC. + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.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/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/gpio.h> +#include <linux/slab.h> + +#include <linux/mfd/arizona/core.h> +#include <linux/mfd/arizona/pdata.h> +#include <linux/mfd/arizona/registers.h> + +struct arizona_ldo1 { + struct regulator_dev *regulator; + struct arizona *arizona; + + struct regulator_consumer_supply supply; + struct regulator_init_data init_data; +}; + +static struct regulator_ops arizona_ldo1_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +static const struct regulator_desc arizona_ldo1 = { + .name = "LDO1", + .supply_name = "LDOVDD", + .type = REGULATOR_VOLTAGE, + .ops = &arizona_ldo1_ops, + + .vsel_reg = ARIZONA_LDO1_CONTROL_1, + .vsel_mask = ARIZONA_LDO1_VSEL_MASK, + .min_uV = 900000, + .uV_step = 50000, + .n_voltages = 7, + + .owner = THIS_MODULE, +}; + +static const struct regulator_init_data arizona_ldo1_default = { + .constraints = { + .valid_ops_mask = REGULATOR_CHANGE_STATUS, + }, + .num_consumer_supplies = 1, +}; + +static __devinit int arizona_ldo1_probe(struct platform_device *pdev) +{ + struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = { }; + struct arizona_ldo1 *ldo1; + int ret; + + ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); + if (ldo1 == NULL) { + dev_err(&pdev->dev, "Unable to allocate private data\n"); + return -ENOMEM; + } + + ldo1->arizona = arizona; + + /* + * Since the chip usually supplies itself we provide some + * default init_data for it. This will be overridden with + * platform data if provided. + */ + ldo1->init_data = arizona_ldo1_default; + ldo1->init_data.consumer_supplies = &ldo1->supply; + ldo1->supply.supply = "DCVDD"; + ldo1->supply.dev_name = dev_name(arizona->dev); + + config.dev = arizona->dev; + config.driver_data = ldo1; + config.regmap = arizona->regmap; + config.ena_gpio = arizona->pdata.ldoena; + + if (arizona->pdata.ldo1) + config.init_data = arizona->pdata.ldo1; + else + config.init_data = &ldo1->init_data; + + ldo1->regulator = regulator_register(&arizona_ldo1, &config); + if (IS_ERR(ldo1->regulator)) { + ret = PTR_ERR(ldo1->regulator); + dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n", + ret); + return ret; + } + + platform_set_drvdata(pdev, ldo1); + + return 0; +} + +static __devexit int arizona_ldo1_remove(struct platform_device *pdev) +{ + struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev); + + regulator_unregister(ldo1->regulator); + + return 0; +} + +static struct platform_driver arizona_ldo1_driver = { + .probe = arizona_ldo1_probe, + .remove = __devexit_p(arizona_ldo1_remove), + .driver = { + .name = "arizona-ldo1", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(arizona_ldo1_driver); + +/* Module information */ +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_DESCRIPTION("Arizona LDO1 driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:arizona-ldo1"); |