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/*
* 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,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = regulator_set_bypass_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,
.bypass_reg = ARIZONA_LDO1_CONTROL_1,
.bypass_mask = ARIZONA_LDO1_BYPASS,
.min_uV = 900000,
.uV_step = 50000,
.n_voltages = 7,
.enable_time = 500,
.owner = THIS_MODULE,
};
static const struct regulator_init_data arizona_ldo1_dvfs = {
.constraints = {
.min_uV = 1200000,
.max_uV = 1800000,
.valid_ops_mask = REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_VOLTAGE,
},
.num_consumer_supplies = 1,
};
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.
*/
switch (arizona->type) {
case WM5102:
ldo1->init_data = arizona_ldo1_dvfs;
break;
default:
ldo1->init_data = arizona_ldo1_default;
break;
}
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");
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