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/*
* isl9305 - Intersil ISL9305 DCDC regulator
*
* Copyright 2014 Linaro Ltd
*
* Author: Mark Brown <broonie@kernel.org>
*
* 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/err.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/platform_data/isl9305.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/*
* Registers
*/
#define ISL9305_DCD1OUT 0x0
#define ISL9305_DCD2OUT 0x1
#define ISL9305_LDO1OUT 0x2
#define ISL9305_LDO2OUT 0x3
#define ISL9305_DCD_PARAMETER 0x4
#define ISL9305_SYSTEM_PARAMETER 0x5
#define ISL9305_DCD_SRCTL 0x6
#define ISL9305_MAX_REG ISL9305_DCD_SRCTL
/*
* DCD_PARAMETER
*/
#define ISL9305_DCD_PHASE 0x40
#define ISL9305_DCD2_ULTRA 0x20
#define ISL9305_DCD1_ULTRA 0x10
#define ISL9305_DCD2_BLD 0x08
#define ISL9305_DCD1_BLD 0x04
#define ISL9305_DCD2_MODE 0x02
#define ISL9305_DCD1_MODE 0x01
/*
* SYSTEM_PARAMETER
*/
#define ISL9305_I2C_EN 0x40
#define ISL9305_DCDPOR_MASK 0x30
#define ISL9305_LDO2_EN 0x08
#define ISL9305_LDO1_EN 0x04
#define ISL9305_DCD2_EN 0x02
#define ISL9305_DCD1_EN 0x01
/*
* DCD_SRCTL
*/
#define ISL9305_DCD2SR_MASK 0xc0
#define ISL9305_DCD1SR_MASK 0x07
static const struct regulator_ops isl9305_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
};
static const struct regulator_desc isl9305_regulators[] = {
[ISL9305_DCD1] = {
.name = "DCD1",
.n_voltages = 0x70,
.min_uV = 825000,
.uV_step = 25000,
.vsel_reg = ISL9305_DCD1OUT,
.vsel_mask = 0x7f,
.enable_reg = ISL9305_SYSTEM_PARAMETER,
.enable_mask = ISL9305_DCD1_EN,
.supply_name = "VINDCD1",
.ops = &isl9305_ops,
},
[ISL9305_DCD2] = {
.name = "DCD2",
.n_voltages = 0x70,
.min_uV = 825000,
.uV_step = 25000,
.vsel_reg = ISL9305_DCD2OUT,
.vsel_mask = 0x7f,
.enable_reg = ISL9305_SYSTEM_PARAMETER,
.enable_mask = ISL9305_DCD2_EN,
.supply_name = "VINDCD2",
.ops = &isl9305_ops,
},
[ISL9305_LDO1] = {
.name = "LDO1",
.n_voltages = 0x37,
.min_uV = 900000,
.uV_step = 50000,
.vsel_reg = ISL9305_LDO1OUT,
.vsel_mask = 0x3f,
.enable_reg = ISL9305_SYSTEM_PARAMETER,
.enable_mask = ISL9305_LDO1_EN,
.supply_name = "VINLDO1",
.ops = &isl9305_ops,
},
[ISL9305_LDO2] = {
.name = "LDO2",
.n_voltages = 0x37,
.min_uV = 900000,
.uV_step = 50000,
.vsel_reg = ISL9305_LDO2OUT,
.vsel_mask = 0x3f,
.enable_reg = ISL9305_SYSTEM_PARAMETER,
.enable_mask = ISL9305_LDO2_EN,
.supply_name = "VINLDO2",
.ops = &isl9305_ops,
},
};
#ifdef CONFIG_OF
static struct of_regulator_match isl9305_reg_matches[] = {
[ISL9305_DCD1] = { .name = "dcd1" },
[ISL9305_DCD2] = { .name = "dcd2" },
[ISL9305_LDO1] = { .name = "ldo1" },
[ISL9305_LDO2] = { .name = "ldo2" },
};
static struct of_regulator_match *isl9305_parse_dt(struct i2c_client *i2c)
{
struct device_node *node = i2c->dev.of_node;
struct of_regulator_match *matches;
struct device_node *regs;
int count;
regs = of_get_child_by_name(node, "regulators");
if (!regs)
return NULL;
matches = devm_kmemdup(&i2c->dev, isl9305_reg_matches,
sizeof(isl9305_reg_matches), GFP_KERNEL);
if (!matches)
return NULL;
count = of_regulator_match(&i2c->dev, regs, matches,
ARRAY_SIZE(isl9305_reg_matches));
of_node_put(regs);
if ((count < 0) || (count > ARRAY_SIZE(isl9305_reg_matches)))
return NULL;
return matches;
}
#else
static struct of_regulator_match *isl9305_parse_dt(struct i2c_client *i2c)
{
return NULL;
}
#endif
static const struct regmap_config isl9305_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = ISL9305_MAX_REG,
.cache_type = REGCACHE_RBTREE,
};
static int isl9305_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct regulator_config config = { };
struct isl9305_pdata *pdata = i2c->dev.platform_data;
struct of_regulator_match *of_matches;
struct regulator_dev *rdev;
struct regmap *regmap;
int i, ret;
of_matches = isl9305_parse_dt(i2c);
regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
return ret;
}
config.dev = &i2c->dev;
for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
config.of_node = NULL;
config.init_data = NULL;
if (of_matches) {
config.init_data = of_matches[i].init_data;
config.of_node = of_matches[i].of_node;
}
if (!config.init_data && pdata)
config.init_data = pdata->init_data[i];
rdev = devm_regulator_register(&i2c->dev,
&isl9305_regulators[i],
&config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(&i2c->dev, "Failed to register %s: %d\n",
isl9305_regulators[i].name, ret);
return ret;
}
}
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id isl9305_dt_ids[] = {
{ .compatible = "isl,isl9305" },
{ .compatible = "isl,isl9305h" },
{},
};
#endif
static const struct i2c_device_id isl9305_i2c_id[] = {
{ "isl9305", },
{ "isl9305h", },
{ }
};
MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
static struct i2c_driver isl9305_regulator_driver = {
.driver = {
.name = "isl9305",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(isl9305_dt_ids),
},
.probe = isl9305_i2c_probe,
.id_table = isl9305_i2c_id,
};
module_i2c_driver(isl9305_regulator_driver);
MODULE_AUTHOR("Mark Brown");
MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
MODULE_LICENSE("GPL");
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