Release 4.7 drivers/regulator/isl6271a-regulator.c

/*
 * isl6271a-regulator.c
 *
 * Support for Intersil ISL6271A voltage regulator
 *
 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/i2c.h>
#include <linux/slab.h>


#define	ISL6271A_VOLTAGE_MIN	850000

#define	ISL6271A_VOLTAGE_MAX	1600000

#define	ISL6271A_VOLTAGE_STEP	50000

/* PMIC details */

struct isl_pmic {
	
struct i2c_client	*client;
	
struct regulator_dev	*rdev[3];
	
struct mutex		mtx;
};



static int isl6271a_get_voltage_sel(struct regulator_dev *dev)
{
	struct isl_pmic *pmic = rdev_get_drvdata(dev);
	int idx;

	mutex_lock(&pmic->mtx);

	idx = i2c_smbus_read_byte(pmic->client);
	if (idx < 0)
		dev_err(&pmic->client->dev, "Error getting voltage\n");

	mutex_unlock(&pmic->mtx);
	return idx;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
marek vasut
marek vasut
68
97.14%
1
50.00%
axel lin
axel lin
2
2.86%
1
50.00%
Total
70
100.00%
2
100.00%



static int isl6271a_set_voltage_sel(struct regulator_dev *dev,
				    unsigned selector)
{
	struct isl_pmic *pmic = rdev_get_drvdata(dev);
	int err;

	mutex_lock(&pmic->mtx);

	err = i2c_smbus_write_byte(pmic->client, selector);
	if (err < 0)
		dev_err(&pmic->client->dev, "Error setting voltage\n");

	mutex_unlock(&pmic->mtx);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
marek vasut
marek vasut
71
94.67%
1
33.33%
axel lin
axel lin
2
2.67%
1
33.33%
mark brown
mark brown
2
2.67%
1
33.33%
Total
75
100.00%
3
100.00%


static struct regulator_ops isl_core_ops = {
	.get_voltage_sel = isl6271a_get_voltage_sel,
	.set_voltage_sel = isl6271a_set_voltage_sel,
	.list_voltage	= regulator_list_voltage_linear,
	.map_voltage	= regulator_map_voltage_linear,
};


static struct regulator_ops isl_fixed_ops = {
	.list_voltage	= regulator_list_voltage_linear,
};


static const struct regulator_desc isl_rd[] = {
	{
		.name		= "Core Buck",
		.id		= 0,
		.n_voltages	= 16,
		.ops		= &isl_core_ops,
		.type		= REGULATOR_VOLTAGE,
		.owner		= THIS_MODULE,
		.min_uV		= ISL6271A_VOLTAGE_MIN,
		.uV_step	= ISL6271A_VOLTAGE_STEP,
        }, {
		.name		= "LDO1",
		.id		= 1,
		.n_voltages	= 1,
		.ops		= &isl_fixed_ops,
		.type		= REGULATOR_VOLTAGE,
		.owner		= THIS_MODULE,
		.min_uV		= 1100000,
        }, {
		.name		= "LDO2",
		.id		= 2,
		.n_voltages	= 1,
		.ops		= &isl_fixed_ops,
		.type		= REGULATOR_VOLTAGE,
		.owner		= THIS_MODULE,
		.min_uV		= 1300000,
        },
};



static int isl6271a_probe(struct i2c_client *i2c,
				     const struct i2c_device_id *id)
{
	struct regulator_config config = { };
	struct regulator_init_data *init_data	= dev_get_platdata(&i2c->dev);
	struct isl_pmic *pmic;
	int i;

	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	pmic = devm_kzalloc(&i2c->dev, sizeof(struct isl_pmic), GFP_KERNEL);
	if (!pmic)
		return -ENOMEM;

	pmic->client = i2c;

	mutex_init(&pmic->mtx);

	for (i = 0; i < 3; i++) {
		config.dev = &i2c->dev;
		if (i == 0)
			config.init_data = init_data;
		else
			config.init_data = NULL;
		config.driver_data = pmic;

		pmic->rdev[i] = devm_regulator_register(&i2c->dev, &isl_rd[i],
							&config);
		if (IS_ERR(pmic->rdev[i])) {
			dev_err(&i2c->dev, "failed to register %s\n", id->name);
			return PTR_ERR(pmic->rdev[i]);
		}
	}

	i2c_set_clientdata(i2c, pmic);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
marek vasut
marek vasut
160
71.75%
1
12.50%
mark brown
mark brown
40
17.94%
1
12.50%
sachin kamat
sachin kamat
9
4.04%
2
25.00%
axel lin
axel lin
7
3.14%
2
25.00%
jingoo han
jingoo han
4
1.79%
1
12.50%
roel kluin
roel kluin
3
1.35%
1
12.50%
Total
223
100.00%
8
100.00%


static const struct i2c_device_id isl6271a_id[] = {
	{.name = "isl6271a", 0 },
	{ },
};

MODULE_DEVICE_TABLE(i2c, isl6271a_id);


static struct i2c_driver isl6271a_i2c_driver = {
	.driver = {
		.name = "isl6271a",
        },
	.probe = isl6271a_probe,
	.id_table = isl6271a_id,
};



static int __init isl6271a_init(void)
{
	return i2c_add_driver(&isl6271a_i2c_driver);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
marek vasut
marek vasut
16
100.00%
1
100.00%
Total
16
100.00%
1
100.00%



static void __exit isl6271a_cleanup(void)
{
	i2c_del_driver(&isl6271a_i2c_driver);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
marek vasut
marek vasut
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%


subsys_initcall(isl6271a_init);

module_exit(isl6271a_cleanup);

MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
MODULE_DESCRIPTION("Intersil ISL6271A voltage regulator driver");
MODULE_LICENSE("GPL v2");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
marek vasut
marek vasut
604
85.67%
1
7.14%
axel lin
axel lin
43
6.10%
7
50.00%
mark brown
mark brown
42
5.96%
2
14.29%
sachin kamat
sachin kamat
9
1.28%
2
14.29%
jingoo han
jingoo han
4
0.57%
1
7.14%
roel kluin
roel kluin
3
0.43%
1
7.14%
Total
705
100.00%
14
100.00%
  
Directory: drivers/regulator

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.