6608a5e2dd
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
167 lines
3.7 KiB
C
167 lines
3.7 KiB
C
/*
|
|
* I2C access for DA9052 PMICs.
|
|
*
|
|
* Copyright(c) 2011 Dialog Semiconductor Ltd.
|
|
*
|
|
* Author: David Dajun Chen <dchen@diasemi.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/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/input.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/err.h>
|
|
|
|
#include <linux/mfd/da9052/da9052.h>
|
|
#include <linux/mfd/da9052/reg.h>
|
|
|
|
#ifdef CONFIG_OF
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#endif
|
|
|
|
static int da9052_i2c_enable_multiwrite(struct da9052 *da9052)
|
|
{
|
|
int reg_val, ret;
|
|
|
|
ret = regmap_read(da9052->regmap, DA9052_CONTROL_B_REG, ®_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (reg_val & DA9052_CONTROL_B_WRITEMODE) {
|
|
reg_val &= ~DA9052_CONTROL_B_WRITEMODE;
|
|
ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG,
|
|
reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_device_id da9052_i2c_id[] = {
|
|
{"da9052", DA9052},
|
|
{"da9053-aa", DA9053_AA},
|
|
{"da9053-ba", DA9053_BA},
|
|
{"da9053-bb", DA9053_BB},
|
|
{}
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id dialog_dt_ids[] = {
|
|
{ .compatible = "dlg,da9052", .data = &da9052_i2c_id[0] },
|
|
{ .compatible = "dlg,da9053-aa", .data = &da9052_i2c_id[1] },
|
|
{ .compatible = "dlg,da9053-ab", .data = &da9052_i2c_id[2] },
|
|
{ .compatible = "dlg,da9053-bb", .data = &da9052_i2c_id[3] },
|
|
{ /* sentinel */ }
|
|
};
|
|
#endif
|
|
|
|
static int __devinit da9052_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct da9052 *da9052;
|
|
int ret;
|
|
|
|
da9052 = devm_kzalloc(&client->dev, sizeof(struct da9052), GFP_KERNEL);
|
|
if (!da9052)
|
|
return -ENOMEM;
|
|
|
|
if (!i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_BYTE_DATA)) {
|
|
dev_info(&client->dev, "Error in %s:i2c_check_functionality\n",
|
|
__func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
da9052->dev = &client->dev;
|
|
da9052->chip_irq = client->irq;
|
|
|
|
i2c_set_clientdata(client, da9052);
|
|
|
|
da9052->regmap = devm_regmap_init_i2c(client, &da9052_regmap_config);
|
|
if (IS_ERR(da9052->regmap)) {
|
|
ret = PTR_ERR(da9052->regmap);
|
|
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = da9052_i2c_enable_multiwrite(da9052);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
#ifdef CONFIG_OF
|
|
if (!id) {
|
|
struct device_node *np = client->dev.of_node;
|
|
const struct of_device_id *deviceid;
|
|
|
|
deviceid = of_match_node(dialog_dt_ids, np);
|
|
id = (const struct i2c_device_id *)deviceid->data;
|
|
}
|
|
#endif
|
|
|
|
if (!id) {
|
|
ret = -ENODEV;
|
|
dev_err(&client->dev, "id is null.\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = da9052_device_init(da9052, id->driver_data);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit da9052_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct da9052 *da9052 = i2c_get_clientdata(client);
|
|
|
|
da9052_device_exit(da9052);
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver da9052_i2c_driver = {
|
|
.probe = da9052_i2c_probe,
|
|
.remove = __devexit_p(da9052_i2c_remove),
|
|
.id_table = da9052_i2c_id,
|
|
.driver = {
|
|
.name = "da9052",
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_OF
|
|
.of_match_table = dialog_dt_ids,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
static int __init da9052_i2c_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = i2c_add_driver(&da9052_i2c_driver);
|
|
if (ret != 0) {
|
|
pr_err("DA9052 I2C registration failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
subsys_initcall(da9052_i2c_init);
|
|
|
|
static void __exit da9052_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&da9052_i2c_driver);
|
|
}
|
|
module_exit(da9052_i2c_exit);
|
|
|
|
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
|
|
MODULE_DESCRIPTION("I2C driver for Dialog DA9052 PMIC");
|
|
MODULE_LICENSE("GPL");
|