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arizona-i2c.c
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arizona-i2c.c
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/*
* Arizona-i2c.c -- Arizona I2C bus interface
*
* Copyright 2012 Wolfson Microelectronics plc
*
* Author: Mark Brown <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/mfd/arizona/core.h>
#include "arizona.h"
static int arizona_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct arizona *arizona;
const struct regmap_config *regmap_config = NULL;
unsigned long type;
int ret;
if (i2c->dev.of_node)
type = arizona_of_get_type(&i2c->dev);
else
type = id->driver_data;
switch (type) {
case WM5102:
if (IS_ENABLED(CONFIG_MFD_WM5102))
regmap_config = &wm5102_i2c_regmap;
break;
case WM5110:
case WM8280:
if (IS_ENABLED(CONFIG_MFD_WM5110))
regmap_config = &wm5110_i2c_regmap;
break;
case WM8997:
if (IS_ENABLED(CONFIG_MFD_WM8997))
regmap_config = &wm8997_i2c_regmap;
break;
case WM8998:
case WM1814:
if (IS_ENABLED(CONFIG_MFD_WM8998))
regmap_config = &wm8998_i2c_regmap;
break;
default:
dev_err(&i2c->dev, "Unknown device type %ld\n", type);
return -EINVAL;
}
if (!regmap_config) {
dev_err(&i2c->dev,
"No kernel support for device type %ld\n", type);
return -EINVAL;
}
arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
if (arizona == NULL)
return -ENOMEM;
arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
if (IS_ERR(arizona->regmap)) {
ret = PTR_ERR(arizona->regmap);
dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
arizona->type = type;
arizona->dev = &i2c->dev;
arizona->irq = i2c->irq;
return arizona_dev_init(arizona);
}
static int arizona_i2c_remove(struct i2c_client *i2c)
{
struct arizona *arizona = dev_get_drvdata(&i2c->dev);
arizona_dev_exit(arizona);
return 0;
}
static const struct i2c_device_id arizona_i2c_id[] = {
{ "wm5102", WM5102 },
{ "wm5110", WM5110 },
{ "wm8280", WM8280 },
{ "wm8997", WM8997 },
{ "wm8998", WM8998 },
{ "wm1814", WM1814 },
{ }
};
MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
static struct i2c_driver arizona_i2c_driver = {
.driver = {
.name = "arizona",
.pm = &arizona_pm_ops,
.of_match_table = of_match_ptr(arizona_of_match),
},
.probe = arizona_i2c_probe,
.remove = arizona_i2c_remove,
.id_table = arizona_i2c_id,
};
module_i2c_driver(arizona_i2c_driver);
MODULE_DESCRIPTION("Arizona I2C bus interface");
MODULE_AUTHOR("Mark Brown <[email protected]>");
MODULE_LICENSE("GPL");