1/*
  2 * Arizona-i2c.c  --  Arizona I2C bus interface
  3 *
  4 * Copyright 2012 Wolfson Microelectronics plc
  5 *
  6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  7 *
  8 * This program is free software; you can redistribute it and/or modify
  9 * it under the terms of the GNU General Public License version 2 as
 10 * published by the Free Software Foundation.
 11 */
 12
 13#include <linux/err.h>
 14#include <linux/i2c.h>
 15#include <linux/module.h>
 16#include <linux/pm_runtime.h>
 17#include <linux/regmap.h>
 18#include <linux/regulator/consumer.h>
 19#include <linux/slab.h>
 20#include <linux/of.h>
 21
 22#include <linux/mfd/arizona/core.h>
 23
 24#include "arizona.h"
 25
 26static int arizona_i2c_probe(struct i2c_client *i2c,
 27			     const struct i2c_device_id *id)
 28{
 29	struct arizona *arizona;
 30	const struct regmap_config *regmap_config = NULL;
 31	unsigned long type;
 32	int ret;
 33
 34	if (i2c->dev.of_node)
 35		type = arizona_of_get_type(&i2c->dev);
 36	else
 37		type = id->driver_data;
 38
 39	switch (type) {
 40	case WM5102:
 41		if (IS_ENABLED(CONFIG_MFD_WM5102))
 42			regmap_config = &wm5102_i2c_regmap;
 43		break;
 44	case WM5110:
 45	case WM8280:
 46		if (IS_ENABLED(CONFIG_MFD_WM5110))
 47			regmap_config = &wm5110_i2c_regmap;
 48		break;
 49	case WM8997:
 50		if (IS_ENABLED(CONFIG_MFD_WM8997))
 51			regmap_config = &wm8997_i2c_regmap;
 52		break;
 53	case WM8998:
 54	case WM1814:
 55		if (IS_ENABLED(CONFIG_MFD_WM8998))
 56			regmap_config = &wm8998_i2c_regmap;
 57		break;
 58	default:
 59		dev_err(&i2c->dev, "Unknown device type %ld\n", type);
 60		return -EINVAL;
 61	}
 62
 63	if (!regmap_config) {
 64		dev_err(&i2c->dev,
 65			"No kernel support for device type %ld\n", type);
 66		return -EINVAL;
 67	}
 68
 69	arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
 70	if (arizona == NULL)
 71		return -ENOMEM;
 72
 73	arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
 74	if (IS_ERR(arizona->regmap)) {
 75		ret = PTR_ERR(arizona->regmap);
 76		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 77			ret);
 78		return ret;
 79	}
 80
 81	arizona->type = type;
 82	arizona->dev = &i2c->dev;
 83	arizona->irq = i2c->irq;
 84
 85	return arizona_dev_init(arizona);
 86}
 87
 88static int arizona_i2c_remove(struct i2c_client *i2c)
 89{
 90	struct arizona *arizona = dev_get_drvdata(&i2c->dev);
 91
 92	arizona_dev_exit(arizona);
 93
 94	return 0;
 95}
 96
 97static const struct i2c_device_id arizona_i2c_id[] = {
 98	{ "wm5102", WM5102 },
 99	{ "wm5110", WM5110 },
100	{ "wm8280", WM8280 },
101	{ "wm8997", WM8997 },
102	{ "wm8998", WM8998 },
103	{ "wm1814", WM1814 },
104	{ }
105};
106MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
107
108static struct i2c_driver arizona_i2c_driver = {
109	.driver = {
110		.name	= "arizona",
111		.pm	= &arizona_pm_ops,
112		.of_match_table	= of_match_ptr(arizona_of_match),
113	},
114	.probe		= arizona_i2c_probe,
115	.remove		= arizona_i2c_remove,
116	.id_table	= arizona_i2c_id,
117};
118
119module_i2c_driver(arizona_i2c_driver);
120
121MODULE_DESCRIPTION("Arizona I2C bus interface");
122MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
123MODULE_LICENSE("GPL");