1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Arizona-i2c.c  --  Arizona I2C bus interface
  4 *
  5 * Copyright 2012 Wolfson Microelectronics plc
  6 *
  7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  8 */
  9
 10#include <linux/err.h>
 11#include <linux/i2c.h>
 12#include <linux/module.h>
 13#include <linux/pm_runtime.h>
 14#include <linux/regmap.h>
 15#include <linux/regulator/consumer.h>
 16#include <linux/slab.h>
 17#include <linux/of.h>
 18
 19#include <linux/mfd/arizona/core.h>
 20
 21#include "arizona.h"
 22
 23static int arizona_i2c_probe(struct i2c_client *i2c)
 24{
 25	struct arizona *arizona;
 26	const struct regmap_config *regmap_config = NULL;
 27	unsigned long type;
 28	int ret;
 29
 30	type = (uintptr_t)i2c_get_match_data(i2c);
 31	switch (type) {
 32	case WM5102:
 33		if (IS_ENABLED(CONFIG_MFD_WM5102))
 34			regmap_config = &wm5102_i2c_regmap;
 35		break;
 36	case WM5110:
 37	case WM8280:
 38		if (IS_ENABLED(CONFIG_MFD_WM5110))
 39			regmap_config = &wm5110_i2c_regmap;
 40		break;
 41	case WM8997:
 42		if (IS_ENABLED(CONFIG_MFD_WM8997))
 43			regmap_config = &wm8997_i2c_regmap;
 44		break;
 45	case WM8998:
 46	case WM1814:
 47		if (IS_ENABLED(CONFIG_MFD_WM8998))
 48			regmap_config = &wm8998_i2c_regmap;
 49		break;
 50	default:
 51		dev_err(&i2c->dev, "Unknown device type %ld\n", type);
 52		return -EINVAL;
 53	}
 54
 55	if (!regmap_config) {
 56		dev_err(&i2c->dev,
 57			"No kernel support for device type %ld\n", type);
 58		return -EINVAL;
 59	}
 60
 61	arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
 62	if (arizona == NULL)
 63		return -ENOMEM;
 64
 65	arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
 66	if (IS_ERR(arizona->regmap)) {
 67		ret = PTR_ERR(arizona->regmap);
 68		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 69			ret);
 70		return ret;
 71	}
 72
 73	arizona->type = type;
 74	arizona->dev = &i2c->dev;
 75	arizona->irq = i2c->irq;
 76
 77	return arizona_dev_init(arizona);
 78}
 79
 80static void arizona_i2c_remove(struct i2c_client *i2c)
 81{
 82	struct arizona *arizona = dev_get_drvdata(&i2c->dev);
 83
 84	arizona_dev_exit(arizona);
 85}
 86
 87static const struct i2c_device_id arizona_i2c_id[] = {
 88	{ "wm5102", WM5102 },
 89	{ "wm5110", WM5110 },
 90	{ "wm8280", WM8280 },
 91	{ "wm8997", WM8997 },
 92	{ "wm8998", WM8998 },
 93	{ "wm1814", WM1814 },
 94	{ }
 95};
 96MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
 97
 98#ifdef CONFIG_OF
 99static const struct of_device_id arizona_i2c_of_match[] = {
100	{ .compatible = "wlf,wm5102", .data = (void *)WM5102 },
101	{ .compatible = "wlf,wm5110", .data = (void *)WM5110 },
102	{ .compatible = "wlf,wm8280", .data = (void *)WM8280 },
103	{ .compatible = "wlf,wm8997", .data = (void *)WM8997 },
104	{ .compatible = "wlf,wm8998", .data = (void *)WM8998 },
105	{ .compatible = "wlf,wm1814", .data = (void *)WM1814 },
106	{},
107};
108MODULE_DEVICE_TABLE(of, arizona_i2c_of_match);
109#endif
110
111static struct i2c_driver arizona_i2c_driver = {
112	.driver = {
113		.name	= "arizona",
114		.pm	= pm_ptr(&arizona_pm_ops),
115		.of_match_table	= of_match_ptr(arizona_i2c_of_match),
116	},
117	.probe		= arizona_i2c_probe,
118	.remove		= arizona_i2c_remove,
119	.id_table	= arizona_i2c_id,
120};
121
122module_i2c_driver(arizona_i2c_driver);
123
124MODULE_SOFTDEP("pre: arizona_ldo1");
125MODULE_DESCRIPTION("Arizona I2C bus interface");
126MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
127MODULE_LICENSE("GPL");