[linux.git] / drivers / mfd / wm831x-i2c.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * wm831x-i2c.c  --  I2C access for Wolfson WM831x PMICs
 *
 * Copyright 2009,2010 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <[email protected]>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/regmap.h>

#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>

static int wm831x_i2c_probe(struct i2c_client *i2c)
{
	struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
	struct wm831x *wm831x;
	enum wm831x_parent type;
	int ret;

	type = (uintptr_t)i2c_get_match_data(i2c);
	if (!type) {
		dev_err(&i2c->dev, "Failed to match device\n");
		return -ENODEV;
	}

	wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
	if (wm831x == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm831x);
	wm831x->dev = &i2c->dev;
	wm831x->type = type;

	wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
	if (IS_ERR(wm831x->regmap)) {
		ret = PTR_ERR(wm831x->regmap);
		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	if (pdata)
		memcpy(&wm831x->pdata, pdata, sizeof(*pdata));

	return wm831x_device_init(wm831x, i2c->irq);
}

static int wm831x_i2c_suspend(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	return wm831x_device_suspend(wm831x);
}

static int wm831x_i2c_poweroff(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	wm831x_device_shutdown(wm831x);

	return 0;
}

static const struct i2c_device_id wm831x_i2c_id[] = {
	{ "wm8310", WM8310 },
	{ "wm8311", WM8311 },
	{ "wm8312", WM8312 },
	{ "wm8320", WM8320 },
	{ "wm8321", WM8321 },
	{ "wm8325", WM8325 },
	{ "wm8326", WM8326 },
	{ }
};

static const struct dev_pm_ops wm831x_pm_ops = {
	.suspend = wm831x_i2c_suspend,
	.poweroff = wm831x_i2c_poweroff,
};

static struct i2c_driver wm831x_i2c_driver = {
	.driver = {
		.name = "wm831x",
		.pm = &wm831x_pm_ops,
		.of_match_table = of_match_ptr(wm831x_of_match),
		.suppress_bind_attrs = true,
	},
	.probe = wm831x_i2c_probe,
	.id_table = wm831x_i2c_id,
};

static int __init wm831x_i2c_init(void)
{
	int ret;

	ret = i2c_add_driver(&wm831x_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register wm831x I2C driver: %d\n", ret);

	return ret;
}
subsys_initcall(wm831x_i2c_init);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
e5b48684 MB	2	/*
	3	* wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs
	4	*
	5	* Copyright 2009,2010 Wolfson Microelectronics PLC.
	6	*
	7	* Author: Mark Brown <[email protected]>
e5b48684 MB	8	*/
	9
	10	#include <linux/kernel.h>
af5db808	11	#include <linux/init.h>
e5b48684 MB	12	#include <linux/i2c.h>
	13	#include <linux/delay.h>
	14	#include <linux/mfd/core.h>
	15	#include <linux/slab.h>
1df5981b	16	#include <linux/err.h>
f6dd8449	17	#include <linux/of.h>
1df5981b	18	#include <linux/regmap.h>
e5b48684 MB	19
	20	#include <linux/mfd/wm831x/core.h>
	21	#include <linux/mfd/wm831x/pdata.h>
	22
5fb66be1	23	static int wm831x_i2c_probe(struct i2c_client *i2c)
e5b48684	24	{
f6dd8449	25	struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
e5b48684	26	struct wm831x *wm831x;
f6dd8449	27	enum wm831x_parent type;
1df5981b	28	int ret;
e5b48684	29
0db434f5 RH	30	type = (uintptr_t)i2c_get_match_data(i2c);
	31	if (!type) {
	32	dev_err(&i2c->dev, "Failed to match device\n");
	33	return -ENODEV;
f6dd8449 CK	34	}
f6dd8449 CK	35
d48cbb74	36	wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
e5b48684 MB	37	if (wm831x == NULL)
	38	return -ENOMEM;
	39
	40	i2c_set_clientdata(i2c, wm831x);
	41	wm831x->dev = &i2c->dev;
f6dd8449	42	wm831x->type = type;
1df5981b	43
130a7032	44	wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
1df5981b MB	45	if (IS_ERR(wm831x->regmap)) {
	46	ret = PTR_ERR(wm831x->regmap);
	47	dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
	48	ret);
1df5981b MB	49	return ret;
1df5981b MB	50	}
e5b48684	51
f6dd8449 CK	52	if (pdata)
	53	memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
	54
	55	return wm831x_device_init(wm831x, i2c->irq);
e5b48684 MB	56	}
e5b48684 MB	57
c538ddbe	58	static int wm831x_i2c_suspend(struct device *dev)
e5b48684	59	{
c538ddbe	60	struct wm831x *wm831x = dev_get_drvdata(dev);
e5b48684 MB	61
	62	return wm831x_device_suspend(wm831x);
	63	}
	64
b9736a16	65	static int wm831x_i2c_poweroff(struct device *dev)
523d9cfb	66	{
b9736a16	67	struct wm831x *wm831x = dev_get_drvdata(dev);
523d9cfb MB	68
523d9cfb MB	69	wm831x_device_shutdown(wm831x);
b9736a16 MB	70
b9736a16 MB	71	return 0;
523d9cfb MB	72	}
523d9cfb MB	73
e5b48684 MB	74	static const struct i2c_device_id wm831x_i2c_id[] = {
	75	{ "wm8310", WM8310 },
	76	{ "wm8311", WM8311 },
	77	{ "wm8312", WM8312 },
	78	{ "wm8320", WM8320 },
	79	{ "wm8321", WM8321 },
	80	{ "wm8325", WM8325 },
412dc11d	81	{ "wm8326", WM8326 },
e5b48684 MB	82	{ }
e5b48684 MB	83	};
e5b48684	84
c538ddbe MB	85	static const struct dev_pm_ops wm831x_pm_ops = {
c538ddbe MB	86	.suspend = wm831x_i2c_suspend,
b9736a16	87	.poweroff = wm831x_i2c_poweroff,
c538ddbe	88	};
e5b48684 MB	89
	90	static struct i2c_driver wm831x_i2c_driver = {
	91	.driver = {
c538ddbe	92	.name = "wm831x",
c538ddbe	93	.pm = &wm831x_pm_ops,
f6dd8449	94	.of_match_table = of_match_ptr(wm831x_of_match),
af5db808	95	.suppress_bind_attrs = true,
e5b48684	96	},
9816d859	97	.probe = wm831x_i2c_probe,
e5b48684 MB	98	.id_table = wm831x_i2c_id,
	99	};
	100
	101	static int __init wm831x_i2c_init(void)
	102	{
	103	int ret;
	104
	105	ret = i2c_add_driver(&wm831x_i2c_driver);
	106	if (ret != 0)
	107	pr_err("Failed to register wm831x I2C driver: %d\n", ret);
	108
	109	return ret;
	110	}
	111	subsys_initcall(wm831x_i2c_init);