[linux-2.6-block.git] / drivers / mfd / wm831x-spi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * wm831x-spi.c  --  SPI access for Wolfson WM831x PMICs
 *
 * Copyright 2009,2010 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/err.h>

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

static int wm831x_spi_probe(struct spi_device *spi)
{
	struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
	const struct spi_device_id *id = spi_get_device_id(spi);
	const struct of_device_id *of_id;
	struct wm831x *wm831x;
	enum wm831x_parent type;
	int ret;

	if (spi->dev.of_node) {
		of_id = of_match_device(wm831x_of_match, &spi->dev);
		if (!of_id) {
			dev_err(&spi->dev, "Failed to match device\n");
			return -ENODEV;
		}
		type = (enum wm831x_parent)of_id->data;
	} else {
		type = (enum wm831x_parent)id->driver_data;
	}

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

	spi->mode = SPI_MODE_0;

	spi_set_drvdata(spi, wm831x);
	wm831x->dev = &spi->dev;
	wm831x->type = type;

	wm831x->regmap = devm_regmap_init_spi(spi, &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, spi->irq);
}

static int wm831x_spi_suspend(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	return wm831x_device_suspend(wm831x);
}

static int wm831x_spi_poweroff(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	wm831x_device_shutdown(wm831x);

	return 0;
}

static const struct dev_pm_ops wm831x_spi_pm = {
	.freeze = wm831x_spi_suspend,
	.suspend = wm831x_spi_suspend,
	.poweroff = wm831x_spi_poweroff,
};

static const struct spi_device_id wm831x_spi_ids[] = {
	{ "wm8310", WM8310 },
	{ "wm8311", WM8311 },
	{ "wm8312", WM8312 },
	{ "wm8320", WM8320 },
	{ "wm8321", WM8321 },
	{ "wm8325", WM8325 },
	{ "wm8326", WM8326 },
	{ },
};

static struct spi_driver wm831x_spi_driver = {
	.driver = {
		.name	= "wm831x",
		.pm	= &wm831x_spi_pm,
		.of_match_table = of_match_ptr(wm831x_of_match),
		.suppress_bind_attrs = true,
	},
	.id_table	= wm831x_spi_ids,
	.probe		= wm831x_spi_probe,
};

static int __init wm831x_spi_init(void)
{
	int ret;

	ret = spi_register_driver(&wm831x_spi_driver);
	if (ret != 0)
		pr_err("Failed to register WM831x SPI driver: %d\n", ret);

	return 0;
}
subsys_initcall(wm831x_spi_init);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
2aa13b9e MB	2	/*
	3	* wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
	4	*
	5	* Copyright 2009,2010 Wolfson Microelectronics PLC.
	6	*
	7	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
2aa13b9e MB	8	*/
	9
	10	#include <linux/kernel.h>
e85c5f0a	11	#include <linux/init.h>
f6dd8449 CK	12	#include <linux/of.h>
f6dd8449 CK	13	#include <linux/of_device.h>
87d1906d	14	#include <linux/pm.h>
2aa13b9e	15	#include <linux/spi/spi.h>
1df5981b MB	16	#include <linux/regmap.h>
1df5981b MB	17	#include <linux/err.h>
2aa13b9e MB	18
	19	#include <linux/mfd/wm831x/core.h>
	20
f791be49	21	static int wm831x_spi_probe(struct spi_device *spi)
2aa13b9e	22	{
f6dd8449	23	struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
5570c2f7	24	const struct spi_device_id *id = spi_get_device_id(spi);
f6dd8449	25	const struct of_device_id *of_id;
2aa13b9e MB	26	struct wm831x *wm831x;
2aa13b9e MB	27	enum wm831x_parent type;
1df5981b	28	int ret;
2aa13b9e	29
f6dd8449 CK	30	if (spi->dev.of_node) {
f6dd8449 CK	31	of_id = of_match_device(wm831x_of_match, &spi->dev);
7b55033f GS	32	if (!of_id) {
	33	dev_err(&spi->dev, "Failed to match device\n");
	34	return -ENODEV;
	35	}
f6dd8449 CK	36	type = (enum wm831x_parent)of_id->data;
	37	} else {
	38	type = (enum wm831x_parent)id->driver_data;
	39	}
2aa13b9e	40
d48cbb74	41	wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
2aa13b9e MB	42	if (wm831x == NULL)
	43	return -ENOMEM;
	44
2aa13b9e MB	45	spi->mode = SPI_MODE_0;
2aa13b9e MB	46
0c0d2ab0	47	spi_set_drvdata(spi, wm831x);
2aa13b9e	48	wm831x->dev = &spi->dev;
f6dd8449	49	wm831x->type = type;
1df5981b	50
130a7032	51	wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
1df5981b MB	52	if (IS_ERR(wm831x->regmap)) {
	53	ret = PTR_ERR(wm831x->regmap);
	54	dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
	55	ret);
1df5981b MB	56	return ret;
1df5981b MB	57	}
2aa13b9e	58
f6dd8449 CK	59	if (pdata)
	60	memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
	61
	62	return wm831x_device_init(wm831x, spi->irq);
2aa13b9e MB	63	}
2aa13b9e MB	64
87d1906d	65	static int wm831x_spi_suspend(struct device *dev)
2aa13b9e	66	{
87d1906d	67	struct wm831x *wm831x = dev_get_drvdata(dev);
2aa13b9e MB	68
	69	return wm831x_device_suspend(wm831x);
	70	}
	71
b9736a16	72	static int wm831x_spi_poweroff(struct device *dev)
523d9cfb	73	{
b9736a16	74	struct wm831x *wm831x = dev_get_drvdata(dev);
523d9cfb MB	75
523d9cfb MB	76	wm831x_device_shutdown(wm831x);
b9736a16 MB	77
b9736a16 MB	78	return 0;
523d9cfb MB	79	}
523d9cfb MB	80
87d1906d MB	81	static const struct dev_pm_ops wm831x_spi_pm = {
	82	.freeze = wm831x_spi_suspend,
	83	.suspend = wm831x_spi_suspend,
b9736a16	84	.poweroff = wm831x_spi_poweroff,
87d1906d MB	85	};
87d1906d MB	86
5570c2f7 MB	87	static const struct spi_device_id wm831x_spi_ids[] = {
	88	{ "wm8310", WM8310 },
	89	{ "wm8311", WM8311 },
	90	{ "wm8312", WM8312 },
	91	{ "wm8320", WM8320 },
	92	{ "wm8321", WM8321 },
	93	{ "wm8325", WM8325 },
	94	{ "wm8326", WM8326 },
	95	{ },
2aa13b9e MB	96	};
2aa13b9e MB	97
5570c2f7	98	static struct spi_driver wm831x_spi_driver = {
2aa13b9e	99	.driver = {
5570c2f7	100	.name = "wm831x",
87d1906d	101	.pm = &wm831x_spi_pm,
f6dd8449	102	.of_match_table = of_match_ptr(wm831x_of_match),
e85c5f0a	103	.suppress_bind_attrs = true,
412dc11d	104	},
5570c2f7	105	.id_table = wm831x_spi_ids,
412dc11d	106	.probe = wm831x_spi_probe,
412dc11d MB	107	};
412dc11d MB	108
2aa13b9e MB	109	static int __init wm831x_spi_init(void)
	110	{
	111	int ret;
	112
5570c2f7	113	ret = spi_register_driver(&wm831x_spi_driver);
412dc11d	114	if (ret != 0)
5570c2f7	115	pr_err("Failed to register WM831x SPI driver: %d\n", ret);
412dc11d	116
2aa13b9e MB	117	return 0;
	118	}
	119	subsys_initcall(wm831x_spi_init);