1/*
2 * wm831x-spi.c  --  SPI access for Wolfson WM831x PMICs
3 *
4 * Copyright 2009,2010 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 it
9 *  under  the terms of  the GNU General  Public License as published by the
10 *  Free Software Foundation;  either version 2 of the  License, or (at your
11 *  option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/pm.h>
18#include <linux/spi/spi.h>
19#include <linux/regmap.h>
20#include <linux/err.h>
21
22#include <linux/mfd/wm831x/core.h>
23
24static int wm831x_spi_probe(struct spi_device *spi)
25{
26	const struct spi_device_id *id = spi_get_device_id(spi);
27	struct wm831x *wm831x;
28	enum wm831x_parent type;
29	int ret;
30
31	type = (enum wm831x_parent)id->driver_data;
32
33	wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
34	if (wm831x == NULL)
35		return -ENOMEM;
36
37	spi->mode = SPI_MODE_0;
38
39	spi_set_drvdata(spi, wm831x);
40	wm831x->dev = &spi->dev;
41
42	wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
43	if (IS_ERR(wm831x->regmap)) {
44		ret = PTR_ERR(wm831x->regmap);
45		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
46			ret);
47		return ret;
48	}
49
50	return wm831x_device_init(wm831x, type, spi->irq);
51}
52
53static int wm831x_spi_remove(struct spi_device *spi)
54{
55	struct wm831x *wm831x = spi_get_drvdata(spi);
56
57	wm831x_device_exit(wm831x);
58
59	return 0;
60}
61
62static int wm831x_spi_suspend(struct device *dev)
63{
64	struct wm831x *wm831x = dev_get_drvdata(dev);
65
66	return wm831x_device_suspend(wm831x);
67}
68
69static int wm831x_spi_poweroff(struct device *dev)
70{
71	struct wm831x *wm831x = dev_get_drvdata(dev);
72
73	wm831x_device_shutdown(wm831x);
74
75	return 0;
76}
77
78static const struct dev_pm_ops wm831x_spi_pm = {
79	.freeze = wm831x_spi_suspend,
80	.suspend = wm831x_spi_suspend,
81	.poweroff = wm831x_spi_poweroff,
82};
83
84static const struct spi_device_id wm831x_spi_ids[] = {
85	{ "wm8310", WM8310 },
86	{ "wm8311", WM8311 },
87	{ "wm8312", WM8312 },
88	{ "wm8320", WM8320 },
89	{ "wm8321", WM8321 },
90	{ "wm8325", WM8325 },
91	{ "wm8326", WM8326 },
92	{ },
93};
94MODULE_DEVICE_TABLE(spi, wm831x_spi_ids);
95
96static struct spi_driver wm831x_spi_driver = {
97	.driver = {
98		.name	= "wm831x",
99		.pm	= &wm831x_spi_pm,
100	},
101	.id_table	= wm831x_spi_ids,
102	.probe		= wm831x_spi_probe,
103	.remove		= wm831x_spi_remove,
104};
105
106static int __init wm831x_spi_init(void)
107{
108	int ret;
109
110	ret = spi_register_driver(&wm831x_spi_driver);
111	if (ret != 0)
112		pr_err("Failed to register WM831x SPI driver: %d\n", ret);
113
114	return 0;
115}
116subsys_initcall(wm831x_spi_init);
117
118static void __exit wm831x_spi_exit(void)
119{
120	spi_unregister_driver(&wm831x_spi_driver);
121}
122module_exit(wm831x_spi_exit);
123
124MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
125MODULE_LICENSE("GPL");
126MODULE_AUTHOR("Mark Brown");
127