2 * wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
4 * Copyright 2009,2010 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
18 #include <linux/spi/spi.h>
19 #include <linux/regmap.h>
20 #include <linux/err.h>
22 #include <linux/mfd/wm831x/core.h>
24 static int __devinit wm831x_spi_probe(struct spi_device *spi)
26 const struct spi_device_id *id = spi_get_device_id(spi);
27 struct wm831x *wm831x;
28 enum wm831x_parent type;
31 type = (enum wm831x_parent)id->driver_data;
33 wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
37 spi->bits_per_word = 16;
38 spi->mode = SPI_MODE_0;
40 dev_set_drvdata(&spi->dev, wm831x);
41 wm831x->dev = &spi->dev;
43 wm831x->regmap = regmap_init_spi(spi, &wm831x_regmap_config);
44 if (IS_ERR(wm831x->regmap)) {
45 ret = PTR_ERR(wm831x->regmap);
46 dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
52 return wm831x_device_init(wm831x, type, spi->irq);
55 static int __devexit wm831x_spi_remove(struct spi_device *spi)
57 struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
59 wm831x_device_exit(wm831x);
64 static int wm831x_spi_suspend(struct device *dev)
66 struct wm831x *wm831x = dev_get_drvdata(dev);
68 return wm831x_device_suspend(wm831x);
71 static const struct dev_pm_ops wm831x_spi_pm = {
72 .freeze = wm831x_spi_suspend,
73 .suspend = wm831x_spi_suspend,
76 static const struct spi_device_id wm831x_spi_ids[] = {
86 MODULE_DEVICE_TABLE(spi, wm831x_spi_id);
88 static struct spi_driver wm831x_spi_driver = {
95 .id_table = wm831x_spi_ids,
96 .probe = wm831x_spi_probe,
97 .remove = __devexit_p(wm831x_spi_remove),
100 static int __init wm831x_spi_init(void)
104 ret = spi_register_driver(&wm831x_spi_driver);
106 pr_err("Failed to register WM831x SPI driver: %d\n", ret);
110 subsys_initcall(wm831x_spi_init);
112 static void __exit wm831x_spi_exit(void)
114 spi_unregister_driver(&wm831x_spi_driver);
116 module_exit(wm831x_spi_exit);
118 MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
119 MODULE_LICENSE("GPL");
120 MODULE_AUTHOR("Mark Brown");