1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
*
* Copyright 2009,2010 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.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 __devinit wm831x_spi_probe(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
struct wm831x *wm831x;
enum wm831x_parent type;
int ret;
type = (enum wm831x_parent)id->driver_data;
wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
if (wm831x == NULL)
return -ENOMEM;
spi->bits_per_word = 16;
spi->mode = SPI_MODE_0;
dev_set_drvdata(&spi->dev, wm831x);
wm831x->dev = &spi->dev;
wm831x->regmap = 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);
kfree(wm831x);
return ret;
}
return wm831x_device_init(wm831x, type, spi->irq);
}
static int __devexit wm831x_spi_remove(struct spi_device *spi)
{
struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
wm831x_device_exit(wm831x);
return 0;
}
static int wm831x_spi_suspend(struct device *dev)
{
struct wm831x *wm831x = dev_get_drvdata(dev);
return wm831x_device_suspend(wm831x);
}
static void wm831x_spi_shutdown(struct spi_device *spi)
{
struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
wm831x_device_shutdown(wm831x);
}
static const struct dev_pm_ops wm831x_spi_pm = {
.freeze = wm831x_spi_suspend,
.suspend = wm831x_spi_suspend,
};
static const struct spi_device_id wm831x_spi_ids[] = {
{ "wm8310", WM8310 },
{ "wm8311", WM8311 },
{ "wm8312", WM8312 },
{ "wm8320", WM8320 },
{ "wm8321", WM8321 },
{ "wm8325", WM8325 },
{ "wm8326", WM8326 },
{ },
};
MODULE_DEVICE_TABLE(spi, wm831x_spi_id);
static struct spi_driver wm831x_spi_driver = {
.driver = {
.name = "wm831x",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
.pm = &wm831x_spi_pm,
},
.id_table = wm831x_spi_ids,
.probe = wm831x_spi_probe,
.remove = __devexit_p(wm831x_spi_remove),
.shutdown = wm831x_spi_shutdown,
};
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);
static void __exit wm831x_spi_exit(void)
{
spi_unregister_driver(&wm831x_spi_driver);
}
module_exit(wm831x_spi_exit);
MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Brown");
|
