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2aa13b9e MB |
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> | |
87d1906d | 17 | #include <linux/pm.h> |
2aa13b9e | 18 | #include <linux/spi/spi.h> |
1df5981b MB |
19 | #include <linux/regmap.h> |
20 | #include <linux/err.h> | |
2aa13b9e MB |
21 | |
22 | #include <linux/mfd/wm831x/core.h> | |
23 | ||
2aa13b9e MB |
24 | static int __devinit wm831x_spi_probe(struct spi_device *spi) |
25 | { | |
5570c2f7 | 26 | const struct spi_device_id *id = spi_get_device_id(spi); |
2aa13b9e MB |
27 | struct wm831x *wm831x; |
28 | enum wm831x_parent type; | |
1df5981b | 29 | int ret; |
2aa13b9e | 30 | |
5570c2f7 | 31 | type = (enum wm831x_parent)id->driver_data; |
2aa13b9e | 32 | |
d48cbb74 | 33 | wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL); |
2aa13b9e MB |
34 | if (wm831x == NULL) |
35 | return -ENOMEM; | |
36 | ||
37 | spi->bits_per_word = 16; | |
38 | spi->mode = SPI_MODE_0; | |
39 | ||
40 | dev_set_drvdata(&spi->dev, wm831x); | |
41 | wm831x->dev = &spi->dev; | |
1df5981b | 42 | |
5570c2f7 | 43 | wm831x->regmap = regmap_init_spi(spi, &wm831x_regmap_config); |
1df5981b MB |
44 | if (IS_ERR(wm831x->regmap)) { |
45 | ret = PTR_ERR(wm831x->regmap); | |
46 | dev_err(wm831x->dev, "Failed to allocate register map: %d\n", | |
47 | ret); | |
1df5981b MB |
48 | return ret; |
49 | } | |
2aa13b9e MB |
50 | |
51 | return wm831x_device_init(wm831x, type, spi->irq); | |
52 | } | |
53 | ||
54 | static int __devexit wm831x_spi_remove(struct spi_device *spi) | |
55 | { | |
56 | struct wm831x *wm831x = dev_get_drvdata(&spi->dev); | |
57 | ||
58 | wm831x_device_exit(wm831x); | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
87d1906d | 63 | static int wm831x_spi_suspend(struct device *dev) |
2aa13b9e | 64 | { |
87d1906d | 65 | struct wm831x *wm831x = dev_get_drvdata(dev); |
2aa13b9e MB |
66 | |
67 | return wm831x_device_suspend(wm831x); | |
68 | } | |
69 | ||
523d9cfb MB |
70 | static void wm831x_spi_shutdown(struct spi_device *spi) |
71 | { | |
72 | struct wm831x *wm831x = dev_get_drvdata(&spi->dev); | |
73 | ||
74 | wm831x_device_shutdown(wm831x); | |
75 | } | |
76 | ||
87d1906d MB |
77 | static const struct dev_pm_ops wm831x_spi_pm = { |
78 | .freeze = wm831x_spi_suspend, | |
79 | .suspend = wm831x_spi_suspend, | |
80 | }; | |
81 | ||
5570c2f7 MB |
82 | static const struct spi_device_id wm831x_spi_ids[] = { |
83 | { "wm8310", WM8310 }, | |
84 | { "wm8311", WM8311 }, | |
85 | { "wm8312", WM8312 }, | |
86 | { "wm8320", WM8320 }, | |
87 | { "wm8321", WM8321 }, | |
88 | { "wm8325", WM8325 }, | |
89 | { "wm8326", WM8326 }, | |
90 | { }, | |
2aa13b9e | 91 | }; |
5570c2f7 | 92 | MODULE_DEVICE_TABLE(spi, wm831x_spi_id); |
2aa13b9e | 93 | |
5570c2f7 | 94 | static struct spi_driver wm831x_spi_driver = { |
2aa13b9e | 95 | .driver = { |
5570c2f7 | 96 | .name = "wm831x", |
412dc11d | 97 | .owner = THIS_MODULE, |
87d1906d | 98 | .pm = &wm831x_spi_pm, |
412dc11d | 99 | }, |
5570c2f7 | 100 | .id_table = wm831x_spi_ids, |
412dc11d MB |
101 | .probe = wm831x_spi_probe, |
102 | .remove = __devexit_p(wm831x_spi_remove), | |
523d9cfb | 103 | .shutdown = wm831x_spi_shutdown, |
412dc11d MB |
104 | }; |
105 | ||
2aa13b9e MB |
106 | static int __init wm831x_spi_init(void) |
107 | { | |
108 | int ret; | |
109 | ||
5570c2f7 | 110 | ret = spi_register_driver(&wm831x_spi_driver); |
412dc11d | 111 | if (ret != 0) |
5570c2f7 | 112 | pr_err("Failed to register WM831x SPI driver: %d\n", ret); |
412dc11d | 113 | |
2aa13b9e MB |
114 | return 0; |
115 | } | |
116 | subsys_initcall(wm831x_spi_init); | |
117 | ||
118 | static void __exit wm831x_spi_exit(void) | |
119 | { | |
5570c2f7 | 120 | spi_unregister_driver(&wm831x_spi_driver); |
2aa13b9e MB |
121 | } |
122 | module_exit(wm831x_spi_exit); | |
123 | ||
124 | MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs"); | |
125 | MODULE_LICENSE("GPL"); | |
126 | MODULE_AUTHOR("Mark Brown"); |