tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * arizona-spi.c -- Arizona SPI bus interface
3 *
4 * Copyright 2012 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
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/err.h>
14#include <linux/module.h>
15#include <linux/pm_runtime.h>
16#include <linux/regmap.h>
17#include <linux/regulator/consumer.h>
18#include <linux/slab.h>
19#include <linux/spi/spi.h>
20#include <linux/of.h>
21
22#include <linux/mfd/arizona/core.h>
23
24#include "arizona.h"
25
26static int arizona_spi_probe(struct spi_device *spi)
27{
28 const struct spi_device_id *id = spi_get_device_id(spi);
29 struct arizona *arizona;
30 const struct regmap_config *regmap_config;
31 int ret, type;
32
33 if (spi->dev.of_node)
34 type = arizona_of_get_type(&spi->dev);
35 else
36 type = id->driver_data;
37
38 switch (type) {
39#ifdef CONFIG_MFD_WM5102
40 case WM5102:
41 regmap_config = &wm5102_spi_regmap;
42 break;
43#endif
44#ifdef CONFIG_MFD_WM5110
45 case WM5110:
46 regmap_config = &wm5110_spi_regmap;
47 break;
48#endif
49 default:
50 dev_err(&spi->dev, "Unknown device type %ld\n",
51 id->driver_data);
52 return -EINVAL;
53 }
54
55 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
56 if (arizona == NULL)
57 return -ENOMEM;
58
59 arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
60 if (IS_ERR(arizona->regmap)) {
61 ret = PTR_ERR(arizona->regmap);
62 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
63 ret);
64 return ret;
65 }
66
67 arizona->type = id->driver_data;
68 arizona->dev = &spi->dev;
69 arizona->irq = spi->irq;
70
71 return arizona_dev_init(arizona);
72}
73
74static int arizona_spi_remove(struct spi_device *spi)
75{
76 struct arizona *arizona = spi_get_drvdata(spi);
77 arizona_dev_exit(arizona);
78 return 0;
79}
80
81static const struct spi_device_id arizona_spi_ids[] = {
82 { "wm5102", WM5102 },
83 { "wm5110", WM5110 },
84 { },
85};
86MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
87
88static struct spi_driver arizona_spi_driver = {
89 .driver = {
90 .name = "arizona",
91 .owner = THIS_MODULE,
92 .pm = &arizona_pm_ops,
93 .of_match_table = of_match_ptr(arizona_of_match),
94 },
95 .probe = arizona_spi_probe,
96 .remove = arizona_spi_remove,
97 .id_table = arizona_spi_ids,
98};
99
100module_spi_driver(arizona_spi_driver);
101
102MODULE_DESCRIPTION("Arizona SPI bus interface");
103MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
104MODULE_LICENSE("GPL");