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
21#include <linux/mfd/arizona/core.h>
22
23#include "arizona.h"
24
25static int arizona_spi_probe(struct spi_device *spi)
26{
27 const struct spi_device_id *id = spi_get_device_id(spi);
28 struct arizona *arizona;
29 const struct regmap_config *regmap_config;
30 int ret, type;
31
32 if (spi->dev.of_node)
33 type = arizona_of_get_type(&spi->dev);
34 else
35 type = id->driver_data;
36
37 switch (type) {
38#ifdef CONFIG_MFD_WM5102
39 case WM5102:
40 regmap_config = &wm5102_spi_regmap;
41 break;
42#endif
43#ifdef CONFIG_MFD_WM5110
44 case WM5110:
45 regmap_config = &wm5110_spi_regmap;
46 break;
47#endif
48 default:
49 dev_err(&spi->dev, "Unknown device type %ld\n",
50 id->driver_data);
51 return -EINVAL;
52 }
53
54 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
55 if (arizona == NULL)
56 return -ENOMEM;
57
58 arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
59 if (IS_ERR(arizona->regmap)) {
60 ret = PTR_ERR(arizona->regmap);
61 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
62 ret);
63 return ret;
64 }
65
66 arizona->type = id->driver_data;
67 arizona->dev = &spi->dev;
68 arizona->irq = spi->irq;
69
70 return arizona_dev_init(arizona);
71}
72
73static int arizona_spi_remove(struct spi_device *spi)
74{
75 struct arizona *arizona = spi_get_drvdata(spi);
76 arizona_dev_exit(arizona);
77 return 0;
78}
79
80static const struct spi_device_id arizona_spi_ids[] = {
81 { "wm5102", WM5102 },
82 { "wm5110", WM5110 },
83 { },
84};
85MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
86
87static struct spi_driver arizona_spi_driver = {
88 .driver = {
89 .name = "arizona",
90 .owner = THIS_MODULE,
91 .pm = &arizona_pm_ops,
92 .of_match_table = of_match_ptr(arizona_of_match),
93 },
94 .probe = arizona_spi_probe,
95 .remove = arizona_spi_remove,
96 .id_table = arizona_spi_ids,
97};
98
99module_spi_driver(arizona_spi_driver);
100
101MODULE_DESCRIPTION("Arizona SPI bus interface");
102MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
103MODULE_LICENSE("GPL");