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 unsigned long type;
32 int ret;
33
34 if (spi->dev.of_node)
35 type = arizona_of_get_type(&spi->dev);
36 else
37 type = id->driver_data;
38
39 switch (type) {
40#ifdef CONFIG_MFD_WM5102
41 case WM5102:
42 regmap_config = &wm5102_spi_regmap;
43 break;
44#endif
45#ifdef CONFIG_MFD_WM5110
46 case WM5110:
47 regmap_config = &wm5110_spi_regmap;
48 break;
49#endif
50 default:
51 dev_err(&spi->dev, "Unknown device type %ld\n",
52 id->driver_data);
53 return -EINVAL;
54 }
55
56 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
57 if (arizona == NULL)
58 return -ENOMEM;
59
60 arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
61 if (IS_ERR(arizona->regmap)) {
62 ret = PTR_ERR(arizona->regmap);
63 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
64 ret);
65 return ret;
66 }
67
68 arizona->type = id->driver_data;
69 arizona->dev = &spi->dev;
70 arizona->irq = spi->irq;
71
72 return arizona_dev_init(arizona);
73}
74
75static int arizona_spi_remove(struct spi_device *spi)
76{
77 struct arizona *arizona = spi_get_drvdata(spi);
78 arizona_dev_exit(arizona);
79 return 0;
80}
81
82static const struct spi_device_id arizona_spi_ids[] = {
83 { "wm5102", WM5102 },
84 { "wm5110", WM5110 },
85 { },
86};
87MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
88
89static struct spi_driver arizona_spi_driver = {
90 .driver = {
91 .name = "arizona",
92 .owner = THIS_MODULE,
93 .pm = &arizona_pm_ops,
94 .of_match_table = of_match_ptr(arizona_of_match),
95 },
96 .probe = arizona_spi_probe,
97 .remove = arizona_spi_remove,
98 .id_table = arizona_spi_ids,
99};
100
101module_spi_driver(arizona_spi_driver);
102
103MODULE_DESCRIPTION("Arizona SPI bus interface");
104MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
105MODULE_LICENSE("GPL");