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 = NULL;
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 case WM5102:
41 if (IS_ENABLED(CONFIG_MFD_WM5102))
42 regmap_config = &wm5102_spi_regmap;
43 break;
44 case WM5110:
45 case WM8280:
46 if (IS_ENABLED(CONFIG_MFD_WM5110))
47 regmap_config = &wm5110_spi_regmap;
48 break;
49 case WM1831:
50 case CS47L24:
51 if (IS_ENABLED(CONFIG_MFD_CS47L24))
52 regmap_config = &cs47l24_spi_regmap;
53 break;
54 default:
55 dev_err(&spi->dev, "Unknown device type %ld\n", type);
56 return -EINVAL;
57 }
58
59 if (!regmap_config) {
60 dev_err(&spi->dev,
61 "No kernel support for device type %ld\n", type);
62 return -EINVAL;
63 }
64
65 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
66 if (arizona == NULL)
67 return -ENOMEM;
68
69 arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
70 if (IS_ERR(arizona->regmap)) {
71 ret = PTR_ERR(arizona->regmap);
72 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
73 ret);
74 return ret;
75 }
76
77 arizona->type = type;
78 arizona->dev = &spi->dev;
79 arizona->irq = spi->irq;
80
81 return arizona_dev_init(arizona);
82}
83
84static int arizona_spi_remove(struct spi_device *spi)
85{
86 struct arizona *arizona = spi_get_drvdata(spi);
87
88 arizona_dev_exit(arizona);
89
90 return 0;
91}
92
93static const struct spi_device_id arizona_spi_ids[] = {
94 { "wm5102", WM5102 },
95 { "wm5110", WM5110 },
96 { "wm8280", WM8280 },
97 { "wm1831", WM1831 },
98 { "cs47l24", CS47L24 },
99 { },
100};
101MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
102
103static struct spi_driver arizona_spi_driver = {
104 .driver = {
105 .name = "arizona",
106 .pm = &arizona_pm_ops,
107 .of_match_table = of_match_ptr(arizona_of_match),
108 },
109 .probe = arizona_spi_probe,
110 .remove = arizona_spi_remove,
111 .id_table = arizona_spi_ids,
112};
113
114module_spi_driver(arizona_spi_driver);
115
116MODULE_DESCRIPTION("Arizona SPI bus interface");
117MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
118MODULE_LICENSE("GPL");
119