blob: cdbc7cad326fdb360dd081c02ced384232da8724 [file] [log] [blame]
Ashish Jangamcfe04472011-12-12 20:37:41 +05301/*
2 * SPI access for Dialog DA9052 PMICs.
3 *
4 * Copyright(c) 2011 Dialog Semiconductor Ltd.
5 *
6 * Author: David Dajun Chen <dchen@diasemi.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 as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 */
14
15#include <linux/device.h>
16#include <linux/module.h>
17#include <linux/input.h>
18#include <linux/mfd/core.h>
19#include <linux/spi/spi.h>
20#include <linux/err.h>
21
22#include <linux/mfd/da9052/da9052.h>
23
24static int da9052_spi_probe(struct spi_device *spi)
25{
26 int ret;
27 const struct spi_device_id *id = spi_get_device_id(spi);
28 struct da9052 *da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
29
30 if (!da9052)
31 return -ENOMEM;
32
33 spi->mode = SPI_MODE_0 | SPI_CPOL;
34 spi->bits_per_word = 8;
35 spi_setup(spi);
36
37 da9052->dev = &spi->dev;
38 da9052->chip_irq = spi->irq;
39
40 dev_set_drvdata(&spi->dev, da9052);
41
42 da9052_regmap_config.read_flag_mask = 1;
43 da9052_regmap_config.write_flag_mask = 0;
44
45 da9052->regmap = regmap_init_spi(spi, &da9052_regmap_config);
46 if (IS_ERR(da9052->regmap)) {
47 ret = PTR_ERR(da9052->regmap);
48 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
49 ret);
50 goto err;
51 }
52
53 ret = da9052_device_init(da9052, id->driver_data);
54 if (ret != 0)
55 goto err;
56
57 return 0;
58
59err:
60 kfree(da9052);
61 return ret;
62}
63
64static int da9052_spi_remove(struct spi_device *spi)
65{
66 struct da9052 *da9052 = dev_get_drvdata(&spi->dev);
67
68 da9052_device_exit(da9052);
69 kfree(da9052);
70
71 return 0;
72}
73
74static struct spi_device_id da9052_spi_id[] = {
75 {"da9052", DA9052},
76 {"da9053-aa", DA9053_AA},
77 {"da9053-ba", DA9053_BA},
78 {"da9053-bb", DA9053_BB},
79 {}
80};
81
82static struct spi_driver da9052_spi_driver = {
83 .probe = da9052_spi_probe,
84 .remove = __devexit_p(da9052_spi_remove),
85 .id_table = da9052_spi_id,
86 .driver = {
87 .name = "da9052",
88 .bus = &spi_bus_type,
89 .owner = THIS_MODULE,
90 },
91};
92
93static int __init da9052_spi_init(void)
94{
95 int ret;
96
97 ret = spi_register_driver(&da9052_spi_driver);
98 if (ret != 0) {
99 pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
100 return ret;
101 }
102
103 return 0;
104}
105subsys_initcall(da9052_spi_init);
106
107static void __exit da9052_spi_exit(void)
108{
109 spi_unregister_driver(&da9052_spi_driver);
110}
111module_exit(da9052_spi_exit);
112
113MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
114MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
115MODULE_LICENSE("GPL");