tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
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;
29
30 da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
31 if (!da9052)
32 return -ENOMEM;
33
34 spi->mode = SPI_MODE_0 | SPI_CPOL;
35 spi->bits_per_word = 8;
36 spi_setup(spi);
37
38 da9052->dev = &spi->dev;
39 da9052->chip_irq = spi->irq;
40
41 spi_set_drvdata(spi, da9052);
42
43 da9052_regmap_config.read_flag_mask = 1;
44 da9052_regmap_config.write_flag_mask = 0;
45
46 da9052->regmap = devm_regmap_init_spi(spi, &da9052_regmap_config);
47 if (IS_ERR(da9052->regmap)) {
48 ret = PTR_ERR(da9052->regmap);
49 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
50 ret);
51 return ret;
52 }
53
54 ret = da9052_device_init(da9052, id->driver_data);
55 if (ret != 0)
56 return ret;
57
58 return 0;
59}
60
61static int da9052_spi_remove(struct spi_device *spi)
62{
63 struct da9052 *da9052 = spi_get_drvdata(spi);
64
65 da9052_device_exit(da9052);
66 return 0;
67}
68
69static struct spi_device_id da9052_spi_id[] = {
70 {"da9052", DA9052},
71 {"da9053-aa", DA9053_AA},
72 {"da9053-ba", DA9053_BA},
73 {"da9053-bb", DA9053_BB},
74 {}
75};
76
77static struct spi_driver da9052_spi_driver = {
78 .probe = da9052_spi_probe,
79 .remove = da9052_spi_remove,
80 .id_table = da9052_spi_id,
81 .driver = {
82 .name = "da9052",
83 .owner = THIS_MODULE,
84 },
85};
86
87static int __init da9052_spi_init(void)
88{
89 int ret;
90
91 ret = spi_register_driver(&da9052_spi_driver);
92 if (ret != 0) {
93 pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
94 return ret;
95 }
96
97 return 0;
98}
99subsys_initcall(da9052_spi_init);
100
101static void __exit da9052_spi_exit(void)
102{
103 spi_unregister_driver(&da9052_spi_driver);
104}
105module_exit(da9052_spi_exit);
106
107MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
108MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
109MODULE_LICENSE("GPL");