Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / mfd / da9052-spi.c
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
24 static int __devinit 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_regmap;
56
57         return 0;
58
59 err_regmap:
60         regmap_exit(da9052->regmap);
61 err:
62         kfree(da9052);
63         return ret;
64 }
65
66 static int __devexit da9052_spi_remove(struct spi_device *spi)
67 {
68         struct da9052 *da9052 = dev_get_drvdata(&spi->dev);
69
70         da9052_device_exit(da9052);
71         regmap_exit(da9052->regmap);
72         kfree(da9052);
73
74         return 0;
75 }
76
77 static struct spi_device_id da9052_spi_id[] = {
78         {"da9052", DA9052},
79         {"da9053-aa", DA9053_AA},
80         {"da9053-ba", DA9053_BA},
81         {"da9053-bb", DA9053_BB},
82         {}
83 };
84
85 static struct spi_driver da9052_spi_driver = {
86         .probe = da9052_spi_probe,
87         .remove = __devexit_p(da9052_spi_remove),
88         .id_table = da9052_spi_id,
89         .driver = {
90                 .name = "da9052",
91                 .bus = &spi_bus_type,
92                 .owner = THIS_MODULE,
93         },
94 };
95
96 static int __init da9052_spi_init(void)
97 {
98         int ret;
99
100         ret = spi_register_driver(&da9052_spi_driver);
101         if (ret != 0) {
102                 pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
103                 return ret;
104         }
105
106         return 0;
107 }
108 subsys_initcall(da9052_spi_init);
109
110 static void __exit da9052_spi_exit(void)
111 {
112         spi_unregister_driver(&da9052_spi_driver);
113 }
114 module_exit(da9052_spi_exit);
115
116 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
117 MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
118 MODULE_LICENSE("GPL");