Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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;
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         dev_set_drvdata(&spi->dev, 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
61 static int __devexit da9052_spi_remove(struct spi_device *spi)
62 {
63         struct da9052 *da9052 = dev_get_drvdata(&spi->dev);
64
65         da9052_device_exit(da9052);
66         return 0;
67 }
68
69 static 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
77 static struct spi_driver da9052_spi_driver = {
78         .probe = da9052_spi_probe,
79         .remove = __devexit_p(da9052_spi_remove),
80         .id_table = da9052_spi_id,
81         .driver = {
82                 .name = "da9052",
83                 .owner = THIS_MODULE,
84         },
85 };
86
87 static 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 }
99 subsys_initcall(da9052_spi_init);
100
101 static void __exit da9052_spi_exit(void)
102 {
103         spi_unregister_driver(&da9052_spi_driver);
104 }
105 module_exit(da9052_spi_exit);
106
107 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
108 MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
109 MODULE_LICENSE("GPL");