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	struct regmap_config config;
27	int ret;
28	const struct spi_device_id *id = spi_get_device_id(spi);
29	struct da9052 *da9052;
30
31	da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
32	if (!da9052)
33		return -ENOMEM;
34
35	spi->mode = SPI_MODE_0;
36	spi->bits_per_word = 8;
37	spi_setup(spi);
38
39	da9052->dev = &spi->dev;
40	da9052->chip_irq = spi->irq;
41
42	spi_set_drvdata(spi, da9052);
43
44	config = da9052_regmap_config;
45	config.read_flag_mask = 1;
46	config.reg_bits = 7;
47	config.pad_bits = 1;
48	config.val_bits = 8;
49	config.use_single_rw = 1;
50
51	da9052->regmap = devm_regmap_init_spi(spi, &config);
52	if (IS_ERR(da9052->regmap)) {
53		ret = PTR_ERR(da9052->regmap);
54		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
55			ret);
56		return ret;
57	}
58
59	ret = da9052_device_init(da9052, id->driver_data);
60	if (ret != 0)
61		return ret;
62
63	return 0;
64}
65
66static int da9052_spi_remove(struct spi_device *spi)
67{
68	struct da9052 *da9052 = spi_get_drvdata(spi);
69
70	da9052_device_exit(da9052);
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	{"da9053-bc", DA9053_BC},
80	{}
81};
82
83static struct spi_driver da9052_spi_driver = {
84	.probe = da9052_spi_probe,
85	.remove = da9052_spi_remove,
86	.id_table = da9052_spi_id,
87	.driver = {
88		.name = "da9052",
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");
116