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	return da9052_device_init(da9052, id->driver_data);
60}
61
62static int da9052_spi_remove(struct spi_device *spi)
63{
64	struct da9052 *da9052 = spi_get_drvdata(spi);
65
66	da9052_device_exit(da9052);
67	return 0;
68}
69
70static struct spi_device_id da9052_spi_id[] = {
71	{"da9052", DA9052},
72	{"da9053-aa", DA9053_AA},
73	{"da9053-ba", DA9053_BA},
74	{"da9053-bb", DA9053_BB},
75	{"da9053-bc", DA9053_BC},
76	{}
77};
78
79static struct spi_driver da9052_spi_driver = {
80	.probe = da9052_spi_probe,
81	.remove = da9052_spi_remove,
82	.id_table = da9052_spi_id,
83	.driver = {
84		.name = "da9052",
85	},
86};
87
88static int __init da9052_spi_init(void)
89{
90	int ret;
91
92	ret = spi_register_driver(&da9052_spi_driver);
93	if (ret != 0) {
94		pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
95		return ret;
96	}
97
98	return 0;
99}
100subsys_initcall(da9052_spi_init);
101
102static void __exit da9052_spi_exit(void)
103{
104	spi_unregister_driver(&da9052_spi_driver);
105}
106module_exit(da9052_spi_exit);
107
108MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
109MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
110MODULE_LICENSE("GPL");
111