1/*
2 * arizona-spi.c  --  Arizona SPI bus interface
3 *
4 * Copyright 2012 Wolfson Microelectronics plc
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.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 version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/err.h>
14#include <linux/module.h>
15#include <linux/pm_runtime.h>
16#include <linux/regmap.h>
17#include <linux/regulator/consumer.h>
18#include <linux/slab.h>
19#include <linux/spi/spi.h>
20#include <linux/of.h>
21
22#include <linux/mfd/arizona/core.h>
23
24#include "arizona.h"
25
26static int arizona_spi_probe(struct spi_device *spi)
27{
28	const struct spi_device_id *id = spi_get_device_id(spi);
29	struct arizona *arizona;
30	const struct regmap_config *regmap_config = NULL;
31	unsigned long type;
32	int ret;
33
34	if (spi->dev.of_node)
35		type = arizona_of_get_type(&spi->dev);
36	else
37		type = id->driver_data;
38
39	switch (type) {
40	case WM5102:
41		if (IS_ENABLED(CONFIG_MFD_WM5102))
42			regmap_config = &wm5102_spi_regmap;
43		break;
44	case WM5110:
45	case WM8280:
46		if (IS_ENABLED(CONFIG_MFD_WM5110))
47			regmap_config = &wm5110_spi_regmap;
48		break;
49	default:
50		dev_err(&spi->dev, "Unknown device type %ld\n", type);
51		return -EINVAL;
52	}
53
54	if (!regmap_config) {
55		dev_err(&spi->dev,
56			"No kernel support for device type %ld\n", type);
57		return -EINVAL;
58	}
59
60	arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
61	if (arizona == NULL)
62		return -ENOMEM;
63
64	arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
65	if (IS_ERR(arizona->regmap)) {
66		ret = PTR_ERR(arizona->regmap);
67		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
68			ret);
69		return ret;
70	}
71
72	arizona->type = type;
73	arizona->dev = &spi->dev;
74	arizona->irq = spi->irq;
75
76	return arizona_dev_init(arizona);
77}
78
79static int arizona_spi_remove(struct spi_device *spi)
80{
81	struct arizona *arizona = spi_get_drvdata(spi);
82
83	arizona_dev_exit(arizona);
84
85	return 0;
86}
87
88static const struct spi_device_id arizona_spi_ids[] = {
89	{ "wm5102", WM5102 },
90	{ "wm5110", WM5110 },
91	{ "wm8280", WM8280 },
92	{ },
93};
94MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
95
96static struct spi_driver arizona_spi_driver = {
97	.driver = {
98		.name	= "arizona",
99		.pm	= &arizona_pm_ops,
100		.of_match_table	= of_match_ptr(arizona_of_match),
101	},
102	.probe		= arizona_spi_probe,
103	.remove		= arizona_spi_remove,
104	.id_table	= arizona_spi_ids,
105};
106
107module_spi_driver(arizona_spi_driver);
108
109MODULE_DESCRIPTION("Arizona SPI bus interface");
110MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
111MODULE_LICENSE("GPL");
112