1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * arizona-spi.c  --  Arizona SPI bus interface
4 *
5 * Copyright 2012 Wolfson Microelectronics plc
6 *
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 */
9
10#include <linux/err.h>
11#include <linux/module.h>
12#include <linux/pm_runtime.h>
13#include <linux/regmap.h>
14#include <linux/regulator/consumer.h>
15#include <linux/slab.h>
16#include <linux/spi/spi.h>
17#include <linux/of.h>
18
19#include <linux/mfd/arizona/core.h>
20
21#include "arizona.h"
22
23static int arizona_spi_probe(struct spi_device *spi)
24{
25	const struct spi_device_id *id = spi_get_device_id(spi);
26	struct arizona *arizona;
27	const struct regmap_config *regmap_config = NULL;
28	unsigned long type;
29	int ret;
30
31	if (spi->dev.of_node)
32		type = arizona_of_get_type(&spi->dev);
33	else
34		type = id->driver_data;
35
36	switch (type) {
37	case WM5102:
38		if (IS_ENABLED(CONFIG_MFD_WM5102))
39			regmap_config = &wm5102_spi_regmap;
40		break;
41	case WM5110:
42	case WM8280:
43		if (IS_ENABLED(CONFIG_MFD_WM5110))
44			regmap_config = &wm5110_spi_regmap;
45		break;
46	case WM1831:
47	case CS47L24:
48		if (IS_ENABLED(CONFIG_MFD_CS47L24))
49			regmap_config = &cs47l24_spi_regmap;
50		break;
51	default:
52		dev_err(&spi->dev, "Unknown device type %ld\n", type);
53		return -EINVAL;
54	}
55
56	if (!regmap_config) {
57		dev_err(&spi->dev,
58			"No kernel support for device type %ld\n", type);
59		return -EINVAL;
60	}
61
62	arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
63	if (arizona == NULL)
64		return -ENOMEM;
65
66	arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
67	if (IS_ERR(arizona->regmap)) {
68		ret = PTR_ERR(arizona->regmap);
69		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
70			ret);
71		return ret;
72	}
73
74	arizona->type = type;
75	arizona->dev = &spi->dev;
76	arizona->irq = spi->irq;
77
78	return arizona_dev_init(arizona);
79}
80
81static int arizona_spi_remove(struct spi_device *spi)
82{
83	struct arizona *arizona = spi_get_drvdata(spi);
84
85	arizona_dev_exit(arizona);
86
87	return 0;
88}
89
90static const struct spi_device_id arizona_spi_ids[] = {
91	{ "wm5102", WM5102 },
92	{ "wm5110", WM5110 },
93	{ "wm8280", WM8280 },
94	{ "wm1831", WM1831 },
95	{ "cs47l24", CS47L24 },
96	{ },
97};
98MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
99
100static struct spi_driver arizona_spi_driver = {
101	.driver = {
102		.name	= "arizona",
103		.pm	= &arizona_pm_ops,
104		.of_match_table	= of_match_ptr(arizona_of_match),
105	},
106	.probe		= arizona_spi_probe,
107	.remove		= arizona_spi_remove,
108	.id_table	= arizona_spi_ids,
109};
110
111module_spi_driver(arizona_spi_driver);
112
113MODULE_DESCRIPTION("Arizona SPI bus interface");
114MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
115MODULE_LICENSE("GPL");
116