1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * wm831x-spi.c  --  SPI access for Wolfson WM831x PMICs
4 *
5 * Copyright 2009,2010 Wolfson Microelectronics PLC.
6 *
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/of.h>
13#include <linux/pm.h>
14#include <linux/spi/spi.h>
15#include <linux/regmap.h>
16#include <linux/err.h>
17
18#include <linux/mfd/wm831x/core.h>
19
20static int wm831x_spi_probe(struct spi_device *spi)
21{
22	struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
23	struct wm831x *wm831x;
24	enum wm831x_parent type;
25	int ret;
26
27	type = (uintptr_t)spi_get_device_match_data(spi);
28	if (!type) {
29		dev_err(&spi->dev, "Failed to match device\n");
30		return -ENODEV;
31	}
32
33	wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
34	if (wm831x == NULL)
35		return -ENOMEM;
36
37	spi->mode = SPI_MODE_0;
38
39	spi_set_drvdata(spi, wm831x);
40	wm831x->dev = &spi->dev;
41	wm831x->type = type;
42
43	wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
44	if (IS_ERR(wm831x->regmap)) {
45		ret = PTR_ERR(wm831x->regmap);
46		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
47			ret);
48		return ret;
49	}
50
51	if (pdata)
52		memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
53
54	return wm831x_device_init(wm831x, spi->irq);
55}
56
57static int wm831x_spi_suspend(struct device *dev)
58{
59	struct wm831x *wm831x = dev_get_drvdata(dev);
60
61	return wm831x_device_suspend(wm831x);
62}
63
64static int wm831x_spi_poweroff(struct device *dev)
65{
66	struct wm831x *wm831x = dev_get_drvdata(dev);
67
68	wm831x_device_shutdown(wm831x);
69
70	return 0;
71}
72
73static const struct dev_pm_ops wm831x_spi_pm = {
74	.freeze = wm831x_spi_suspend,
75	.suspend = wm831x_spi_suspend,
76	.poweroff = wm831x_spi_poweroff,
77};
78
79static const struct spi_device_id wm831x_spi_ids[] = {
80	{ "wm8310", WM8310 },
81	{ "wm8311", WM8311 },
82	{ "wm8312", WM8312 },
83	{ "wm8320", WM8320 },
84	{ "wm8321", WM8321 },
85	{ "wm8325", WM8325 },
86	{ "wm8326", WM8326 },
87	{ },
88};
89
90static struct spi_driver wm831x_spi_driver = {
91	.driver = {
92		.name	= "wm831x",
93		.pm	= &wm831x_spi_pm,
94		.of_match_table = of_match_ptr(wm831x_of_match),
95		.suppress_bind_attrs = true,
96	},
97	.id_table	= wm831x_spi_ids,
98	.probe		= wm831x_spi_probe,
99};
100
101static int __init wm831x_spi_init(void)
102{
103	int ret;
104
105	ret = spi_register_driver(&wm831x_spi_driver);
106	if (ret != 0)
107		pr_err("Failed to register WM831x SPI driver: %d\n", ret);
108
109	return 0;
110}
111subsys_initcall(wm831x_spi_init);
112