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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);
1/*
2 * wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
3 *
4 * Copyright 2009,2010 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 it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/pm.h>
18#include <linux/spi/spi.h>
19#include <linux/regmap.h>
20#include <linux/err.h>
21
22#include <linux/mfd/wm831x/core.h>
23
24static int wm831x_spi_probe(struct spi_device *spi)
25{
26 const struct spi_device_id *id = spi_get_device_id(spi);
27 struct wm831x *wm831x;
28 enum wm831x_parent type;
29 int ret;
30
31 type = (enum wm831x_parent)id->driver_data;
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
42 wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
43 if (IS_ERR(wm831x->regmap)) {
44 ret = PTR_ERR(wm831x->regmap);
45 dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
46 ret);
47 return ret;
48 }
49
50 return wm831x_device_init(wm831x, type, spi->irq);
51}
52
53static int wm831x_spi_remove(struct spi_device *spi)
54{
55 struct wm831x *wm831x = spi_get_drvdata(spi);
56
57 wm831x_device_exit(wm831x);
58
59 return 0;
60}
61
62static int wm831x_spi_suspend(struct device *dev)
63{
64 struct wm831x *wm831x = dev_get_drvdata(dev);
65
66 return wm831x_device_suspend(wm831x);
67}
68
69static int wm831x_spi_poweroff(struct device *dev)
70{
71 struct wm831x *wm831x = dev_get_drvdata(dev);
72
73 wm831x_device_shutdown(wm831x);
74
75 return 0;
76}
77
78static const struct dev_pm_ops wm831x_spi_pm = {
79 .freeze = wm831x_spi_suspend,
80 .suspend = wm831x_spi_suspend,
81 .poweroff = wm831x_spi_poweroff,
82};
83
84static const struct spi_device_id wm831x_spi_ids[] = {
85 { "wm8310", WM8310 },
86 { "wm8311", WM8311 },
87 { "wm8312", WM8312 },
88 { "wm8320", WM8320 },
89 { "wm8321", WM8321 },
90 { "wm8325", WM8325 },
91 { "wm8326", WM8326 },
92 { },
93};
94MODULE_DEVICE_TABLE(spi, wm831x_spi_ids);
95
96static struct spi_driver wm831x_spi_driver = {
97 .driver = {
98 .name = "wm831x",
99 .pm = &wm831x_spi_pm,
100 },
101 .id_table = wm831x_spi_ids,
102 .probe = wm831x_spi_probe,
103 .remove = wm831x_spi_remove,
104};
105
106static int __init wm831x_spi_init(void)
107{
108 int ret;
109
110 ret = spi_register_driver(&wm831x_spi_driver);
111 if (ret != 0)
112 pr_err("Failed to register WM831x SPI driver: %d\n", ret);
113
114 return 0;
115}
116subsys_initcall(wm831x_spi_init);
117
118static void __exit wm831x_spi_exit(void)
119{
120 spi_unregister_driver(&wm831x_spi_driver);
121}
122module_exit(wm831x_spi_exit);
123
124MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
125MODULE_LICENSE("GPL");
126MODULE_AUTHOR("Mark Brown");