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 | |
20 | static int wm831x_spi_probe(struct spi_device *spi) |
21 | { |
22 | struct wm831x_pdata *pdata = dev_get_platdata(dev: &spi->dev); |
23 | struct wm831x *wm831x; |
24 | enum wm831x_parent type; |
25 | int ret; |
26 | |
27 | type = (uintptr_t)spi_get_device_match_data(sdev: spi); |
28 | if (!type) { |
29 | dev_err(&spi->dev, "Failed to match device\n" ); |
30 | return -ENODEV; |
31 | } |
32 | |
33 | wm831x = devm_kzalloc(dev: &spi->dev, size: 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, data: 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(ptr: wm831x->regmap)) { |
45 | ret = PTR_ERR(ptr: 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, irq: spi->irq); |
55 | } |
56 | |
57 | static 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 | |
64 | static 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 | |
73 | static 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 | |
79 | static 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 | |
90 | static 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 | |
101 | static 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 | } |
111 | subsys_initcall(wm831x_spi_init); |
112 | |