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2aa13b9e MB |
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> | |
e85c5f0a | 16 | #include <linux/init.h> |
f6dd8449 CK |
17 | #include <linux/of.h> |
18 | #include <linux/of_device.h> | |
87d1906d | 19 | #include <linux/pm.h> |
2aa13b9e | 20 | #include <linux/spi/spi.h> |
1df5981b MB |
21 | #include <linux/regmap.h> |
22 | #include <linux/err.h> | |
2aa13b9e MB |
23 | |
24 | #include <linux/mfd/wm831x/core.h> | |
25 | ||
f791be49 | 26 | static int wm831x_spi_probe(struct spi_device *spi) |
2aa13b9e | 27 | { |
f6dd8449 | 28 | struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev); |
5570c2f7 | 29 | const struct spi_device_id *id = spi_get_device_id(spi); |
f6dd8449 | 30 | const struct of_device_id *of_id; |
2aa13b9e MB |
31 | struct wm831x *wm831x; |
32 | enum wm831x_parent type; | |
1df5981b | 33 | int ret; |
2aa13b9e | 34 | |
f6dd8449 CK |
35 | if (spi->dev.of_node) { |
36 | of_id = of_match_device(wm831x_of_match, &spi->dev); | |
7b55033f GS |
37 | if (!of_id) { |
38 | dev_err(&spi->dev, "Failed to match device\n"); | |
39 | return -ENODEV; | |
40 | } | |
f6dd8449 CK |
41 | type = (enum wm831x_parent)of_id->data; |
42 | } else { | |
43 | type = (enum wm831x_parent)id->driver_data; | |
44 | } | |
2aa13b9e | 45 | |
d48cbb74 | 46 | wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL); |
2aa13b9e MB |
47 | if (wm831x == NULL) |
48 | return -ENOMEM; | |
49 | ||
2aa13b9e MB |
50 | spi->mode = SPI_MODE_0; |
51 | ||
0c0d2ab0 | 52 | spi_set_drvdata(spi, wm831x); |
2aa13b9e | 53 | wm831x->dev = &spi->dev; |
f6dd8449 | 54 | wm831x->type = type; |
1df5981b | 55 | |
130a7032 | 56 | wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config); |
1df5981b MB |
57 | if (IS_ERR(wm831x->regmap)) { |
58 | ret = PTR_ERR(wm831x->regmap); | |
59 | dev_err(wm831x->dev, "Failed to allocate register map: %d\n", | |
60 | ret); | |
1df5981b MB |
61 | return ret; |
62 | } | |
2aa13b9e | 63 | |
f6dd8449 CK |
64 | if (pdata) |
65 | memcpy(&wm831x->pdata, pdata, sizeof(*pdata)); | |
66 | ||
67 | return wm831x_device_init(wm831x, spi->irq); | |
2aa13b9e MB |
68 | } |
69 | ||
87d1906d | 70 | static int wm831x_spi_suspend(struct device *dev) |
2aa13b9e | 71 | { |
87d1906d | 72 | struct wm831x *wm831x = dev_get_drvdata(dev); |
2aa13b9e MB |
73 | |
74 | return wm831x_device_suspend(wm831x); | |
75 | } | |
76 | ||
b9736a16 | 77 | static int wm831x_spi_poweroff(struct device *dev) |
523d9cfb | 78 | { |
b9736a16 | 79 | struct wm831x *wm831x = dev_get_drvdata(dev); |
523d9cfb MB |
80 | |
81 | wm831x_device_shutdown(wm831x); | |
b9736a16 MB |
82 | |
83 | return 0; | |
523d9cfb MB |
84 | } |
85 | ||
87d1906d MB |
86 | static const struct dev_pm_ops wm831x_spi_pm = { |
87 | .freeze = wm831x_spi_suspend, | |
88 | .suspend = wm831x_spi_suspend, | |
b9736a16 | 89 | .poweroff = wm831x_spi_poweroff, |
87d1906d MB |
90 | }; |
91 | ||
5570c2f7 MB |
92 | static const struct spi_device_id wm831x_spi_ids[] = { |
93 | { "wm8310", WM8310 }, | |
94 | { "wm8311", WM8311 }, | |
95 | { "wm8312", WM8312 }, | |
96 | { "wm8320", WM8320 }, | |
97 | { "wm8321", WM8321 }, | |
98 | { "wm8325", WM8325 }, | |
99 | { "wm8326", WM8326 }, | |
100 | { }, | |
2aa13b9e MB |
101 | }; |
102 | ||
5570c2f7 | 103 | static struct spi_driver wm831x_spi_driver = { |
2aa13b9e | 104 | .driver = { |
5570c2f7 | 105 | .name = "wm831x", |
87d1906d | 106 | .pm = &wm831x_spi_pm, |
f6dd8449 | 107 | .of_match_table = of_match_ptr(wm831x_of_match), |
e85c5f0a | 108 | .suppress_bind_attrs = true, |
412dc11d | 109 | }, |
5570c2f7 | 110 | .id_table = wm831x_spi_ids, |
412dc11d | 111 | .probe = wm831x_spi_probe, |
412dc11d MB |
112 | }; |
113 | ||
2aa13b9e MB |
114 | static int __init wm831x_spi_init(void) |
115 | { | |
116 | int ret; | |
117 | ||
5570c2f7 | 118 | ret = spi_register_driver(&wm831x_spi_driver); |
412dc11d | 119 | if (ret != 0) |
5570c2f7 | 120 | pr_err("Failed to register WM831x SPI driver: %d\n", ret); |
412dc11d | 121 | |
2aa13b9e MB |
122 | return 0; |
123 | } | |
124 | subsys_initcall(wm831x_spi_init); |