GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / mfd / arizona-spi.c
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
23 static 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
81 static 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
90 static 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 };
98 MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
99
100 static 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
111 module_spi_driver(arizona_spi_driver);
112
113 MODULE_DESCRIPTION("Arizona SPI bus interface");
114 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
115 MODULE_LICENSE("GPL");