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
arizona_spi_probe(struct spi_device * spi)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
arizona_spi_remove(struct spi_device * spi)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");
116