1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * DRM driver for Solomon SSD130x OLED displays (I2C bus)
4 *
5 * Copyright 2022 Red Hat Inc.
6 * Author: Javier Martinez Canillas <javierm@redhat.com>
7 *
8 * Based on drivers/video/fbdev/ssd1307fb.c
9 * Copyright 2012 Free Electrons
10 */
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13
14 #include "ssd130x.h"
15
16 #define DRIVER_NAME "ssd130x-i2c"
17 #define DRIVER_DESC "DRM driver for Solomon SSD130x OLED displays (I2C)"
18
19 static const struct regmap_config ssd130x_i2c_regmap_config = {
20 .reg_bits = 8,
21 .val_bits = 8,
22 };
23
ssd130x_i2c_probe(struct i2c_client * client)24 static int ssd130x_i2c_probe(struct i2c_client *client)
25 {
26 struct ssd130x_device *ssd130x;
27 struct regmap *regmap;
28
29 regmap = devm_regmap_init_i2c(client, &ssd130x_i2c_regmap_config);
30 if (IS_ERR(regmap))
31 return PTR_ERR(regmap);
32
33 ssd130x = ssd130x_probe(&client->dev, regmap);
34 if (IS_ERR(ssd130x))
35 return PTR_ERR(ssd130x);
36
37 i2c_set_clientdata(client, ssd130x);
38
39 return 0;
40 }
41
ssd130x_i2c_remove(struct i2c_client * client)42 static void ssd130x_i2c_remove(struct i2c_client *client)
43 {
44 struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
45
46 ssd130x_remove(ssd130x);
47 }
48
ssd130x_i2c_shutdown(struct i2c_client * client)49 static void ssd130x_i2c_shutdown(struct i2c_client *client)
50 {
51 struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
52
53 ssd130x_shutdown(ssd130x);
54 }
55
56 static const struct of_device_id ssd130x_of_match[] = {
57 {
58 .compatible = "sinowealth,sh1106",
59 .data = &ssd130x_variants[SH1106_ID],
60 },
61 {
62 .compatible = "solomon,ssd1305",
63 .data = &ssd130x_variants[SSD1305_ID],
64 },
65 {
66 .compatible = "solomon,ssd1306",
67 .data = &ssd130x_variants[SSD1306_ID],
68 },
69 {
70 .compatible = "solomon,ssd1307",
71 .data = &ssd130x_variants[SSD1307_ID],
72 },
73 {
74 .compatible = "solomon,ssd1309",
75 .data = &ssd130x_variants[SSD1309_ID],
76 },
77 /* Deprecated but kept for backward compatibility */
78 {
79 .compatible = "solomon,ssd1305fb-i2c",
80 .data = &ssd130x_variants[SSD1305_ID],
81 },
82 {
83 .compatible = "solomon,ssd1306fb-i2c",
84 .data = &ssd130x_variants[SSD1306_ID],
85 },
86 {
87 .compatible = "solomon,ssd1307fb-i2c",
88 .data = &ssd130x_variants[SSD1307_ID],
89 },
90 {
91 .compatible = "solomon,ssd1309fb-i2c",
92 .data = &ssd130x_variants[SSD1309_ID],
93 },
94 { /* sentinel */ }
95 };
96 MODULE_DEVICE_TABLE(of, ssd130x_of_match);
97
98 static struct i2c_driver ssd130x_i2c_driver = {
99 .driver = {
100 .name = DRIVER_NAME,
101 .of_match_table = ssd130x_of_match,
102 },
103 .probe_new = ssd130x_i2c_probe,
104 .remove = ssd130x_i2c_remove,
105 .shutdown = ssd130x_i2c_shutdown,
106 };
107 module_i2c_driver(ssd130x_i2c_driver);
108
109 MODULE_DESCRIPTION(DRIVER_DESC);
110 MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
111 MODULE_LICENSE("GPL v2");
112 MODULE_IMPORT_NS(DRM_SSD130X);
113