1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * DRM driver for Solomon SSD13xx 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 SSD13xx 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 /* ssd130x family */
58 {
59 .compatible = "sinowealth,sh1106",
60 .data = &ssd130x_variants[SH1106_ID],
61 },
62 {
63 .compatible = "solomon,ssd1305",
64 .data = &ssd130x_variants[SSD1305_ID],
65 },
66 {
67 .compatible = "solomon,ssd1306",
68 .data = &ssd130x_variants[SSD1306_ID],
69 },
70 {
71 .compatible = "solomon,ssd1307",
72 .data = &ssd130x_variants[SSD1307_ID],
73 },
74 {
75 .compatible = "solomon,ssd1309",
76 .data = &ssd130x_variants[SSD1309_ID],
77 },
78 /* Deprecated but kept for backward compatibility */
79 {
80 .compatible = "solomon,ssd1305fb-i2c",
81 .data = &ssd130x_variants[SSD1305_ID],
82 },
83 {
84 .compatible = "solomon,ssd1306fb-i2c",
85 .data = &ssd130x_variants[SSD1306_ID],
86 },
87 {
88 .compatible = "solomon,ssd1307fb-i2c",
89 .data = &ssd130x_variants[SSD1307_ID],
90 },
91 {
92 .compatible = "solomon,ssd1309fb-i2c",
93 .data = &ssd130x_variants[SSD1309_ID],
94 },
95 /* ssd132x family */
96 {
97 .compatible = "solomon,ssd1322",
98 .data = &ssd130x_variants[SSD1322_ID],
99 },
100 {
101 .compatible = "solomon,ssd1325",
102 .data = &ssd130x_variants[SSD1325_ID],
103 },
104 {
105 .compatible = "solomon,ssd1327",
106 .data = &ssd130x_variants[SSD1327_ID],
107 },
108 { /* sentinel */ }
109 };
110 MODULE_DEVICE_TABLE(of, ssd130x_of_match);
111
112 static struct i2c_driver ssd130x_i2c_driver = {
113 .driver = {
114 .name = DRIVER_NAME,
115 .of_match_table = ssd130x_of_match,
116 },
117 .probe = ssd130x_i2c_probe,
118 .remove = ssd130x_i2c_remove,
119 .shutdown = ssd130x_i2c_shutdown,
120 };
121 module_i2c_driver(ssd130x_i2c_driver);
122
123 MODULE_DESCRIPTION(DRIVER_DESC);
124 MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
125 MODULE_LICENSE("GPL v2");
126 MODULE_IMPORT_NS(DRM_SSD130X);
127