tjh.dev
Linux kernel mirror (for testing)
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linux
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
19static const struct regmap_config ssd130x_i2c_regmap_config = {
20 .reg_bits = 8,
21 .val_bits = 8,
22};
23
24static 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
42static int ssd130x_i2c_remove(struct i2c_client *client)
43{
44 struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
45
46 ssd130x_remove(ssd130x);
47
48 return 0;
49}
50
51static void ssd130x_i2c_shutdown(struct i2c_client *client)
52{
53 struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
54
55 ssd130x_shutdown(ssd130x);
56}
57
58static const struct of_device_id ssd130x_of_match[] = {
59 {
60 .compatible = "sinowealth,sh1106",
61 .data = &ssd130x_variants[SH1106_ID],
62 },
63 {
64 .compatible = "solomon,ssd1305",
65 .data = &ssd130x_variants[SSD1305_ID],
66 },
67 {
68 .compatible = "solomon,ssd1306",
69 .data = &ssd130x_variants[SSD1306_ID],
70 },
71 {
72 .compatible = "solomon,ssd1307",
73 .data = &ssd130x_variants[SSD1307_ID],
74 },
75 {
76 .compatible = "solomon,ssd1309",
77 .data = &ssd130x_variants[SSD1309_ID],
78 },
79 /* Deprecated but kept for backward compatibility */
80 {
81 .compatible = "solomon,ssd1305fb-i2c",
82 .data = &ssd130x_variants[SSD1305_ID],
83 },
84 {
85 .compatible = "solomon,ssd1306fb-i2c",
86 .data = &ssd130x_variants[SSD1306_ID],
87 },
88 {
89 .compatible = "solomon,ssd1307fb-i2c",
90 .data = &ssd130x_variants[SSD1307_ID],
91 },
92 {
93 .compatible = "solomon,ssd1309fb-i2c",
94 .data = &ssd130x_variants[SSD1309_ID],
95 },
96 { /* sentinel */ }
97};
98MODULE_DEVICE_TABLE(of, ssd130x_of_match);
99
100static struct i2c_driver ssd130x_i2c_driver = {
101 .driver = {
102 .name = DRIVER_NAME,
103 .of_match_table = ssd130x_of_match,
104 },
105 .probe_new = ssd130x_i2c_probe,
106 .remove = ssd130x_i2c_remove,
107 .shutdown = ssd130x_i2c_shutdown,
108};
109module_i2c_driver(ssd130x_i2c_driver);
110
111MODULE_DESCRIPTION(DRIVER_DESC);
112MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
113MODULE_LICENSE("GPL v2");
114MODULE_IMPORT_NS(DRM_SSD130X);