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 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
49static 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
56static 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};
96MODULE_DEVICE_TABLE(of, ssd130x_of_match);
97
98static struct i2c_driver ssd130x_i2c_driver = {
99	.driver = {
100		.name = DRIVER_NAME,
101		.of_match_table = ssd130x_of_match,
102	},
103	.probe = ssd130x_i2c_probe,
104	.remove = ssd130x_i2c_remove,
105	.shutdown = ssd130x_i2c_shutdown,
106};
107module_i2c_driver(ssd130x_i2c_driver);
108
109MODULE_DESCRIPTION(DRIVER_DESC);
110MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
111MODULE_LICENSE("GPL v2");
112MODULE_IMPORT_NS(DRM_SSD130X);
113