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 
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 
42 static 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 
51 static 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 
58 static 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 };
98 MODULE_DEVICE_TABLE(of, ssd130x_of_match);
99 
100 static 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 };
109 module_i2c_driver(ssd130x_i2c_driver);
110 
111 MODULE_DESCRIPTION(DRIVER_DESC);
112 MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
113 MODULE_LICENSE("GPL v2");
114 MODULE_IMPORT_NS(DRM_SSD130X);
115