drm/solomon/ssd130x-i2c.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * DRM driver for Solomon SSD130x OLED displays (I2C bus)
0004  *
0005  * Copyright 2022 Red Hat Inc.
0006  * Author: Javier Martinez Canillas <javierm@redhat.com>
0007  *
0008  * Based on drivers/video/fbdev/ssd1307fb.c
0009  * Copyright 2012 Free Electrons
0010  */
0011 #include <linux/i2c.h>
0012 #include <linux/module.h>
0013
0014 #include "ssd130x.h"
0015
0016 #define DRIVER_NAME "ssd130x-i2c"
0017 #define DRIVER_DESC "DRM driver for Solomon SSD130x OLED displays (I2C)"
0018
0019 static const struct regmap_config ssd130x_i2c_regmap_config = {
0020     .reg_bits = 8,
0021     .val_bits = 8,
0022 };
0023
0024 static int ssd130x_i2c_probe(struct i2c_client *client)
0025 {
0026     struct ssd130x_device *ssd130x;
0027     struct regmap *regmap;
0028
0029     regmap = devm_regmap_init_i2c(client, &ssd130x_i2c_regmap_config);
0030     if (IS_ERR(regmap))
0031         return PTR_ERR(regmap);
0032
0033     ssd130x = ssd130x_probe(&client->dev, regmap);
0034     if (IS_ERR(ssd130x))
0035         return PTR_ERR(ssd130x);
0036
0037     i2c_set_clientdata(client, ssd130x);
0038
0039     return 0;
0040 }
0041
0042 static int ssd130x_i2c_remove(struct i2c_client *client)
0043 {
0044     struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
0045
0046     ssd130x_remove(ssd130x);
0047
0048     return 0;
0049 }
0050
0051 static void ssd130x_i2c_shutdown(struct i2c_client *client)
0052 {
0053     struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
0054
0055     ssd130x_shutdown(ssd130x);
0056 }
0057
0058 static const struct of_device_id ssd130x_of_match[] = {
0059     {
0060         .compatible = "sinowealth,sh1106",
0061         .data = &ssd130x_variants[SH1106_ID],
0062     },
0063     {
0064         .compatible = "solomon,ssd1305",
0065         .data = &ssd130x_variants[SSD1305_ID],
0066     },
0067     {
0068         .compatible = "solomon,ssd1306",
0069         .data = &ssd130x_variants[SSD1306_ID],
0070     },
0071     {
0072         .compatible = "solomon,ssd1307",
0073         .data = &ssd130x_variants[SSD1307_ID],
0074     },
0075     {
0076         .compatible = "solomon,ssd1309",
0077         .data = &ssd130x_variants[SSD1309_ID],
0078     },
0079     /* Deprecated but kept for backward compatibility */
0080     {
0081         .compatible = "solomon,ssd1305fb-i2c",
0082         .data = &ssd130x_variants[SSD1305_ID],
0083     },
0084     {
0085         .compatible = "solomon,ssd1306fb-i2c",
0086         .data = &ssd130x_variants[SSD1306_ID],
0087     },
0088     {
0089         .compatible = "solomon,ssd1307fb-i2c",
0090         .data = &ssd130x_variants[SSD1307_ID],
0091     },
0092     {
0093         .compatible = "solomon,ssd1309fb-i2c",
0094         .data = &ssd130x_variants[SSD1309_ID],
0095     },
0096     { /* sentinel */ }
0097 };
0098 MODULE_DEVICE_TABLE(of, ssd130x_of_match);
0099
0100 static struct i2c_driver ssd130x_i2c_driver = {
0101     .driver = {
0102         .name = DRIVER_NAME,
0103         .of_match_table = ssd130x_of_match,
0104     },
0105     .probe_new = ssd130x_i2c_probe,
0106     .remove = ssd130x_i2c_remove,
0107     .shutdown = ssd130x_i2c_shutdown,
0108 };
0109 module_i2c_driver(ssd130x_i2c_driver);
0110
0111 MODULE_DESCRIPTION(DRIVER_DESC);
0112 MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
0113 MODULE_LICENSE("GPL v2");
0114 MODULE_IMPORT_NS(DRM_SSD130X);