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_new = 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);