117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* DRM driver for Solomon SSD130x OLED displays (I2C bus)
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*
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* Copyright 2022 Red Hat Inc.
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* Author: Javier Martinez Canillas <javierm@redhat.com>
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*
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* Based on drivers/video/fbdev/ssd1307fb.c
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* Copyright 2012 Free Electrons
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include "ssd130x.h"
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#define DRIVER_NAME "ssd130x-i2c"
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#define DRIVER_DESC "DRM driver for Solomon SSD130x OLED displays (I2C)"
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static const struct regmap_config ssd130x_i2c_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int ssd130x_i2c_probe(struct i2c_client *client)
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{
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struct ssd130x_device *ssd130x;
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(client, &ssd130x_i2c_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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ssd130x = ssd130x_probe(&client->dev, regmap);
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if (IS_ERR(ssd130x))
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return PTR_ERR(ssd130x);
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i2c_set_clientdata(client, ssd130x);
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return 0;
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}
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static int ssd130x_i2c_remove(struct i2c_client *client)
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{
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struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
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return ssd130x_remove(ssd130x);
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}
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static void ssd130x_i2c_shutdown(struct i2c_client *client)
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{
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struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
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ssd130x_shutdown(ssd130x);
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}
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static struct ssd130x_deviceinfo ssd130x_ssd1305_deviceinfo = {
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.default_vcomh = 0x34,
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.default_dclk_div = 1,
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.default_dclk_frq = 7,
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};
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static struct ssd130x_deviceinfo ssd130x_ssd1306_deviceinfo = {
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.default_vcomh = 0x20,
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.default_dclk_div = 1,
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.default_dclk_frq = 8,
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.need_chargepump = 1,
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};
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static struct ssd130x_deviceinfo ssd130x_ssd1307_deviceinfo = {
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.default_vcomh = 0x20,
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.default_dclk_div = 2,
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.default_dclk_frq = 12,
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.need_pwm = 1,
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};
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static struct ssd130x_deviceinfo ssd130x_ssd1309_deviceinfo = {
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.default_vcomh = 0x34,
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.default_dclk_div = 1,
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.default_dclk_frq = 10,
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};
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static const struct of_device_id ssd130x_of_match[] = {
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{
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.compatible = "solomon,ssd1305fb-i2c",
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.data = &ssd130x_ssd1305_deviceinfo,
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},
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{
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.compatible = "solomon,ssd1306fb-i2c",
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.data = &ssd130x_ssd1306_deviceinfo,
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},
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{
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.compatible = "solomon,ssd1307fb-i2c",
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.data = &ssd130x_ssd1307_deviceinfo,
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},
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{
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.compatible = "solomon,ssd1309fb-i2c",
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.data = &ssd130x_ssd1309_deviceinfo,
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, ssd130x_of_match);
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static struct i2c_driver ssd130x_i2c_driver = {
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.driver = {
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.name = DRIVER_NAME,
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.of_match_table = ssd130x_of_match,
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},
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.probe_new = ssd130x_i2c_probe,
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.remove = ssd130x_i2c_remove,
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.shutdown = ssd130x_i2c_shutdown,
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};
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module_i2c_driver(ssd130x_i2c_driver);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
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MODULE_LICENSE("GPL v2");
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