diff options
author | Javier Martinez Canillas <javierm@redhat.com> | 2022-02-14 14:37:08 +0100 |
---|---|---|
committer | Javier Martinez Canillas <javierm@redhat.com> | 2022-02-16 13:29:04 +0100 |
commit | d12dd1db809a3f298b4ef6cc02ca64fe3038391d (patch) | |
tree | 1a6f5050c19e54320c6bf07f21c9b91cf8a35a21 | |
parent | a61732e808672cfa8c8c6028bcf9feacb953ef40 (diff) | |
download | linux-stable-d12dd1db809a3f298b4ef6cc02ca64fe3038391d.tar.gz linux-stable-d12dd1db809a3f298b4ef6cc02ca64fe3038391d.tar.bz2 linux-stable-d12dd1db809a3f298b4ef6cc02ca64fe3038391d.zip |
drm/solomon: Add SSD130x OLED displays I2C support
The ssd130x driver only provides the core support for these devices but it
does not have any bus transport logic. Add a driver to interface over I2C.
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220214133710.3278506-5-javierm@redhat.com
-rw-r--r-- | drivers/gpu/drm/solomon/Kconfig | 9 | ||||
-rw-r--r-- | drivers/gpu/drm/solomon/Makefile | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/solomon/ssd130x-i2c.c | 116 |
3 files changed, 126 insertions, 0 deletions
diff --git a/drivers/gpu/drm/solomon/Kconfig b/drivers/gpu/drm/solomon/Kconfig index 7720a7039e8d..5861c3ab7c45 100644 --- a/drivers/gpu/drm/solomon/Kconfig +++ b/drivers/gpu/drm/solomon/Kconfig @@ -10,3 +10,12 @@ config DRM_SSD130X the appropriate bus transport in your chip also must be selected. If M is selected the module will be called ssd130x. + +config DRM_SSD130X_I2C + tristate "DRM support for Solomon SSD130x OLED displays (I2C bus)" + depends on DRM_SSD130X && I2C + select REGMAP_I2C + help + Say Y here if the SSD130x OLED display is connected via I2C bus. + + If M is selected the module will be called ssd130x-i2c. diff --git a/drivers/gpu/drm/solomon/Makefile b/drivers/gpu/drm/solomon/Makefile index f685addb19fe..4bfc5acb0447 100644 --- a/drivers/gpu/drm/solomon/Makefile +++ b/drivers/gpu/drm/solomon/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_DRM_SSD130X) += ssd130x.o +obj-$(CONFIG_DRM_SSD130X_I2C) += ssd130x-i2c.o diff --git a/drivers/gpu/drm/solomon/ssd130x-i2c.c b/drivers/gpu/drm/solomon/ssd130x-i2c.c new file mode 100644 index 000000000000..3126aeda4ced --- /dev/null +++ b/drivers/gpu/drm/solomon/ssd130x-i2c.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * DRM driver for Solomon SSD130x OLED displays (I2C bus) + * + * Copyright 2022 Red Hat Inc. + * Author: Javier Martinez Canillas <javierm@redhat.com> + * + * Based on drivers/video/fbdev/ssd1307fb.c + * Copyright 2012 Free Electrons + */ +#include <linux/i2c.h> +#include <linux/module.h> + +#include "ssd130x.h" + +#define DRIVER_NAME "ssd130x-i2c" +#define DRIVER_DESC "DRM driver for Solomon SSD130x OLED displays (I2C)" + +static const struct regmap_config ssd130x_i2c_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int ssd130x_i2c_probe(struct i2c_client *client) +{ + struct ssd130x_device *ssd130x; + struct regmap *regmap; + + regmap = devm_regmap_init_i2c(client, &ssd130x_i2c_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + ssd130x = ssd130x_probe(&client->dev, regmap); + if (IS_ERR(ssd130x)) + return PTR_ERR(ssd130x); + + i2c_set_clientdata(client, ssd130x); + + return 0; +} + +static int ssd130x_i2c_remove(struct i2c_client *client) +{ + struct ssd130x_device *ssd130x = i2c_get_clientdata(client); + + return ssd130x_remove(ssd130x); +} + +static void ssd130x_i2c_shutdown(struct i2c_client *client) +{ + struct ssd130x_device *ssd130x = i2c_get_clientdata(client); + + ssd130x_shutdown(ssd130x); +} + +static struct ssd130x_deviceinfo ssd130x_ssd1305_deviceinfo = { + .default_vcomh = 0x34, + .default_dclk_div = 1, + .default_dclk_frq = 7, +}; + +static struct ssd130x_deviceinfo ssd130x_ssd1306_deviceinfo = { + .default_vcomh = 0x20, + .default_dclk_div = 1, + .default_dclk_frq = 8, + .need_chargepump = 1, +}; + +static struct ssd130x_deviceinfo ssd130x_ssd1307_deviceinfo = { + .default_vcomh = 0x20, + .default_dclk_div = 2, + .default_dclk_frq = 12, + .need_pwm = 1, +}; + +static struct ssd130x_deviceinfo ssd130x_ssd1309_deviceinfo = { + .default_vcomh = 0x34, + .default_dclk_div = 1, + .default_dclk_frq = 10, +}; + +static const struct of_device_id ssd130x_of_match[] = { + { + .compatible = "solomon,ssd1305fb-i2c", + .data = &ssd130x_ssd1305_deviceinfo, + }, + { + .compatible = "solomon,ssd1306fb-i2c", + .data = &ssd130x_ssd1306_deviceinfo, + }, + { + .compatible = "solomon,ssd1307fb-i2c", + .data = &ssd130x_ssd1307_deviceinfo, + }, + { + .compatible = "solomon,ssd1309fb-i2c", + .data = &ssd130x_ssd1309_deviceinfo, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ssd130x_of_match); + +static struct i2c_driver ssd130x_i2c_driver = { + .driver = { + .name = DRIVER_NAME, + .of_match_table = ssd130x_of_match, + }, + .probe_new = ssd130x_i2c_probe, + .remove = ssd130x_i2c_remove, + .shutdown = ssd130x_i2c_shutdown, +}; +module_i2c_driver(ssd130x_i2c_driver); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>"); +MODULE_LICENSE("GPL v2"); |