| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20220209091204.2513437-1-javierm@redhat.com>
Date: Wed, 9 Feb 2022 10:12:04 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Maxime Ripard <maxime@...no.tech>,
Noralf Trønnes <noralf@...nnes.org>,
dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
Javier Martinez Canillas <javierm@...hat.com>
Subject: [PATCH v3 5/7] (WIP) drm/solomon: Add SSD130X OLED displays SPI 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 SPI.
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---
Changes in v3:
- Add a separate driver for SSD130X chips SPI support (Andy Shevchenko)
drivers/gpu/drm/solomon/Kconfig | 9 ++
drivers/gpu/drm/solomon/Makefile | 1 +
drivers/gpu/drm/solomon/ssd130x-spi.c | 114 ++++++++++++++++++++++++++
3 files changed, 124 insertions(+)
create mode 100644 drivers/gpu/drm/solomon/ssd130x-spi.c
diff --git a/drivers/gpu/drm/solomon/Kconfig b/drivers/gpu/drm/solomon/Kconfig
index 47e16bc20e0d..16a2098f438c 100644
--- a/drivers/gpu/drm/solomon/Kconfig
+++ b/drivers/gpu/drm/solomon/Kconfig
@@ -19,3 +19,12 @@ config DRM_SSD130X_I2C
Say Y here if the SSD130X OLED display is connected via I2C bus.
If M is selected the module will be called ssd130x-i2c.
+
+config DRM_SSD130X_SPI
+ tristate "DRM support for Solomon SSD130X OLED displays (SPI bus)"
+ depends on DRM_SSD130X && SPI
+ select REGMAP_SPI
+ help
+ Say Y here if the SSD130X OLED display is connected via SPI bus.
+
+ If M is selected the module will be called ssd130x-spi.
diff --git a/drivers/gpu/drm/solomon/Makefile b/drivers/gpu/drm/solomon/Makefile
index 4bfc5acb0447..b5fc792257d7 100644
--- a/drivers/gpu/drm/solomon/Makefile
+++ b/drivers/gpu/drm/solomon/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_DRM_SSD130X) += ssd130x.o
obj-$(CONFIG_DRM_SSD130X_I2C) += ssd130x-i2c.o
+obj-$(CONFIG_DRM_SSD130X_SPI) += ssd130x-spi.o
diff --git a/drivers/gpu/drm/solomon/ssd130x-spi.c b/drivers/gpu/drm/solomon/ssd130x-spi.c
new file mode 100644
index 000000000000..ccc56d2f3026
--- /dev/null
+++ b/drivers/gpu/drm/solomon/ssd130x-spi.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DRM driver for Solomon SSD130X OLED displays (SPI bus)
+ *
+ * Copyright 2022 Red Hat Inc.
+ * Authors: Javier Martinez Canillas <javierm@...hat.com>
+ */
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+
+#include "ssd130x.h"
+
+#define DRIVER_NAME "ssd130x-spi"
+#define DRIVER_DESC "DRM driver for Solomon SSD130X OLED displays (SPI)"
+
+static const struct regmap_config ssd130x_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int ssd130x_spi_probe(struct spi_device *spi)
+{
+ struct ssd130x_device *ssd130x;
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &ssd130x_spi_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ ssd130x = ssd130x_probe(&spi->dev, regmap);
+
+ if (IS_ERR(ssd130x))
+ return PTR_ERR(ssd130x);
+
+ spi_set_drvdata(spi, ssd130x);
+
+ return 0;
+}
+
+static int ssd130x_spi_remove(struct spi_device *spi)
+{
+ struct ssd130x_device *ssd130x = spi_get_drvdata(spi);
+
+ return ssd130x_remove(ssd130x);
+}
+
+static void ssd130x_spi_shutdown(struct spi_device *spi)
+{
+ struct ssd130x_device *ssd130x = spi_get_drvdata(spi);
+
+ 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-spi",
+ .data = (void *)&ssd130x_ssd1305_deviceinfo,
+ },
+ {
+ .compatible = "solomon,ssd1306fb-spi",
+ .data = (void *)&ssd130x_ssd1306_deviceinfo,
+ },
+ {
+ .compatible = "solomon,ssd1307fb-spi",
+ .data = (void *)&ssd130x_ssd1307_deviceinfo,
+ },
+ {
+ .compatible = "solomon,ssd1309fb-spi",
+ .data = (void *)&ssd130x_ssd1309_deviceinfo,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ssd130x_of_match);
+
+static struct spi_driver ssd130x_spi_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = ssd130x_of_match,
+ },
+ .probe = ssd130x_spi_probe,
+ .remove = ssd130x_spi_remove,
+ .shutdown = ssd130x_spi_shutdown,
+};
+module_spi_driver(ssd130x_spi_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Javier Martinez Canillas <javierm@...hat.com>");
+MODULE_LICENSE("GPL v2");
--
2.34.1
Powered by blists - more mailing lists