--- /dev/null
+From e989473bea15beef8d480b822a619e7b8fca860c Mon Sep 17 00:00:00 2001
+From: "Manjunathappa, Prakash" <prakash.pm@ti.com>
+Date: Mon, 1 Aug 2011 18:25:11 +0530
+Subject: [PATCH 2/5] backlight: Add TLC59108 backlight control driver
+
+This patch adds support for I2C configurable TLC59108 backlight
+control driver.
+
+Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
+Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
+---
+ drivers/video/backlight/Kconfig | 8 ++
+ drivers/video/backlight/Makefile | 1 +
+ drivers/video/backlight/tlc59108.c | 160 ++++++++++++++++++++++++++++++++++++
+ 3 files changed, 169 insertions(+)
+ create mode 100644 drivers/video/backlight/tlc59108.c
+
+diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
+index db10d01..04a2275 100644
+--- a/drivers/video/backlight/Kconfig
++++ b/drivers/video/backlight/Kconfig
+@@ -418,6 +418,14 @@ config BACKLIGHT_AS3711
+ If you have an Austrian Microsystems AS3711 say Y to enable the
+ backlight driver.
+
++config BACKLIGHT_TLC59108
++ tristate "TLC59108 LCD Backlight Driver"
++ depends on I2C && BACKLIGHT_CLASS_DEVICE
++ default n
++ help
++ If you have an LCD Panel with backlight control via TLC59108,
++ say Y to enable its LCD control driver.
++
+ endif # BACKLIGHT_CLASS_DEVICE
+
+ endif # BACKLIGHT_LCD_SUPPORT
+diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
+index 96c4d62..3687852 100644
+--- a/drivers/video/backlight/Makefile
++++ b/drivers/video/backlight/Makefile
+@@ -41,6 +41,7 @@ obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o
+ obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o
+ obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o
+ obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o
++obj-$(CONFIG_BACKLIGHT_TLC59108) += tlc59108.o
+ obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o
+ obj-$(CONFIG_BACKLIGHT_PANDORA) += pandora_bl.o
+ obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o
+diff --git a/drivers/video/backlight/tlc59108.c b/drivers/video/backlight/tlc59108.c
+new file mode 100644
+index 0000000..4f4ea34
+--- /dev/null
++++ b/drivers/video/backlight/tlc59108.c
+@@ -0,0 +1,160 @@
++/*
++ * ti81xxhdmi_tlc59108.c
++ *
++ * Copyright (C) 2011 Texas Instruments
++ * Author: Senthil Natarajan
++ *
++ * tlc59108 HDMI Driver
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful, but WITHOUT
++ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
++ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
++ * more details.
++ *
++ * You should have received a copy of the GNU General Public License along with
++ * this program. If not, see <http://www.gnu.org/licenses/>.
++ * History:
++ *
++ * Senthil Natarajan<senthil.n@ti.com> July 2011 I2C driver for tlc59108
++ * backlight control
++ */
++
++#include <linux/i2c.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/backlight.h>
++#include <linux/fb.h>
++
++#define tlc59108_MODULE_NAME "tlc59108"
++#define TLC59108_MODE1 0x00
++#define TLC59108_PWM2 0x04
++#define TLC59108_LEDOUT0 0x0c
++#define TLC59108_LEDOUT1 0x0d
++#define TLC59108_MAX_BRIGHTNESS 0xFF
++
++struct tlc59108_bl {
++ struct i2c_client *client;
++ struct backlight_device *bl;
++};
++
++static void tlc59108_bl_set_backlight(struct tlc59108_bl *data, int brightness)
++{
++ /* Set Mode1 Register */
++ i2c_smbus_write_byte_data(data->client, TLC59108_MODE1, 0x00);
++
++ /* Set LEDOUT0 Register */
++ i2c_smbus_write_byte_data(data->client, TLC59108_LEDOUT0, 0x21);
++
++ /* Set Backlight Duty Cycle*/
++ i2c_smbus_write_byte_data(data->client, TLC59108_PWM2,
++ brightness & 0xff);
++}
++
++static int tlc59108_bl_get_brightness(struct backlight_device *dev)
++{
++ struct backlight_properties *props = &dev->props;
++
++ return props->brightness;
++}
++
++static int tlc59108_bl_update_status(struct backlight_device *dev)
++{
++ struct backlight_properties *props = &dev->props;
++ struct tlc59108_bl *data = dev_get_drvdata(&dev->dev);
++ int brightness = props->brightness;
++
++ tlc59108_bl_set_backlight(data, brightness);
++
++ return 0;
++}
++
++static const struct backlight_ops bl_ops = {
++ .get_brightness = tlc59108_bl_get_brightness,
++ .update_status = tlc59108_bl_update_status,
++};
++
++static int tlc59108_probe(struct i2c_client *c, const struct i2c_device_id *id)
++{
++ struct backlight_properties props;
++ struct tlc59108_bl *data = kzalloc(sizeof(struct tlc59108_bl),
++ GFP_KERNEL);
++ int ret = 0;
++
++ if (!data)
++ return -ENOMEM;
++
++ i2c_set_clientdata(c, data);
++ data->client = c;
++
++ memset(&props, 0, sizeof(struct backlight_properties));
++ props.max_brightness = TLC59108_MAX_BRIGHTNESS;
++ props.type = BACKLIGHT_RAW;
++ data->bl = backlight_device_register("tlc59108-bl", &c->dev, data,
++ &bl_ops, &props);
++ if (IS_ERR(data->bl)) {
++ ret = PTR_ERR(data->bl);
++ goto err_reg;
++ }
++
++ data->bl->props.brightness = TLC59108_MAX_BRIGHTNESS;
++
++ backlight_update_status(data->bl);
++
++ return 0;
++
++err_reg:
++ data->bl = NULL;
++ kfree(data);
++ return ret;
++}
++
++static int tlc59108_remove(struct i2c_client *c)
++{
++ struct tlc59108_bl *data = i2c_get_clientdata(c);
++
++ backlight_device_unregister(data->bl);
++ data->bl = NULL;
++
++ kfree(data);
++
++ return 0;
++}
++
++/* I2C Device ID table */
++static const struct i2c_device_id tlc59108_id[] = {
++ { "tlc59108", 0 },
++ { }
++};
++MODULE_DEVICE_TABLE(i2c, tlc59108_id);
++
++/* I2C driver data */
++static struct i2c_driver tlc59108_driver = {
++ .driver = {
++ .owner = THIS_MODULE,
++ .name = tlc59108_MODULE_NAME,
++ },
++ .probe = tlc59108_probe,
++ .remove = tlc59108_remove,
++ .id_table = tlc59108_id,
++};
++
++static int __init tlc59108_init(void)
++{
++ return i2c_add_driver(&tlc59108_driver);
++}
++
++static void __exit tlc59108_exit(void)
++{
++ i2c_del_driver(&tlc59108_driver);
++}
++
++module_init(tlc59108_init);
++module_exit(tlc59108_exit);
++
++MODULE_DESCRIPTION("LCD/Backlight control for TLC59108");
++MODULE_AUTHOR("Senthil Natarajan <senthil.n@ti.com>");
++MODULE_LICENSE("GPL v2");
+--
+1.7.10.4
+
projects / ipfire-2.x.git / blobdiff