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-rw-r--r--target/linux/xburst/patches-2.6.34/101-lcm.patch304
1 files changed, 304 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.34/101-lcm.patch b/target/linux/xburst/patches-2.6.34/101-lcm.patch
new file mode 100644
index 0000000000..2b17c8a448
--- /dev/null
+++ b/target/linux/xburst/patches-2.6.34/101-lcm.patch
@@ -0,0 +1,304 @@
+From baf5f6c4f4ec0caf5240b452b75eeab2f96d8bd4 Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Sat, 24 Apr 2010 12:20:56 +0200
+Subject: [PATCH] Add gpm940b0 lcd driver
+
+---
+ drivers/video/backlight/Kconfig | 7 +
+ drivers/video/backlight/Makefile | 1 +
+ drivers/video/backlight/gpm940b0.c | 253 ++++++++++++++++++++++++++++++++++++
+ 3 files changed, 261 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/video/backlight/gpm940b0.c
+
+diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
+index c025c84..0a61f91 100644
+--- a/drivers/video/backlight/Kconfig
++++ b/drivers/video/backlight/Kconfig
+@@ -107,6 +107,13 @@ config LCD_HP700
+ If you have an HP Jornada 700 series handheld (710/720/728)
+ say Y to enable LCD control driver.
+
++config LCD_GPM940B0
++ tristate "Giantplus GPM940B0 LCD and backlight driver"
++ depends on LCD_CLASS_DEVICE && SPI
++ default n
++ help
++ LCD and backlight driver for the Giantplus GPM940B0 LCD module.
++
+ #
+ # Backlight
+ #
+diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
+index 09d1f14..a03ec9c 100644
+--- a/drivers/video/backlight/Makefile
++++ b/drivers/video/backlight/Makefile
+@@ -11,6 +11,7 @@ obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
+ obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
+ obj-$(CONFIG_LCD_TDO24M) += tdo24m.o
+ obj-$(CONFIG_LCD_TOSA) += tosa_lcd.o
++obj-$(CONFIG_LCD_GPM940B0) += gpm940b0.o
+
+ obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
+ obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o
+diff --git a/drivers/video/backlight/gpm940b0.c b/drivers/video/backlight/gpm940b0.c
+new file mode 100644
+index 0000000..879e3ad
+--- /dev/null
++++ b/drivers/video/backlight/gpm940b0.c
+@@ -0,0 +1,253 @@
++/*
++ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
++ * Driver for Giantplus GPM940B0 LCD
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/spi/spi.h>
++#include <linux/lcd.h>
++#include <linux/backlight.h>
++#include <linux/delay.h>
++
++struct gpm940b0 {
++ struct spi_device *spi;
++ struct lcd_device *lcd;
++ struct backlight_device *bl;
++ unsigned enabled:1;
++};
++
++static int gpm940b0_write_reg(struct spi_device *spi, uint8_t reg,
++ uint8_t data)
++{
++ uint8_t buf[2];
++ buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f);
++ buf[1] = data;
++
++ return spi_write(spi, buf, sizeof(buf));
++}
++
++static void gpm940b0_power_disable(struct spi_device *spi)
++{
++ int ret = gpm940b0_write_reg(spi, 0x5, 0xc6) ;
++ if (ret < 0)
++ dev_err(&spi->dev, "Failed to disable power: %d\n", ret);
++}
++
++static void gpm940b0_power_enable(struct spi_device *spi)
++{
++ gpm940b0_write_reg(spi, 0x5, 0xc7);
++}
++
++
++static int gpm940b0_set_power(struct lcd_device *lcd, int power)
++{
++ struct gpm940b0 *gpm940b0 = lcd_get_data(lcd);
++
++ switch (power) {
++ case FB_BLANK_UNBLANK:
++ mdelay(20);
++ gpm940b0->enabled = 1;
++ gpm940b0_power_enable(gpm940b0->spi);
++ break;
++ default:
++ gpm940b0->enabled = 0;
++ gpm940b0_power_disable(gpm940b0->spi);
++ mdelay(20);
++ break;
++ }
++ return 0;
++}
++
++static int gpm940b0_set_contrast(struct lcd_device *lcd, int contrast)
++{
++ struct gpm940b0 *gpm940b0 = lcd_get_data(lcd);
++ gpm940b0_write_reg(gpm940b0->spi, 0x0d, contrast);
++ return 0;
++}
++
++static int gpm940b0_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
++{
++ if (mode->xres != 320 && mode->yres != 240)
++ return -EINVAL;
++
++ return 0;
++}
++
++static ssize_t reg_write(struct device *dev, struct device_attribute *attr,
++ const char *buf, size_t count)
++{
++ char *buf2;
++ uint32_t reg = simple_strtoul(buf, &buf2, 10);
++ uint32_t val = simple_strtoul(buf2 + 1, NULL, 10);
++ struct gpm940b0 *gpm940b0 = dev_get_drvdata(dev);
++
++ if (reg < 0 || val < 0)
++ return -EINVAL;
++
++ gpm940b0_write_reg(gpm940b0->spi, reg, val);
++ return count;
++}
++
++static DEVICE_ATTR(reg, 0644, NULL, reg_write);
++
++static ssize_t gpm940b0_show_brightness(struct device *dev,
++ struct device_attribute *attr, char *buf)
++{
++ int rc = -ENXIO;
++
++ return rc;
++}
++
++static ssize_t gpm940b0_store_brightness(struct device *dev,
++ struct device_attribute *attr, const char *buf, size_t count)
++{
++ char *endp;
++ struct lcd_device *ld = to_lcd_device(dev);
++ struct gpm940b0 *gpm940b0 = lcd_get_data(ld);
++ int brightness = simple_strtoul(buf, &endp, 0);
++
++ if (brightness > 255 || brightness < 0)
++ return -EINVAL;
++
++ gpm940b0_write_reg(gpm940b0->spi, 0x3, brightness);
++
++ return count;
++}
++
++
++static DEVICE_ATTR(brightness, 0644, gpm940b0_show_brightness,
++ gpm940b0_store_brightness);
++
++static struct lcd_ops gpm940b0_lcd_ops = {
++ .set_power = gpm940b0_set_power,
++ .set_contrast = gpm940b0_set_contrast,
++ .set_mode = gpm940b0_set_mode,
++};
++
++static int __devinit gpm940b0_probe(struct spi_device *spi)
++{
++ int ret;
++ struct gpm940b0 *gpm940b0;
++
++ gpm940b0 = kmalloc(sizeof(*gpm940b0), GFP_KERNEL);
++
++ spi->bits_per_word = 8;
++ spi->mode = SPI_MODE_3 | SPI_3WIRE;
++
++ ret = spi_setup(spi);
++ if (ret) {
++ dev_err(&spi->dev, "Failed to setup spi\n");
++ goto err_free_gpm940b0;
++ }
++
++ gpm940b0->spi = spi;
++
++ gpm940b0->lcd = lcd_device_register("gpm940b0-lcd", &spi->dev, gpm940b0,
++ &gpm940b0_lcd_ops);
++
++ if (IS_ERR(gpm940b0->lcd)) {
++ ret = PTR_ERR(gpm940b0->lcd);
++ dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
++ goto err_free_gpm940b0;
++ }
++
++ gpm940b0->lcd->props.max_contrast = 255;
++
++ ret = device_create_file(&spi->dev, &dev_attr_reg);
++ if (ret)
++ goto err_unregister_lcd;
++
++ ret = device_create_file(&gpm940b0->lcd->dev, &dev_attr_brightness);
++ if (ret)
++ goto err_unregister_lcd;
++
++ gpm940b0->enabled = 1;
++ dev_set_drvdata(&spi->dev, gpm940b0);
++
++ gpm940b0_write_reg(spi, 0x13, 0x01);
++ gpm940b0_write_reg(spi, 0x5, 0xc7);
++ return 0;
++err_unregister_lcd:
++ lcd_device_unregister(gpm940b0->lcd);
++err_free_gpm940b0:
++ kfree(gpm940b0);
++ return ret;
++}
++
++static int __devexit gpm940b0_remove(struct spi_device *spi)
++{
++ struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
++#if 0
++ if (gpm940b0->bl)
++ backlight_device_unregister(gpm940b0->bl);
++#endif
++
++ lcd_device_unregister(gpm940b0->lcd);
++
++ spi_set_drvdata(spi, NULL);
++ kfree(gpm940b0);
++ return 0;
++}
++
++#ifdef CONFIG_PM
++
++static int gpm940b0_suspend(struct spi_device *spi, pm_message_t state)
++{
++ struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
++ if (gpm940b0->enabled) {
++ gpm940b0_power_disable(spi);
++ mdelay(10);
++ }
++ return 0;
++}
++
++static int gpm940b0_resume(struct spi_device *spi)
++{
++ struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
++ if (gpm940b0->enabled)
++ gpm940b0_power_enable(spi);
++ return 0;
++}
++
++#else
++#define gpm940b0_suspend NULL
++#define gpm940b0_resume NULL
++#endif
++
++static struct spi_driver gpm940b0_driver = {
++ .driver = {
++ .name = "gpm940b0",
++ .owner = THIS_MODULE,
++ },
++ .probe = gpm940b0_probe,
++ .remove = __devexit_p(gpm940b0_remove),
++ .suspend = gpm940b0_suspend,
++ .resume = gpm940b0_resume,
++};
++
++static int __init gpm940b0_init(void)
++{
++ return spi_register_driver(&gpm940b0_driver);
++}
++module_init(gpm940b0_init);
++
++static void __exit gpm940b0_exit(void)
++{
++ return spi_unregister_driver(&gpm940b0_driver);
++}
++module_exit(gpm940b0_exit)
++
++MODULE_AUTHOR("Lars-Peter Clausen");
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("LCD and backlight controll for Giantplus GPM940B0");
++MODULE_ALIAS("spi:gpm940b0");
+--
+1.5.6.5
+