diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.34/101-lcm.patch')
| -rw-r--r-- | target/linux/xburst/patches-2.6.34/101-lcm.patch | 304 |
1 files changed, 0 insertions, 304 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 deleted file mode 100644 index 2b17c8a448..0000000000 --- a/target/linux/xburst/patches-2.6.34/101-lcm.patch +++ /dev/null @@ -1,304 +0,0 @@ -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 - |