diff options
Diffstat (limited to 'target/linux/xburst/patches-3.18/006-Add-ili8960-lcd-driver.patch')
| -rw-r--r-- | target/linux/xburst/patches-3.18/006-Add-ili8960-lcd-driver.patch | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-3.18/006-Add-ili8960-lcd-driver.patch b/target/linux/xburst/patches-3.18/006-Add-ili8960-lcd-driver.patch new file mode 100644 index 0000000..906b996 --- /dev/null +++ b/target/linux/xburst/patches-3.18/006-Add-ili8960-lcd-driver.patch @@ -0,0 +1,319 @@ +From 8741ead92bc93e66740237e51b88b8690ebcbba3 Mon Sep 17 00:00:00 2001 +From: Lars-Peter Clausen <lars@metafoo.de> +Date: Sun, 1 Aug 2010 21:19:40 +0200 +Subject: [PATCH 6/7] Add ili8960 lcd driver + +Includes the following changes from the jz-3.5 branch: +- Use module_spi_driver +- Use devm_kzalloc +- Use kstrtoul + +Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> +--- + drivers/video/backlight/Kconfig | 7 + + drivers/video/backlight/Makefile | 1 + + drivers/video/backlight/ili8960.c | 262 +++++++++++++++++++++++++++++++++++++ + 3 files changed, 270 insertions(+) + create mode 100644 drivers/video/backlight/ili8960.c + +diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig +index 8d03924..14adcc6 100644 +--- a/drivers/video/backlight/Kconfig ++++ b/drivers/video/backlight/Kconfig +@@ -59,6 +59,13 @@ config LCD_LTV350QV + + The LTV350QV panel is present on all ATSTK1000 boards. + ++config LCD_ILI8960 ++ tristate "Ilitek ili8960 LCD driver" ++ depends on LCD_CLASS_DEVICE && SPI ++ default n ++ help ++ Driver for the Ilitek ili8960 LCD controller chip. ++ + config LCD_ILI922X + tristate "ILI Technology ILI9221/ILI9222 support" + depends on SPI +diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile +index fcd50b73..1f89974 100644 +--- a/drivers/video/backlight/Makefile ++++ b/drivers/video/backlight/Makefile +@@ -5,6 +5,7 @@ obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o + obj-$(CONFIG_LCD_CORGI) += corgi_lcd.o + obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o + obj-$(CONFIG_LCD_HX8357) += hx8357.o ++obj-$(CONFIG_LCD_ILI8960) += ili8960.o + obj-$(CONFIG_LCD_ILI922X) += ili922x.o + obj-$(CONFIG_LCD_ILI9320) += ili9320.o + obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o +diff --git a/drivers/video/backlight/ili8960.c b/drivers/video/backlight/ili8960.c +new file mode 100644 +index 0000000..61eb815 +--- /dev/null ++++ b/drivers/video/backlight/ili8960.c +@@ -0,0 +1,262 @@ ++/* ++ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> ++ * Driver for Ilitek ili8960 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/delay.h> ++ ++struct ili8960 { ++ struct spi_device *spi; ++ struct lcd_device *lcd; ++ bool enabled; ++ unsigned int brightness; ++}; ++ ++#define ILI8960_REG_BRIGHTNESS 0x03 ++#define ILI8960_REG_POWER 0x05 ++#define ILI8960_REG_CONTRAST 0x0d ++ ++static int ili8960_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 int ili8960_programm_power(struct spi_device *spi, bool enabled) ++{ ++ int ret; ++ ++ if (enabled) ++ mdelay(20); ++ ++ ret = ili8960_write_reg(spi, ILI8960_REG_POWER, enabled ? 0xc7 : 0xc6); ++ ++ if (!enabled) ++ mdelay(20); ++ ++ return ret; ++} ++ ++static int ili8960_set_power(struct lcd_device *lcd, int power) ++{ ++ struct ili8960 *ili8960 = lcd_get_data(lcd); ++ ++ switch (power) { ++ case FB_BLANK_UNBLANK: ++ ili8960->enabled = true; ++ break; ++ default: ++ return 0; ++ } ++ ++ return ili8960_programm_power(ili8960->spi, ili8960->enabled); ++} ++ ++static int ili8960_early_set_power(struct lcd_device *lcd, int power) ++{ ++ struct ili8960 *ili8960 = lcd_get_data(lcd); ++ ++ switch (power) { ++ case FB_BLANK_UNBLANK: ++ return 0; ++ default: ++ ili8960->enabled = false; ++ break; ++ } ++ ++ return ili8960_programm_power(ili8960->spi, ili8960->enabled); ++} ++ ++static int ili8960_get_power(struct lcd_device *lcd) ++{ ++ struct ili8960 *ili8960 = lcd_get_data(lcd); ++ return ili8960->enabled ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; ++} ++ ++static int ili8960_set_contrast(struct lcd_device *lcd, int contrast) ++{ ++ struct ili8960 *ili8960 = lcd_get_data(lcd); ++ ++ return ili8960_write_reg(ili8960->spi, ILI8960_REG_CONTRAST, contrast); ++} ++ ++static int ili8960_set_mode(struct lcd_device *lcd, struct fb_videomode *mode) ++{ ++ if (mode->xres != 320 && mode->yres != 240) ++ return -EINVAL; ++ ++ return 0; ++} ++ ++static int ili8960_set_brightness(struct ili8960 *ili8960, int brightness) ++{ ++ int ret; ++ ++ ret = ili8960_write_reg(ili8960->spi, ILI8960_REG_BRIGHTNESS, brightness); ++ ++ if (ret == 0) ++ ili8960->brightness = brightness; ++ ++ return ret; ++} ++ ++static ssize_t ili8960_show_brightness(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct lcd_device *ld = to_lcd_device(dev); ++ struct ili8960 *ili8960 = lcd_get_data(ld); ++ ++ return sprintf(buf, "%u\n", ili8960->brightness); ++} ++ ++static ssize_t ili8960_store_brightness(struct device *dev, ++ struct device_attribute *attr, const char *buf, size_t count) ++{ ++ struct lcd_device *ld = to_lcd_device(dev); ++ struct ili8960 *ili8960 = lcd_get_data(ld); ++ unsigned long brightness; ++ int ret; ++ ++ ret = kstrtoul(buf, 0, &brightness); ++ if (ret) ++ return ret; ++ ++ if (brightness > 255) ++ return -EINVAL; ++ ++ ili8960_set_brightness(ili8960, brightness); ++ ++ return count; ++} ++ ++ ++static DEVICE_ATTR(brightness, 0644, ili8960_show_brightness, ++ ili8960_store_brightness); ++ ++static struct lcd_ops ili8960_lcd_ops = { ++ .set_power = ili8960_set_power, ++ .early_set_power = ili8960_early_set_power, ++ .get_power = ili8960_get_power, ++ .set_contrast = ili8960_set_contrast, ++ .set_mode = ili8960_set_mode, ++}; ++ ++static int ili8960_probe(struct spi_device *spi) ++{ ++ int ret; ++ struct ili8960 *ili8960; ++ ++ ili8960 = devm_kzalloc(&spi->dev, sizeof(*ili8960), GFP_KERNEL); ++ if (!ili8960) ++ return -ENOMEM; ++ ++ spi->bits_per_word = 8; ++ spi->mode = SPI_MODE_3; ++ ++ ret = spi_setup(spi); ++ if (ret) { ++ dev_err(&spi->dev, "Failed to setup spi\n"); ++ return ret; ++ } ++ ++ ili8960->spi = spi; ++ ++ ili8960->lcd = lcd_device_register("ili8960-lcd", &spi->dev, ili8960, ++ &ili8960_lcd_ops); ++ ++ if (IS_ERR(ili8960->lcd)) { ++ ret = PTR_ERR(ili8960->lcd); ++ dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret); ++ return ret; ++ } ++ ++ ili8960->lcd->props.max_contrast = 255; ++ ++ ret = device_create_file(&ili8960->lcd->dev, &dev_attr_brightness); ++ if (ret) ++ goto err_unregister_lcd; ++ ++ ili8960_programm_power(ili8960->spi, true); ++ ili8960->enabled = true; ++ ++ spi_set_drvdata(spi, ili8960); ++ ++ ili8960_write_reg(spi, 0x13, 0x01); ++ ++ return 0; ++err_unregister_lcd: ++ lcd_device_unregister(ili8960->lcd); ++ return ret; ++} ++ ++static int ili8960_remove(struct spi_device *spi) ++{ ++ struct ili8960 *ili8960 = spi_get_drvdata(spi); ++ ++ device_remove_file(&ili8960->lcd->dev, &dev_attr_brightness); ++ lcd_device_unregister(ili8960->lcd); ++ ++ spi_set_drvdata(spi, NULL); ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++ ++static int ili8960_suspend(struct spi_device *spi, pm_message_t state) ++{ ++ struct ili8960 *ili8960 = spi_get_drvdata(spi); ++ ++ if (ili8960->enabled) ++ ili8960_programm_power(ili8960->spi, false); ++ ++ return 0; ++} ++ ++static int ili8960_resume(struct spi_device *spi) ++{ ++ struct ili8960 *ili8960 = spi_get_drvdata(spi); ++ ++ if (ili8960->enabled) ++ ili8960_programm_power(ili8960->spi, true); ++ ++ return 0; ++} ++ ++#else ++#define ili8960_suspend NULL ++#define ili8960_resume NULL ++#endif ++ ++static struct spi_driver ili8960_driver = { ++ .driver = { ++ .name = "ili8960", ++ .owner = THIS_MODULE, ++ }, ++ .probe = ili8960_probe, ++ .remove = ili8960_remove, ++ .suspend = ili8960_suspend, ++ .resume = ili8960_resume, ++}; ++module_spi_driver(ili8960_driver); ++ ++MODULE_AUTHOR("Lars-Peter Clausen"); ++MODULE_LICENSE("GPL"); ++MODULE_DESCRIPTION("LCD driver for Ilitek ili8960"); ++MODULE_ALIAS("spi:ili8960"); +-- +1.7.10.4 + |