--- /dev/null
+From 2248fb9c47fe7e72c735d6c16aba27bf92e1673a 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 07/21] Add ili8960 lcd driver
+
+---
+ drivers/video/backlight/Kconfig | 7 +
+ drivers/video/backlight/Makefile | 1 +
+ drivers/video/backlight/ili8960.c | 263 +++++++++++++++++++++++++++++++++++++
+ 3 files changed, 271 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/video/backlight/ili8960.c
+
+diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
+index 278aeaa..f617883 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_ILI9320
+ tristate
+ help
+diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
+index fdd1fc4..01ec378 100644
+--- a/drivers/video/backlight/Makefile
++++ b/drivers/video/backlight/Makefile
+@@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o
+ obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o
+ obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o
+ obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
++obj-$(CONFIG_LCD_ILI8960) += ili8960.o
+ obj-$(CONFIG_LCD_ILI9320) += ili9320.o
+ obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
+ obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
+diff --git a/drivers/video/backlight/ili8960.c b/drivers/video/backlight/ili8960.c
+new file mode 100644
+index 0000000..1438e92
+--- /dev/null
++++ b/drivers/video/backlight/ili8960.c
+@@ -0,0 +1,263 @@
++/*
++ * 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/backlight.h>
++#include <linux/delay.h>
++
++struct ili8960 {
++ struct spi_device *spi;
++ struct lcd_device *lcd;
++ struct backlight_device *bl;
++ 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:
++ 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 = strict_strtoul(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,
++ .get_power = ili8960_get_power,
++ .set_contrast = ili8960_set_contrast,
++ .set_mode = ili8960_set_mode,
++};
++
++static int __devinit ili8960_probe(struct spi_device *spi)
++{
++ int ret;
++ struct ili8960 *ili8960;
++
++ ili8960 = kmalloc(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");
++ goto err_free_ili8960;
++ }
++
++ 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);
++ goto err_free_ili8960;
++ }
++
++ 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);
++err_free_ili8960:
++ kfree(ili8960);
++ return ret;
++}
++
++static int __devexit 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);
++ kfree(ili8960);
++ 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 = __devexit_p(ili8960_remove),
++ .suspend = ili8960_suspend,
++ .resume = ili8960_resume,
++};
++
++static int __init ili8960_init(void)
++{
++ return spi_register_driver(&ili8960_driver);
++}
++module_init(ili8960_init);
++
++static void __exit ili8960_exit(void)
++{
++ spi_unregister_driver(&ili8960_driver);
++}
++module_exit(ili8960_exit)
++
++MODULE_AUTHOR("Lars-Peter Clausen");
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("LCD driver for Ilitek ili8960");
++MODULE_ALIAS("spi:ili8960");
+--
+1.7.5.4
+
projects / openwrt.git / blobdiff