+++ /dev/null
-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
-
---- 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
---- 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
---- /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");
projects / openwrt / openwrt.git / blobdiff