diff options
Diffstat (limited to 'recipes-kernel/linux/linux-handheld-4.0/locomo/0007-video-lcd-add-LoCoMo-LCD-driver.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-handheld-4.0/locomo/0007-video-lcd-add-LoCoMo-LCD-driver.patch | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-handheld-4.0/locomo/0007-video-lcd-add-LoCoMo-LCD-driver.patch b/recipes-kernel/linux/linux-handheld-4.0/locomo/0007-video-lcd-add-LoCoMo-LCD-driver.patch new file mode 100644 index 0000000..f9ea7eb --- /dev/null +++ b/recipes-kernel/linux/linux-handheld-4.0/locomo/0007-video-lcd-add-LoCoMo-LCD-driver.patch @@ -0,0 +1,343 @@ +From b85af3e957277b30a2ef51d605478a292a4be817 Mon Sep 17 00:00:00 2001 +From: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> +Date: Wed, 4 Dec 2013 23:58:34 +0400 +Subject: [PATCH 07/20] video: lcd: add LoCoMo LCD driver + +LoCoMo has some special handling for TFT screens attached to Collie and +Poodle. Implement that as a separate driver. + +Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> +--- + drivers/video/backlight/Kconfig | 10 ++ + drivers/video/backlight/Makefile | 1 + + drivers/video/backlight/locomo_lcd.c | 285 +++++++++++++++++++++++++++++++++++ + 3 files changed, 296 insertions(+) + create mode 100644 drivers/video/backlight/locomo_lcd.c + +diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig +index 540ab64..ba0f43c 100644 +--- a/drivers/video/backlight/Kconfig ++++ b/drivers/video/backlight/Kconfig +@@ -48,6 +48,16 @@ config LCD_LMS283GF05 + SPI driver for Samsung LMS283GF05. This provides basic support + for powering the LCD up/down through a sysfs interface. + ++config LCD_LOCOMO ++ tristate "Sharp LOCOMO LCD Driver" ++ depends on MFD_LOCOMO ++ select IIO ++ help ++ If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to ++ enable the LCD driver. The panel starts up in power ++ off state, so you need this driver in order to see any ++ output. ++ + config LCD_LTV350QV + tristate "Samsung LTV350QV LCD Panel" + depends on SPI_MASTER +diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile +index 2a61b7e..bb360a2 100644 +--- a/drivers/video/backlight/Makefile ++++ b/drivers/video/backlight/Makefile +@@ -11,6 +11,7 @@ obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o + obj-$(CONFIG_LCD_LD9040) += ld9040.o + obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o + obj-$(CONFIG_LCD_LMS501KF03) += lms501kf03.o ++obj-$(CONFIG_LCD_LOCOMO) += locomo_lcd.o + obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o + obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o + obj-$(CONFIG_LCD_S6E63M0) += s6e63m0.o +diff --git a/drivers/video/backlight/locomo_lcd.c b/drivers/video/backlight/locomo_lcd.c +new file mode 100644 +index 0000000..dc316cb +--- /dev/null ++++ b/drivers/video/backlight/locomo_lcd.c +@@ -0,0 +1,285 @@ ++/* ++ * Backlight control code for Sharp Zaurus SL-5500 ++ * ++ * Copyright 2005 John Lenz <lenz@cs.wisc.edu> ++ * Maintainer: Pavel Machek <pavel@ucw.cz> (unless John wants to :-) ++ * GPL v2 ++ * ++ * This driver assumes single CPU. That's okay, because collie is ++ * slightly old hardware, and no one is going to retrofit second CPU to ++ * old PDA. ++ */ ++ ++#include <linux/delay.h> ++#include <linux/fb.h> ++#include <linux/gpio/consumer.h> ++#include <linux/iio/consumer.h> ++#include <linux/lcd.h> ++#include <linux/mfd/locomo.h> ++#include <linux/module.h> ++#include <linux/platform_device.h> ++#include <linux/regmap.h> ++ ++struct locomo_lcd { ++ struct regmap *regmap; ++ struct platform_device *dev; ++ struct locomo_lcd_platform_data *data; ++ int power; ++ struct iio_channel *comadj; ++ struct gpio_desc *vsha, *vshd, *vee, *mod; ++}; ++ ++static void locomo_lcd_on(struct locomo_lcd *lcd) ++{ ++ gpiod_set_value(lcd->vsha, 1); ++ usleep_range(2000, 3000); ++ ++ gpiod_set_value(lcd->vshd, 1); ++ usleep_range(2000, 3000); ++ ++ iio_write_channel_raw(lcd->comadj, lcd->data->comadj); ++ usleep_range(5000, 6000); ++ ++ gpiod_set_value(lcd->vee, 1); ++ usleep_range(10000, 11000); ++ ++ /* TFTCRST | CPSOUT=0 | CPSEN */ ++ regmap_write(lcd->regmap, LOCOMO_TC, 0x01); ++ ++ /* Set CPSD */ ++ regmap_write(lcd->regmap, LOCOMO_CPSD, 6); ++ ++ /* TFTCRST | CPSOUT=0 | CPSEN */ ++ regmap_write(lcd->regmap, LOCOMO_TC, 0x04 | 0x01); ++ usleep_range(10000, 11000); ++ ++ gpiod_set_value(lcd->mod, 1); ++} ++ ++static void locomo_lcd_off(struct locomo_lcd *lcd) ++{ ++ /* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */ ++ regmap_write(lcd->regmap, LOCOMO_TC, 0x06); ++ usleep_range(1000, 2000); ++ ++ gpiod_set_value(lcd->vsha, 0); ++ msleep(110); ++ ++ gpiod_set_value(lcd->vee, 0); ++ msleep(700); ++ ++ iio_write_channel_raw(lcd->comadj, 0); ++ usleep_range(5000, 6000); ++ ++ /* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */ ++ regmap_write(lcd->regmap, LOCOMO_TC, 0); ++ gpiod_set_value(lcd->mod, 0); ++ gpiod_set_value(lcd->vshd, 0); ++} ++ ++static void locomo_lcd_program_adsync(struct locomo_lcd *lcd) ++{ ++ regmap_write(lcd->regmap, LOCOMO_ASD, ++ 6 + 8 + 320 + 30 - 10); ++ regmap_update_bits(lcd->regmap, LOCOMO_ASD, ++ 0x8000, ++ 0x8000); ++ ++ regmap_write(lcd->regmap, LOCOMO_HSD, ++ 6 + 8 + 320 + 30 - 10 - 128 + 4); ++ regmap_update_bits(lcd->regmap, LOCOMO_HSD, ++ 0x8000, ++ 0x8000); ++ ++ regmap_write(lcd->regmap, LOCOMO_HSC, 128 / 8); ++ ++ /* XON */ ++ regmap_write(lcd->regmap, LOCOMO_TADC, 0x80); ++ usleep_range(1000, 1100); ++ ++ /* CLK9MEN */ ++ regmap_update_bits(lcd->regmap, LOCOMO_TADC, ++ 0x10, ++ 0x10); ++ usleep_range(100, 200); ++} ++ ++static void locomo_lcd_disable_adsync(struct locomo_lcd *lcd) ++{ ++ /* ADSTART */ ++ regmap_write(lcd->regmap, LOCOMO_ASD, 0x00); ++ ++ /* 18MHz clock off*/ ++ regmap_write(lcd->regmap, LOCOMO_TADC, 0x00); ++} ++ ++int locomo_lcd_set_power(struct lcd_device *ldev, int power) ++{ ++ struct locomo_lcd *lcd = lcd_get_data(ldev); ++ ++ dev_dbg(&ldev->dev, "LCD power %d (is %d)\n", power, lcd->power); ++ ++ if (!power && lcd->power) ++ locomo_lcd_on(lcd); ++ ++ if (power && !lcd->power) ++ locomo_lcd_off(lcd); ++ ++ lcd->power = power; ++ ++ return 0; ++} ++ ++static int locomo_lcd_get_power(struct lcd_device *ldev) ++{ ++ struct locomo_lcd *lcd = lcd_get_data(ldev); ++ ++ return lcd->power; ++} ++ ++static struct lcd_ops locomo_lcd_ops = { ++ .set_power = locomo_lcd_set_power, ++ .get_power = locomo_lcd_get_power, ++}; ++ ++#ifdef CONFIG_PM_SLEEP ++static int locomo_lcd_suspend(struct device *dev) ++{ ++ struct lcd_device *ldev = dev_get_drvdata(dev); ++ struct locomo_lcd *lcd = lcd_get_data(ldev); ++ ++ locomo_lcd_off(lcd); ++ ++ locomo_lcd_disable_adsync(lcd); ++ ++ return 0; ++} ++ ++static int locomo_lcd_resume(struct device *dev) ++{ ++ struct lcd_device *ldev = dev_get_drvdata(dev); ++ struct locomo_lcd *lcd = lcd_get_data(ldev); ++ ++ locomo_lcd_program_adsync(lcd); ++ ++ if (!lcd->power) ++ locomo_lcd_on(lcd); ++ ++ return 0; ++} ++ ++static SIMPLE_DEV_PM_OPS(locomo_lcd_pm, locomo_lcd_suspend, locomo_lcd_resume); ++#define LOCOMOLCD_PM (&locomo_lcd_pm) ++#else ++#define LOCOMOLCD_PM NULL ++#endif ++ ++static int locomo_lcd_probe(struct platform_device *dev) ++{ ++ struct lcd_device *lcd_dev; ++ struct locomo_lcd *lcd; ++ int rc; ++ ++ lcd = devm_kmalloc(&dev->dev, sizeof(struct locomo_lcd), GFP_KERNEL); ++ if (!lcd) ++ return -ENOMEM; ++ ++ lcd->dev = dev; ++ lcd->power = FB_BLANK_NORMAL; ++ ++ lcd->regmap = dev_get_regmap(dev->dev.parent, NULL); ++ if (!lcd->regmap) ++ return -ENODEV; ++ ++ lcd->data = dev_get_platdata(&dev->dev); ++ if (!lcd->data) ++ return -EINVAL; ++ ++ lcd->vsha = devm_gpiod_get(&dev->dev, "VSHA", GPIOD_OUT_LOW); ++ if (IS_ERR(lcd->vsha)) ++ return PTR_ERR(lcd->vsha); ++ ++ lcd->vshd = devm_gpiod_get(&dev->dev, "VSHD", GPIOD_OUT_LOW); ++ if (IS_ERR(lcd->vshd)) ++ return PTR_ERR(lcd->vshd); ++ ++ lcd->vee = devm_gpiod_get(&dev->dev, "Vee", GPIOD_OUT_LOW); ++ if (IS_ERR(lcd->vee)) ++ return PTR_ERR(lcd->vee); ++ ++ lcd->mod = devm_gpiod_get(&dev->dev, "MOD", GPIOD_OUT_LOW); ++ if (IS_ERR(lcd->mod)) ++ return PTR_ERR(lcd->mod); ++ ++ lcd->comadj = iio_channel_get(&dev->dev, "comadj"); ++ if (IS_ERR(lcd->comadj)) { ++ rc = PTR_ERR(lcd->comadj); ++ if (rc == -ENODEV) ++ rc = -EPROBE_DEFER; ++ ++ return rc; ++ } ++ ++ locomo_lcd_program_adsync(lcd); ++ ++ lcd_dev = devm_lcd_device_register(&dev->dev, "locomo", &dev->dev, lcd, ++ &locomo_lcd_ops); ++ if (IS_ERR(lcd_dev)) { ++ rc = PTR_ERR(lcd_dev); ++ goto err; ++ } ++ ++ platform_set_drvdata(dev, lcd_dev); ++ ++ lcd_set_power(lcd_dev, FB_BLANK_UNBLANK); ++ ++ return 0; ++ ++err: ++ locomo_lcd_disable_adsync(lcd); ++ iio_channel_release(lcd->comadj); ++ ++ return rc; ++} ++ ++static int locomo_lcd_remove(struct platform_device *dev) ++{ ++ struct lcd_device *ldev = platform_get_drvdata(dev); ++ struct locomo_lcd *lcd = lcd_get_data(ldev); ++ ++ locomo_lcd_off(lcd); ++ ++ locomo_lcd_disable_adsync(lcd); ++ ++ iio_channel_release(lcd->comadj); ++ ++ return 0; ++} ++ ++static void locomo_lcd_shutdown(struct platform_device *dev) ++{ ++ struct lcd_device *ldev = platform_get_drvdata(dev); ++ struct locomo_lcd *lcd = lcd_get_data(ldev); ++ ++ locomo_lcd_off(lcd); ++ ++ locomo_lcd_disable_adsync(lcd); ++} ++ ++static struct platform_driver locomo_lcd_driver = { ++ .driver = { ++ .name = "locomo-lcd", ++ .pm = LOCOMOLCD_PM, ++ }, ++ .probe = locomo_lcd_probe, ++ .remove = locomo_lcd_remove, ++ .shutdown = locomo_lcd_shutdown, ++}; ++ ++module_platform_driver(locomo_lcd_driver); ++ ++MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); ++MODULE_AUTHOR("Pavel Machek <pavel@ucw.cz>"); ++MODULE_DESCRIPTION("LoCoMo LCD driver"); ++MODULE_LICENSE("GPL v2"); ++MODULE_ALIAS("platform:locomo-lcd"); +-- +1.9.1 + |