The patch titled
backlight: LOCOMO Backlight Driver updates
has been added to the -mm tree. Its filename is
backlight-locomo-backlight-driver-updates.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Richard Purdie <rpurdie@xxxxxxxxx>
Add backlight intensity control to the LOCOMO lcd/backlight driver using the
backlight class and add basic power management support.
This is a reimplementation and improvement of patches by John Lenz and Pavel
Machek
Signed-off-by: Richard Purdie <rpurdie@xxxxxxxxx>
Signed-off-by: Antonino Daplas <adaplas@xxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/arm/common/locomo.c | 45 +++++----
drivers/video/backlight/Kconfig | 8 +
drivers/video/backlight/Makefile | 2
drivers/video/backlight/locomolcd.c | 123 ++++++++++++++++++++++----
include/asm-arm/hardware/locomo.h | 5 +
5 files changed, 146 insertions(+), 37 deletions(-)
diff -puN arch/arm/common/locomo.c~backlight-locomo-backlight-driver-updates arch/arm/common/locomo.c
--- devel/arch/arm/common/locomo.c~backlight-locomo-backlight-driver-updates 2006-04-22 01:10:58.000000000 -0700
+++ devel-akpm/arch/arm/common/locomo.c 2006-04-22 01:10:58.000000000 -0700
@@ -629,21 +629,6 @@ static int locomo_resume(struct platform
#endif
-#define LCM_ALC_EN 0x8000
-
-void frontlight_set(struct locomo *lchip, int duty, int vr, int bpwf)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&lchip->lock, flags);
- locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
- udelay(100);
- locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
- locomo_writel(bpwf | LCM_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
- spin_unlock_irqrestore(&lchip->lock, flags);
-}
-
-
/**
* locomo_probe - probe for a single LoCoMo chip.
* @phys_addr: physical address of device.
@@ -698,14 +683,10 @@ __locomo_probe(struct device *me, struct
, lchip->base + LOCOMO_GPD);
locomo_writel(0, lchip->base + LOCOMO_GIE);
- /* FrontLight */
+ /* Frontlight */
locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
- /* Same constants can be used for collie and poodle
- (depending on CONFIG options in original sharp code)? */
- frontlight_set(lchip, 163, 0, 148);
-
/* Longtime timer */
locomo_writel(0, lchip->base + LOCOMO_LTINT);
/* SPI */
@@ -1063,6 +1044,30 @@ void locomo_m62332_senddata(struct locom
}
/*
+ * Frontlight control
+ */
+
+static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
+
+void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
+{
+ unsigned long flags;
+ struct locomo *lchip = locomo_chip_driver(dev);
+
+ if (vr)
+ locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 1);
+ else
+ locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 0);
+
+ spin_lock_irqsave(&lchip->lock, flags);
+ locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
+ udelay(100);
+ locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
+ locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
+ spin_unlock_irqrestore(&lchip->lock, flags);
+}
+
+/*
* LoCoMo "Register Access Bus."
*
* We model this as a regular bus type, and hang devices directly
diff -puN drivers/video/backlight/Kconfig~backlight-locomo-backlight-driver-updates drivers/video/backlight/Kconfig
--- devel/drivers/video/backlight/Kconfig~backlight-locomo-backlight-driver-updates 2006-04-22 01:10:58.000000000 -0700
+++ devel-akpm/drivers/video/backlight/Kconfig 2006-04-22 01:10:58.000000000 -0700
@@ -50,6 +50,14 @@ config BACKLIGHT_CORGI
If you have a Sharp Zaurus SL-C7xx, SL-Cxx00 or SL-6000x say y to enable the
backlight driver.
+config BACKLIGHT_LOCOMO
+ tristate "Sharp LOCOMO LCD/Backlight Driver"
+ depends on BACKLIGHT_DEVICE && SHARP_LOCOMO
+ default y
+ help
+ If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to
+ enable the LCD/backlight driver.
+
config BACKLIGHT_HP680
tristate "HP Jornada 680 Backlight Driver"
depends on BACKLIGHT_DEVICE && SH_HP6XX
diff -puN drivers/video/backlight/locomolcd.c~backlight-locomo-backlight-driver-updates drivers/video/backlight/locomolcd.c
--- devel/drivers/video/backlight/locomolcd.c~backlight-locomo-backlight-driver-updates 2006-04-22 01:10:58.000000000 -0700
+++ devel-akpm/drivers/video/backlight/locomolcd.c 2006-04-22 01:10:58.000000000 -0700
@@ -17,6 +17,8 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
#include <asm/hardware/locomo.h>
#include <asm/irq.h>
@@ -25,7 +27,10 @@
#include "../../../arch/arm/mach-sa1100/generic.h"
+static struct backlight_device *locomolcd_bl_device;
static struct locomo_dev *locomolcd_dev;
+static unsigned long locomolcd_flags;
+#define LOCOMOLCD_SUSPENDED 0x01
static void locomolcd_on(int comadj)
{
@@ -89,12 +94,10 @@ void locomolcd_power(int on)
}
/* read comadj */
- if (comadj == -1) {
- if (machine_is_poodle())
- comadj = 118;
- if (machine_is_collie())
- comadj = 128;
- }
+ if (comadj == -1 && machine_is_collie())
+ comadj = 128;
+ if (comadj == -1 && machine_is_poodle())
+ comadj = 118;
if (on)
locomolcd_on(comadj);
@@ -105,26 +108,100 @@ void locomolcd_power(int on)
}
EXPORT_SYMBOL(locomolcd_power);
-static int poodle_lcd_probe(struct locomo_dev *dev)
+
+static int current_intensity;
+
+static int locomolcd_set_intensity(struct backlight_device *bd)
+{
+ int intensity = bd->props->brightness;
+
+ if (bd->props->power != FB_BLANK_UNBLANK)
+ intensity = 0;
+ if (bd->props->fb_blank != FB_BLANK_UNBLANK)
+ intensity = 0;
+ if (locomolcd_flags & LOCOMOLCD_SUSPENDED)
+ intensity = 0;
+
+ switch (intensity) {
+ /* AC and non-AC are handled differently, but produce same results in sharp code? */
+ case 0: locomo_frontlight_set(locomolcd_dev, 0, 0, 161); break;
+ case 1: locomo_frontlight_set(locomolcd_dev, 117, 0, 161); break;
+ case 2: locomo_frontlight_set(locomolcd_dev, 163, 0, 148); break;
+ case 3: locomo_frontlight_set(locomolcd_dev, 194, 0, 161); break;
+ case 4: locomo_frontlight_set(locomolcd_dev, 194, 1, 161); break;
+
+ default:
+ return -ENODEV;
+ }
+ current_intensity = intensity;
+ return 0;
+}
+
+static int locomolcd_get_intensity(struct backlight_device *bd)
+{
+ return current_intensity;
+}
+
+static struct backlight_properties locomobl_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = locomolcd_get_intensity,
+ .update_status = locomolcd_set_intensity,
+ .max_brightness = 4,
+};
+
+#ifdef CONFIG_PM
+static int locomolcd_suspend(struct locomo_dev *dev, pm_message_t state)
+{
+ locomolcd_flags |= LOCOMOLCD_SUSPENDED;
+ locomolcd_set_intensity(locomolcd_bl_device);
+ return 0;
+}
+
+static int locomolcd_resume(struct locomo_dev *dev)
+{
+ locomolcd_flags &= ~LOCOMOLCD_SUSPENDED;
+ locomolcd_set_intensity(locomolcd_bl_device);
+ return 0;
+}
+#else
+#define locomolcd_suspend NULL
+#define locomolcd_resume NULL
+#endif
+
+static int locomolcd_probe(struct locomo_dev *dev)
{
unsigned long flags;
local_irq_save(flags);
locomolcd_dev = dev;
+ locomo_gpio_set_dir(dev, LOCOMO_GPIO_FL_VR, 0);
+
/* the poodle_lcd_power function is called for the first time
* from fs_initcall, which is before locomo is activated.
* We need to recall poodle_lcd_power here*/
-#ifdef CONFIG_MACH_POODLE
- locomolcd_power(1);
-#endif
+ if (machine_is_poodle())
+ locomolcd_power(1);
+
local_irq_restore(flags);
+
+ locomolcd_bl_device = backlight_device_register("locomo-bl", NULL, &locomobl_data);
+
+ if (IS_ERR (locomolcd_bl_device))
+ return PTR_ERR (locomolcd_bl_device);
+
+ /* Set up frontlight so that screen is readable */
+ locomobl_data.brightness = 2;
+ locomolcd_set_intensity(locomolcd_bl_device);
+
return 0;
}
-static int poodle_lcd_remove(struct locomo_dev *dev)
+static int locomolcd_remove(struct locomo_dev *dev)
{
unsigned long flags;
+
+ backlight_device_unregister(locomolcd_bl_device);
local_irq_save(flags);
locomolcd_dev = NULL;
local_irq_restore(flags);
@@ -136,19 +213,33 @@ static struct locomo_driver poodle_lcd_d
.name = "locomo-backlight",
},
.devid = LOCOMO_DEVID_BACKLIGHT,
- .probe = poodle_lcd_probe,
- .remove = poodle_lcd_remove,
+ .probe = locomolcd_probe,
+ .remove = locomolcd_remove,
+ .suspend = locomolcd_suspend,
+ .resume = locomolcd_resume,
};
-static int __init poodle_lcd_init(void)
+
+static int __init locomolcd_init(void)
{
int ret = locomo_driver_register(&poodle_lcd_driver);
- if (ret) return ret;
+ if (ret)
+ return ret;
#ifdef CONFIG_SA1100_COLLIE
sa1100fb_lcd_power = locomolcd_power;
#endif
return 0;
}
-device_initcall(poodle_lcd_init);
+static void __exit locomolcd_exit(void)
+{
+ locomo_driver_unregister(&poodle_lcd_driver);
+}
+
+module_init(locomolcd_init);
+module_exit(locomolcd_exit);
+
+MODULE_AUTHOR("John Lenz <lenz@xxxxxxxxxxx>, Pavel Machek <pavel@xxxxxxx>");
+MODULE_DESCRIPTION("Collie LCD driver");
+MODULE_LICENSE("GPL");
diff -puN drivers/video/backlight/Makefile~backlight-locomo-backlight-driver-updates drivers/video/backlight/Makefile
--- devel/drivers/video/backlight/Makefile~backlight-locomo-backlight-driver-updates 2006-04-22 01:10:58.000000000 -0700
+++ devel-akpm/drivers/video/backlight/Makefile 2006-04-22 01:10:58.000000000 -0700
@@ -4,4 +4,4 @@ obj-$(CONFIG_LCD_CLASS_DEVICE) += lc
obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o
obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o
-obj-$(CONFIG_SHARP_LOCOMO) += locomolcd.o
+obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o
diff -puN include/asm-arm/hardware/locomo.h~backlight-locomo-backlight-driver-updates include/asm-arm/hardware/locomo.h
--- devel/include/asm-arm/hardware/locomo.h~backlight-locomo-backlight-driver-updates 2006-04-22 01:10:58.000000000 -0700
+++ devel-akpm/include/asm-arm/hardware/locomo.h 2006-04-22 01:10:58.000000000 -0700
@@ -111,6 +111,8 @@
#define LOCOMO_ALS 0x00 /* Adjust light cycle */
#define LOCOMO_ALD 0x04 /* Adjust light duty */
+#define LOCOMO_ALC_EN 0x8000
+
/* Backlight controller: TFT signal */
#define LOCOMO_BACKLIGHT 0x38
#define LOCOMO_TC 0x00 /* TFT control signal */
@@ -203,4 +205,7 @@ void locomo_gpio_write(struct locomo_dev
/* M62332 control function */
void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel);
+/* Frontlight control */
+void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf);
+
#endif
_
Patches currently in -mm which might be from rpurdie@xxxxxxxxx are
git-mtd.patch
zlib_inflate-upgrade-library-code-to-a-recent-version.patch
zlib_inflate-upgrade-library-code-to-a-recent-version-fix.patch
backlight-locomo-backlight-driver-updates.patch
-
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