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authorRichard Purdie <rpurdie@rpsys.net>2006-06-26 00:26:27 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:28 -0700
commite4423781850025726b6c4e24ba3d93c7ff9cd826 (patch)
treea154cdf7a39e0554177cd096758f28efcc24c1e1 /arch
parentf8020dc560fde089becc05de1d0ada1f7f46dc51 (diff)
[PATCH] backlight: LOCOMO Backlight Driver updates
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@rpsys.net> Signed-off-by: Antonino Daplas <adaplas@pol.net> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/common/locomo.c45
1 files changed, 25 insertions, 20 deletions
diff --git a/arch/arm/common/locomo.c b/arch/arm/common/locomo.c
index a7dc1370695..0dafba3a701 100644
--- a/arch/arm/common/locomo.c
+++ b/arch/arm/common/locomo.c
@@ -629,21 +629,6 @@ static int locomo_resume(struct platform_device *dev)
#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 resource *mem, int irq)
, 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 locomo_dev *ldev, unsigned int dac_data, int
}
/*
+ * 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