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[PATCH] backlight: LOCOMO Backlight Driver updates

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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>
This commit is contained in:
Richard Purdie
2006-06-26 00:26:27 -07:00
committed by Linus Torvalds
parent f8020dc560
commit e442378185
5 changed files with 146 additions and 37 deletions
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45
arch/arm/common/locomo.c
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@@ -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 */
@@ -1062,6 +1043,30 @@ void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int
spin_unlock_irqrestore(&lchip->lock, flags);
}
/*
* 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."
*