From e4423781850025726b6c4e24ba3d93c7ff9cd826 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Mon, 26 Jun 2006 00:26:27 -0700 Subject: [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 Signed-off-by: Antonino Daplas Cc: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arm/common/locomo.c | 45 +++++++++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 20 deletions(-) (limited to 'arch/arm/common') 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 */ @@ -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." * -- cgit v1.2.3