diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-31 13:20:16 (GMT) |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-31 13:20:16 (GMT) |
commit | 7b70c4275f28702b76b273c8534c38f8313812e9 (patch) | |
tree | 1df2229ca02466bd1adda814ac5c37aa0a597db1 /drivers/video | |
parent | ceb0885d3b01bb2e2f18765770e212914f2864be (diff) | |
parent | a20df564d15bd28e3df24e1c65b885bd74d23f17 (diff) | |
download | linux-7b70c4275f28702b76b273c8534c38f8313812e9.tar.xz |
Merge branch 'devel-stable' into devel
Conflicts:
arch/arm/kernel/entry-armv.S
arch/arm/kernel/setup.c
arch/arm/mm/init.c
Diffstat (limited to 'drivers/video')
-rw-r--r-- | drivers/video/imxfb.c | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c index b4b6dece..43f0639 100644 --- a/drivers/video/imxfb.c +++ b/drivers/video/imxfb.c @@ -175,6 +175,7 @@ struct imxfb_info { struct imx_fb_videomode *mode; int num_modes; + struct backlight_device *bl; void (*lcd_power)(int); void (*backlight_power)(int); @@ -449,6 +450,73 @@ static int imxfb_set_par(struct fb_info *info) return 0; } + + +static int imxfb_bl_get_brightness(struct backlight_device *bl) +{ + struct imxfb_info *fbi = bl_get_data(bl); + + return readl(fbi->regs + LCDC_PWMR) & 0xFF; +} + +static int imxfb_bl_update_status(struct backlight_device *bl) +{ + struct imxfb_info *fbi = bl_get_data(bl); + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + fbi->pwmr = (fbi->pwmr & ~0xFF) | brightness; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + clk_enable(fbi->clk); + writel(fbi->pwmr, fbi->regs + LCDC_PWMR); + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + clk_disable(fbi->clk); + + return 0; +} + +static const struct backlight_ops imxfb_lcdc_bl_ops = { + .update_status = imxfb_bl_update_status, + .get_brightness = imxfb_bl_get_brightness, +}; + +static void imxfb_init_backlight(struct imxfb_info *fbi) +{ + struct backlight_properties props; + struct backlight_device *bl; + + if (fbi->bl) + return; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = 0xff; + writel(fbi->pwmr, fbi->regs + LCDC_PWMR); + + bl = backlight_device_register("imxfb-bl", &fbi->pdev->dev, fbi, + &imxfb_lcdc_bl_ops, &props); + if (IS_ERR(bl)) { + dev_err(&fbi->pdev->dev, "error %ld on backlight register\n", + PTR_ERR(bl)); + return; + } + + fbi->bl = bl; + bl->props.power = FB_BLANK_UNBLANK; + bl->props.fb_blank = FB_BLANK_UNBLANK; + bl->props.brightness = imxfb_bl_get_brightness(bl); +} + +static void imxfb_exit_backlight(struct imxfb_info *fbi) +{ + if (fbi->bl) + backlight_device_unregister(fbi->bl); +} + static void imxfb_enable_controller(struct imxfb_info *fbi) { pr_debug("Enabling LCD controller\n"); @@ -579,7 +647,6 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf fbi->regs + LCDC_SIZE); writel(fbi->pcr, fbi->regs + LCDC_PCR); - writel(fbi->pwmr, fbi->regs + LCDC_PWMR); writel(fbi->lscr1, fbi->regs + LCDC_LSCR1); writel(fbi->dmacr, fbi->regs + LCDC_DMACR); @@ -779,6 +846,8 @@ static int __init imxfb_probe(struct platform_device *pdev) } imxfb_enable_controller(fbi); + fbi->pdev = pdev; + imxfb_init_backlight(fbi); return 0; @@ -816,6 +885,7 @@ static int __devexit imxfb_remove(struct platform_device *pdev) imxfb_disable_controller(fbi); + imxfb_exit_backlight(fbi); unregister_framebuffer(info); pdata = pdev->dev.platform_data; |