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drivers/video/backlight/aat2870_bl.c: fix setting max_current

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- Current implementation tests wrong value for setting
   aat2870_bl->max_current.

 - In the current implementation, we cannot differentiate between 2 cases:

   a) if pdata->max_current is not set , or

   b) pdata->max_current is set to AAT2870_CURRENT_0_45 (which is also 0).

   Fix it by setting AAT2870_CURRENT_0_45 to be 1 and adjust the equation in
   aat2870_brightness() accordingly.

Signed-off-by: Axel Lin <[email protected]>
Cc: Richard Purdie <[email protected]>
Cc: Samuel Ortiz <[email protected]>
Tested-by: Jin Park <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Axel Lin 2011-08-03 16:21:17 -07:00 • committed by Linus Torvalds
commit 5d6f921b42
2 changed files with 3 additions and 3 deletions
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4
drivers/video/backlight/aat2870_bl.c
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@ -44,7 +44,7 @@ static inline int aat2870_brightness(struct aat2870_bl_driver_data *aat2870_bl,
struct backlight_device *bd = aat2870_bl->bd;
int val;
val = brightness * aat2870_bl->max_current;
val = brightness * (aat2870_bl->max_current - 1);
val /= bd->props.max_brightness;
return val;
@ -175,7 +175,7 @@ static int aat2870_bl_probe(struct platform_device *pdev)
else
aat2870_bl->channels = AAT2870_BL_CH_ALL;
if (pdata->max_brightness > 0)
if (pdata->max_current > 0)
aat2870_bl->max_current = pdata->max_current;
else
aat2870_bl->max_current = AAT2870_CURRENT_27_9;