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| author | Axel Lin <axel.lin@gmail.com> | 2011-08-03 16:21:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-08-03 14:25:22 -1000 |
| commit | 5d6f921b42749d1a70441685b7a4f2801e12ebfb (patch) | |
| tree | 6c2bdf6a7de23e7ec7d8d5990586e1a0527164b0 /drivers/video/backlight | |
| parent | 4c4dd903e72507c853b8c2b04b22e0d0c721fd93 (diff) | |
| download | linux-5d6f921b42749d1a70441685b7a4f2801e12ebfb.tar.gz linux-5d6f921b42749d1a70441685b7a4f2801e12ebfb.tar.bz2 linux-5d6f921b42749d1a70441685b7a4f2801e12ebfb.zip | |
drivers/video/backlight/aat2870_bl.c: fix setting max_current
- 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 <axel.lin@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Tested-by: Jin Park <jinyoungp@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/backlight')
| -rw-r--r-- | drivers/video/backlight/aat2870_bl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c index f13a3f7e2e8f..331f1ef1dad5 100644 --- a/drivers/video/backlight/aat2870_bl.c +++ b/drivers/video/backlight/aat2870_bl.c @@ -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; |