Benjamin Herrenschmidt 0094f2cdcf
[POWERPC] Fix for via-pmu based backlight control ...
This fixes a few issues with via-pmu based backlight control.
First, it fixes a sign problem with the setup of the backlight
curve since the `range' value there -can- (and will) go negative.
Then, it reworks the interaction between this and the via-pmu sleep
code to properly restore backlight on wakeup from sleep.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Signed-off-by: Paul Mackerras <paulus@samba.org >
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