tree f2c2fca15cf833df586c599d4f63fa0471c8602f
parent 4e84511e4b8b92cc09ffd55e9d0160268a990e41
author Xu Kai <kaixu@codeaurora.org> 1393564269 +0800
committer Xu Kai <kaixu@codeaurora.org> 1394439152 +0800

leds: leds-qpnp: PWM period granularity auto selection for leds

Some leds use PWM wave to control the brightness. The original
period granularity is using microsecond by default, it's a very
large granularity and will cause some user experience issues on
leds' brightness.

Auto select the PWM period granularity between microsecond and
nanosecond according to the range that hardware can support.

CRs-Fixed: 622683
Change-Id: I0669a0c88ca2ba491f0a53be6070476d61374d72
Signed-off-by: Xu Kai <kaixu@codeaurora.org>