leds: qpnp-haptics: Add haptics driver

Existing haptics driver is coupled with timed_output class driver
which was existing under staging/android. Since the vibrator HAL
in AOSP had been modified to support vibrator device under LED
class and also the timed_output class driver had been dropped in
newer kernel versions, create a new haptics driver that registers
with LED class framework.

As before, haptics module supports multiple play modes, direct,
buffer, audio and PWM. It supports different actuators, ERM and
LRA.

Driver supports to play multiple set of wave samples (upto 32)
in buffer mode which can be configured by the user instead of
just based on the duration.

For example, to enable haptics for 30 ms,

echo 30 > /sys/class/leds/vibrator/duration
echo 1 > /sys/class/leds/vibrator/activate

Change-Id: I250089212c5da403531ae012c6e48e58bb1d18b3
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
Signed-off-by: Shilpa Suresh <sbsure@codeaurora.org>

0 files changed, 0 insertions, 0 deletions