Normally, PWM channels have fixed output until software requests to
change their settings. There are some PWM devices whose outputs can be
changed autonomously according to a predefined pattern programmed in
hardware.
Add support for such devices by adding a new pwm_output_type enum type
to identify these two different PWM types and adding helper functions to
read the PWM output type supported by a PWM.
Bug: 140290585
Link: https://lore.kernel.org/lkml/1568415464-20267-1-git-send-email-gurus@codeaurora.org/
Change-Id: Ie8d61975057c51258e5bde9451ce96be4acdf98b
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
[gurus@codeaurora.org: removed output_pattern, changed output_type sysfs
param to read-only, reworded commit message]
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
106a4b85e0