On Sat, 26 Sep 2020 at 14:09, Alper Nebi Yasak <alpernebiya...@gmail.com> wrote: > > The PWM device provided by Chrome OS EC doesn't really support anything > other than setting a relative duty cycle. To support it as a backlight, > this patch makes the PWM period optional in the device tree and pretends > the valid brightness range is its period_ns. > > Also adds a sandbox test for a PWM channel that has a fixed period, > checking that the resulting duty_cycle matches on a set_config() even if > the requested period_ns can't be set. > > Signed-off-by: Alper Nebi Yasak <alpernebiya...@gmail.com> > --- > > Changes in v2: > - Add sandbox test to pwm.c (using sandbox_pwm's channel 2) > - Add comments to pwm_set_config() and pwm_ops->set_config() > > v1: > https://patchwork.ozlabs.org/project/uboot/patch/20200923165231.18188-1-alpernebiya...@gmail.com/ > > drivers/pwm/sandbox_pwm.c | 11 +++++++++-- > drivers/video/pwm_backlight.c | 20 ++++++++++++++------ > include/pwm.h | 8 ++++++++ > test/dm/pwm.c | 11 +++++++++++ > 4 files changed, 42 insertions(+), 8 deletions(-) >
Reviewed-by: Simon Glass <s...@chromium.org>
