Alper Nebi Yasak
authored
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 <alpernebiyasak@gmail.com> Reviewed-by:
Simon Glass <sjg@chromium.org>
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