regulator: rpi-panel: Remove get_brightness hook
The driver was implementing a get_brightness function that tried to read back the PWM setting of the display to report as the current brightness. The controller on the display does not support that, therefore we end up reporting a brightness of 0, and that confuses systemd's backlight service. Remove the hook so that the framework returns the current brightness automatically. Signed-off-by:Dave Stevenson <dave.stevenson@raspberrypi.com> Signed-off-by:
Detlev Casanova <detlev.casanova@collabora.com> Link: https://lore.kernel.org/r/20220124220129.158891-8-detlev.casanova@collabora.com Signed-off-by:
Mark Brown <broonie@kernel.org>
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