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authorMax Krummenacher <max.krummenacher@toradex.com>2022-05-13 12:26:14 +0200
committerShawn Guo <shawnguo@kernel.org>2022-06-11 16:50:40 +0800
commit14092ffbd7fd1d3aa4ea8006c747f225e9147dd6 (patch)
tree78cb7f5a30f068319cd090c40ae69eb111f235ad /tools/perf/scripts/python/export-to-postgresql.py
parentc77c5b25c1353d5db4a7d2213fe12e54ab3a05dd (diff)
ARM: dts: imx6qdl-colibri: backlight pwm: Simplify inverted backlight
Set #pwm-cells to the default 3 to gain access to the parameter which allows inverting the PWM signal. This is useful to specify a backlight which has its highest brightness at 0. With the change to use the PWM with inverted polarity the PWM signal is inverted to how it was before this patch. This changes the meaning of the values in the brightness-levels property. I.e. the duty-cycle changes from x/255 to (255-x)/255. Keeping the brightness-levels will then have a big brightness jump from 0 to 127 duty cycle, the other 6 steps will then be barely noticeable. Change the brightness-levels to provide the same brightness-levels as before. Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Reviewed-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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