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b817a59c2a
When the backlight is managed by the panel controller IC, an external power rail might be powering the backlight. Add an optional `bl-supply` property to describe such power rail, thus allow disabling the backlight. Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn> Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patch.msgid.link/20260608162622.403713-1-zhengxingda@iscas.ac.cn