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Add a "brightness_enable" module parameter that allows the local admin to force the backlight support to not be enabled. It can also be used to force the backlight support to be enabled, but that is currently a no-op as the backlight support is enabled by default when available. This will be changed by a different patch. Signed-off-by: NHenrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: NLen Brown <len.brown@intel.com>
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