Add support for the WMI methods used to turn off and adjust the brightness of the secondary "screenpad" device found on some high-end ASUS laptops like the GX650P series and others. Changelog: - V6 - Move bulk of cover letter in to commit message - Add define for ASUS_SCREENPAD_BRIGHT_DEFAULT to be used on boot - Remove the use of max() in update_screenpad_bl_status() - Previous: https://lore.kernel.org/all/20230827232358.80512-1-luke@xxxxxxxxxx/ - V5 - Add minimum brightness to prevent screen from becoming invisible - Previous: https://lore.kernel.org/all/20230630041743.911303-1-luke@xxxxxxxxxx/ - V4 - Fix a null dereference that happened if the display was powered off and dev struct uninitialised yet - Previous: https://lore.kernel.org/all/20230620030033.55033-1-luke@xxxxxxxxxx/ - V3 - Refactor error handling in all functions - V2 - Complete refactor to use as a backlight device Luke D. Jones (1): platform/x86: asus-wmi: add support for ASUS screenpad drivers/platform/x86/asus-wmi.c | 133 +++++++++++++++++++++ drivers/platform/x86/asus-wmi.h | 1 + include/linux/platform_data/x86/asus-wmi.h | 4 + 3 files changed, 138 insertions(+) -- 2.41.0
