Backlight control (Sharks Cove schematics)

Nicolas Huillard nicolas at huillard.net
Thu Jun 30 17:48:30 CEST 2016


Hi all,

Reading the Sharks Cove schematics PDF (the TCM really seems to be the
same hardware), I see that the backlight is connected to the SIO_PWM(0)
output of the SoC (maybe some sort of SIO device driver need to be
enabled, just like GPIO).
The DSDT (found on
http://www.zaurus.org.uk/download/toshiba_click_mini_l9w/ thanks Paul)
mentions two PWM devices as "Device (PWM1)" and "Device (PWM2)" with
HID/CID "80860F09" and various methods (Power State 0 and 3, Current
Resource Settings, etc.).
I guess controlling the backlight is a matter of actually using those
devices (or one of those, preferably the first one).

-- 
NH



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