Subject: [linux-sunxi] Re: [PATCH 0/5] ARM: dts: sunxi: Add backlight node to q8 tablets

From: [email-masked] (8001010)
Date: Mon, 11 Jan 2016 11:34:18 +0100

Hans de Goede wrote:
> Hi,
>
> On 21-12-15 11:56, Silvio Pellicano wrote:
>>
>>
>>> Here is a slightly updated version of Chen-Yu's backlight
>>> patches, also adding support for the backlight found on A13
>>> based q8 tablets.
>>>
>>
>> If i compile your dtsi with (obviously) pwm  support enable , backlight
>> switch off after kernel start,
>> if i disable pwm in menuconfig,it stay on, all seem correct (pwm on PB2 in
>> original script.bin),
>> but there is somewhere a bug in pwm or dtsi description of backlight.
>
> No there is not, if you enable the pwm driver you must also enable
> the backlight-pwm driver / add CONFIG_BACKLIGHT_PWM=y to your .config
> (and make sure it stays that way after a "make oldconfig").
>
> Regards,
>
> Hans
>
Now work, but what flag  i have to enable to leave 5v usb otg ON?
uboot switch ON Usb Otg voltage but kernel switch off during boot (no usb devices work).

Thanks