[Letux-kernel] mixed power management observations

H. Nikolaus Schaller hns at goldelico.com
Thu Apr 13 17:56:19 CEST 2017


> Am 12.04.2017 um 07:28 schrieb Andreas Kemnade <andreas at kemnade.info>:
> 
> On Tue, 11 Apr 2017 22:25:27 +0200
> Andreas Kemnade <andreas at kemnade.info> wrote:
> 
>> Here are some observations I did with the 4.10 kernel.
>> 
>> Suspend with usb connected in 4.10:
>> - suspend immediately fails
>> - bci gets a battery removal interrupt
>> after failed suspend:
>> devicemode.sh reenables usb access
> hmm, devicemode.sh is not in the Letux directory...

I never missed it :)

> devicemode.sh =
> echo peripheral > /sys/bus/platform/devices/musb-hdrc*/mode

should I add?

> 
>> setting USBFASTMCHG enables charging again (or replugging)
>> 
>> after some random actions, suspend with usb connected might work but with a quite high suspend current

Looks as if something mixes up the twl4030 charger state.
Interference between automatic modes of the twl and software?

BR,
Nikolaus


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