[Letux-kernel] suspend current

H. Nikolaus Schaller hns at goldelico.com
Mon Aug 22 23:48:21 CEST 2016


> Am 22.08.2016 um 22:39 schrieb Andreas Kemnade <andreas at kemnade.info>:
> Hi,
> On Mon, 22 Aug 2016 09:24:57 +0200
> "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
>>> Am 22.08.2016 um 08:05 schrieb Andreas Kemnade
>>> <andreas at kemnade.info>:
>>> Hi,
>>> I am wondering what is up with suspend current and phy-twl4030
>>> power management.
>> Yes something is broken. That is what the themographic camera seems
>> to indicate that the phy-twl4030 is staying powered up. But I have not
>> checked with our latest charger fixes. The same bugs which prevented
>> charger working might also make phy-twl4030 stay active.
> I have fixed some pm issues in phy-twl4030-usb which might improve the
> situation.

I am already curious!

>>> Due to hardware problems I cannot easily measure that at the moment.
>>> What would be interesting: suspend current with only omap2430 module
>>> blacklisted and suspend suspend current with omap2430 and
>>> phy-twl4030-usb module not loaded.
>>> So I someone finds time to test that, it would be helpful.
>> I think I can do that next week.
>>> Thanks in advance.
>>> You can find a letux-4.8-rc2 here (and totally untested rc3):
>>> https://github.com/akemnade/linux.git
>> Any important changes (improvements)?
> Well, when compiling the rc2  make asked me about a new userspace
> copy hardening option.


> I enabled that and then I tested a patch series
> Tony put me on cc: for. tar caused a kernel oops during copying the new
> modules... So should that be a protection against broken kernels? ;-)
> I mainly created the newer -rcs for testing patches against something
> recent. I have not noticed any improvements from upstream.

Yes, it is rarely something noticeable.

BTW: it looks as if our bq27000 patches have arrived in linux-next.

> There is a new patch from me:
> phy-twl4030-usb: better handle musb_mailbox() failure
> which might improve the suspend situation.
> I trust now the phy-twl4030-usb driver again. So it is
> time to go back to musb and fix bugs there (and hopefully
> not unveil other phy-twl4030-usb bugs by that).

Good luck (it is an area where I can't help much)!

Thanks and BR,

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