Re: [PATCH v8 00/26] Ingenic TCU patchset v8

[Paul Cercueil]

Hi Mathieu,

Le jeu. 24 janv. 2019 à 18:26, Mathieu Malaterre <malat@xxxxxxxxxx> a 
écrit :
> Paul,
>
> On Wed, Dec 12, 2018 at 11:09 PM Paul Cercueil <paul@xxxxxxxxxxxxxxx> 
> wrote:
> >  Hi,
> >
> >  Here's the version 8 and hopefully final version of my patchset, 
> > which
> >  adds support for the Timer/Counter Unit found in JZ47xx SoCs from
> >  Ingenic.
>
> I can no longer boot my MIPS Creator CI20 with this series (merged
> opendingux/for-upstream-timer-v8).
>
> Using screen+ttyUSB, I can see messages stopping at:
>
> ...
> [  OK  ] Started Cgroup management daemon.
>          Starting Regular background program processing daemon...
> [  OK  ] Started Regular background program processing daemon.
>          Starting System Logging Service...
>          Starting Provide limited super user privileges to specific 
> users...
>          Starting Restore /etc/resolv.conf if the system cras...s 
> shut down....
>          Starting WPA supplicant...
>          Starting D-Bus System Message Bus...
> [  OK  ] Started D-Bus System Message Bus.
>
> Nothing really stands out in the error messages. Could you suggest
> things to try out to get into a bootable state ?

I'm debugging it right now on jz4740, it seems to happen when the 
clocksource
from the ingenic-timer driver is used. Is it your case? It should not 
happen
if you have CONFIG_INGENIC_OST set.

> >  The big change is that the timer driver has been simplified. The 
> > code to
> >  dynamically update the system timer or clocksource to a new channel 
> > has
> >  been removed. Now, the system timer and clocksource are provided as
> >  children nodes in the devicetree, and the TCU channel to use for 
> > these
> >  is deduced from their respective memory resource. The PWM driver 
> > will
> >  also deduce from its memory resources whether a given PWM channel 
> > can be
> >  used, or is reserved for the system timers.
> >
> >  Kind regards,
> >  - Paul Cercueil