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

From: Paul Cercueil
Date: Thu Jan 24 2019 - 16:42:04 EST

Hi Mathieu,

Le jeu. 24 janv. 2019 à 18:26, Mathieu Malaterre <malat@xxxxxxxxxx> a écrit :

On Wed, Dec 12, 2018 at 11:09 PM Paul Cercueil <paul@xxxxxxxxxxxxxxx> wrote:


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

I can no longer boot my MIPS Creator CI20 with this series (merged

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