Tony,
it is strange. It now works under unknown conditions - without any obvoius change.

Am 06.01.2016 um 18:09 schrieb Tony Lindgren [off-list ref]:

* H. Nikolaus Schaller [off-list ref] [160106 08:48]:

quoted

Hi Tony,

Am 06.01.2016 um 17:41 schrieb Tony Lindgren [off-list ref]:

quoted

Hi,

* H. Nikolaus Schaller [off-list ref] [160106 00:12]:

quoted

Am 06.01.2016 um 02:00 schrieb Tony Lindgren [off-list ref]:

quoted

Also I'm not seeing just zeroes coming from RTC after typing hwclock
on omap5-uevm. It's working on x15 though.

Nikolaus, is hwclock command working for you on omap5-uevm?

Well, yes and no. It appears it *was* working when tested last time
(we sometimes have months of delay for submitting patches upstream).

I have found an SD image with 4.3-rc6 with this patch in the dtb and
there it works. With 4.4-rc8 it does not work. hwclock command hangs for
10 seconds (I guess some timeout).

I have checked the dtb and in both cases it is interrupts = <8 0>;

xxd /sys/firmware/devicetree/base/ocp/i2c@48070000/palmas@48/rtc/interrupts
0000000: 0000 0008 0000 0000

So I think something has changed in the rtc driver or somewhere else.

I just gave it a try on v4.3-rc6 with omap5-uevm.dts patched for
RTC, and I still don't have hwclock working with RTC.

It seems you have some additional patches there that make it work?

Hm. Not that I am aware of. We just did add the rtc nodes but did not
touch palmas drivers (except adding the gpadc of this patch series).

OK

quoted

quoted

I guess it could also be a bootloader change if it's a different
SD image that works for you.

Yes, it is using a 2 years old U-Boot instead 2015.10 compiled from
source. I will try to find out if it makes a difference.

OK. It could be also some .config change with something built-in?

I have compared /proc/config.gz from both systems and /sys/firmware/fdt
with no significant and obvious change.

Then I booted the 4.4-rc8 again and this time it worked.

To verify, I have checked out linux-next this morning, cherry-picked this palmas
rtc patch, compiled with omap2plus defconfig, and used the omap5-uevm.dtb. And
hwclock works after doing a modprobe rtc_palmas.

Then I did the same with official v4.4-rc8 and hwclock hangs. And now our
4.4-rc8 production kernel hangs again as well. Even if I use the
DTB from the 4.3 kernel.

So I think it is something which is unstable in 4.4-rc8 that is (probably) fixed in
linux-next and unrelated to this DT patch.

But I have no hint or idea what it is.

BR,
Nikolaus