Thread (53 messages) 53 messages, 9 authors, 2016-08-25

Re: [PATCH 1/3] ARM: dts: omap5-board-common: enable rtc and charging of backup battery

From: Tony Lindgren <hidden>
Date: 2016-01-06 17:09:33
Also in: linux-omap, lkml

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

Regards,

Tony
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