+Cc Juergen

On 14/11/2017 at 08:12:03 -0200, Fabio Estevam wrote:

Hi Patrick,

On Tue, Nov 14, 2017 at 3:00 AM, Patrick Br?nn [off-list ref] wrote:

quoted

quoted

From: Fabio Estevam [mailto:festevam at gmail.com]
Sent: Montag, 13. November 2017 19:57

quoted

I don't recall of any recent change in this area.

I don't think the behavior changed recently. I tried a kernel 4.4.65 and it shows the same symptoms. I guess Noel really means 3.19-> 4.0.

Or maybe by 'old kernel' he meant the vendor 2.6.35 kernel.

I have the impression that the dryice driver has never worked in
mainlune for mx53.

I doubt that because it seems to have been used by Pengutronix.

quoted

Unfortunately no. Did you run hwclock or rtctest?

Yes, this is what I get:

# hwclock -r -D
hwclock from util-linux 2.31
System Time: 14.876372
Trying to open: /dev/rtc0
Using the rtc interface to the clock.
Last drift adjustment done at 2167 seconds after 1969
Last calibrat[   14.892484] imxdi_rtc 53fa4000.srtc: Write-wait timeout val = 08
ion done at 2167 seconds after 1969
Hardware clock is on UTC time
Assuming hardware clock is kept in UTC time.
Waiting for clock tick...
hwclock: select() to /dev/rtc0 to wait for clock tick timed out
...synchronization failed

quoted

I still see:
root at CX9020:~# cat /proc/interrupts | grep rtc
 40:          0      tzic  24 Edge      53fa4000.srtc
 41:          0      tzic  25 Edge      53fa4000.srtc
root at CX9020:~# hwclock -D -r
hwclock from util-linux 2.29.2
Using the /dev interface to the clock.
Last drift adjustment done at 1490885082 seconds after 1969
Last calibration done at 1490885082 seconds after 1969
Hardware clock is on UTC time
Assuming hardware clock is kept in UTC time.
Waiting for clock tick...
[   41.035269] irq 40: nobody cared (try booting with the "irqpoll" option)
[   41.042514] handlers:
[   41.044847] [<c06031e0>] dryice_irq
[   41.048398] Disabling IRQ #40

This error I don't get with the 2.31 hwclock version I tried.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com