Hello.
On 06/14/2016 03:43 AM, Simon Horman wrote:
[...]
And that the system behaves sanely on suspend/resume.
I'd be thankful if you told me how to test that. :-)
System suspend:
echo mem > /sys/power/state
Oh. I know that one! :-)
System resume: You're gonna need a "wakeup-source" in your DTS, e.g. gpio-keys.
Serial should work too, echo "enabled" to the corresponding wakeup
file in /sys first.
I'm afraid I couldn't find that file. All I saw were RPM controls...
In case of issues, try "echo 0 > /sys/module/printk/parameters/console_suspend".
There's no problems suspending, it's the resuming that's a problem for me.
Good luck!
As usual, there was no luck. :-)
WBR, Sergei
Does resume work for UP (i.e. without SMP)?
No. My problem with resume is I can't wake up the remote system. I don't
see the needed 'wakeup' file in
/sys/devices/platform/soc/e6e60000.serial/...
However, if I enable CONFIG_PM_[ADVANCED_]DEBUG and do
$ echo -n core /sys/.power/pm_test
the system happily wakes up after a small delay (5 s), w/either SMP or UP kernel.
That seems promising but it seems curious that there is no wakeup file.
On Lager the following procedure works for me using
renesas-devel-20160613-v4.7-rc3 and shmobile defconfig.
0. Add wakeup-source property to serial@e6ce0000 node in DT
Ah, stupid me, it was the piece that I'd overlooked!
1. echo enabled > /sys/devices/platform/e6e60000.serial/tty/ttySC0/power/wakeup
2. echo mem > /sys/power/state
3. Provide input on serial console
* Success! *
Yeah, works now!
Sorry, I had no previous experience with the PM. Was unsupported feature
back in MontaVista... :-)
How did testing CPU hotplug go? Did it work for all CPUs?
Sure!
Great!
The only problem I'm seeing (again) is the RCAN clock failing to register:
rcar_gen2_cpg_clocks_init: failed to register cpg_clocks rcan clock (-12)
I was going to look at it yesterday but (wrongly) thought it somehow
cured itself... I'll look at it now.
Is this resolved? If not perhaps you could consider removing the node
in question for now.
That's what I did in v5, i.e. removed the RCAN CPG clock (not the whole
node)...
MBR, Sergei
