Olinuxino Maxi unable to resume from suspend

[swahren]

Hi,

i'm using i.MX233 OlinuXino MAXI Rev B with a SD card based on this instructions:

https://www.olimex.com/Products/OLinuXino/iMX233/_resources/OPEN-EMBEDDED-README.TXT

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Linux version 2.6.35.3_OLinuXinoR4 (hehopmajieh@hehopmajieh-office) (gcc version 4.7.1 20120421 (prerelease) (GCC) ) #11 PREEMPT Mon May 21 10:27:52 EEST 2012


After triggering suspend i'm unable to resume the board via recovery pads

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root@olinuxino:/sys/kernel# pswitch goto suspend
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.01 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
Suspending console(s) (use no_console_suspend to debug)


I've have found this old thread but there wasn't any solution:

https://www.olimex.com/forum/index.php?topic=1200.0
Can anyone reproduce this issue or know a solution?

[Kean]

I can confirm that I have reproduced this in the past.
Never really solved it under Linux, but I think some work was done in this area in newer kernels.
All my Olinuxino boards are packed away, and I don't have suspend/resume buttons on my custom board.

[swahren]

Hi Kean,

thanks for cofirming. Unfortunately the Mainline Kernel doesn't provide real suspend support for i.MX23 (only WFI). I tried to port the code, but i stuck at switching CPU PLL to XTAL:

https://community.nxp.com/message/643589

Doing the same on a i.MX28 board everything is fine. I'm not sure if this is CPU, package or board related issue.

So i tried the vendor kernel 2.6.35 which shows the same behavior. But i never tried to setup this old kernel sources with bootlets to verify in the depth.

Btw you don't need the buttons to test suspend/resume. Simply call:

echo mem > /sys/power/state

But you will need no_console_suspend=1 in kernel cmdline in order to wake up from console.

Just one question: do you know the revisions of your olimex boards?

[Kean]

As I mentioned, my Olinuxinos are all packed away somewhere, but I think they're about 2012 vintage if that helps.  Rev B comes to mind, but not sure if that was for the micro or maxi boards.

[swahren]

FWIW i want to mention that the original issue will be fixed in 4.10:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=88e20c74ee020f9e0c99dfce0dd9aa61c3f0cca0

[lambda]

Awesome! Thanks for all the work you are putting into mxs!

[Kean]

Thanks Stefan!
I've just got back into testing recent kernels on my custom imx233 board.
http://kean.com.au/oshw/Holiday/