> Am 09.09.2020 um 16:48 schrieb Robert Nelson <robertcnel...@gmail.com>:
>
> On Wed, Sep 9, 2020 at 9:43 AM H. Nikolaus Schaller <h...@computer.org> wrote:
>>
>> Hi,
>> I have a custom board based on osd3358 and a little trouble getting the
>> "poweroff" command work as expected.
>>
>> The device tree is almost the same as am335x-pocketbeagle.dts and I am
>> running a v5.9-rc4 kernel.
>> Therefore,
>>
>> &rtc {
>> system-power-controller;
>> };
>>
>> is defined.
>>
>> The board is powered through USB (haven't tried other options).
>>
>> "poweroff" results in:
>>
>> ...
>> [info] Hardware Clock updated to Wed Sep 9 14:31:56 UTC 2020.
>> [ ok ] Deactivating swap...done.
>> [ 200.324307] EXT4-fs (mmcblk1p2): re-mounted. Opts: (null)
>> [info] Will now halt.
>> [ 202.548073] reboot: Power down
>>
>> After that, the gpio-led showing cpu activity trigger goes off for a moment
>> but after that it is flickering as if there is still CPU activity with some
>> 1 second modulation.
>>
>> Pressing the reset button immediately reboots.
>>
>> So this means that "poweroff" does not shut down the PMIC and the processor
>> is still idling.
>>
>> Pressing the power button for 10 seconds does a forced shutdown and the
>> reset button is without significance.
>>
>> And hints how to make "poweroff" work are welcome.
>
> This two parts to make it work with the PocketBeagle, first is the
> patch you have and then also configure the RTC in u-boot to use an
> internal 32Khz reference:
>
> U-boot doesn't make this too easy, so some things need to be moved around..
>
> https://github.com/RobertCNelson/Bootloader-Builder/blob/master/patches/v2019.04/0001-am335x_evm-uEnv.txt-bootz-n-fixes.patch#L185-L207
Ah, ok. I'll look into that.
But does it mean it is not a kernel problem? Is there no kernel-only solution
(without touching u-boot)?
I do not need the RTC or RTC wakeup, just safe power-down by user-command...
BR and thanks,
Nikolaus
>
> Regards,
>
> --
> Robert Nelson
> https://rcn-ee.com/
>
> --
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