10:51 <tolszak> narmstrong: Hello, Any idea how odroid n2 handles gpio interrupts after power off? It works alright with hardkernel kernel and gpiopower=gpio_pin_id. With amlogic meson I was only able to power off using gpio

10:51 <tolszak> with small change to dts

10:52 <narmstrong> tolszak: you mean to power on after power off ? Or to go into power off ?

10:53 <tolszak> I'm able to poweroff (with this patch https://github.com/agners/operating-system/commit/5073d6ac50aeffedf4cece534e6b1e05320e6937) but can't wake it up

10:53 <tolszak> Downloding hardkernel kernel sources to look what they do

10:53 <tolszak> But perhaps it is something with 5.X kernel...

10:54 <tolszak> narmstrong: I can't power on after power off

10:54 <narmstrong> Handling is done in https://github.com/BayLibre/u-boot/blob/buildroot-openlinux-4.9-g12a-201904/board/amlogic/g12b_w400_v1/firmware/scp_task/pwr_ctrl.c

10:54 <narmstrong> Perhaps hardkernel has changed how they interact with this piec of code

10:55 <narmstrong> On amlogic réf board all of this is hardcoded

10:55 <tolszak> Hmm Is it safe to just try to apply this patch to 5.14?

10:58 <tolszak> narmstrong: On rpi 4it is part of their firmware. I mean the configuration

11:11 <tolszak> narmstrong: Found some information finally: https://forum.odroid.com/viewtopic.php?p=330159#p330159

11:15 <tolszak> Leaving this one here in case someone else will google and find this conversation: https://github.com/tassadar777/gpio-wakeup, I will let know if it works

13:35 <tolszak> narmstrong: Everything works as expected, so it is possible to have wakeup on odroid-n2 wih mainline kernel and some 3rd party module

14:08 <narmstrong> tolszak: ok, it's a Hardkernel specific feature, the GPIO number is read here https://github.com/hardkernel/u-boot/commit/87a36d6c4f93e101c021cd2481e0fd14f5f8ba46#diff-4b5a20bf63b758ebf3148bd9da3a4afb269d72469e4fb34e858c77ec5a1e59e4R68

14:09 <tolszak> narmstrong: Ah so it actually is handled by u-boot right?

14:09 <narmstrong> tolszak: no, by the BL301 FW which is built with u-boot

14:10 <tolszak> Ah I see,

14:10 <tolszak> That's the firmware, and kernel need to write to some kind of register before shut down to enable it

14:11 <narmstrong> yep

14:11 <tolszak> I don't know if it has some side effects, but I suppose shouldn't

14:12 <narmstrong> there's no, but no sure this could go upstream

14:12 <tolszak> narmstrong: And it seems to work instantly, no need to ground pin for 2 seconds

14:12 <tolszak> narmstrong: For me it is OK to maintain such simple module

14:12 <tolszak> for my purpose

14:13 <tolszak> narmstrong: with youcto it is somewhat enjoyable