topic Re: key_power button not getting interrupts in i.MX Processors

key_power button not getting interrupts

anantha_r — Fri, 03 May 2019 11:17:45 GMT

Hi all,

I am trying to enable power_btn in imx8qm by adding

gpio-keys {
compatible = "gpio-keys";
label = "gpio-keys";
status = "okay";

power_btn: power_btn {
status = "okay";
label = "key_power";
linux,code = <KEY_POWER>;
gpios = <&gpiox xx GPIO_ACTIVE_LOW>;
debounce-interval = <10>;
wakeup-source;
linux,input-type = <EV_KEY>;
};

in dts file.

When I check /proc/interrupts the interrupt is registered, but no interrupts are generated when pressing the button.

Thanks in advance

Anantha

Re: key_power button not getting interrupts

igorpadykov — Sun, 05 May 2019 22:48:33 GMT

Hi Anantha

for linux KEY_POWER example one can look on

sc_pwrkey: sc-powerkey {
       compatible = "fsl,imx8-pwrkey";
       linux,keycode = <KEY_POWER>;
       wakeup-source;
   };
fsl-imx8qm-device.dtsi\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel

Best regards
igor
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Re: key_power button not getting interrupts

anantha_r — Tue, 07 May 2019 06:00:30 GMT

Thanks for your reply igorpadykov,

I got this solved. The iomuxing for the pin was not carried out properly and hence failing. But now have one more issue. When the device goes to suspend or lock mode when the power button is pressed, its not able to resume on a power button press. The CPUs(except CPU0) are going to sleep and hence need to do a hard boot to bringup the board again

Thanks in advance

Anantha

Re: key_power button not getting interrupts

igorpadykov — Tue, 07 May 2019 10:42:06 GMT

Hi Anantha

for gpio-keys one can try property:

gpio-key,wakeup;

Best regards
igor

Re: key_power button not getting interrupts

anantha_r — Tue, 07 May 2019 11:19:55 GMT

Hi Igor,

That property is already present, but still it gets stuck in suspend mode even if the power button is re-pressed

Thanks,

Anantha

Re: key_power button not getting interrupts

anantha_r — Thu, 25 Jul 2019 06:29:33 GMT

Hi,

Here is the log that I get when I do a power button press.

[   60.398833] PM: suspend entry (deep)
[   60.402456] PM: Syncing filesystems ... done.
[   60.417574] Freezing user space processes ... (elapsed 0.002 seconds) done.
[   60.426965] OOM killer disabled.
[   60.430194] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
[   60.440253] Suspending console(s) (use no_console_suspend to debug)
[   60.466829] PM: Wakeup pending, aborting suspend
[   60.487606] PM: Some devices failed to suspend, or early wake event detected
[   60.638575] PM: resume devices took 0.144 seconds
[   60.647887] pwm-backlight lvds_backlight@1: lvds_backlight@1 supply power not found, using dummy regulator
[   60.664810] OOM killer enabled.
[   60.667971] Restarting tasks ... done.
[   60.675136] PM: suspend exit
[   61.078573] PM: suspend entry (deep)
[   61.082160] PM: Syncing filesystems ... done.
[   61.248713] Freezing user space processes ... (elapsed 0.002 seconds) done.
[   61.257865] OOM killer disabled.
[   61.261108] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[   61.270855] Suspending console(s) (use no_console_suspend to debug)

After this only way is to Hard reset the board to recover

Please help in this

Re: key_power button not getting interrupts

igorpadykov — Thu, 25 Jul 2019 15:04:41 GMT

in your log there is "naiad_8qxp", in original post

it is "imx8qm", suggest to identify used processor and use

appropriate software for it. Please use

linux-imx - i.MX Linux kernel

~igor

Re: key_power button not getting interrupts

anantha_r — Thu, 25 Jul 2019 15:23:15 GMT

Hi,

Actually I see this observation in both imx8qm as well as imx8qxp. Initially we used imx8qm and then changed to imx8qxp. Hence u saw that qxp in the log. Let me know what could b the reason for this issue

Re: key_power button not getting interrupts

igorpadykov — Fri, 26 Jul 2019 00:40:17 GMT

for i.MX8QX/QM seems interrupts should be consfigured by scfw

SCFW Porting Kit

Best regards
igor

Re: key_power button not getting interrupts

anantha_r — Fri, 26 Jul 2019 02:47:57 GMT

The interrupt is getting configured properly and hence I am seeing that the device goes to suspend mode when I do a power button press. The issue is that the device doesn't wake up when I re-press the button. The interrupt is configured as a Edge triggered interrupt

Re: key_power button not getting interrupts

igorpadykov — Fri, 26 Jul 2019 07:15:12 GMT

wake capabilities also configured by scfw

Best regards
igor

Re: key_power button not getting interrupts

mrcryo — Wed, 13 Nov 2019 15:45:20 GMT

Hi Anantha,

Check whether one adds debug_console property to pd_* node of lpuart that you use as a system console.
Tell console to not suspend:
```
echo "N" > /sys/module/printk/parameters/console_suspend
```
This is required to not suspend console and see what's happening.
Add pad-wakeup and pad-wakeup-num properties to gpioX node, that is used as a wake-up source. Read a description of properties in drivers/gpio/gpio-mxc.c

Re: key_power button not getting interrupts

taolu — Thu, 02 Apr 2020 09:01:58 GMT

Hi Anantha,

Could you show the details about how to solve the problem which press power button to let system go to suspend?

I also met this problem. The power button uses ON_OFF_BUTTON as iomux, it seems controlled by scu, but i can not find where to set the configuration.

Also, i want to know the latest progress about re-press the power button.^-^

Thanks a lot in advance!

Tony.