Hi, Hans.
v4.13 kernel introduced new fancy warning in the dmesg:
===
kernel: acpi INT0002:00: Device [GPED] is in always present list
kernel: genirq: Flags mismatch irq 9. 00010084 (INT0002) vs. 00002080 (acpi)
kernel: INT0002 Virtual GPIO INT0002:00: Error requesting IRQ 9: -16
kernel: INT0002 Virtual GPIO: probe of INT0002:00 failed with error -16
===
Looking at git log, I've found that this driver was indeed introduced in v4.13
by the following commit:
===
commit 63dada87f7ef7d4a536765c816fbbe7c4b9f3c85
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Mon Jun 12 22:55:46 2017 +0200
platform/x86: Add driver for ACPI INT0002 Virtual GPIO device
===
I've checked DSDT disassembly for this device, and here is relevant snippet
[1]. The only thing I currently understand there is that IRQ 9 is hard coded
(line 64), but I'm not sure where those flags come from.
The hardware in J3710 CPU on ASRock J3710-ITX motherboard.
Next, I've found that you also faced this warning and posted some RFC patch
[2], but unfortunately I do not see what that discussion ended up with.
It is not that I really need GPIO on this board, but it would be nice to get
rid of this warning. Could you please point me to a possible fix or a way for
further investigation?
Thanks.
Regards,
Oleksandr
[1] https://gist.github.com/2c69d6e4eb4b5c256601847a9c6aec45
[2] https://patchwork.kernel.org/patch/9671783/
