Messages in this thread |  | | From | Oleksandr Natalenko <> | Subject | Failed IRQ assignment for INT0002 on Braswell | Date | Tue, 21 Nov 2017 23:35:28 +0100 |
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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@redhat.com> 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/
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