Re: [PATCH v3 3/5] mfd: arizona: Add support for ACPI enumeration of WM5102 connected over SPI

From: Mark Brown
Date: Mon Jan 18 2021 - 08:39:40 EST

On Mon, Jan 18, 2021 at 02:13:50PM +0100, Hans de Goede wrote:

> More in general I'm not aware of any (recent-ish) x86 GPIO controllers
> not being able to do active low interrupts. In theory we could hit this
> code path on ARM devices using ACPI enumeration, but I don't think it
> is likely we will see a combination of ARM + ACPI enumeration +
> WM5102 + GPIO controller not capable of active-low interrupts.

I've not seen this issue on any ARM based systems.

> This overriding of the flags definitely is necessary on the Lenovo
> devices in question. I could add a
> "if (dmi_name_in_vendors("LENOVO"))" guard around it, but that
> seems unnecessary.

Possibly just an update to the comment to make it clear that some
firmwares might legitimately set the flag?

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