Re: [PATCH 2/6] hwmon: xgene: Stop writing PCC shared memory signature

From: Guenter Roeck

Date: Mon Jun 29 2026 - 17:13:44 EST


On Sat, Jun 27, 2026 at 05:37:30PM +0100, Sudeep Holla wrote:
> ACPI specification defines the generic PCC shared memory signature as
> the PCC base signature ORed with the subspace ID.
>
> ACPI 6.6 added clarification that the signature is populated by the
> platform and verified by OSPM.
>
> The PCC mailbox controller now validates the signature when the channel
> is requested. Stop rewriting the signature before each command and
> leave the platform-populated value intact.
>
> Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
> Cc: linux-hwmon@xxxxxxxxxxxxxxx
> Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxxxxx>

Applied.

Thanks,
Guenter