tree 474a1ea1a952bdc6825d26c19b0ee489c59a1a1e
parent 53f26e400db0a739941fdbebc215ea5fb177f9d8
author Michał Żygowski <michal.zygowski@3mdeb.com> 1707910232 +0100
committer Felix Held <felix-coreboot@felixheld.de> 1709307468 +0000

superio/acpi: Add SUPERIO_PNP_NO_DIS to support always active LDNs

Some LDNs do not implement the activate bit at all, e.g. ITE GPIO LDNs
are an example where the LDN is always active. The pnp_generic.asl can
be used to describe the GPIO LDN resources configured by the platform,
however the register 0x30 is always 0 for these LDNs, so OS will not
claim the reported resource for the GPIO device, because _STA will
return inactive LDN.

Add SUPERIO_PNP_NO_DIS macro to generate _STA method returning an
always active LDN and skip _DIS generation. Define the SUPERIO_PNP_NO_DIS
for SIOs which use the pnp_generic.asl preserving the previous states,
except the ITE GPIO LDNs.

Change-Id: Ieb827fdffe7660b875cba6ca99b0560b4cab66b4
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80496
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>