[S] Change in coreboot[master]: superio/acpi/pnp_generic.asl: Add _PRS for each device

[Martin Roth (Code Review)]

Martin Roth has submitted this change. ( https://review.coreboot.org/c/coreboot/+/64218 )

Change subject: superio/acpi/pnp_generic.asl: Add _PRS for each device
......................................................................

superio/acpi/pnp_generic.asl: Add _PRS for each device

Simply return the current resource settings in the _PRS method. This
means that coreboot has to correctly set up the resources on the
device. This won't result in any regression as without _PRS the ACPI
OS would not know what resources settings are valid, so it would never
use _SRS.

Change-Id: I2726714cbe076fc7c772c06883d8551400ff2baa
Signed-off-by: Arthur Heymans 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64218
Reviewed-by: Nico Huber 
Reviewed-by: Elyes Haouas 
Tested-by: build bot (Jenkins) 
Reviewed-by: Martin Roth 
---
M src/superio/acpi/pnp_generic.asl
1 file changed, 29 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Nico Huber: Looks good to me, but someone else must approve
  Elyes Haouas: Looks good to me, approved
  Martin Roth: Looks good to me, approved

diff --git a/src/superio/acpi/pnp_generic.asl b/src/superio/acpi/pnp_generic.asl
index d0d9a2d..2bcc139 100644
--- a/src/superio/acpi/pnp_generic.asl
+++ b/src/superio/acpi/pnp_generic.asl
@@ -171,4 +171,12 @@
    	  Store (One, PNP_DEVICE_ACTIVE)
    	EXIT_CONFIG_MODE ()
    }
+
+	/* This is used for _SRS. Since _DIS only disables the device
+	 * without changing the resources this works.
+	 */
+	Method (_PRS, 0)
+	{
+		return (_CRS)
+	}
 }