[S] Change in coreboot[master]: soc/intel/meteorlake: Hide PMC and IOM devices

[Kapil Porwal (Code Review)]

Kapil Porwal has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/69576 )

Change subject: soc/intel/meteorlake: Hide PMC and IOM devices
......................................................................

soc/intel/meteorlake: Hide PMC and IOM devices

Hide these ACPI device so Windows does not warn about missing device
drivers.

Port of commit 907c85ad48dd (soc/intel/alderlake: Hide PMC and IOM devices).

BUG=none
TEST=Verified _STA method from ACPI tables in OS.

Signed-off-by: Kapil Porwal 
Change-Id: Ic62172bee9120d260a3cd60770ef780cb7dce860
---
M src/soc/intel/meteorlake/acpi/tcss.asl
M src/soc/intel/meteorlake/pmc.c
2 files changed, 22 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/76/69576/1

diff --git a/src/soc/intel/meteorlake/acpi/tcss.asl b/src/soc/intel/meteorlake/acpi/tcss.asl
index c2212f0..817afdd 100644
--- a/src/soc/intel/meteorlake/acpi/tcss.asl
+++ b/src/soc/intel/meteorlake/acpi/tcss.asl
@@ -327,6 +327,8 @@
    			IOM_BASE_ADDR, IOM_BASE_ADDR_MAX, 0x0,
    			IOM_BASE_SIZE,,,)
    	})
+		/* Hide the device so that Windows does not complain on missing driver */
+		Name (_STA, 0xB)
    }

/*
diff --git a/src/soc/intel/meteorlake/pmc.c b/src/soc/intel/meteorlake/pmc.c
index dbfc4be..bdd7a3b 100644
--- a/src/soc/intel/meteorlake/pmc.c
+++ b/src/soc/intel/meteorlake/pmc.c
@@ -103,6 +103,8 @@

acpigen_write_name_string("_HID", PMC_HID);
    acpigen_write_name_string("_DDN", "Intel(R) Meteor Lake IPC Controller");
+	/* Hide the device so that Windows does not complain on missing driver */
+	acpigen_write_STA(ACPI_STATUS_DEVICE_HIDDEN_ON);

/*
     * Part of the PCH's reserved 32 MB MMIO range (0xFC800000 - 0xFE7FFFFF).