sb/intel/bd82x6x/finalize: Lock ETR3 CF9GR
Lock CF9GR as documented in "100-series-chipset-datasheet-vol-2.pdf"
Change-Id: I2cb30267a6342db1f3b11715034219ffb18ca678
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/19543
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/southbridge/intel/bd82x6x/finalize.c b/src/southbridge/intel/bd82x6x/finalize.c
index 4e08fc6..9c453e4 100644
--- a/src/southbridge/intel/bd82x6x/finalize.c
+++ b/src/southbridge/intel/bd82x6x/finalize.c
@@ -65,6 +65,9 @@
/* GEN_PMCON Lock */
pci_or_config8(PCH_LPC_DEV, GEN_PMCON_LOCK, (1 << 1) | (1 << 2));
+ /* ETR3: CF9GR Lockdown */
+ pci_update_config32(PCH_LPC_DEV, ETR3, ~ETR3_CF9GR, ETR3_CF9LOCK);
+
/* R/WO registers */
RCBA32(0x21a4) = RCBA32(0x21a4);
pci_write_config32(PCI_DEV(0, 27, 0), 0x74,