southbridge/amd: Add LPC bridge acpi path for Family14 and SB800
Adds the necessary plumbing for acpi_device_path() to find the LPC
bridge on the AMD Family14 northbridge with an SB800 southbridge.
This is necessary for TPM support since the acpi path to the LPC bridge
(_SB.PCI0.ISAB) doesn't match the built-in default in tpm.c
(_SB.PCI0.LPCB).
Change-Id: I1ba5865d3531d8a4f41399802d58aacdf95fc604
Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Reviewed-on: https://review.coreboot.org/18402
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins)
diff --git a/src/southbridge/amd/cimx/sb800/late.c b/src/southbridge/amd/cimx/sb800/late.c
index fa47a96..a7076a6 100644
--- a/src/southbridge/amd/cimx/sb800/late.c
+++ b/src/southbridge/amd/cimx/sb800/late.c
@@ -34,6 +34,7 @@
#include "sb_cimx.h" /* AMD CIMX wrapper entries */
#include "smbus.h"
#include "fan.h"
+#include "pci_devs.h"
#include <southbridge/amd/common/amd_pci_util.h>
/*implement in mainboard.c*/
@@ -150,6 +151,20 @@
return current;
}
+static const char *lpc_acpi_name(struct device *dev)
+{
+ if (dev->path.type != DEVICE_PATH_PCI)
+ return NULL;
+
+ switch (dev->path.pci.devfn) {
+ /* DSDT: acpi/lpc.asl */
+ case LPC_DEVFN:
+ return "LIBR";
+ }
+
+ return NULL;
+}
+
static struct device_operations lpc_ops = {
.read_resources = lpc_read_resources,
.set_resources = lpc_set_resources,
@@ -160,6 +175,7 @@
.init = lpc_init,
.scan_bus = scan_lpc_bus,
.ops_pci = &lops_pci,
+ .acpi_name = lpc_acpi_name,
};
static const struct pci_driver lpc_driver __pci_driver = {