amd/pi: Add AMD fam16h TPM ACPI path support

Change-Id: I5322d731a0dc655f2da14b87fa6cbc1e54b5abd5
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/18522
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/southbridge/amd/pi/hudson/lpc.c

@@ -30,6 +30,7 @@
 #include <pc80/i8259.h>
 #include "hudson.h"
 #include <vboot/vbnv.h>
+#include "pci_devs.h"
 
 static void lpc_init(device_t dev)
 {
@@ -338,6 +339,17 @@ unsigned long acpi_fill_mcfg(unsigned long current)
 	return current;
 }
 
+static const char *lpc_acpi_name(struct device *dev)
+{
+	if (dev->path.type != DEVICE_PATH_PCI)
+		return NULL;
+
+	if (dev->path.pci.devfn == LPC_DEVFN)
+		return "LIBR";
+
+	return NULL;
+}
+
 static struct pci_operations lops_pci = {
 	.set_subsystem = pci_dev_set_subsystem,
 };
@@ -352,6 +364,7 @@ static struct device_operations lpc_ops = {
 	.init = lpc_init,
 	.scan_bus = scan_lpc_bus,
 	.ops_pci = &lops_pci,
+	.acpi_name = lpc_acpi_name,
 };
 
 static const unsigned short pci_device_ids[] = {

src/southbridge/amd/pi/hudson/pci_devs.h

@@ -86,6 +86,7 @@
 
 /* LPC BUS */
 #define PCU_DEV			0x14
+#define LPC_DEV			PCU_DEV
 #define LPC_FUNC		3
 #define LPC_DEVID		0x780E
 #define LPC_DEVFN		PCI_DEVFN(LPC_DEV,LPC_FUNC)