soc/amd/cezanne/pcie_gpp: scan internal PCI buses

TEST=The devices on the internal buses now get resources assigned.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: If7ff0f2ecde9189691548e071ddcfe1916933571
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50334
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/cezanne/Makefile.inc

@@ -28,6 +28,7 @@ ramstage-y	+= chip.c
 ramstage-y	+= fch.c
 ramstage-y      += fsp_params.c
 ramstage-y	+= gpio.c
+ramstage-y	+= pcie_gpp.c
 ramstage-y      += reset.c
 ramstage-y	+= uart.c
 

src/soc/amd/cezanne/pcie_gpp.c

@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+
+static struct device_operations internal_pcie_gpp_ops = {
+	.read_resources		= pci_bus_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_bus_enable_resources,
+	.scan_bus		= pci_scan_bridge,
+	.reset_bus		= pci_bus_reset,
+};
+
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_AMD_FAM17H_MODEL60H_PCIE_GPP_BUSABC,
+	0
+};
+
+static const struct pci_driver internal_pcie_gpp_driver __pci_driver = {
+	.ops			= &internal_pcie_gpp_ops,
+	.vendor			= PCI_VENDOR_ID_AMD,
+	.devices		= pci_device_ids,
+};