1 files changed, 25 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/gspi.c b/src/soc/intel/alderlake/gspi.c
new file mode 100644
index 0000000000..dd07b07f1a
--- /dev/null
+++ b/src/soc/intel/alderlake/gspi.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * This file is created based on Intel Alder Lake Processor PCH Datasheet
+ * Document number: 621483
+ * Chapter number: 11
+ */
+
+#include <intelblocks/gspi.h>
+#include <soc/pci_devs.h>
+
+int gspi_soc_bus_to_devfn(unsigned int gspi_bus)
+{
+	switch (gspi_bus) {
+	case 0:
+		return PCH_DEVFN_GSPI0;
+	case 1:
+		return PCH_DEVFN_GSPI1;
+	case 2:
+		return PCH_DEVFN_GSPI2;
+	case 3:
+		return PCH_DEVFN_GSPI3;
+	}
+	return -1;
+}