diff --git a/src/soc/intel/pantherlake/Makefile.mk b/src/soc/intel/pantherlake/Makefile.mk
index b7ea31b1f6..24ef2e9d27 100644
--- a/src/soc/intel/pantherlake/Makefile.mk
+++ b/src/soc/intel/pantherlake/Makefile.mk
@@ -8,6 +8,7 @@ subdirs-y += ../../../cpu/intel/turbo
 
 # all (bootblock, verstage, romstage, postcar, ramstage)
 all-y += gpio.c
+all-y += isclk.c
 
 bootblock-y += bootblock/bootblock.c
 bootblock-y += bootblock/pcd.c
diff --git a/src/soc/intel/pantherlake/include/soc/isclk.h b/src/soc/intel/pantherlake/include/soc/isclk.h
new file mode 100644
index 0000000000..dfa072eb5a
--- /dev/null
+++ b/src/soc/intel/pantherlake/include/soc/isclk.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _SOC_PANTHERLAKE_ISCLK_H_
+#define _SOC_PANTHERLAKE_ISCLK_H_
+
+#include <types.h>
+
+/* Disable PCIe clock source; clock_number: 0-based */
+void soc_disable_pcie_clock_out(size_t clock_number);
+
+/* Enable PCIe clock source; clock_number: 0-based */
+void soc_enable_pcie_clock_out(size_t clock_number);
+
+#endif /* _SOC_PANTHERLAKE_ISCLK_H_ */
diff --git a/src/soc/intel/pantherlake/isclk.c b/src/soc/intel/pantherlake/isclk.c
new file mode 100644
index 0000000000..649dcc843b
--- /dev/null
+++ b/src/soc/intel/pantherlake/isclk.c
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <intelblocks/pcr.h>
+#include <soc/iomap.h>
+#include <soc/isclk.h>
+#include <soc/pcr_ids.h>
+
+#define ISCLK_PCR_BIOS_BUFFEN_H 0x8080
+
+/* Disable PCIe clock source; clock_number: 0-based */
+void soc_disable_pcie_clock_out(size_t clock_number)
+{
+	pcr_rmw32(PID_ISCLK, ISCLK_PCR_BIOS_BUFFEN_H, ~BIT(clock_number), 0);
+}
+
+/* Enable PCIe clock source; clock_number: 0-based */
+void soc_enable_pcie_clock_out(size_t clock_number)
+{
+	pcr_or32(PID_ISCLK, ISCLK_PCR_BIOS_BUFFEN_H, BIT(clock_number));
+}