2 files changed, 29 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/pmc.h b/src/soc/intel/common/block/include/intelblocks/pmc.h
index 329bbe9bd7..75e212740d 100644
--- a/src/soc/intel/common/block/include/intelblocks/pmc.h
+++ b/src/soc/intel/common/block/include/intelblocks/pmc.h
@@ -51,4 +51,13 @@ int pmc_soc_get_resources(struct pmc_resource_config *cfg);
 /* API to set ACPI mode */
 void pmc_set_acpi_mode(void);
 
+/*
+ * Returns a reference to the PMC MUX device for the given port number.
+ * Returns NULL if not found or SoC does not support PMC MUX.
+ *
+ * Input: Port number (0-based)
+ * Output: Const pointer to PMC MUX device
+ */
+const struct device *soc_get_pmc_mux_device(int port_number);
+
 #endif /* SOC_INTEL_COMMON_BLOCK_PMC_H */
diff --git a/src/soc/intel/tigerlake/pmc.c b/src/soc/intel/tigerlake/pmc.c
index c24898faf3..84a18e3865 100644
--- a/src/soc/intel/tigerlake/pmc.c
+++ b/src/soc/intel/tigerlake/pmc.c
@@ -11,6 +11,7 @@
 #include <console/console.h>
 #include <device/mmio.h>
 #include <device/device.h>
+#include <drivers/intel/pmc_mux/chip.h>
 #include <intelblocks/pmc.h>
 #include <intelblocks/pmclib.h>
 #include <intelblocks/rtc.h>
@@ -123,6 +124,25 @@ static void soc_pmc_fill_ssdt(const struct device *dev)
 	       dev_path(dev));
 }
 
+/* By default, TGL uses the PMC MUX for all ports, so port_number is unused */
+const struct device *soc_get_pmc_mux_device(int port_number)
+{
+	const struct device *pmc;
+	struct device *child;
+
+	child = NULL;
+	pmc = pcidev_path_on_root(PCH_DEVFN_PMC);
+	if (!pmc || !pmc->link_list)
+		return NULL;
+
+	while ((child = dev_bus_each_child(pmc->link_list, child)) != NULL)
+		if (child->chip_ops == &drivers_intel_pmc_mux_ops)
+			break;
+
+	/* child will either be the correct device or NULL if not found */
+	return child;
+}
+
 struct device_operations pmc_ops = {
 	.read_resources	  = soc_pmc_read_resources,
 	.set_resources	  = noop_set_resources,