diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
index 2bd3dc25cb03..7e99c3b1f367 100644
--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -92,7 +92,8 @@ static enum tco_reg_layout tco_reg_layout(struct pci_dev *dev)
 	    dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
 	    dev->revision < 0x40) {
 		return sp5100;
-	} else if (dev->vendor == PCI_VENDOR_ID_AMD &&
+	} else if ((dev->vendor == PCI_VENDOR_ID_AMD ||
+		    dev->vendor == PCI_VENDOR_ID_HYGON) &&
 	    sp5100_tco_pci->device == PCI_DEVICE_ID_AMD_KERNCZ_SMBUS &&
 	    sp5100_tco_pci->revision >= AMD_ZEN_SMBUS_PCI_REV) {
 		return efch_mmio;