diff --git a/sys/dev/mmc/host/dwmmc.c b/sys/dev/mmc/host/dwmmc.c
index d9e38071defe..29e6da8e58f0 100644
--- a/sys/dev/mmc/host/dwmmc.c
+++ b/sys/dev/mmc/host/dwmmc.c
@@ -1096,6 +1096,10 @@ dwmmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
 		break;
 	case MMCBR_IVAR_MAX_DATA:
 		*(int *)result = sc->desc_count;
+		break;
+	case MMCBR_IVAR_TIMING:
+		*(int *)result = sc->host.ios.timing;
+		break;
 	}
 	return (0);
 }
@@ -1134,6 +1138,14 @@ dwmmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value)
 	case MMCBR_IVAR_VDD:
 		sc->host.ios.vdd = value;
 		break;
+	case MMCBR_IVAR_TIMING:
+		sc->host.ios.timing = value;
+		break;
+
+	/* Not handled */
+	case MMCBR_IVAR_VCCQ:
+		return (0);
+		break;
 	/* These are read-only */
 	case MMCBR_IVAR_CAPS:
 	case MMCBR_IVAR_HOST_OCR: