diff --git a/arch/arm/src/s32k1xx/hardware/s32k1xx_dmamux.h b/arch/arm/src/s32k1xx/hardware/s32k1xx_dmamux.h
new file mode 100644
index 0000000000..3208530c6d
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+++ b/arch/arm/src/s32k1xx/hardware/s32k1xx_dmamux.h
@@ -0,0 +1,76 @@
+/********************************************************************************************
+ * arch/arm/src/s32k1xx/chip/s32k1xx_dmamux.h
+ *
+ *   Copyright (C) 2019 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_S32K1XX_HARDWARE_S32K1XX_DMAMUX_H
+#define __ARCH_ARM_SRC_S32K1XX_HARDWARE_S32K1XX_DMAMUX_H
+
+/********************************************************************************************
+ * Included Files
+ ********************************************************************************************/
+
+#include <nuttx/config.h>
+#include <hardware/s32k1xx_memorymap.h>
+
+/********************************************************************************************
+ * Pre-processor Definitions
+ ********************************************************************************************/
+
+/* Number of DMA channels */
+
+#if defined(CONFIG_ARCH_CHIP_S32K11X)
+#  define S32K1XX_NDMACH  4
+#elif defined(CONFIG_ARCH_CHIP_S32K14X
+#  define S32K1XX_NDMACH  16
+#endif
+
+/* DMAMUX Register Offsets ******************************************************************/
+
+#define S32K1XX_DMAMUX_CHCFG_OFFSET(n)  (n)  /* Channel Configuration register, n=1..15 */
+
+/* DMAMUX Register Addresses ****************************************************************/
+
+#define S32K1XX_DMAMUX_CHCFG(n)         (S32K1XX_DMAMUX_BASE + S32K1XX_DMAMUX_CHCFG_OFFSET(n)) n=1..15 */
+
+/* DMAMUX Register Bitfield Definitions *****************************************************/
+
+/* Channel Configuration register, n=1..15 */
+
+#define DMAMUX_CHCFG_SOURCE_SHIFT       (0)       /* Bits 0-5:  DMA Channel Source (Slot) */
+#define DMAMUX_CHCFG_SOURCE_MASK        (0x3f << DMAMUX_CHCFG_SOURCE_SHIFT)
+#  define DMAMUX_CHCFG_SOURCE(s)        ((uint32_t)(s) << DMAMUX_CHCFG_SOURCE_SHIFT) /* chip-specific */
+#define DMAMUX_CHCFG_TRIG               (1 << 6)  /* Bit 6:  DMA Channel Trigger Enable */
+#define DMAMUX_CHCFG_ENBL               (1 << 7)  /* Bit 7:  DMA Channel Enable */
+
+#endif /* __ARCH_ARM_SRC_S32K1XX_HARDWARE_S32K1XX_DMAMUX_H */