diff --git a/marvell/linux/sound/atmel/ac97c.h b/marvell/linux/sound/atmel/ac97c.h
new file mode 100644
index 0000000..6fe9245
--- /dev/null
+++ b/marvell/linux/sound/atmel/ac97c.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Register definitions for Atmel AC97C
+ *
+ * Copyright (C) 2005-2009 Atmel Corporation
+ */
+#ifndef __SOUND_ATMEL_AC97C_H
+#define __SOUND_ATMEL_AC97C_H
+
+#define AC97C_MR		0x08
+#define AC97C_ICA		0x10
+#define AC97C_OCA		0x14
+#define AC97C_CARHR		0x20
+#define AC97C_CATHR		0x24
+#define AC97C_CASR		0x28
+#define AC97C_CAMR		0x2c
+#define AC97C_CORHR		0x40
+#define AC97C_COTHR		0x44
+#define AC97C_COSR		0x48
+#define AC97C_COMR		0x4c
+#define AC97C_SR		0x50
+#define AC97C_IER		0x54
+#define AC97C_IDR		0x58
+#define AC97C_IMR		0x5c
+#define AC97C_VERSION		0xfc
+
+#define AC97C_CATPR		PDC_TPR
+#define AC97C_CATCR		PDC_TCR
+#define AC97C_CATNPR		PDC_TNPR
+#define AC97C_CATNCR		PDC_TNCR
+#define AC97C_CARPR		PDC_RPR
+#define AC97C_CARCR		PDC_RCR
+#define AC97C_CARNPR		PDC_RNPR
+#define AC97C_CARNCR		PDC_RNCR
+#define AC97C_PTCR		PDC_PTCR
+
+#define AC97C_MR_ENA		(1 << 0)
+#define AC97C_MR_WRST		(1 << 1)
+#define AC97C_MR_VRA		(1 << 2)
+
+#define AC97C_CSR_TXRDY		(1 << 0)
+#define AC97C_CSR_TXEMPTY	(1 << 1)
+#define AC97C_CSR_UNRUN		(1 << 2)
+#define AC97C_CSR_RXRDY		(1 << 4)
+#define AC97C_CSR_OVRUN		(1 << 5)
+#define AC97C_CSR_ENDTX		(1 << 10)
+#define AC97C_CSR_ENDRX		(1 << 14)
+
+#define AC97C_CMR_SIZE_20	(0 << 16)
+#define AC97C_CMR_SIZE_18	(1 << 16)
+#define AC97C_CMR_SIZE_16	(2 << 16)
+#define AC97C_CMR_SIZE_10	(3 << 16)
+#define AC97C_CMR_CEM_LITTLE	(1 << 18)
+#define AC97C_CMR_CEM_BIG	(0 << 18)
+#define AC97C_CMR_CENA		(1 << 21)
+#define AC97C_CMR_DMAEN		(1 << 22)
+
+#define AC97C_SR_CAEVT		(1 << 3)
+#define AC97C_SR_COEVT		(1 << 2)
+#define AC97C_SR_WKUP		(1 << 1)
+#define AC97C_SR_SOF		(1 << 0)
+
+#define AC97C_CH_MASK(slot)						\
+	(0x7 << (3 * (AC97_SLOT_##slot - 3)))
+#define AC97C_CH_ASSIGN(slot, channel)					\
+	(AC97C_CHANNEL_##channel << (3 * (AC97_SLOT_##slot - 3)))
+#define AC97C_CHANNEL_NONE	0x0
+#define AC97C_CHANNEL_A		0x1
+
+#endif /* __SOUND_ATMEL_AC97C_H */