diff --git a/drivers/mfd/rockchip-flexbus.c b/drivers/mfd/rockchip-flexbus.c
index 485c1d6a3d51..4109a7112c9f 100644
--- a/drivers/mfd/rockchip-flexbus.c
+++ b/drivers/mfd/rockchip-flexbus.c
@@ -21,13 +21,6 @@
 #include <dt-bindings/mfd/rockchip-flexbus.h>
 #include <linux/mfd/rockchip-flexbus.h>
 
-enum rockchip_flexbus_tx_rx_mode {
-	FLEXBUS_TX_AND_RX = 0x0,
-	FLEXBUS_TX_ONLY = 0x1,
-	FLEXBUS_RX_ONLY = 0x2,
-	FLEXBUS_TX_THEN_RX = 0x3,
-};
-
 unsigned int rockchip_flexbus_readl(struct rockchip_flexbus *rkfb, unsigned int reg)
 {
 	return readl_relaxed(rkfb->base + reg);
diff --git a/include/linux/mfd/rockchip-flexbus.h b/include/linux/mfd/rockchip-flexbus.h
index fb92a63a1440..3af9cb19ef89 100644
--- a/include/linux/mfd/rockchip-flexbus.h
+++ b/include/linux/mfd/rockchip-flexbus.h
@@ -21,6 +21,9 @@
 #define FLEXBUS_TX_NUM			0x044
 #define FLEXBUS_TXWAT_START		0x048
 #define FLEXBUS_TXFIFO_DNUM		0x04C
+#define FLEXBUS_TX_CMD_LEN		0x058
+#define FLEXBUS_TX_CMD0			0x05C
+#define FLEXBUS_TX_CMD1			0x060
 #define FLEXBUS_RX_CTL			0x080
 #define FLEXBUS_RX_NUM			0x084
 #define FLEXBUS_RXFIFO_DNUM		0x088
@@ -60,11 +63,20 @@
 #define FLEXBUS_RX_FREE_MODE		(BIT(16 + 1) | BIT(1))
 #define FLEXBUS_TX_FREE_MODE		(BIT(16) | BIT(0))
 
+/* Bit fields in COM_CTL */
+#define FLEXBUS_TX_AND_RX		0x0
+#define FLEXBUS_TX_ONLY			0x1
+#define FLEXBUS_RX_ONLY			0x2
+#define FLEXBUS_TX_THEN_RX		0x3
+#define FLEXBUS_SCLK_SHARE		BIT(2)
+#define FLEXBUS_TX_USE_RX		BIT(3)
+
 /* Bit fields in SLAVE_MODE */
 #define FLEXBUS_DVP_SEL			BIT(1)
 #define FLEXBUS_CLK1_IN			BIT(0)
 
 /* Bit fields in TX_CTL and RX_CTL */
+#define FLEXBUS_MSB			BIT(15)
 #define FLEXBUS_CONTINUE_MODE		BIT(4)
 #define FLEXBUS_CPOL			BIT(3)
 #define FLEXBUS_CPHA			BIT(2)
@@ -72,6 +84,7 @@
 
 /* Bit fields in RX_CTL */
 #define FLEXBUS_AUTOPAD			BIT(14)
+#define FLEXBUS_RXD_DY			BIT(5)
 
 /* Bit fields in DMA_WAT_INT */
 #define FLEXBUS_SRC_WAT_LVL_MASK	0x3