@@ -99,6 +99,16 @@ void spi_controller_dma_unmap_mem_op_data(struct spi_controller *ctlr,
 }
 EXPORT_SYMBOL_GPL(spi_controller_dma_unmap_mem_op_data);
 
+static int spi_check_dtr_req(struct spi_mem *mem, bool tx)
+{
+	u32 mode = mem->spi->mode;
+
+	if ((tx && (mode & SPI_TX_DTR)) || (!tx && (mode & SPI_RX_DTR)))
+		return 0;
+
+	return -ENOTSUPP;
+}
+
 static int spi_check_buswidth_req(struct spi_mem *mem, u8 buswidth, bool tx)
 {
 	u32 mode = mem->spi->mode;

@@ -154,6 +164,19 @@ bool spi_mem_default_supports_op(struct spi_mem *mem,
 				   op->data.dir == SPI_MEM_DATA_OUT))
 		return false;
 
+	if (op->cmd.is_dtr && spi_check_dtr_req(mem, true))
+		return false;
+
+	if (op->addr.is_dtr && spi_check_dtr_req(mem, true))
+		return false;
+
+	if (op->dummy.is_dtr && spi_check_dtr_req(mem, true))
+		return false;
+
+	if (op->data.dir != SPI_MEM_NO_DATA && op->data.is_dtr &&
+	    spi_check_dtr_req(mem, op->data.dir == SPI_MEM_DATA_OUT))
+		return false;
+
 	return true;
 }
 EXPORT_SYMBOL_GPL(spi_mem_default_supports_op);

@@ -71,6 +71,7 @@ enum spi_mem_data_dir {
  * struct spi_mem_op - describes a SPI memory operation
  * @cmd.buswidth: number of IO lines used to transmit the command
  * @cmd.opcode: operation opcode
+ * @cmd.is_dtr: whether the command opcode should be sent in DTR mode or not
  * @addr.nbytes: number of address bytes to send. Can be zero if the operation
  *		 does not need to send an address
  * @addr.buswidth: number of IO lines used to transmit the address cycles

@@ -78,10 +79,13 @@ enum spi_mem_data_dir {
  *	      Note that only @addr.nbytes are taken into account in this
  *	      address value, so users should make sure the value fits in the
  *	      assigned number of bytes.
+ * @addr.is_dtr: whether the address should be sent in DTR mode or not
  * @dummy.nbytes: number of dummy bytes to send after an opcode or address. Can
  *		  be zero if the operation does not require dummy bytes
  * @dummy.buswidth: number of IO lanes used to transmit the dummy bytes
+ * @dummy.is_dtr: whether the dummy bytes should be sent in DTR mode or not
  * @data.buswidth: number of IO lanes used to send/receive the data
+ * @data.is_dtr: whether the data should be sent in DTR mode or not
  * @data.dir: direction of the transfer
  * @data.nbytes: number of data bytes to send/receive. Can be zero if the
  *		 operation does not involve transferring data

@@ -92,21 +96,25 @@ struct spi_mem_op {
 	struct {
 		u8 buswidth;
 		u8 opcode;
+		bool is_dtr;
 	} cmd;
 
 	struct {
 		u8 nbytes;
 		u8 buswidth;
 		u64 val;
+		bool is_dtr;
 	} addr;
 
 	struct {
 		u8 nbytes;
 		u8 buswidth;
+		bool is_dtr;
 	} dummy;
 
 	struct {
 		u8 buswidth;
+		bool is_dtr;
 		enum spi_mem_data_dir dir;
 		unsigned int nbytes;
 		union {