1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index b354dcbed55b..31a5b0ee93ec 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -347,6 +347,8 @@ struct spi_master {
 #define SPI_MASTER_HALF_DUPLEX  BIT(0)          /* can't do full duplex */
 #define SPI_MASTER_NO_RX        BIT(1)          /* can't do buffer read */
 #define SPI_MASTER_NO_TX        BIT(2)          /* can't do buffer write */
+#define SPI_MASTER_MUST_RX      BIT(3)          /* requires rx */
+#define SPI_MASTER_MUST_TX      BIT(4)          /* requires tx */
 
         /* lock and mutex for SPI bus locking */
         spinlock_t              bus_lock_spinlock;
@@ -443,6 +445,10 @@ struct spi_master {
         /* DMA channels for use with core dmaengine helpers */
         struct dma_chan         *dma_tx;
         struct dma_chan         *dma_rx;
+
+        /* dummy data for full duplex devices */
+        void                    *dummy_rx;
+        void                    *dummy_tx;
 };
 
 static inline void *spi_master_get_devdata(struct spi_master *master)