spi: add new SPI_CS_WORD flag

This adds a new SPI mode flag, SPI_CS_WORD, that is used to indicate that a SPI device requires the chip select to be toggled after each word that is transferred. Signed-off-by: David Lechner <[email protected]> Signed-off-by: Mark Brown <[email protected]>
laijs · Sep 17, 2018 · 0baf9eb · 0baf9eb
1 parent 5b394b2
commit 0baf9eb
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
@@ -163,6 +163,7 @@ struct spi_device {
 #define	SPI_TX_QUAD	0x200			/* transmit with 4 wires */
 #define	SPI_RX_DUAL	0x400			/* receive with 2 wires */
 #define	SPI_RX_QUAD	0x800			/* receive with 4 wires */
+#define SPI_CS_WORD	0x1000			/* toggle cs after each word */
 	int			irq;
 	void			*controller_state;
 	void			*controller_data;
@@ -177,7 +178,6 @@ struct spi_device {
 	 * the controller talks to each chip, like:
 	 *  - memory packing (12 bit samples into low bits, others zeroed)
 	 *  - priority
-	 *  - drop chipselect after each word
 	 *  - chipselect delays
 	 *  - ...
 	 */