[PATCH 2/9] spi: core: Add flag for controllers that can't hold cs between transfers

[Lucas Tanure]

Create a flag for a controller that has an automatic cs selection and
can't hold cs activated between transfers
Some messages send address and data split between two transfers, see
regmap-spi, and without the cs held the data loses it`s meaning

Signed-off-by: Lucas Tanure <tanureal@xxxxxxxxxxxxxxxxxxxxx>
---
 include/linux/spi/spi.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 8371bca13729..f5b55c237634 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -514,6 +514,7 @@ struct spi_controller {
 #define SPI_CONTROLLER_MUST_TX		BIT(4)	/* requires tx */
 
 #define SPI_MASTER_GPIO_SS		BIT(5)	/* GPIO CS must select slave */
+#define SPI_CONTROLLER_CS_PER_TRANSFER	BIT(6)	/* SPI controller can not hold CS between transfers */
 
 	/* flag indicating if the allocation of this struct is devres-managed */
 	bool			devm_allocated;
-- 
2.33.0