spi: define SPI_XFER_ONCE
The flag combination "SPI_XFER_BEGIN | SPI_XFER_END" is a common use
case of spi_xfer, and it can easily cause an already long line (spi_xfer
takes 5 parameters) to go over the 80 character limit.
define SPI_XFER_ONCE to be a shorter version of the above flag combination.
Cc: Tom Rini <trini@ti.com>
Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
diff --git a/include/spi.h b/include/spi.h
index 67da75c..e2563c9 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -29,6 +29,7 @@
#define SPI_XFER_END 0x02 /* Deassert CS after transfer */
#define SPI_XFER_MMAP 0x08 /* Memory Mapped start */
#define SPI_XFER_MMAP_END 0x10 /* Memory Mapped End */
+#define SPI_XFER_ONCE (SPI_XFER_BEGIN | SPI_XFER_END)
/* Header byte that marks the start of the message */
#define SPI_PREAMBLE_END_BYTE 0xec