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spi: Add brackets and tidy defines in spi.h

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Some of the #defines in spi.h are not bracketed. To avoid future mistakes
add brackets. Also add an explanatory comment for SPI_CONN_DUAL_...

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Simon Glass 2014-09-15 06:33:23 -06:00
parent df3b23ae3a
commit 248a0488bf
1 changed files with 12 additions and 12 deletions
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24
include/spi.h
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@ -30,24 +30,24 @@
#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)
#define SPI_XFER_U_PAGE (1 << 5)
#define SPI_XFER_U_PAGE (1 << 5)
/* SPI TX operation modes */
#define SPI_OPM_TX_QPP 1 << 0
#define SPI_OPM_TX_QPP (1 << 0)
/* SPI RX operation modes */
#define SPI_OPM_RX_AS 1 << 0
#define SPI_OPM_RX_DOUT 1 << 1
#define SPI_OPM_RX_DIO 1 << 2
#define SPI_OPM_RX_QOF 1 << 3
#define SPI_OPM_RX_QIOF 1 << 4
#define SPI_OPM_RX_EXTN SPI_OPM_RX_AS | SPI_OPM_RX_DOUT | \
#define SPI_OPM_RX_AS (1 << 0)
#define SPI_OPM_RX_DOUT (1 << 1)
#define SPI_OPM_RX_DIO (1 << 2)
#define SPI_OPM_RX_QOF (1 << 3)
#define SPI_OPM_RX_QIOF (1 << 4)
#define SPI_OPM_RX_EXTN (SPI_OPM_RX_AS | SPI_OPM_RX_DOUT | \
SPI_OPM_RX_DIO | SPI_OPM_RX_QOF | \
SPI_OPM_RX_QIOF
SPI_OPM_RX_QIOF)
/* SPI bus connection options */
#define SPI_CONN_DUAL_SHARED 1 << 0
#define SPI_CONN_DUAL_SEPARATED 1 << 1
/* SPI bus connection options - see enum spi_dual_flash */
#define SPI_CONN_DUAL_SHARED (1 << 0)
#define SPI_CONN_DUAL_SEPARATED (1 << 1)
/* Header byte that marks the start of the message */
#define SPI_PREAMBLE_END_BYTE 0xec