diff options
| author | Baruch Siach <baruch.siach@siklu.com> | 2022-04-11 21:45:27 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-04-19 13:13:47 +0100 |
| commit | b617be33502d2bfefffef71924c7a7ba50264ff6 (patch) | |
| tree | 51945c0a842e3f0a819b29bad019fd89debe981d | |
| parent | 4bbaa857e9af76d8cc346bd57fbaa50d357ae132 (diff) | |
spi: add SPI_RX_CPHA_FLIP mode bit
Some SPI devices latch MOSI bits on one clock phase, but produce valid
MISO bits on the other phase. Add SPI_RX_CPHA_FLIP mode to instruct the
controller driver to flip CPHA for Rx (MISO) only transfers.
Signed-off-by: Baruch Siach <baruch.siach@siklu.com>
Link: https://lore.kernel.org/r/a715ca92713ca02071f33dcca9960a66a03c949a.1649702729.git.baruch@tkos.co.il
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | include/uapi/linux/spi/spi.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/spi/spi.h b/include/uapi/linux/spi/spi.h index 236a85f08ded..9d5f58059703 100644 --- a/include/uapi/linux/spi/spi.h +++ b/include/uapi/linux/spi/spi.h @@ -27,6 +27,7 @@ #define SPI_TX_OCTAL _BITUL(13) /* transmit with 8 wires */ #define SPI_RX_OCTAL _BITUL(14) /* receive with 8 wires */ #define SPI_3WIRE_HIZ _BITUL(15) /* high impedance turnaround */ +#define SPI_RX_CPHA_FLIP _BITUL(16) /* flip CPHA on Rx only xfer */ /* * All the bits defined above should be covered by SPI_MODE_USER_MASK. @@ -36,6 +37,6 @@ * These bits must not overlap. A static assert check should make sure of that. * If adding extra bits, make sure to increase the bit index below as well. */ -#define SPI_MODE_USER_MASK (_BITUL(16) - 1) +#define SPI_MODE_USER_MASK (_BITUL(17) - 1) #endif /* _UAPI_SPI_H */ |