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| -rw-r--r-- | include/spi.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/spi.h b/include/spi.h index 852f570eaa8..2b4929fc79d 100644 --- a/include/spi.h +++ b/include/spi.h @@ -67,6 +67,39 @@ struct dm_spi_slave_platdata { #endif /* CONFIG_DM_SPI */ /** + * enum spi_clock_phase - indicates the clock phase to use for SPI (CPHA) + * + * @SPI_CLOCK_PHASE_FIRST: Data sampled on the first phase + * @SPI_CLOCK_PHASE_SECOND: Data sampled on the second phase + */ +enum spi_clock_phase { + SPI_CLOCK_PHASE_FIRST, + SPI_CLOCK_PHASE_SECOND, +}; + +/** + * enum spi_wire_mode - indicates the number of wires used for SPI + * + * @SPI_4_WIRE_MODE: Normal bidirectional mode with MOSI and MISO + * @SPI_3_WIRE_MODE: Unidirectional version with a single data line SISO + */ +enum spi_wire_mode { + SPI_4_WIRE_MODE, + SPI_3_WIRE_MODE, +}; + +/** + * enum spi_polarity - indicates the polarity of the SPI bus (CPOL) + * + * @SPI_POLARITY_LOW: Clock is low in idle state + * @SPI_POLARITY_HIGH: Clock is high in idle state + */ +enum spi_polarity { + SPI_POLARITY_LOW, + SPI_POLARITY_HIGH, +}; + +/** * struct spi_slave - Representation of a SPI slave * * For driver model this is the per-child data used by the SPI bus. It can |