Import the flags supported by the Linux spi controller implementation to make it easier to port driver from Linux.
Signed-off-by: Marco Felsch <[email protected]> --- Changelog: v2: - no changes include/spi/spi.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/spi/spi.h b/include/spi/spi.h index 8458d890f4e6..a8bbf55e0a5a 100644 --- a/include/spi/spi.h +++ b/include/spi/spi.h @@ -173,6 +173,7 @@ static inline void spi_set_ctldata(struct spi_device *spi, void *state) * unsupported bits_per_word. If not set, this value is simply ignored, * and it's up to the individual driver to perform any validation. * @max_speed_hz: Highest supported transfer speed + * @flags: other constraints relevant to this driver * @setup: updates the device mode and clocking records used by a * device's SPI controller; protocol code may call this. This * must fail if an unrecognized or unsupported mode is requested. @@ -235,6 +236,16 @@ struct spi_controller { /* limits on transfer speed */ u32 max_speed_hz; + /* Other constraints relevant to this driver */ + u16 flags; +#define SPI_CONTROLLER_HALF_DUPLEX BIT(0) /* Can't do full duplex */ +#define SPI_CONTROLLER_NO_RX BIT(1) /* Can't do buffer read */ +#define SPI_CONTROLLER_NO_TX BIT(2) /* Can't do buffer write */ +#define SPI_CONTROLLER_MUST_RX BIT(3) /* Requires rx */ +#define SPI_CONTROLLER_MUST_TX BIT(4) /* Requires tx */ +#define SPI_CONTROLLER_GPIO_SS BIT(5) /* GPIO CS must select slave */ +#define SPI_CONTROLLER_SUSPENDED BIT(6) /* Currently suspended */ + /* setup mode and clock, etc (spi driver may call many times) */ int (*setup)(struct spi_device *spi); -- 2.39.5
