// Write custom SPI message func SPI_IOC_MESSAGE(n uintptr) uintptr { return ioctl.IOW(SPI_IOC_MAGIC, 0, uintptr(SPI_MESSAGE_SIZE(n))) }
// Write SPI device default max speed hz func SPI_IOC_WR_MAX_SPEED_HZ() uintptr { return ioctl.IOW(SPI_IOC_MAGIC, 4, 4) }
// Write SPI bit justification func SPI_IOC_WR_LSB_FIRST() uintptr { return ioctl.IOW(SPI_IOC_MAGIC, 2, 1) }
// Write SPI device word length (1..N) func SPI_IOC_WR_BITS_PER_WORD() uintptr { return ioctl.IOW(SPI_IOC_MAGIC, 3, 1) }
// Write of SPI mode (SPI_MODE_0..SPI_MODE_3) func SPI_IOC_WR_MODE() uintptr { return ioctl.IOW(SPI_IOC_MAGIC, 1, 1) }