SPI_CONTROLLER_HALF_DUPLEX 360 drivers/spi/spi-mt7621.c master->flags = SPI_CONTROLLER_HALF_DUPLEX; SPI_CONTROLLER_HALF_DUPLEX 3173 drivers/spi/spi.c if ((ctlr->flags & SPI_CONTROLLER_HALF_DUPLEX) || SPI_CONTROLLER_HALF_DUPLEX 1401 include/linux/spi/spi.h #define SPI_MASTER_HALF_DUPLEX SPI_CONTROLLER_HALF_DUPLEX