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    SubjectRe: [spi-devel-general] [Patch] Add spi full duplex mode transfer support
    Date
    On Tuesday 29 August 2006 9:40 pm, Luke Yang wrote:
    > Hi all,
    >
    > To enable full duplex mode spi transfer in Blackfin spi master
    > driver, I need an extra field in spi_transfer structure. Attached the
    > right format patch.

    I don't understand. ** ALL ** SPI transfers are full duplex.
    If you want half duplex, just don't provide the buffer for the
    transfer going in that direction (RX or TX).

    Rejected ...


    > Signed-off-by: Luke Yang <luke.adi@gmail.com>
    >
    > spi.h | 1 +
    > 1 files changed, 1 insertion(+)
    >
    > diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
    > index c8bb680..99816eb 100644
    > --- a/include/linux/spi/spi.h
    > +++ b/include/linux/spi/spi.h
    > @@ -331,6 +331,7 @@ struct spi_transfer {
    > dma_addr_t rx_dma;
    >
    > unsigned cs_change:1;
    > + unsigned is_duplex:1;
    > u8 bits_per_word;
    > u16 delay_usecs;
    > u32 speed_hz;
    >
    > --
    > Best regards,
    > Luke Yang
    > luke.adi@gmail.com
    >
    -
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