Messages in this thread | | | From | David Brownell <> | Subject | Re: [PATCH] [drivers] [SPI] SPI_GPIO: add support for controllers without MISO or MOSI pin | Date | Tue, 30 Jun 2009 18:39:13 -0700 |
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On Thursday 25 June 2009, Marek Szyprowski wrote: > --- a/drivers/spi/spi_bitbang.c > +++ b/drivers/spi/spi_bitbang.c > @@ -392,6 +392,22 @@ int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m) > unsigned long flags; > int status = 0; > > + if (spi->master->flags & SPI_MASTER_NO_RX) { > + struct spi_transfer *xfer; > + list_for_each_entry(xfer, &m->transfers, transfer_list) { > + if (xfer->rx_buf) > + return -EINVAL; > + } > + }
Actually these two loops should merge, and likely move with spi_async() into the spi.c core code ... I'll split this support into a separate patch.
> + > + if (spi->master->flags & SPI_MASTER_NO_TX) { > + struct spi_transfer *xfer; > + list_for_each_entry(xfer, &m->transfers, transfer_list) { > + if (xfer->tx_buf) > + return -EINVAL; > + } > + } > + > m->actual_length = 0; > m->status = -EINPROGRESS; >
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