On Wed, Oct 13, 2010 at 05:51:02PM +0200, Matthias Brugger wrote:
> - bits_per_word option in spi_transfer are allowed if it does not change
> the csr register.
>
> This is necessary for the driver in
> drivers/staging/iio/adis16260_core.c, as it uses this option.
>
> Signed-off-by: Matthias Brugger <[email protected]>
Applied, thanks.
However, the patch is line-wrap damaged and I needed to fix it up by
hand. Please check your email client configuration.
g.
> ---
> drivers/spi/atmel_spi.c | 14 +++++++++++++-
> 1 files changed, 13 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
> index c4e0442..5c03a5b 100644
> --- a/drivers/spi/atmel_spi.c
> +++ b/drivers/spi/atmel_spi.c
> @@ -654,6 +654,8 @@ static int atmel_spi_transfer(struct spi_device
> *spi, struct spi_message *msg)
> struct spi_transfer *xfer;
> unsigned long flags;
> struct device *controller = spi->master->dev.parent;
> + u8 bits;
> + struct atmel_spi_device *asd;
>
> as = spi_master_get_devdata(spi->master);
>
> @@ -672,8 +674,18 @@ static int atmel_spi_transfer(struct spi_device
> *spi, struct spi_message *msg)
> return -EINVAL;
> }
>
> + if (xfer->bits_per_word) {
> + asd = spi->controller_state;
> + bits = (asd->csr >> 4) & 0xf;
> + if (bits != xfer->bits_per_word - 8) {
> + dev_dbg(&spi->dev, "you can't yet change "
> + "bit_per_word in transfers\n");
> + return -ENOPROTOOPT;
> + }
> + }
> +
> /* FIXME implement these protocol options!! */
> - if (xfer->bits_per_word || xfer->speed_hz) {
> + if (xfer->speed_hz) {
> dev_dbg(&spi->dev, "no protocol options yet\n");
> return -ENOPROTOOPT;
> }
> --
> 1.5.6.5
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