diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-11-09 14:36:45 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-09 16:42:17 +0000 |
| commit | e6811d1d7a6a38ee637fe219c3b67dbfe17e8b3f (patch) | |
| tree | c85ec0d0bd6f8475ffb6e7134d038fcc00eb4d0b /drivers/spi/spi.c | |
| parent | dc4dc36056392c0b0b1ca9e81bebff964b9297e0 (diff) | |
spi: make sure all transfer has bits_per_word set
When spi client does the spi transfer and does not sets
the bits_per_word for each transfer then set it as default
of spi device in spi core before calling low level transfer.
Removing the similar code from spi-tegra20-slink driver as
it is not required.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 84c2861d6f4..518e5955664 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1190,6 +1190,7 @@ EXPORT_SYMBOL_GPL(spi_setup); static int __spi_async(struct spi_device *spi, struct spi_message *message) { struct spi_master *master = spi->master; + struct spi_transfer *xfer; /* Half-duplex links include original MicroWire, and ones with * only one data pin like SPI_3WIRE (switches direction) or where @@ -1198,7 +1199,6 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) */ if ((master->flags & SPI_MASTER_HALF_DUPLEX) || (spi->mode & SPI_3WIRE)) { - struct spi_transfer *xfer; unsigned flags = master->flags; list_for_each_entry(xfer, &message->transfers, transfer_list) { @@ -1211,6 +1211,15 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) } } + /** + * Set transfer bits_per_word as spi device default if it is not + * set for this transfer. + */ + list_for_each_entry(xfer, &message->transfers, transfer_list) { + if (!xfer->bits_per_word) + xfer->bits_per_word = spi->bits_per_word; + } + message->spi = spi; message->status = -EINPROGRESS; return master->transfer(spi, message); |