diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/dw_spi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c index 3853df5db05..e434320fded 100644 --- a/drivers/spi/dw_spi.c +++ b/drivers/spi/dw_spi.c @@ -537,6 +537,22 @@ static void pump_transfers(unsigned long data) } message->state = RUNNING_STATE; + /* + * Adjust transfer mode if necessary. Requires platform dependent + * chipselect mechanism. + */ + if (dws->cs_control) { + if (dws->rx && dws->tx) + chip->tmode = 0x00; + else if (dws->rx) + chip->tmode = 0x02; + else + chip->tmode = 0x01; + + cr0 &= ~(0x3 << SPI_MODE_OFFSET); + cr0 |= (chip->tmode << SPI_TMOD_OFFSET); + } + /* Check if current transfer is a DMA transaction */ dws->dma_mapped = map_dma_buffers(dws); |