diff options
Diffstat (limited to 'drivers/spi/spi_bfin5xx.c')
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index ab483a0ec6d0..d3da41d3f92d 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -504,6 +504,15 @@ static irqreturn_t bfin_spi_dma_irq_handler(int irq, void *dev_id) "in dma_irq_handler dmastat:0x%x spistat:0x%x\n", dmastat, spistat); + if (drv_data->rx != NULL) { + u16 cr = read_CTRL(drv_data); + /* discard old RX data and clear RXS */ + bfin_spi_dummy_read(drv_data); + write_CTRL(drv_data, cr & ~BIT_CTL_ENABLE); /* Disable SPI */ + write_CTRL(drv_data, cr & ~BIT_CTL_TIMOD); /* Restore State */ + write_STAT(drv_data, BIT_STAT_CLR); /* Clear Status */ + } + clear_dma_irqstat(drv_data->dma_channel); /* |