On Fri, Oct 22, 2010 at 02:01:48AM -0400, Mike Frysinger wrote:
> From: Michael Hennerich <[email protected]>
>
> The error interrupt on the BF537 SIC cannot be enabled on a
> per-peripheral basis. Once the error interrupt is enabled
> for one peripheral, it is automatically enabled for all.
>
> So in the Blackfin on-chip SPI driver, we need to clear out
> these known errors in the data interrupt once we've successfully
> finished processing all of the pending data.
>
> Signed-off-by: Michael Hennerich <[email protected]>
> Signed-off-by: Mike Frysinger <[email protected]>
> ---
merged, thanks.
g.
> 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 a8f276d..3f22351 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);
>
> /*
> --
> 1.7.3.1
>
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