Clear the A/D FIFO as part of the analog input (*cancel) to help with
cleaning up the async command.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/rtd520.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/staging/comedi/drivers/rtd520.c
b/drivers/staging/comedi/drivers/rtd520.c
index 7d4cb14..7d04a7e 100644
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -1083,6 +1083,7 @@ static int rtd_ai_cancel(struct comedi_device *dev,
struct comedi_subdevice *s)
devpriv->ai_count = 0; /* stop and don't transfer any more */
status = readw(dev->mmio + LAS0_IT);
overrun = readl(dev->mmio + LAS0_OVERRUN) & 0xffff;
+ writel(0, dev->mmio + LAS0_ADC_FIFO_CLEAR);
return 0;
}
--
2.0.3
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