From: Russ Dill <Russ.Dill@xxxxxx>
While not pulling out samples, the FIFO will fill up causing an
overrun event. Before starting up another continuous sample, clear that
event.
Signed-off-by: Russ Dill <Russ.Dill@xxxxxx>
Signed-off-by: Zubair Lutfullah <zubair.lutfullah@xxxxxxxxx>
---
drivers/iio/adc/ti_am335x_adc.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 265ed27..00fdb22 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -241,22 +241,23 @@ static int tiadc_buffer_postenable(struct iio_dev *idev)
{
struct tiadc_device *adc_dev = iio_priv(idev);
struct iio_buffer *buffer = idev->buffer;
- unsigned int enb, fifo1count;
- int stepnum, i;
+ unsigned int enb, config;
+ int stepnum;
u8 bit;
if (!adc_dev->is_continuous_mode) {
pr_info("Data cannot be read continuously in one shot mode\n");
return -EINVAL;
} else {
- tiadc_writel(adc_dev, REG_IRQENABLE,
- (IRQENB_FIFO1THRES |
- IRQENB_FIFO1OVRRUN |
- IRQENB_FIFO1UNDRFLW));
-
- fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
- for (i = 0; i < fifo1count; i++)
- tiadc_readl(adc_dev, REG_FIFO1);
+ config = tiadc_readl(adc_dev, REG_CTRL);
+ tiadc_writel(adc_dev, REG_CTRL,
+ config & ~CNTRLREG_TSCSSENB);
+ tiadc_writel(adc_dev, REG_CTRL,
+ config | CNTRLREG_TSCSSENB);
+ tiadc_writel(adc_dev, REG_IRQSTATUS, IRQENB_FIFO1THRES
+ | IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW);
+ tiadc_writel(adc_dev, REG_IRQENABLE, IRQENB_FIFO1THRES
+ | IRQENB_FIFO1OVRRUN);
tiadc_writel(adc_dev, REG_SE, 0x00);
for_each_set_bit(bit, buffer->scan_mask,
--
1.7.9.5
--
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