[PATCH 3.14 05/66] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

From: Greg Kroah-Hartman
Date: Tue Jul 15 2014 - 19:58:05 EST

3.14-stable review patch. If anyone has any objections, please let me know.


From: Jan Kardell <jan.kardell@xxxxxxxxxx>

commit baa3c65298c089a9014b4e523a14ec2885cca1bc upstream.

Since AI lines could be selected at will (linux-3.11) the sending
and receiving ends of the FIFO does not agree about what step is used
for a line. It only works if the last lines are used, like 5,6,7,
and fails if ie 2,4,6 is selected in DT.

Signed-off-by: Jan Kardell <jan.kardell@xxxxxxxxxx>
Tested-by: Zubair Lutfullah <zubair.lutfullah@xxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/iio/adc/ti_am335x_adc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -375,7 +375,7 @@ static int tiadc_read_raw(struct iio_dev
return -EAGAIN;
- map_val = chan->channel + TOTAL_CHANNELS;
+ map_val = adc_dev->channel_step[chan->scan_index];

* We check the complete FIFO. We programmed just one entry but in case

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/