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Date:	Fri, 18 Jul 2014 14:12:16 +0200
From:	Jiri Slaby <>
Cc:, Jan Kardell <>,
	Jonathan Cameron <>,
	Jiri Slaby <>
Subject: [PATCH 3.12 131/170] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

From: Jan Kardell <>

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


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 <>
Tested-by: Zubair Lutfullah <>
Signed-off-by: Jonathan Cameron <>
Signed-off-by: Jiri Slaby <>
 drivers/iio/adc/ti_am335x_adc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index a952538a1a8b..b9ed661293a7 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -155,7 +155,7 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
 		if (time_after(jiffies, timeout))
 			return -EAGAIN;
-	map_val = chan->channel + TOTAL_CHANNELS;
+	map_val = adc_dev->channel_step[chan->scan_index];
 	 * When the sub-system is first enabled,

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