linux-kernel - [PATCH 54/94] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

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Date:	Tue, 15 Jul 2014 20:01:09 +0300
From:	Sam Asadi <asadi.samuel@...il.com>
To:	gregkh@...uxfoundation.org
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Jan Kardell <jan.kardell@...liq.com>,
	Jonathan Cameron <jic23@...nel.org>, stable@...r.kernel.org,
	sam-the-6 <asadi.samuel@...il.com>
Subject: [PATCH 54/94] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

From: Jan Kardell <jan.kardell@...liq.com>

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@...liq.com>
Tested-by: Zubair Lutfullah <zubair.lutfullah@...il.com>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Cc: stable@...r.kernel.org
Signed-off-by: sam-the-6 <asadi.samuel@...il.com>
---
 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 a4db302..d5dc4c6 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -374,7 +374,7 @@ static int tiadc_read_raw(struct iio_dev *indio_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
-- 
1.7.10.4

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