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

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Date:	Tue, 15 Jul 2014 16:16:59 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Jan Kardell <jan.kardell@...liq.com>,
	Zubair Lutfullah <zubair.lutfullah@...il.com>,
	Jonathan Cameron <jic23@...nel.org>
Subject: [PATCH 3.14 05/66] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

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

------------------

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

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@...liq.com>
Tested-by: Zubair Lutfullah <zubair.lutfullah@...il.com>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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


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