[PATCH 3.12 131/170] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

Jiri Slaby
2014-07-18T13:34:26Z

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

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 <jan.kardell@telliq.com>
Tested-by: Zubair Lutfullah <zubair.lutfullah@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
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,
--
2.0.0