[PATCH 3.15 05/84] iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends

Greg Kroah-Hartman
2014-07-15T23:38:20Z

From: Jan Kardell <jan.kardell@telliq.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@telliq.com>
Tested-by: Zubair Lutfullah <zubair.lutfullah@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
@@ -374,7 +374,7 @@ 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