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


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