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    Subject[PATCH 3.16.y-ckt 006/126] iio: adc: xilinx: Fix VREFN scale
    Date
    3.16.7-ckt22 -stable review patch.  If anyone has any objections, please let me know.

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

    From: Thomas Betker <thomas.betker@rohde-schwarz.com>

    commit a57f8dac46fbac5ab0e31aef1a98b3f6eb30c079 upstream.

    The scaling factor for VREFN is 3.0/4096 (not 1.0/4096), just as for
    VREFP. This is not immediately obvious from the specification (Xilinx
    UG480), but has been confirmed by Xilinx support.

    Suggested-by: Hartmut Knaack <knaack.h@gmx.de>
    Signed-off-by: Thomas Betker <thomas.betker@rohde-schwarz.com>
    Signed-off-by: Jonathan Cameron <jic23@kernel.org>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    drivers/iio/adc/xilinx-xadc-core.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
    index c7637716fa8f..53c80c73f128 100644
    --- a/drivers/iio/adc/xilinx-xadc-core.c
    +++ b/drivers/iio/adc/xilinx-xadc-core.c
    @@ -857,6 +857,7 @@ static int xadc_read_raw(struct iio_dev *indio_dev,
    case XADC_REG_VCCINT:
    case XADC_REG_VCCAUX:
    case XADC_REG_VREFP:
    + case XADC_REG_VREFN:
    case XADC_REG_VCCBRAM:
    case XADC_REG_VCCPINT:
    case XADC_REG_VCCPAUX:

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