| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 013/128] iio: adc: xilinx: Fix VREFN scale | Date | Wed, 16 Dec 2015 09:37:33 -0800 |
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3.19.8-ckt12 -stable review patch. If anyone has any objections, please let me know.
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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: Kamal Mostafa <kamal@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 ce93bd8..95c0b3d 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: -- 1.9.1
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