linux-kernel - [PATCH 4.0 038/148] iio: adc: xilinx: Fix VREFP scale

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Message-Id: <20150603114207.006116060@linuxfoundation.org>
Date:	Wed,  3 Jun 2015 21:08:28 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Thomas Betker <thomas.betker@...de-schwarz.com>,
	Jonathan Cameron <jic23@...nel.org>
Subject: [PATCH 4.0 038/148] iio: adc: xilinx: Fix VREFP scale

4.0-stable review patch.  If anyone has any objections, please let me know.

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

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

commit 00db4e52f4541965f7fda225eb458a75f892017b upstream.

The scaling factor for VREFP is 3.0/4096, not 1.0/4096; fix this to get
correct readings.

Signed-off-by: Thomas Betker <thomas.betker@...de-schwarz.com>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iio/adc/xilinx-xadc-core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -856,6 +856,7 @@ static int xadc_read_raw(struct iio_dev
 			switch (chan->address) {
 			case XADC_REG_VCCINT:
 			case XADC_REG_VCCAUX:
+			case XADC_REG_VREFP:
 			case XADC_REG_VCCBRAM:
 			case XADC_REG_VCCPINT:
 			case XADC_REG_VCCPAUX:


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