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[PATCH 3.18 13/16] iio: adc: vf610_adc: Fix VALT selection value for REFSEL bits

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

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

From: Stefan-Gabriel Mirea <stefan-gabriel.mirea@nxp.com>

commit d466d3c1217406b14b834335b5b4b33c0d45bd09 upstream.

In order to select the alternate voltage reference pair (VALTH/VALTL), the
right value for the REFSEL field in the ADCx_CFG register is "01", leading
to 0x800 as register mask. See section 8.2.6.4 in the reference manual[1].

[1] http://www.nxp.com/docs/en/reference-manual/VFXXXRM.pdf

Fixes: a775427632fd ("iio:adc:imx: add Freescale Vybrid vf610 adc driver")
Signed-off-by: Stefan-Gabriel Mirea <stefan-gabriel.mirea@nxp.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/adc/vf610_adc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -71,7 +71,7 @@
 #define VF610_ADC_ADSTS_MASK		0x300
 #define VF610_ADC_ADLPC_EN		0x80
 #define VF610_ADC_ADHSC_EN		0x400
-#define VF610_ADC_REFSEL_VALT		0x100
+#define VF610_ADC_REFSEL_VALT		0x800
 #define VF610_ADC_REFSEL_VBG		0x1000
 #define VF610_ADC_ADTRG_HARD		0x2000
 #define VF610_ADC_AVGS_8		0x4000

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[PATCH 3.18 00/16] 3.18.66-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 03:20 +0200
  [PATCH 3.18 01/16] mm: ratelimit PFNs busy info message Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 03:20 +0200
  [PATCH 3.18 11/16] usb: quirks: Add no-lpm quirk for Moshi USB to Ethernet Adapter Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 06/16] USB: hcd: Mark secondary HCD as dead if the primary one died Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 08/16] iio: light: tsl2563: use correct event code Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 05/16] usb: musb: fix tx fifo flush handling again Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 14/16] pnfs/blocklayout: require 64-bit sector_t Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 03/16] USB: serial: option: add D-Link DWM-222 device ID Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 07/16] staging:iio:resolver:ad2s1210 fix negative IIO_ANGL_VEL read Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 15/16] pinctrl: sunxi: add a missing function of A10/A20 pinctrl driver Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 10/16] USB: Check for dropped connection before switching to full speed Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 04/16] USB: serial: cp210x: add support for Qivicon USB ZigBee dongle Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 16/16] pinctrl: samsung: Remove bogus irq_[un]mask from resource management Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 12/16] usb:xhci:Add quirk for Certain failing HP keyboard on reset after resume Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:10 +0200
  [PATCH 3.18 02/16] fuse: initialize the flock flag in fuse_file on allocation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:10 +0200
  [PATCH 3.18 13/16] iio: adc: vf610_adc: Fix VALT selection value for REFSEL bits Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:10 +0200
  Re: [PATCH 3.18 00/16] 3.18.66-stable review Guenter Roeck <linux@roeck-us.net> - 2017-08-15 12:50 +0200
  Re: [PATCH 3.18 00/16] 3.18.66-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-08-15 20:10 +0200

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