iio: adc: vf610_adc: Fix VALT selection value for REFSEL bits

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>

diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
index 228a003adeed222ee45e9d8823afaf04edb8bfe7..d1bde6d2721ee1137f3bdf1c9d656b93d10b0905 100644 (file)
--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -77,7 +77,7 @@
 #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