iio: adc: max11410: fix incomplete vref buffer mask

VREFP bit was missing from channel configuration mask and VREFN bit was
included twice instead which fails to enable positive reference buffer when
requested by a channel. Channels that don't enable vrefp buffer were not
affected.

Fixes: a44ef7c46097 ("iio: adc: add max11410 adc driver")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Ibrahim Tilki <Ibrahim.Tilki@analog.com>
Link: https://lore.kernel.org/r/20221122114718.17557-1-Ibrahim.Tilki@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/max11410.c b/drivers/iio/adc/max11410.c
index 8cd5663671874cf91b82790ad0ee8edb39f9422b..fdc9f03135b54e65f26d4135920bbd04d239637a 100644 (file)
--- a/drivers/iio/adc/max11410.c
+++ b/drivers/iio/adc/max11410.c
@@ -370,7 +370,7 @@ static int max11410_configure_channel(struct max11410_state *st,
                 FIELD_PREP(MAX11410_CTRL_UNIPOLAR_BIT, cfg.bipolar ? 0 : 1);
        ret = regmap_update_bits(st->regmap, MAX11410_REG_CTRL,
                                 MAX11410_CTRL_REFSEL_MASK |
-                                MAX11410_CTRL_VREFN_BUF_BIT |
+                                MAX11410_CTRL_VREFP_BUF_BIT |
                                 MAX11410_CTRL_VREFN_BUF_BIT |
                                 MAX11410_CTRL_UNIPOLAR_BIT, regval);
        if (ret)