iio: accel: adxl372: Perform a reset at start up

We need to perform a reset a start up to make sure that the chip is in a
consistent state. This reset also disables all the interrupts which
should only be enabled together with the iio buffer. Not doing this, was
sometimes causing unwanted interrupts to trigger.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Fixes: f4f55ce38e5f ("iio:adxl372: Add FIFO and interrupts support")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index fbad4b45fe42d2d9bcf71c6e54ca1a6de06bfc9d..67b8817995c047b791c638da6e1131f9f967f222 100644 (file)
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -575,6 +575,14 @@ static int adxl372_setup(struct adxl372_state *st)
                return -ENODEV;
        }
 
+       /*
+        * Perform a software reset to make sure the device is in a consistent
+        * state after start up.
+        */
+       ret = regmap_write(st->regmap, ADXL372_RESET, ADXL372_RESET_CODE);
+       if (ret < 0)
+               return ret;
+
        ret = adxl372_set_op_mode(st, ADXL372_STANDBY);
        if (ret < 0)
                return ret;