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Subject[PATCH 5.3 061/112] iio: accel: adxl372: Perform a reset at start up
Date
From: Stefan Popa <stefan.popa@analog.com>

commit d9a997bd4d762d5bd8cc548d762902f58b5e0a74 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/iio/accel/adxl372.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -575,6 +575,14 @@ static int adxl372_setup(struct adxl372_
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;

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