iio: accel: mma8452: ignore the return value of reset operation

commit bf745142cc0a3e1723f9207fb0c073c88464b7b4 upstream.

On fxls8471, after set the reset bit, the device will reset immediately,
will not give ACK. So ignore the return value of this reset operation,
let the following code logic to check whether the reset operation works.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Fixes: ecabae713196 ("iio: mma8452: Initialise before activating")
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/1655292718-14287-1-git-send-email-haibo.chen@nxp.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 67463be797def1a843ae45839e64c3b9cd49d3f5..b12e804647063530216e4f793bf48dc9faa7d8b5 100644 (file)
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1496,10 +1496,14 @@ static int mma8452_reset(struct i2c_client *client)
        int i;
        int ret;
 
-       ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2,
+       /*
+        * Find on fxls8471, after config reset bit, it reset immediately,
+        * and will not give ACK, so here do not check the return value.
+        * The following code will read the reset register, and check whether
+        * this reset works.
+        */
+       i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2,
                                        MMA8452_CTRL_REG2_RST);
-       if (ret < 0)
-               return ret;
 
        for (i = 0; i < 10; i++) {
                usleep_range(100, 200);