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 1ef75c94987bda3c8e90ceb775c34c196e9db02c..b03c6d9553ae5099cabfd5e90f9f63c7ca673388 100644 (file)
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1486,10 +1486,14 @@ 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);