From: Haibo Chen haibo.chen@nxp.com
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.c... 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/mma8452.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -1493,10 +1493,14 @@ static int mma8452_reset(struct i2c_clie 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);