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| author | Slaveyko Slaveykov <sis@melexis.com> | 2020-12-16 12:57:20 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-01-14 21:56:55 +0100 |
| commit | cf5b1385d748b2f91b0c05bb301fcaf9bdbad385 (patch) | |
| tree | f48907978361d1ef719196deb3989bdf1c5d68b9 /drivers/iio | |
| parent | iio: adc: ti_am335x_adc: remove omitted iio_kfifo_free() (diff) | |
| download | linux-cf5b1385d748b2f91b0c05bb301fcaf9bdbad385.tar.xz linux-cf5b1385d748b2f91b0c05bb301fcaf9bdbad385.zip | |
drivers: iio: temperature: Add delay after the addressed reset command in mlx90632.c
After an I2C reset command, the mlx90632 needs some time before
responding to other I2C commands. Without that delay, there is a chance
that the I2C command(s) after the reset will not be accepted.
Signed-off-by: Slaveyko Slaveykov <sis@melexis.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Crt Mori <cmo@melexis.com>
Fixes: e02472f74a81 ("iio:temperature:mlx90632: Adding extended calibration option")
Link: https://lore.kernel.org/r/20201216115720.12404-2-sis@melexis.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/temperature/mlx90632.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c index 503fe54a0bb9..608ccb1d8bc8 100644 --- a/drivers/iio/temperature/mlx90632.c +++ b/drivers/iio/temperature/mlx90632.c @@ -248,6 +248,12 @@ static int mlx90632_set_meas_type(struct regmap *regmap, u8 type) if (ret < 0) return ret; + /* + * Give the mlx90632 some time to reset properly before sending a new I2C command + * if this is not done, the following I2C command(s) will not be accepted. + */ + usleep_range(150, 200); + ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, (MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK), (MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT)); |