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| author | Linus Walleij <linus.walleij@linaro.org> | 2016-06-29 14:08:36 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-06-30 20:40:04 +0100 |
| commit | b1037c1a498f9bb3b5a81c2f243c605c190da754 (patch) | |
| tree | ccc36cf30cb674fec4a40d7261e89e6c9960c3eb /drivers/iio/magnetometer | |
| parent | 9e6c16d98987f6d5df8e59f61b20140d2f1bdcb4 (diff) | |
| download | linux-b1037c1a498f9bb3b5a81c2f243c605c190da754.tar.bz2 | |
iio: magn: ak8975: allow a delay after enabling regulators
The datasheet actually specifies that we need to wait atleast
500us after powering on the device before trying to set mode.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/magnetometer')
| -rw-r--r-- | drivers/iio/magnetometer/ak8975.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c index 6915bd116e49..bf3ffc4ae5c7 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -399,6 +399,12 @@ static int ak8975_power_on(const struct ak8975_data *data) "Failed to enable specified Vid supply\n"); return ret; } + /* + * According to the datasheet the power supply rise time i 200us + * and the minimum wait time before mode setting is 100us, in + * total 300 us. Add some margin and say minimum 500us here. + */ + usleep_range(500, 1000); return 0; } |