If the chip was in shutdown mode when the driver was loaded, the first
conversion is ready no more than 35 milli-seconds after the chip was
taken out of shutdown. The driver delay was so far set to 333 ms (HZ / 3),
which is much higher than the maximum time needed by the chip.
Reduce the time to 35 milli-seconds.
Introduce a 'valid' flag to ensure that sensor data is actually read
even if requested less than 333 ms after the driver was loaded.
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v3: Don't go to sleep if sensor readings are not available;
instead, return -EAGAIN (matching previous behavior)
tmp102_update_device() is now a void function.
v2: No change
Note: This series depends on the following two patches in -next.