Hi, a few month ago I submitted a driver vor DHT11 and DHT22 humidity sensors. Alas at least DHT22 seems to have hardware issues: After a few days of operation (reading the sensor once per minute) the sensor seems to stop responding entirely and the only way to fix this is to power cycle the sensor. I have tried 3.3 V and 5 V supply and have observed this on at least two pieces of hardware, so I'm pretty confident the issue is real. The obvious solution is to use an additional gpio line to control power for the sensor. Now I'm torn whether to handle this in kernel space or user space: Since software using the sysfs ABI doesn't even know (and shouldn't need to know) that the humidity values come from a DHT22, this clearly should be handled be the kernel driver. OTOH there probably is an infinite number of algorithms (and HW configurations) people might want to use to control power and coming up with an ABI that allows implementing any of them, will be a challange. Any guidance is appreciated. TIA, Harald -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
