Harald Geyer <harald@xxxxxxxxx> wrote: >> > I'm working on a iio driver for the DHT11 (and DHT22) >> > humidity and temperature sensor. I believe this is the >> > first humidity sensor to be supported by the iio framework. >> Sure, previously these have been considered acceptable to hwmon >> (just about ;). That has always been controversial and with >> iio-hwmon in place, I doubt anyone will mind having it new >> ones in IIO. I've cc'd a few people just in case they have >> strong views on this. > >Thanks for the pointer. Obviously I should have researched that >better. > >I didn't look into this in detail yet, but porting the driver to >hwmon probably isn't much more work than adding humidity >support to IIO. Which way do you prefer? I don't really mind but as they have been controversial in hwmon perhaps iio is a better bet. > >> > This poses the question how the iio API regarding humidity >> > values should be extended. >> > >> > 1) Which string to use to construct filenames in sysfs, etc.: >> > My suggestion: "relhum" >> I wonder if humidtyrelative would be better (just in case someone >> produces a sensor to measure specific or absolute humidity as then >> they will be close together in names. Also it's rarely worth >> abreviating these terms as it can only cause confusion at a later >> date and only costs a few characters here and there. > >hwmon is using "humidity" it seems. Now I'm torn between using >the same and "humidityrelative" ;) We have broken fairly thoroughly from hwmon on type naming already so don't worry about doing so again. > >> > 2) What unit to use for values: >> > My suggestion: permil (0.1%) >> hmm.. Interesting question for a ratio quantity. Perhaps a >> decimal ratio might work? so 0.1% = 0.0001? >> Don't really have strong feelings but permil whilst common >> in some fields is a little unusual. > >hwmon is using milli per cent units. I suggest following >that precedent. Fair enough. > >> > I'll submit a formal patch for the DHT11 driver when the >> > iio framework is ready, but if you want to have a look at >> > the work in progress, you find it at >> > http://www.unet.univie.ac.at/~a0300802/files/dht11-gpio.c >> > and at the bottom of this mail. > >[...] > >> Have had a very quick look at the driver and looks fine in general. >> Will do a full review once it is complete. > >Thanks for the feedback. > >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 -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. -- 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
