On Wed, Dec 09, 2015 at 10:24:37PM -0800, Andrey Smirnov wrote: > On Tue, Dec 8, 2015 at 1:05 AM, Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote: > > The following is something like a mixture of Linux IIO and hwmon support > > for the poor. I called it iodevice, but better names are appreciated. > > A iodevice has multiple channels, each providing a value like for > > example a temperature or a voltage. For each iodevice we provide device > > parameters to access the values from the commandline. The C API for a > > consumer consists of iochannel_get() to get a iochannel, and > > iochannel_get_value() to actually read a value. > > As drivers we currently have a LM75 temperature driver and a MCP342x ADC > > driver. Also there is a PT100 driver which itself is a consumer of > > another iodevice, a MCP342x in my case. This is more meant as an example > > since the voltage to temperature conversion function is board specific. > > > One feature that I would like to suggest/request in this API is > ability to give custom names to individual channels via DT. AFAIU, as > of right now, that the names are hard coded and assigned automatically > by the subsystem. > > The reason why I am asking is because a fair number of use-cases for > Barebox that I see is as a board verification tool and as such it is > often used by people who may not be as familiar (if at all) with > Barebox, it's code and how "in_value%d_%s" relates to the actual > parameter reading they are trying to verify. Note the device name is already configurable in device tree using aliases, Adding an foo_temperature = &lm75 will result in the device being named foo_temperature, so echo $foo_temperature.in_value0_mC will give you the temperature. Ok, that alone doesn't solve the problem. We still can only name devices and not individual channels. I'm just thinking about registering a single device named 'sensors' or similar and register all parameters under that device instead of their individual devices. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
