Am 19.10.2015 um 13:57 schrieb Lars-Peter Clausen <lars@xxxxxxxxxx>: > On 10/16/2015 02:53 PM, H. Nikolaus Schaller wrote: > [...] >> +Optional sub-nodes: >> +ti,channel0-current-microamp: Channel 0 current in uA. >> + Values are rounded to derive 0uA, 5uA, 15uA, 20uA. >> +ti,channel3-current-microamp: Channel 3 current in uA. >> + Valid are rounded to derive 0uA, 10uA, 400uA, 800uA. >> +ti,enable-extended-delay: Enable extended delay. > > Those three above sound more like configuration policy, rather than hardware > description. What influence which values should be chosen? e.g. the nominal value of the NTC that can be connected if the Palmas is hooked up in a standard way. If a board has no NTC and uses channel0 for a different purpose one should choose 0uA. If it is let's say 10kOhm it should probably be 20uA to give a nominal voltage reading of 200mV. 100kOhm will give 2V which is at the limit of the ADC input range and therefore it would be better to choose 15uA or 5uA. I think choosing extended delay depends on the noisiness of the input signal but I am not a specialist for this feature. So I would say the board hardware mandates some specific value. BR, Nikolaus -- 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
