On 24/08/15 19:44, Lars-Peter Clausen wrote: > On 08/24/2015 08:44 AM, Sean Nyekjær wrote: >> Hi Lars-Peter >> >> Sorry the write again. Is the possible with the current iio interface to >> switch a dac from voltage to current mode from userspace? >> If not, will upstream be interrested in a patch if it's possible? > > Hi, > > Currently this does not work. A patch to add support for this is certainly > welcome. I'm just not sure what the interface for this should look like. > Maybe register both a current and a voltage channel and only allow one of > them to be powered at a time. That's certainly my initial thought on an interface as well... The only tricky bit is what a read back of the 'other' channels value should report. Perhaps return -EBUSY? Jonathan > > - Lars > > >> >> Regards >> Sean Nyekjær >> >> On 2015-08-20 11:57, Sean Nyekjær wrote: >>> Hi all >>> >>> I'm in the process of creating a custom BSP with an ad5755 dac. It an >>> requirement to be able to switch between voltage and current mode per >>> channel from userspace. >>> Is it possible with the current iio interface? >>> Is there a feature in the pipeline where it's possible to do this switch? >>> >>> Regards >>> Sean Nyekjær-- >>> 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 >> > > -- > 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 > -- 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
