Hi Jacopo,
On Wed, Dec 7, 2016 at 9:29 AM, jacopo@xxxxxxxxxx <jacopo@xxxxxxxxxx> wrote:
> On 06/12/2016 22:00, Peter Meerwald-Stadler wrote:
>> On Tue, 6 Dec 2016, Jacopo Mondi wrote:
>>> Add IIO driver for Maxim MAX11100 single-channel ADC.
>>> Support raw_read mode only.
>>
>> the read_raw() is supposed to return millivolts (after application of
>> offset and scale); maybe need _SCALE?
>
> How can I return millivolts here? They vary in function of the supplied Vref
> as ( V = val * Vref / (2 ^ 16 - 1)) where "val" is digital value output by
> the ADC.
> Since Vref can range from 3.8V to 5.25V, while it's typically 4.096V, isn't
> it more appropriate to let userspace perform conversion to millivolts, as it
> knows what Vref value is supplied to the ADC?
Specify Vref in DT?
Which finally gives a good reason to add a DT binding document for
MAX11100 ;-)
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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