On 26/04/17 10:01, Mika Westerberg wrote: > On Tue, Apr 25, 2017 at 06:12:12PM +0200, Jan Kiszka wrote: >> Now, do you also a suggestion where to put that 5 V reference voltage >> value that is hard-coded (via wiring) on the target boards for the ADC? >> That is now device-specific, not a controller parameter. Is there an >> ACPI-way to express such a parameter? > > You may put it into device property using _DSD (as long as you don't try > to represent regulators or so). > >> How would that be done for DTs? > > I don't know but you may look under Documentation/devicetree/bindings if > there is anything. Under DT it would be done using a fixed voltage regulator. > >> Plan B would be hard-coding in the code for now, waiting for a second, >> non-ACPI user to address it. > > Sounds reasonable. Somewhat of a pain to basically use a random value as the default going forward. Presumably this isn't the first ever ACPI table to need to tell use about a reference voltage...
Mark, seen anything similar? I see https://www.kernel.org/doc/Documentation/arm64/arm-acpi.txt suggests that mapping to regulators isn't expected to ever happen... Jonathan > -- > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html >
