On 27/04/17 07:01, Jonathan Cameron wrote: > 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. Though having actually looked at the driver, you presumably already know this given you are requesting an appropriate 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 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
