On Mon, Jun 15, 2020 at 06:51:11AM -0400, Kevin P. Fleming wrote: > Add a property to allow control of the autocalibration filter > capacitor. > > Signed-off-by: Kevin P. Fleming <kevin+linux@xxxxxxx> > Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx> > Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> > Cc: Rob Herring <robh+dt@xxxxxxxxxx> > To: linux-rtc@xxxxxxxxxxxxxxx > To: devicetree@xxxxxxxxxxxxxxx > --- > v3: corrected whitespace > Documentation/devicetree/bindings/rtc/abracon,abx80x.txt | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/Documentation/devicetree/bindings/rtc/abracon,abx80x.txt b/Documentation/devicetree/bindings/rtc/abracon,abx80x.txt > index 2405e35a1bc0f..1b606e33d1a83 100644 > --- a/Documentation/devicetree/bindings/rtc/abracon,abx80x.txt > +++ b/Documentation/devicetree/bindings/rtc/abracon,abx80x.txt > @@ -29,3 +29,11 @@ and valid to enable charging: > - "abracon,tc-diode": should be "standard" (0.6V) or "schottky" (0.3V) > - "abracon,tc-resistor": should be <0>, <3>, <6> or <11>. 0 disables the output > resistor, the other values are in kOhm. > + > +All of the devices can have a 47pf capacitor attached to increase the > +autocalibration accuracy of their RC oscillators. To enable or disable usage > +of the capacitor the following property can be defined: > + > + - "abracon,autocal-filter": should be <0> or <1>. 0 indicates that there > + is no capacitor attached, 1 indicates that there > + is a capacitor attached. What does not present mean? If you don't have a defined meaning (such as maintain the default/bootloader initialized setting), then make this boolean. Rob
