On Tue, 8 Aug 2023 14:32:26 +0200 Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> wrote: > On 08/08/2023 08:25:33-0400, Hugo Villeneuve wrote: > > On Tue, 8 Aug 2023 12:21:24 +0100 > > Conor Dooley <conor@xxxxxxxxxx> wrote: > > > > > Hey Hugo, > > > > > > On Wed, Aug 02, 2023 at 03:11:52PM -0400, Hugo Villeneuve wrote: > > > > From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx> > > > > > > > > These properties can be defined in the board's device tree to set the > > > > default power-on values for battery-related functions. > > > > > > > > Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx> > > > > --- > > > > .../devicetree/bindings/rtc/rtc.yaml | 19 +++++++++++++++++++ > > > > 1 file changed, 19 insertions(+) > > > > > > > > diff --git a/Documentation/devicetree/bindings/rtc/rtc.yaml b/Documentation/devicetree/bindings/rtc/rtc.yaml > > > > index efb66df82782..0217d229e3fa 100644 > > > > --- a/Documentation/devicetree/bindings/rtc/rtc.yaml > > > > +++ b/Documentation/devicetree/bindings/rtc/rtc.yaml > > > > @@ -26,6 +26,25 @@ properties: > > > > 0: not chargeable > > > > 1: chargeable > > > > > > > > + battery-low-detect: > > > > + $ref: /schemas/types.yaml#/definitions/uint32 > > > > + enum: [0, 1] > > > > + description: | > > > > + For RTC devices supporting a backup battery/supercap, this flag can be > > > > + used to configure the battery low detection reporting function: > > > > + 0: disabled > > > > + 1: enabled > > > > + > > > > + battery-switch-over: > > > > + $ref: /schemas/types.yaml#/definitions/uint32 > > > > + enum: [0, 1] > > > > + description: | > > > > + For RTC devices supporting a backup battery/supercap, this flag can be > > > > + used to configure the battery switch over when the main voltage source is > > > > + turned off: > > > > + 0: disabled > > > > + 1: enabled > > > > > > Why are these implemented as enums? This seems to fall into the category > > > of using DT to determine software policy - why's it not sufficient to > > > have boolean properties that indicate hardware support and let the software > > > decide what to do with them? > > > > Hi Conor, > > the reason is that I based the new properties on the existing property > > "aux-voltage-chargeable": > > > > ------------------- > > aux-voltage-chargeable: > > $ref: /schemas/types.yaml#/definitions/uint32 > > enum: [0, 1] > > description: | > > Tells whether the battery/supercap of the RTC (if any) is > > chargeable or not: > > 0: not chargeable > > 1: chargeable > > ------------------- > > > > I agree with you that a boolean would be more appropriate. Should I > > also submit a (separate) patch to fix the "aux-voltage-chargeable" > > property to a boolean? > > > > No, this is an enum on purpose. > I will not take battery switch over related properties, this is not > hardware description but software configuration. There is an ioctl for > this. Hi Alexandre, can you suggest then how we can set default PWRMNG values for the PCF2131 then? I looked at Documentation/ABI/testing/rtc-cdev but couldn't find an ioctl to activate the battery switch over function, nor one to activate the battery-low detection... Thank you, Hugo. > > > Hugo. > > > > > > > Thanks, > > > Conor. > > > > > > > + > > > > quartz-load-femtofarads: > > > > description: > > > > The capacitive load of the quartz(x-tal), expressed in femto > > > > -- > > > > 2.30.2 > > > > > > -- > Alexandre Belloni, co-owner and COO, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com
