Subject: [linux-sunxi] [PATCH 6/8] ARM: dts: axp209: Add usb_power_supply child node to the ax209 node

From: [email-masked] (Bruno Prémont)
Date: Fri, 31 Jul 2015 07:51:04 +0200

Hi ChenYu,

On Fri, 31 Jul 2015 13:31:53 +0800 Chen-Yu Tsai wrote:
> Hi Hans,
> 
> On Wed, Jun 10, 2015 at 5:37 AM, Hans de Goede <[email-masked]> wrote:
> > Add a node representing the usb power supply part of the axp209 pmic, note
> > that the usb power supply and the (to be added later) ac power supply will
> > each have their own child-node, so that they can be separately specified
> > as power-supply for other nodes using a power-supply property with a
> > phandle pointing to the right axp209 child-node.
> >
> > Signed-off-by: Hans de Goede <[email-masked]>
> > ---
> >  arch/arm/boot/dts/axp209.dtsi | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/axp209.dtsi b/arch/arm/boot/dts/axp209.dtsi
> > index 24c935c..051ab3b 100644
> > --- a/arch/arm/boot/dts/axp209.dtsi
> > +++ b/arch/arm/boot/dts/axp209.dtsi
> > @@ -89,4 +89,9 @@
> >                         regulator-name = "ldo5";
> >                 };
> >         };
> > +
> > +       usb_power_supply: usb_power_supply {
> > +               compatible = "x-powers,axp202-usb-power-supply";
> > +               status = "disabled";
> 
> Is there any reason to have this disabled by default?
> AFAIK this is not something configurable in hardware,
> and the driver just gives readouts and status updates.

There are some devices that only have 'AC-IN' instead of usb/otg power
(set-top boxes) so having the devices tell what power sources they
have makes sense (otherwise those that have ac-in instead of otg would
have to disable usb_power_supply) and avoids confusion by explicitly
stating presence in device dts.

NB: I should hopefully get my battery supply driver ported this WE,
ac-in/rtc are done, this WE. I'm going to default-off for them as well
(note that for some extra details should be provided in dts).

Bruno

> ChenYu
> > +       };
> >  };
> > --
> > 2.3.6