linux-kernel - RE: [PATCH 1/2] dt-bindings: soc: Add ZynqMP PM bindings

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Date:   Wed, 7 Mar 2018 22:55:09 +0000
From:   Jolly Shah <JOLLYS@...inx.com>
To:     Rob Herring <robh@...nel.org>
CC:     "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "andy.gross@...aro.org" <andy.gross@...aro.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "geert+renesas@...der.be" <geert+renesas@...der.be>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "sean.wang@...iatek.com" <sean.wang@...iatek.com>,
        "m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
        "michal.simek@...inx.com" <michal.simek@...inx.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        Rajan Vaja <RAJANV@...inx.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] dt-bindings: soc: Add ZynqMP PM bindings

Hi Rob,

Thanks for the review,

> -----Original Message-----
> From: Rob Herring [mailto:robh@...nel.org]
> Sent: Monday, March 05, 2018 2:33 PM
> To: Jolly Shah <JOLLYS@...inx.com>
> Cc: matthias.bgg@...il.com; andy.gross@...aro.org; shawnguo@...nel.org;
> geert+renesas@...der.be; bjorn.andersson@...aro.org;
> sean.wang@...iatek.com; m.szyprowski@...sung.com;
> michal.simek@...inx.com; mark.rutland@....com; Rajan Vaja
> <RAJANV@...inx.com>; devicetree@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; Jolly Shah
> <JOLLYS@...inx.com>
> Subject: Re: [PATCH 1/2] dt-bindings: soc: Add ZynqMP PM bindings
> 
> On Tue, Feb 27, 2018 at 03:24:25PM -0800, Jolly Shah wrote:
> > Add documentation to describe Xilinx ZynqMP power management bindings.
> >
> > Signed-off-by: Jolly Shah <jollys@...inx.com>
> > Signed-off-by: Rajan Vaja <rajanv@...inx.com>
> > ---
> >  .../bindings/soc/xilinx/xlnx,zynqmp-power.txt      | 28
> ++++++++++++++++++++++
> >  1 file changed, 28 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.txt
> >
> > diff --git
> > a/Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.txt
> > b/Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.txt
> > new file mode 100644
> > index 0000000..5b7d963
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.t
> > +++ xt
> > @@ -0,0 +1,28 @@
> > +Xilinx Zynq MPSoC Power Management Device Tree Bindings
> > +
> > +The zynqmp-power node describes the power management configurations.
> 
> That really tells me nothing. What aspect of power management does this
> interface control?
> 

It controls remote suspend/shutdown interfaces. Will add details in next version.

> > +
> > +Required properties:
> > + - compatible	: Must contain:  "xlnx,zynqmp-power"
> > + - mbox-names	: Name given to channels seen in the 'mboxes' property.
> > +		  "rx" - Mailbox corresponding to receive path
> > +		  "tx" - Mailbox corresponding to transmit path
> > + - mboxes	: Standard property to specify a Mailbox. Each value of
> > +		  the mboxes property should contain a phandle to the
> > +		  mailbox controller device node and an args specifier
> > +		  that will be the phandle to the intended sub-mailbox
> > +		  child node to be used for communication. See
> > +		  Documentation/devicetree/bindings/mailbox/mailbox.txt
> > +		  for more details about the generic mailbox controller
> > +		  and client driver bindings. Also see
> > +		  Documentation/devicetree/bindings/mailbox/ \
> > +		  xlnx,zynqmp-ipi-mailbox.txt for typical controller that
> > +		  is used to communicate with this System controllers.
> 
> No need to define a standard property here. Just need to say how many entries
> and refer to the common binding.
> 

Ok. Will update same in next version.

> > +
> > +Examples:
> > +	zynqmp_power: zynqmp-power {
> > +		compatible = "xlnx,zynqmp-power";
> > +		mboxes = <&ipi_mailbox_pmu0 0>,
> > +			 <&ipi_mailbox_pmu0 1>;
> > +		mbox-names = "tx", "rx";
> > +	};
> > --
> > 2.7.4
> >