linux-kernel - Re: [PATCH 1/2] doc: Add bindings document for Xilinx LogiCore PR Decoupler

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Date:   Tue, 4 Apr 2017 16:36:29 -0700
From:   Moritz Fischer <moritz.fischer@...us.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Alan Tull <atull@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fpga@...r.kernel.org, Moritz Fischer <mdf@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Sören Brinkmann <soren.brinkmann@...inx.com>,
        Devicetree List <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] doc: Add bindings document for Xilinx LogiCore PR Decoupler

On Thu, Mar 30, 2017 at 05:44:29PM -0500, Rob Herring wrote:
> On Fri, Mar 24, 2017 at 10:33:20AM -0500, Alan Tull wrote:
> > From: Moritz Fischer <mdf@...nel.org>
>
> Please use "dt-bindings: fpga: ..." for the subject.
>
>
> >
> > This adds the binding documentation for the Xilinx LogiCORE PR
> > Decoupler soft core.
> >
> > Signed-off-by: Moritz Fischer <mdf@...nel.org>
> > Signed-off-by: Michal Simek <michal.simek@...inx.com>
> > Acked-by: Alan Tull <atull@...nel.org>
>
> I'm confused why you are sending these instead of Moritz? If it goes
> through you, then it should have your S-o-B too.

Do you want me to resend this Alan (with Rob's suggestions)?
>
> > Cc: Sören Brinkmann <soren.brinkmann@...inx.com>
> > Cc: linux-kernel@...r.kernel.org
> > Cc: devicetree@...r.kernel.org
> > ---
> >  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
> >  1 file changed, 35 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> >
> > diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> > new file mode 100644
> > index 000000000000..2c527ac30398
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> > @@ -0,0 +1,35 @@
> > +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
> > +
> > +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
> > +decouplers / fpga bridges.
> > +The controller can decouple/disable the bridges which prevents signal
> > +changes from passing through the bridge.  The controller can also
> > +couple / enable the bridges which allows traffic to pass through the
> > +bridge normally.
> > +
> > +The Driver supports only MMIO handling. A PR region can have multiple
> > +PR Decouplers which can be handled independently or chained via decouple/
> > +decouple_status signals.
> > +
> > +Required properties:
> > +- compatible : Should contain "xlnx,pr-decoupler-1.00" or "xlnx,pr-decoupler"
>
> I'd drop xlnx,pr-decoupler, but in any case, it should not be OR rather
> "followed by". Plus the example has both.

Michal wanted to have both, so I put both. Personally I don't care. I
think they have some downstream stuff that relied on it.

>
> > +- regs : base address and size for decoupler module
> > +- clocks : input clock to IP
> > +- clock-names : should contain "aclk"
> > +
> > +Optional properties:
> > +- bridge-enable : 0 if driver should disable bridge at startup
> > +  1 if driver should enable bridge at startup
> > +  Default is to leave bridge in current state.
> > +
> > +See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings.
> > +
> > +Example:
> > + fpga-bridge@...000450 {
> > + compatible = "xlnx,pr-decoupler-1.00",
> > +     "xlnx-pr-decoupler";
> > + regs = <0x10000045 0x10>;
> > + clocks = <&clkc 15>;
> > + clock-names = "aclk";
> > + bridge-enable = <0>;
> > + };
> > --
> > 2.11.0
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe devicetree" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html

Thanks,
Moritz