linux-kernel - Re: [PATCH v16 4/5] dt-bindings: remoteproc: Add documentation for ZynqMP R5 rproc bindings

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Message-ID: <alpine.DEB.2.21.2009301536490.10908@sstabellini-ThinkPad-T480s>
Date:   Wed, 30 Sep 2020 15:40:08 -0700 (PDT)
From:   Stefano Stabellini <stefano.stabellini@...inx.com>
To:     Rob Herring <robh@...nel.org>
cc:     Ben Levinsky <ben.levinsky@...inx.com>, stefanos@...inx.com,
        michals@...inx.com, michael.auchter@...com,
        devicetree@...r.kernel.org, mathieu.poirier@...aro.org,
        emooring@...inx.com, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Jason Wu <j.wu@...inx.com>, Wendy Liang <jliang@...inx.com>,
        Michal Simek <michal.simek@...inx.com>
Subject: Re: [PATCH v16 4/5] dt-bindings: remoteproc: Add documentation for
 ZynqMP R5 rproc bindings

On Tue, 29 Sep 2020, Rob Herring wrote:
> > index 000000000000..ce02e425692e
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml
> > @@ -0,0 +1,120 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: "http://devicetree.org/schemas/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml#"
> > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> > +
> > +title: Xilinx R5 remote processor controller bindings
> > +
> > +description:
> > +  This document defines the binding for the remoteproc component that loads and
> > +  boots firmwares on the Xilinx Zynqmp and Versal family chipset.
> > +
> > +  Note that the Linux has global addressing view of the R5-related memory (TCM)
> > +  so the absolute address ranges are provided in TCM reg's.
> 
> blank line needed.
> 
> TCMs specifically I'm concerned about how they are represented in system 
> DT and here...

So far I have been keeping the TCMs in system DT as regular nodes under
/amba. E.g.:

		tcm: tcm@...00000 {
			compatible = "mmio-sram";
			reg = <0x0 0xffe00000 0x0 0x10000>;
		};

(I am not sure if "mmio-sram" is the right compatible.)