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Date:   Sat, 13 Feb 2021 11:26:20 +0000
From:   Peng Fan <peng.fan@....com>
To:     Rob Herring <robh@...nel.org>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>
CC:     "ohad@...ery.com" <ohad@...ery.com>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "mathieu.poirier@...aro.org" <mathieu.poirier@...aro.org>,
        "o.rempel@...gutronix.de" <o.rempel@...gutronix.de>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...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>,
        "paul@...pouillou.net" <paul@...pouillou.net>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "agross@...nel.org" <agross@...nel.org>,
        "patrice.chotard@...com" <patrice.chotard@...com>
Subject: RE: [PATCH V10 01/10] dt-bindings: remoteproc: convert imx rproc
 bindings to json-schema

> Subject: Re: [PATCH V10 01/10] dt-bindings: remoteproc: convert imx rproc
> bindings to json-schema
> 
> On Mon, Feb 08, 2021 at 04:56:02PM +0800, peng.fan@....nxp.com wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > Convert the imx rproc binding to DT schema format using json-schema.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  .../bindings/remoteproc/fsl,imx-rproc.yaml    | 59
> +++++++++++++++++++
> >  .../bindings/remoteproc/imx-rproc.txt         | 33 -----------
> >  2 files changed, 59 insertions(+), 33 deletions(-)  create mode
> > 100644 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> >  delete mode 100644
> > Documentation/devicetree/bindings/remoteproc/imx-rproc.txt
> >
> > diff --git
> > a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> > b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> > new file mode 100644
> > index 000000000000..5e906fa6a39d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> > @@ -0,0 +1,59 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id:
> "https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevice
> tree.org%2Fschemas%2Fremoteproc%2Ffsl%2Cimx-rproc.yaml%23&amp;dat
> a=04%7C01%7Cpeng.fan%40nxp.com%7Cd1b06ffd889240a45f8308d8cdea93
> 40%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C6374857546682
> 06133%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2l
> uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=jTnFLISLpjJN
> vV4euhlqUvnj9YMk9YoDZWoxQi97kdc%3D&amp;reserved=0"
> > +$schema:
> "https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevice
> tree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cpeng.f
> an%40nxp.com%7Cd1b06ffd889240a45f8308d8cdea9340%7C686ea1d3bc2b
> 4c6fa92cd99c5c301635%7C0%7C0%7C637485754668206133%7CUnknown
> %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha
> WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=98u0FLfvAhOiYoT7Vvbqg6yW5
> wVEmLVrhLvCz83VRiM%3D&amp;reserved=0"
> > +
> > +title: NXP iMX6SX/iMX7D Co-Processor Bindings
> > +
> > +description:
> > +  This binding provides support for ARM Cortex M4 Co-processor found on
> some NXP iMX SoCs.
> > +
> > +maintainers:
> > +  - Peng Fan <peng.fan@....com>
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - fsl,imx7d-cm4
> > +      - fsl,imx6sx-cm4
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  syscon:
> > +    $ref: /schemas/types.yaml#/definitions/phandle
> > +    description:
> > +      Phandle to syscon block which provide access to System Reset
> > + Controller
> > +
> > +  memory-region:
> > +    description:
> > +      If present, a phandle for a reserved memory area that used for
> vdev buffer,
> > +      resource table, vring region and others used by remote processor.
> 
> You need to define what each one is as a schema. How does the driver know
> which one is the vring region for example? Minimally, it's:
> 
> items:
>   - description: ...
>   - description: ...
>   - description: ...
> 
> But if what's present is variable, then it gets more complicated. If the OS side
> doesn't need to know what each region is, then you can do just:
> 
> minItems: N
> maxItems: M

I'll use minItems: 1, no maxItems.

Thanks,
Peng.

> 
> Rob
> 
> 
> 
> > +
> > +required:
> > +  - compatible
> > +  - clocks
> > +  - syscon
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/imx7d-clock.h>
> > +    m4_reserved_sysmem1: cm4@...00000 {
> > +      reg = <0x80000000 0x80000>;
> > +    };
> > +
> > +    m4_reserved_sysmem2: cm4@...00000 {
> > +      reg = <0x81000000 0x80000>;
> > +    };
> > +
> > +    imx7d-cm4 {
> > +      compatible	= "fsl,imx7d-cm4";
> > +      memory-region	= <&m4_reserved_sysmem1>,
> <&m4_reserved_sysmem2>;
> > +      syscon		= <&src>;
> > +      clocks		= <&clks IMX7D_ARM_M4_ROOT_CLK>;
> > +    };
> > +
> > +...
> > diff --git
> > a/Documentation/devicetree/bindings/remoteproc/imx-rproc.txt
> > b/Documentation/devicetree/bindings/remoteproc/imx-rproc.txt
> > deleted file mode 100644
> > index fbcefd965dc4..000000000000
> > --- a/Documentation/devicetree/bindings/remoteproc/imx-rproc.txt
> > +++ /dev/null
> > @@ -1,33 +0,0 @@
> > -NXP iMX6SX/iMX7D Co-Processor Bindings
> > -----------------------------------------
> > -
> > -This binding provides support for ARM Cortex M4 Co-processor found on
> > some -NXP iMX SoCs.
> > -
> > -Required properties:
> > -- compatible		Should be one of:
> > -				"fsl,imx7d-cm4"
> > -				"fsl,imx6sx-cm4"
> > -- clocks		Clock for co-processor (See: ../clock/clock-bindings.txt)
> > -- syscon		Phandle to syscon block which provide access to
> > -			System Reset Controller
> > -
> > -Optional properties:
> > -- memory-region		list of phandels to the reserved memory regions.
> > -			(See: ../reserved-memory/reserved-memory.txt)
> > -
> > -Example:
> > -	m4_reserved_sysmem1: cm4@...00000 {
> > -		reg = <0x80000000 0x80000>;
> > -	};
> > -
> > -	m4_reserved_sysmem2: cm4@...00000 {
> > -		reg = <0x81000000 0x80000>;
> > -	};
> > -
> > -	imx7d-cm4 {
> > -		compatible	= "fsl,imx7d-cm4";
> > -		memory-region	= <&m4_reserved_sysmem1>,
> <&m4_reserved_sysmem2>;
> > -		syscon		= <&src>;
> > -		clocks		= <&clks IMX7D_ARM_M4_ROOT_CLK>;
> > -	};
> > --
> > 2.30.0
> >

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