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Message-ID: <AM6PR04MB49669345E21DC28009C486E680B90@AM6PR04MB4966.eurprd04.prod.outlook.com>
Date:   Tue, 19 May 2020 02:46:21 +0000
From:   Aisheng Dong <aisheng.dong@....com>
To:     Anson Huang <anson.huang@....com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.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>,
        Jacky Bai <ping.bai@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH 1/3] dt-bindings: timer: Convert i.MX GPT to json-schema

> From: Anson Huang <Anson.Huang@....com>
> Sent: Monday, May 18, 2020 10:48 PM
> 
> Convert the i.MX GPT binding to DT schema format using json-schema.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  .../devicetree/bindings/timer/fsl,imxgpt.txt       |  45 ---------
>  .../devicetree/bindings/timer/fsl,imxgpt.yaml      | 109
> +++++++++++++++++++++
>  2 files changed, 109 insertions(+), 45 deletions(-)  delete mode 100644
> Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
>  create mode 100644
> Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
> b/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
> deleted file mode 100644
> index 5d8fd5b..0000000
> --- a/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
> +++ /dev/null
> @@ -1,45 +0,0 @@
> -Freescale i.MX General Purpose Timer (GPT)
> -
> -Required properties:
> -
> -- compatible : should be one of following:
> -  for i.MX1:
> -  - "fsl,imx1-gpt";
> -  for i.MX21:
> -  - "fsl,imx21-gpt";
> -  for i.MX27:
> -  - "fsl,imx27-gpt", "fsl,imx21-gpt";
> -  for i.MX31:
> -  - "fsl,imx31-gpt";
> -  for i.MX25:
> -  - "fsl,imx25-gpt", "fsl,imx31-gpt";
> -  for i.MX50:
> -  - "fsl,imx50-gpt", "fsl,imx31-gpt";
> -  for i.MX51:
> -  - "fsl,imx51-gpt", "fsl,imx31-gpt";
> -  for i.MX53:
> -  - "fsl,imx53-gpt", "fsl,imx31-gpt";
> -  for i.MX6Q:
> -  - "fsl,imx6q-gpt", "fsl,imx31-gpt";
> -  for i.MX6DL:
> -  - "fsl,imx6dl-gpt";
> -  for i.MX6SL:
> -  - "fsl,imx6sl-gpt", "fsl,imx6dl-gpt";
> -  for i.MX6SX:
> -  - "fsl,imx6sx-gpt", "fsl,imx6dl-gpt";
> -- reg : specifies base physical address and size of the registers.
> -- interrupts : should be the gpt interrupt.
> -- clocks : the clocks provided by the SoC to drive the timer, must contain
> -           an entry for each entry in clock-names.
> -- clock-names : must include "ipg" entry first, then "per" entry.
> -
> -Example:
> -
> -gpt1: timer@...03000 {
> -	compatible = "fsl,imx27-gpt", "fsl,imx21-gpt";
> -	reg = <0x10003000 0x1000>;
> -	interrupts = <26>;
> -	clocks = <&clks IMX27_CLK_GPT1_IPG_GATE>,
> -		 <&clks IMX27_CLK_PER1_GATE>;
> -	clock-names = "ipg", "per";
> -};
> diff --git a/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
> b/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
> new file mode 100644
> index 0000000..5c7186b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
> @@ -0,0 +1,109 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> +---
> +
> +title: Freescale i.MX General Purpose Timer (GPT)
> +
> +maintainers:
> +  - Sascha Hauer <s.hauer@...gutronix.de>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - description: on i.MX1 the following compatible must be specified

Such a description seems not necessary in order to make the doc more clean

> +        items:
> +          - const: "fsl,imx1-gpt"
> +
> +      - description: on i.MX21 the following compatible must be specified
> +        items:
> +          - const: "fsl,imx21-gpt"
> +
> +      - description: on i.MX27 the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx27-gpt"
> +          - const: "fsl,imx21-gpt"
> +
> +      - description: on i.MX31 the following compatible must be specified
> +        items:
> +          - const: "fsl,imx31-gpt"
> +
> +      - description: on i.MX25 the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx25-gpt"
> +          - const: "fsl,imx31-gpt"
> +
> +      - description: on i.MX50 the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx50-gpt"
> +          - const: "fsl,imx31-gpt"
> +
> +      - description: on i.MX51 the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx51-gpt"
> +          - const: "fsl,imx31-gpt"
> +
> +      - description: on i.MX53 the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx53-gpt"
> +          - const: "fsl,imx31-gpt"
> +
> +      - description: on i.MX6Q the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx6q-gpt"
> +          - const: "fsl,imx31-gpt"
> +
> +      - description: on i.MX6DL the following compatible must be specified
> +        items:
> +          - const: "fsl,imx6dl-gpt"
> +
> +      - description: on i.MX6SL the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx6sl-gpt"
> +          - const: "fsl,imx6dl-gpt"
> +
> +      - description: on i.MX6SX the following compatibles must be specified
> +        items:
> +          - const: "fsl,imx6sx-gpt"
> +          - const: "fsl,imx6dl-gpt"
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: SoC GPT ipg clock
> +      - description: SoC GPT per clock
> +    maxItems: 2

maxItems is not needed

> +
> +  clock-names:
> +    items:
> +      - const: ipg
> +      - const: per
> +    maxItems: 2

Ditto 

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx27-clock.h>
> +
> +    timer@...03000 {
> +        compatible = "fsl,imx27-gpt", "fsl,imx21-gpt";
> +        reg = <0x10003000 0x1000>;
> +        interrupts = <26>;
> +        clocks = <&clks IMX27_CLK_GPT1_IPG_GATE>,
> +                 <&clks IMX27_CLK_PER1_GATE>;
> +        clock-names = "ipg", "per";
> +    };
> --
> 2.7.4

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