Re: [PATCH v4 07/20] dt-bindings: arm: hisilicon: convert system controller bindings to json-schema

[Rob Herring <robh@kernel.org>]

On Mon, Sep 28, 2020 at 11:13:11PM +0800, Zhen Lei wrote:
> Convert the Hisilicon system controller and its variants binding to DT
> schema format using json-schema. All of them are grouped into one yaml
> file, to help users understand differences and avoid repeated
> descriptions.
> 
> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
> ---
>  .../controller/hisilicon,hi6220-sysctrl.txt        |  19 ----
>  .../controller/hisilicon,hip01-sysctrl.txt         |  19 ----
>  .../arm/hisilicon/controller/hisilicon,sysctrl.txt |  25 -----
>  .../hisilicon/controller/hisilicon,sysctrl.yaml    | 115 +++++++++++++++++++++
>  .../bindings/arm/hisilicon/hi3519-sysctrl.txt      |  14 ---
>  5 files changed, 115 insertions(+), 77 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-sysctrl.txt
>  delete mode 100644 Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hip01-sysctrl.txt
>  delete mode 100644 Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.txt
>  create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.yaml
>  delete mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hi3519-sysctrl.txt
> 
> diff --git a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-sysctrl.txt b/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-sysctrl.txt
> deleted file mode 100644
> index 07e318eda254f52..000000000000000
> --- a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-sysctrl.txt
> +++ /dev/null
> @@ -1,19 +0,0 @@
> -Hisilicon Hi6220 system controller
> -
> -Required properties:
> -- compatible : "hisilicon,hi6220-sysctrl"
> -- reg : Register address and size
> -- #clock-cells: should be set to 1, many clock registers are defined
> -  under this controller and this property must be present.
> -
> -Hisilicon designs this controller as one of the system controllers,
> -its main functions are the same as Hisilicon system controller, but
> -the register offset of some core modules are different.
> -
> -Example:
> -	/*for Hi6220*/
> -	sys_ctrl: sys_ctrl@f7030000 {
> -		compatible = "hisilicon,hi6220-sysctrl", "syscon";
> -		reg = <0x0 0xf7030000 0x0 0x2000>;
> -		#clock-cells = <1>;
> -	};
> diff --git a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hip01-sysctrl.txt b/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hip01-sysctrl.txt
> deleted file mode 100644
> index db2dfdce799db91..000000000000000
> --- a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hip01-sysctrl.txt
> +++ /dev/null
> @@ -1,19 +0,0 @@
> -Hisilicon HiP01 system controller
> -
> -Required properties:
> -- compatible : "hisilicon,hip01-sysctrl"
> -- reg : Register address and size
> -
> -The HiP01 system controller is mostly compatible with hisilicon
> -system controller,but it has some specific control registers for
> -HIP01 SoC family, such as slave core boot, and also some same
> -registers located at different offset.
> -
> -Example:
> -
> -	/* for hip01-ca9x2 */
> -	sysctrl: system-controller@10000000 {
> -		compatible = "hisilicon,hip01-sysctrl", "hisilicon,sysctrl";
> -		reg = <0x10000000 0x1000>;
> -		reboot-offset = <0x4>;
> -	};
> diff --git a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.txt b/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.txt
> deleted file mode 100644
> index 963f7f1ca7a2f0c..000000000000000
> --- a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.txt
> +++ /dev/null
> @@ -1,25 +0,0 @@
> -Hisilicon system controller
> -
> -Required properties:
> -- compatible : "hisilicon,sysctrl"
> -- reg : Register address and size
> -
> -Optional properties:
> -- smp-offset : offset in sysctrl for notifying slave cpu booting
> -		cpu 1, reg;
> -		cpu 2, reg + 0x4;
> -		cpu 3, reg + 0x8;
> -		If reg value is not zero, cpun exit wfi and go
> -- resume-offset : offset in sysctrl for notifying cpu0 when resume
> -- reboot-offset : offset in sysctrl for system reboot
> -
> -Example:
> -
> -	/* for Hi3620 */
> -	sysctrl: system-controller@fc802000 {
> -		compatible = "hisilicon,sysctrl";
> -		reg = <0xfc802000 0x1000>;
> -		smp-offset = <0x31c>;
> -		resume-offset = <0x308>;
> -		reboot-offset = <0x4>;
> -	};
> diff --git a/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.yaml b/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.yaml
> new file mode 100644
> index 000000000000000..37b214e0a401d7d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.yaml
> @@ -0,0 +1,115 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/hisilicon/controller/hisilicon,sysctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Hisilicon system controller
> +
> +maintainers:
> +  - Wei Xu <xuwei5@hisilicon.com>
> +
> +description: |
> +  The Hisilicon system controller is used on many Hisilicon boards, it can be
> +  used to assist the slave core startup, reboot the system, etc.
> +
> +  There are some variants of the Hisilicon system controller, such as HiP01,
> +  Hi3519, Hi6220 system controller, each of them is mostly compatible with the
> +  Hisilicon system controller, but some same registers located at different
> +  offset. In addition, the HiP01 system controller has some specific control
> +  registers for HIP01 SoC family, such as slave core boot.
> +
> +  The compatible names of each system controller are as follows:
> +  Hisilicon system controller   --> hisilicon,sysctrl
> +  HiP01     system controller   --> hisilicon,hip01-sysctrl
> +  Hi6220    system controller   --> hisilicon,hi6220-sysctrl
> +  Hi3519    system controller   --> hisilicon,hi3519-sysctrl
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: hisilicon,hi6220-sysctrl
> +    then:
> +      required:
> +        - '#clock-cells'
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - const: hisilicon,sysctrl
> +      - items:
> +          - const: hisilicon,sysctrl
> +          - const: syscon

Of these 2, the 1st case should be fixed (add 'syscon' in the dts 
files).

> +      - items:
> +          - const: hisilicon,hip01-sysctrl
> +          - const: hisilicon,sysctrl
> +      - items:
> +          - const: hisilicon,hi6220-sysctrl
> +          - const: syscon
> +      - items:
> +          - const: hisilicon,hi3519-sysctrl
> +          - const: syscon

All the cases with 'syscon' can be a single entry. Use 'enum' for the 
1st string.

> +
> +  reg:
> +    description: Register address and size

That's every 'reg' property. Drop it.

> +    maxItems: 1
> +
> +  smp-offset:
> +    description: |
> +      offset in sysctrl for notifying slave cpu booting
> +      cpu 1, reg;
> +      cpu 2, reg + 0x4;
> +      cpu 3, reg + 0x8;
> +      If reg value is not zero, cpun exit wfi and go
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +  resume-offset:
> +    description: offset in sysctrl for notifying cpu0 when resume
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +  reboot-offset:
> +    description: offset in sysctrl for system reboot
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +  '#clock-cells':
> +    description: the number of cells occupied by one clock ID.

Drop.

> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg

additionalProperties: false

(and in other patches)

> +
> +examples:
> +  - |
> +    /* Hisilicon system controller */
> +    system-controller@fc802000 {
> +        compatible = "hisilicon,sysctrl";
> +        reg = <0xfc802000 0x1000>;
> +        smp-offset = <0x31c>;
> +        resume-offset = <0x308>;
> +        reboot-offset = <0x4>;
> +    };
> +
> +    /* HiP01 system controller */
> +    system-controller@10000000 {
> +        compatible = "hisilicon,hip01-sysctrl", "hisilicon,sysctrl";
> +        reg = <0x10000000 0x1000>;
> +        reboot-offset = <0x4>;
> +    };
> +
> +    /* Hi6220 system controller */
> +    system-controller@f7030000 {
> +        compatible = "hisilicon,hi6220-sysctrl", "syscon";
> +        reg = <0xf7030000 0x2000>;
> +        #clock-cells = <1>;
> +    };
> +
> +    /* Hi3519 system controller */
> +    system-controller@12010000 {
> +        compatible = "hisilicon,hi3519-sysctrl", "syscon";
> +        reg = <0x12010000 0x1000>;
> +    };
> +...
> diff --git a/Documentation/devicetree/bindings/arm/hisilicon/hi3519-sysctrl.txt b/Documentation/devicetree/bindings/arm/hisilicon/hi3519-sysctrl.txt
> deleted file mode 100644
> index 8defacc44dd5b9e..000000000000000
> --- a/Documentation/devicetree/bindings/arm/hisilicon/hi3519-sysctrl.txt
> +++ /dev/null
> @@ -1,14 +0,0 @@
> -* Hisilicon Hi3519 System Controller Block
> -
> -This bindings use the following binding:
> -Documentation/devicetree/bindings/mfd/syscon.yaml
> -
> -Required properties:
> -- compatible: "hisilicon,hi3519-sysctrl".
> -- reg: the register region of this block
> -
> -Examples:
> -sysctrl: system-controller@12010000 {
> -	compatible = "hisilicon,hi3519-sysctrl", "syscon";
> -	reg = <0x12010000 0x1000>;
> -};
> -- 
> 1.8.3
> 
> 

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