[PATCH v2 01/12] dt-bindings: soc: starfive: Add StarFive JHB100 syscon modules

[Conor Dooley]

On Tue, May 12, 2026 at 01:35:10AM -0700, Changhuang Liang wrote:
> Add documentation to describe StarFive JHB100 SoC System Controller
> Registers.
> 
> Signed-off-by: Changhuang Liang <changhuang.liang at starfivetech.com>
> ---
>  .../soc/starfive/starfive,jhb100-syscon.yaml  | 107 ++++++++++++++++++
>  MAINTAINERS                                   |   5 +
>  2 files changed, 112 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/starfive/starfive,jhb100-syscon.yaml
> 
> diff --git a/Documentation/devicetree/bindings/soc/starfive/starfive,jhb100-syscon.yaml b/Documentation/devicetree/bindings/soc/starfive/starfive,jhb100-syscon.yaml
> new file mode 100644
> index 000000000000..0add3d9727ac
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/starfive/starfive,jhb100-syscon.yaml
> @@ -0,0 +1,107 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/starfive/starfive,jhb100-syscon.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive JHB100 SoC system controller
> +
> +maintainers:
> +  - Kevin Xie <kevin.xie at starfivetech.com>
> +  - Changhuang Liang <changhuang.liang at starfivetech.com>
> +
> +description:
> +  The StarFive JHB100 SoC system controller contains MMIO registers used by
> +  other hardware modules (e.g., PLL, eMMC, PCIe). These modules access
> +  specific register offsets, bit masks, and shifts within the system
> +  controller region for configuration and status.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - starfive,jhb100-b2h-syscon
> +          - starfive,jhb100-gpu-syscon
> +          - starfive,jhb100-h2b-syscon
> +          - starfive,jhb100-host-syscon
> +          - starfive,jhb100-husb-syscon
> +          - starfive,jhb100-husbcmn-syscon
> +          - starfive,jhb100-husbd-syscon
> +          - starfive,jhb100-npu-syscon
> +          - starfive,jhb100-pcieep-ecsr-syscon
> +          - starfive,jhb100-pcierp-ecsr-syscon
> +          - starfive,jhb100-pcierp-syscon
> +          - starfive,jhb100-per0-syscon
> +          - starfive,jhb100-per1-syscon
> +          - starfive,jhb100-per2-syscon
> +          - starfive,jhb100-per3-syscon
> +          - starfive,jhb100-strap-syscon
> +          - starfive,jhb100-sys0-syscon
> +          - starfive,jhb100-sys1-syscon
> +          - starfive,jhb100-sys2-syscon
> +          - starfive,jhb100-usb-syscon
> +          - starfive,jhb100-vout-syscon
> +      - const: syscon
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  '#clock-cells':
> +    const: 1
> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - starfive,jhb100-per0-syscon
> +              - starfive,jhb100-per1-syscon
> +              - starfive,jhb100-sys0-syscon
> +    then:
> +      required:
> +        - clocks
> +        - '#clock-cells'

Probably missing and else: clocks/clock-cells: false?
And the same below for resets?

> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: starfive,jhb100-pcierp-syscon
> +    then:
> +      required:
> +        - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    syscon at 13010000 {
> +        compatible = "starfive,jhb100-sys0-syscon", "syscon";
> +        reg = <0x13010000 0x2000>;
> +        clocks = <&osc>;
> +        #clock-cells = <1>;
> +    };
> +
> +    syscon at 13014000 {
> +        compatible = "starfive,jhb100-sys1-syscon", "syscon";
> +        reg = <0x13014000 0x4000>;
> +    };
> +
> +    syscon at 11719000 {
> +        compatible = "starfive,jhb100-pcierp-syscon", "syscon";
> +        reg = <0x11719000 0x1000>;
> +        #reset-cells = <1>;
> +    };
> +
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 47e4b368347f..6f6aac7cea95 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -25613,6 +25613,11 @@ S:	Maintained
>  F:	drivers/reset/starfive/reset-starfive-jhb1*
>  F:	include/dt-bindings/reset/starfive,jhb1*.h
>  
> +STARFIVE JHB100 SYSCON
> +M:	Changhuang Liang <changhuang.liang at starfivetech.com>
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/soc/starfive/starfive,jhb100-syscon.yaml
> +
>  STATIC BRANCH/CALL
>  M:	Peter Zijlstra <peterz at infradead.org>
>  M:	Josh Poimboeuf <jpoimboe at kernel.org>
> -- 
> 2.25.1
> 
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