linux-kernel - Re: [PATCH v3 5/7] dt-bindings: soc: starfive: Add StarFive syscon module

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Message-ID: <20230424-footsie-compost-d6624c8ef4e8@spud>
Date:   Mon, 24 Apr 2023 18:15:47 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Xingyu Wu <xingyu.wu@...rfivetech.com>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Hal Feng <hal.feng@...rfivetech.com>,
        William Qiu <william.qiu@...rfivetech.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 5/7] dt-bindings: soc: starfive: Add StarFive syscon
 module

On Fri, Apr 14, 2023 at 10:41:55AM +0800, Xingyu Wu wrote:
> From: William Qiu <william.qiu@...rfivetech.com>
> 
> Add documentation to describe StarFive System Controller Registers.
> 
> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
> ---
>  .../soc/starfive/starfive,jh7110-syscon.yaml  | 58 +++++++++++++++++++
>  MAINTAINERS                                   |  6 ++
>  2 files changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
> 
> diff --git a/Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml b/Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
> new file mode 100644
> index 000000000000..de086e74a229
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
> @@ -0,0 +1,58 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/starfive/starfive,jh7110-syscon.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive JH7110 SoC system controller
> +
> +maintainers:
> +  - William Qiu <william.qiu@...rfivetech.com>
> +
> +description: |
> +  The StarFive JH7110 SoC system controller provides register information such
> +  as offset, mask and shift to configure related modules such as MMC and PCIe.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +              - starfive,jh7110-aon-syscon
> +              - starfive,jh7110-sys-syscon
> +          - const: syscon
> +          - const: simple-mfd
> +      - items:
> +          - const: starfive,jh7110-stg-syscon
> +          - const: syscon
> +
> +  reg:
> +    maxItems: 1
> +
> +  clock-controller:
> +    $ref: /schemas/clock/starfive,jh7110-pll.yaml#
> +    type: object
> +
> +  power-controller:
> +    $ref: /schemas/power/starfive,jh7110-pmu.yaml#
> +    type: object

My plan was to grab this patch after the merge window, but there's been
some back and forth [1] about what exactly should be a power-controller
here. Given the merge window is open & I know Emil wants to look at the
various clock bits for the JH7110, I don't think there's a pressing need
for you to do anything here, but figured I'd at least mention how things
are going on this thread too.

Thanks,
Conor.

1 - https://lore.kernel.org/linux-riscv/20230419035646.43702-1-changhuang.liang@starfivetech.com/T/#m708770e9596098214df769bcc2bdaf9c1a46ca98

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    syscon@...40000 {
> +        compatible = "starfive,jh7110-stg-syscon", "syscon";
> +        reg = <0x10240000 0x1000>;
> +    };
> +
> +    syscon@...30000 {
> +        compatible = "starfive,jh7110-sys-syscon", "syscon", "simple-mfd";
> +        reg = <0x13030000 0x1000>;
> +    };
> +
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 03051ae2e9e5..0fafeea8ebdb 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -19917,6 +19917,11 @@ S:	Supported
>  F:	Documentation/devicetree/bindings/clock/starfive,jh7110-pll.yaml
>  F:	drivers/clk/starfive/clk-starfive-jh7110-pll.*
>  
> +STARFIVE JH7110 SYSCON
> +M:	William Qiu <william.qiu@...rfivetech.com>
> +S:	Supported
> +F:	Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
> +
>  STARFIVE JH71X0 CLOCK DRIVERS
>  M:	Emil Renner Berthing <kernel@...il.dk>
>  M:	Hal Feng <hal.feng@...rfivetech.com>
> @@ -19954,6 +19959,7 @@ STARFIVE SOC DRIVERS
>  M:	Conor Dooley <conor@...nel.org>
>  S:	Maintained
>  T:	git https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/
> +F:	Documentation/devicetree/bindings/soc/starfive/
>  F:	drivers/soc/starfive/
>  
>  STARFIVE TRNG DRIVER
> -- 
> 2.25.1
> 

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