linux-kernel - Re: [PATCH v3 1/3] dt-bindings: reset: Document th1520 reset control

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Message-ID: <20230918-4ef7f52da269f3a7e4023bb3@fedora>
Date:   Mon, 18 Sep 2023 22:26:11 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Kwanghoon Son <k.son@...sung.com>
Cc:     p.zabel@...gutronix.de, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        jszhang@...nel.org, guoren@...nel.org, wefu@...hat.com,
        paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, inki.dae@...sung.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v3 1/3] dt-bindings: reset: Document th1520 reset control

On Mon, Sep 18, 2023 at 04:51:23AM +0000, Kwanghoon Son wrote:
> Add documentation to describe th1520 reset device

I would appreciate if you could add some information here as to what is
missing from this - the reset controller isn't just for two WDTs is it?

> 
> Signed-off-by: Kwanghoon Son <k.son@...sung.com>
> ---
>  .../bindings/reset/thead,th1520-reset.yaml    | 44 +++++++++++++++++++
>  .../dt-bindings/reset/thead,th1520-reset.h    |  9 ++++
>  2 files changed, 53 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/reset/thead,th1520-reset.yaml
>  create mode 100644 include/dt-bindings/reset/thead,th1520-reset.h
> 
> diff --git a/Documentation/devicetree/bindings/reset/thead,th1520-reset.yaml b/Documentation/devicetree/bindings/reset/thead,th1520-reset.yaml
> new file mode 100644
> index 000000000000..49ea8c6a331f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reset/thead,th1520-reset.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reset/thead,th1520-reset.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: T-HEAD th1520 SoC Reset Controller
> +
> +maintainers:
> +  - Kwanghoon Son <k.son@...sung.com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: thead,th1520-reset
> +      - const: syscon

iDumb question perhaps, but why is this a syscon?

Cheers,
Conor.

> +
> +  reg:
> +    maxItems: 1
> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/reset/thead,th1520-reset.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        reset-controller@...f014000 {
> +            compatible = "thead,th1520-reset", "syscon";
> +            reg = <0xff 0xef014000 0x0 0x1000>;
> +            #reset-cells = <1>;
> +        };
> +    };
> diff --git a/include/dt-bindings/reset/thead,th1520-reset.h b/include/dt-bindings/reset/thead,th1520-reset.h
> new file mode 100644
> index 000000000000..ec10751814e5
> --- /dev/null
> +++ b/include/dt-bindings/reset/thead,th1520-reset.h
> @@ -0,0 +1,9 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> +
> +#ifndef DT_BINDING_RESET_TH1520_H
> +#define DT_BINDING_RESET_TH1520_H
> +
> +#define TH1520_RESET_WDT0 0
> +#define TH1520_RESET_WDT1 1


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