linux-kernel - Re: [PATCH 1/3] dt-bindings: rtc: add binding for Sophgo CV1800B rtc controller

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Message-ID: <84a12a2c-3f64-4517-8d38-14c8516e70d0@linaro.org>
Date:   Tue, 21 Nov 2023 10:57:46 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jingbao Qiu <qiujingbao.dlmu@...il.com>, a.zummo@...ertech.it,
        alexandre.belloni@...tlin.com, krzysztof.kozlowski+dt@...aro.org,
        chao.wei@...hgo.com, unicorn_wang@...look.com, conor+dt@...nel.org,
        robh+dt@...nel.org, conor@...nel.org, paul.walmsley@...ive.com,
        palmer@...belt.com, aou@...s.berkeley.edu
Cc:     linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: rtc: add binding for Sophgo CV1800B rtc
 controller

On 21/11/2023 10:46, Jingbao Qiu wrote:
> Add devicetree binding for Sophgo CV1800B SoC rtc controller.

A nit, subject: drop second/last, redundant "binding for". The
"dt-bindings" prefix is already stating that these are bindings.

> 
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@...il.com>
> ---
>  .../bindings/rtc/sophgo,cv1800b-rtc.yaml      | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> new file mode 100644
> index 000000000000..fefb1e70c45c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> @@ -0,0 +1,37 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/rtc/sophgo,cv1800b-rtc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo CV1800B SoC RTC Controller

What is a RTC Controller? You have multiple RTCs there?

> +
> +maintainers:
> +  - Jingbao Qiu <qiujingbao.dlmu@...il.com>
> +

Missing ref to rtc.yaml. Unless it is not applicable but then why?

> +properties:
> +  compatible:
> +    enum:
> +      - sophgo,cv1800b-rtc

Blank line

> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +additionalProperties: false

unevaluatedProperties instead

> +
> +examples:
> +  - |
> +    rtc-controller@...26000{

The names is always "rtc", unless this is not RTC. If it isn't, please
add full description of the hardware.

> +      compatible = "sophgo,cv800b-rtc";
> +      reg = <0x05026000 0x1000>;
> +      interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> +      interrupt-parent = <&plic0>;
> +      clocks = <&osc>;

Why do you send untested bindings? Review costs significant amount of
effort. Code was also not compiled? Warnings not fixed?

Best regards,
Krzysztof