Re: [PATCH 1/2] dt-bindings: rtc: m41t80: Convert text schema to YAML one

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On 02/11/2022 18:59, Marek Vasut wrote:
> Convert the m41t80 text schema to YAML schema.
> No functional change.
> 
> Signed-off-by: Marek Vasut <marex@xxxxxxx>
> ---
> Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
> Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
> Cc: linux-rtc@xxxxxxxxxxxxxxx
> To: devicetree@xxxxxxxxxxxxxxx
> ---
>  .../devicetree/bindings/rtc/rtc-m41t80.txt    | 39 ----------
>  .../devicetree/bindings/rtc/rtc-m41t80.yaml   | 75 +++++++++++++++++++
>  2 files changed, 75 insertions(+), 39 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/rtc/rtc-m41t80.txt
>  create mode 100644 Documentation/devicetree/bindings/rtc/rtc-m41t80.yaml
> 
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-m41t80.txt b/Documentation/devicetree/bindings/rtc/rtc-m41t80.txt
> deleted file mode 100644
> index cdd196b1e9bdb..0000000000000
> --- a/Documentation/devicetree/bindings/rtc/rtc-m41t80.txt
> +++ /dev/null
> @@ -1,39 +0,0 @@
> -ST M41T80 family of RTC and compatible
> -
> -Required properties:
> -- compatible: should be one of:
> -	"st,m41t62",
> -	"st,m41t65",
> -	"st,m41t80",
> -	"st,m41t81",
> -	"st,m41t81s",
> -	"st,m41t82",
> -	"st,m41t83",
> -	"st,m41t84",
> -	"st,m41t85",
> -	"st,m41t87",
> -	"microcrystal,rv4162",
> -- reg: I2C bus address of the device
> -
> -Optional properties:
> -- interrupts: rtc alarm interrupt.
> -- clock-output-names: From common clock binding to override the default output
> -                      clock name
> -- wakeup-source: Enables wake up of host system on alarm
> -
> -Optional child node:
> -- clock: Provide this if the square wave pin is used as boot-enabled fixed clock.
> -
> -Example:
> -	rtc@68 {
> -		compatible = "st,m41t80";
> -		reg = <0x68>;
> -		interrupt-parent = <&UIC0>;
> -		interrupts = <0x9 0x8>;
> -
> -		clock {
> -			compatible = "fixed-clock";
> -			#clock-cells = <0>;
> -			clock-frequency = <32768>;
> -		};
> -	};
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-m41t80.yaml b/Documentation/devicetree/bindings/rtc/rtc-m41t80.yaml
> new file mode 100644
> index 0000000000000..7f31a22caec9b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/rtc-m41t80.yaml

Filename based on compatibles (more or less), so could be:
st,m41t80.yaml
or:
st,m41txx.yaml

The "rtc" name can be skipped as it is implied from subsystem folder,
unless st,m41txx is a name of some SoC?


> @@ -0,0 +1,75 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/rtc/rtc-m41t80.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ST M41T80 family of RTC and compatible
> +
> +maintainers:
> +  - Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - st,m41t62
> +      - st,m41t65
> +      - st,m41t80
> +      - st,m41t81
> +      - st,m41t81s
> +      - st,m41t82
> +      - st,m41t83
> +      - st,m41t84
> +      - st,m41t85
> +      - st,m41t87
> +      - microcrystal,rv4162
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  "#clock-cells":
> +    const: 1

Hm, why do you have it?

> +
> +  clock-output-names:
> +    description: From common clock binding to override the default output clock name.

You need maxItems

> +
> +  wakeup-source:
> +    description: Enables wake up of host system on alarm.

Skip the property - it comes from rtc.yaml.

> +
> +  clock:
> +    type: object
> +    $ref: /schemas/clock/fixed-clock.yaml#
> +    properties:
> +      clock-frequency:
> +        const: 32768
> +

Best regards,
Krzysztof




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