linux-kernel - Re: [PATCH v2 4/4] dt-bindings: timer: atmel,at91rm9200-st: convert to yaml

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Message-ID: <20230529-frivolous-refinery-43d91975fff9@wendy>
Date:   Mon, 29 May 2023 13:24:37 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
CC:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <daniel.lezcano@...aro.org>,
        <tglx@...utronix.de>, <wim@...ux-watchdog.org>,
        <linux@...ck-us.net>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-watchdog@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] dt-bindings: timer: atmel,at91rm9200-st: convert
 to yaml

Hey Claudiu,

On Mon, May 29, 2023 at 09:26:04AM +0300, Claudiu Beznea wrote:
> Convert Microchip AT91 system timer to YAML.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> ---
>  .../devicetree/bindings/arm/atmel-sysregs.txt |  9 ---
>  .../bindings/timer/atmel,at91rm9200-st.yaml   | 65 +++++++++++++++++++
>  2 files changed, 65 insertions(+), 9 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml
> 
> diff --git a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
> index 54d3f586403e..68c0eacb01ac 100644
> --- a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
> +++ b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
> @@ -4,15 +4,6 @@ Chipid required properties:
>  - compatible: Should be "atmel,sama5d2-chipid" or "microchip,sama7g5-chipid"
>  - reg : Should contain registers location and length
>  
> -System Timer (ST) required properties:
> -- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
> -- reg: Should contain registers location and length
> -- interrupts: Should contain interrupt for the ST which is the IRQ line
> -  shared across all System Controller members.
> -- clocks: phandle to input clock.
> -Its subnodes can be:
> -- watchdog: compatible should be "atmel,at91rm9200-wdt"
> -
>  RAMC SDRAM/DDR Controller required properties:
>  - compatible: Should be "atmel,at91rm9200-sdramc", "syscon"
>  			"atmel,at91sam9260-sdramc",
> diff --git a/Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml b/Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml
> new file mode 100644
> index 000000000000..a75644e1a2fe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/timer/atmel,at91rm9200-st.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip AT91 System Timer (ST)
> +
> +maintainers:
> +  - Nicolas Ferre <nicolas.ferre@...rochip.com>
> +  - Alexandre Belloni <alexandre.belloni@...rochip.com>

Is that a valid email address?

> +  - Claudiu Beznea <claudiu.beznea@...rochip.com>
> +
> +description:
> +  Microchip AT91 system timer integrates a period interval timer, a watchdog
> +  timer and a real-time timer.
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: atmel,at91rm9200-st
> +      - const: syscon
> +      - const: simple-mfd
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    description:
> +      Contain interrupt for the ST which is the IRQ line shared across all
> +      system controller members.

I don't think there's really much point having a description when there
is only one interrupt, but it cannot do any harm I suppose!

Other than the email address question,
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks,
Conor.

> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  watchdog:
> +    $ref: ../watchdog/atmel,at91rm9200-wdt.yaml
> +    description:
> +      Child node describing watchdog.
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    st: timer@...ffd00 {
> +        compatible = "atmel,at91rm9200-st", "syscon", "simple-mfd";
> +        reg = <0xfffffd00 0x100>;
> +        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
> +        clocks = <&slow_xtal>;
> +
> +        watchdog {
> +            compatible = "atmel,at91rm9200-wdt";
> +        };
> +    };
> +
> +...
> -- 
> 2.34.1
> 

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