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

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Message-ID: <3f85d3c9-05c1-1d80-94ce-84b1581f3404@microchip.com>
Date:   Mon, 29 May 2023 12:34:26 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <Conor.Dooley@...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

On 29.05.2023 15:24, Conor Dooley wrote:
> 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?

Indeed, this is wrong, thanks for pointing it.

> 
>> +  - 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!

OK. Wanted to emphasize that it may be shared with other devices. I'll
remove it.

> 
> 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
>>