linux-kernel - Re: [PATCH v2 08/16] dt-bindings: soc: socionext: Add UniPhier system controller

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Date:   Fri, 9 Dec 2022 00:09:59 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 08/16] dt-bindings: soc: socionext: Add UniPhier system
 controller

On 2022/12/08 17:15, Krzysztof Kozlowski wrote:
> On 07/12/2022 06:53, Kunihiko Hayashi wrote:
>> Add devicetree binding schema for the system controller implemented on
>> Socionext Uniphier SoCs.
>>
>> This system controller has multiple functions such as clock control,
>> reset control, internal watchdog timer, thermal management, and so on.
>>
>> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
>> ---
>>   .../socionext/socionext,uniphier-sysctrl.yaml | 105 ++++++++++++++++++
>>   MAINTAINERS                                   |   1 +
>>   2 files changed, 106 insertions(+)
>>   create mode 100644
>> Documentation/devicetree/bindings/soc/socionext/socionext,uniphier-sysctrl.yaml
>>
>> diff --git
>> a/Documentation/devicetree/bindings/soc/socionext/socionext,uniphier-sysctrl.yaml
>> b/Documentation/devicetree/bindings/soc/socionext/socionext,uniphier-sysctrl.yaml
>> new file mode 100644
>> index 000000000000..c1b7cec8def4
>> --- /dev/null
>> +++
>> b/Documentation/devicetree/bindings/soc/socionext/socionext,uniphier-sysctrl.yaml
>> @@ -0,0 +1,105 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id:
>> http://devicetree.org/schemas/soc/socionext/socionext,uniphier-sysctrl.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Socionext UniPhier system controller
>> +
>> +maintainers:
>> +  - Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
>> +
>> +description: |+
>> +  System controller implemented on Socionext UniPhier SoCs has multiple
>> +  functions such as clock control, reset control, internal watchdog
>> timer,
>> +  thermal management, and so on.
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - enum:
>> +          - socionext,uniphier-ld4-sysctrl
>> +          - socionext,uniphier-pro4-sysctrl
>> +          - socionext,uniphier-pro5-sysctrl
>> +          - socionext,uniphier-pxs2-sysctrl
>> +          - socionext,uniphier-sld8-sysctrl
>> +          - socionext,uniphier-ld11-sysctrl
>> +          - socionext,uniphier-ld20-sysctrl
>> +          - socionext,uniphier-pxs3-sysctrl
>> +          - socionext,uniphier-nx1-sysctrl
>> +      - const: simple-mfd
>> +      - const: syscon
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +patternProperties:
>> +  "^clock-controller(@[0-9a-f]+)?$":
> 
> I don't remember if we talked about this but: why do you include here
> unit address? All your bindings expect these take regmap from the parent
> and they do not have separate MMIO address space, so these should be
> properties, not pattern properties.

I thought this unit address was an option, however, there is no example
of the existing devicetree. It is no longer necessary.

> Same in places below.
 >
>> +    $ref: /schemas/clock/socionext,uniphier-clock.yaml#
>> +
>> +  "^reset-controller(@[0-9a-f]+)?$":
>> +    $ref: /schemas/reset/socionext,uniphier-reset.yaml#
>> +
>> +  "^watchdog(@[0-9a-f]+)?$":
>> +    $ref: /schemas/watchdog/socionext,uniphier-wdt.yaml#
>> +
>> +  "^thermal-sensor(@[0-9a-f]+)?$":
>> +    $ref: /schemas/thermal/socionext,uniphier-thermal.yaml#

I'll drop the address patterns.

Thank you,

---
Best Regards
Kunihiko Hayashi