linux-kernel - Re: [PATCH 6/6] dt-bindings: soc: amlogic: update sysctrl clock-controller subnode type

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Message-ID: <039e9f93-5b97-bb5e-e3c0-b8bf2c52a2a3@linaro.org>
Date:   Mon, 13 Feb 2023 12:03:13 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH 6/6] dt-bindings: soc: amlogic: update sysctrl
 clock-controller subnode type

Hi,

On 13/02/2023 12:00, Krzysztof Kozlowski wrote:
> On 09/02/2023 14:41, Neil Armstrong wrote:
>> Since the clock controllers are now documented define the right ref
>> for the clock-controller subnodes and fill up the example node.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>> ---
>>   .../soc/amlogic/amlogic,meson-gx-hhi-sysctrl.yaml         | 15 ++++++++++++++-
>>   1 file changed, 14 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-gx-hhi-sysctrl.yaml b/Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-gx-hhi-sysctrl.yaml
>> index 672eabd90c09..57eae355f1b9 100644
>> --- a/Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-gx-hhi-sysctrl.yaml
>> +++ b/Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-gx-hhi-sysctrl.yaml
>> @@ -43,6 +43,10 @@ allOf:
>>               - amlogic,meson-gx-hhi-sysctrl
>>               - amlogic,meson-axg-hhi-sysctrl
>>       then:
>> +      properties:
>> +        clock-controller:
>> +          $ref: /schemas/clock/amlogic,gxbb-clkc.yaml#
> 
> You just added this binding. I don't understand the split.

It's a chicken and egg problem, the clock controller bindings (patches 4 & 6)
I've added the system-controller top node in the DT example, but this
example won't be valid until I add the system-controller bindings.

To solve this, I add it in 2 steps, but if it's an *real* issue I can remove
the top system-controller nodes in the clock controller bindings and add them
later on and add the sysctrl bindings in one step.

Neil

> 
>> +
>>         required:
>>           - power-controller
>>   
>> @@ -53,6 +57,10 @@ allOf:
>>               - amlogic,meson-gx-ao-sysctrl
>>               - amlogic,meson-axg-ao-sysctrl
>>       then:
>> +      properties:
>> +        clock-controller:
>> +          $ref: /schemas/clock/amlogic,gxbb-aoclkc.yaml#
>> +
>>         required:
>>           - pinctrl
>>   
>> @@ -81,7 +89,12 @@ examples:
>>           compatible = "amlogic,meson-gx-hhi-sysctrl", "simple-mfd", "syscon";
>>           reg = <0 0x400>;
>>   
>> -        clock-controller { };
>> +        clock-controller {
>> +            compatible = "amlogic,gxbb-clkc";
>> +            #clock-cells = <1>;
>> +            clocks = <&xtal>;
>> +            clock-names = "xtal";
> 
> 
> Best regards,
> Krzysztof
>