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Message-ID: <99045d3e-53b4-dd75-fe57-9a3465d49b6c@linaro.org>
Date:   Fri, 1 Sep 2023 10:04:50 +0200
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Subject: Re: [PATCH 2/5] arm64: dts: qcom: apq8096-db820c: drop simple-bus
 from clocks
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To:     Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc:     Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, Stephen Boyd <sboyd@kernel.org>
References: <20230324202244.744271-1-krzysztof.kozlowski@linaro.org>
 <20230324202244.744271-2-krzysztof.kozlowski@linaro.org>
 <CAA8EJprF==p87oN+RiwAiNeURF1JcHGfL2Ez5zxqYPRRbN-hhg@mail.gmail.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <CAA8EJprF==p87oN+RiwAiNeURF1JcHGfL2Ez5zxqYPRRbN-hhg@mail.gmail.com>
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On 31/08/2023 11:04, Dmitry Baryshkov wrote:
> On Fri, 24 Mar 2023 at 22:23, Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org> wrote:
>>
>> 'clocks' node is not a bus, but just a placeholder for clocks:
>>
>>   apq8096-db820c.dtb: clocks: $nodename:0: 'clocks' does not match '^([a-z][a-z0-9\\-]+-bus|bus|localbus|soc|axi|ahb|apb)(@.+)?$'
>>     From schema: dtschema/schemas/simple-bus.yaml
>>   apq8096-db820c.dtb: clocks: xo-board: {'compatible': ['fixed-clock'], '#clock-cells': [[0]],  ...
>>     From schema: dtschema/schemas/simple-bus.yaml
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> 
> This patch broke audio support on DB820c. Now the divclk1 clock is not
> registered, as drivers/clk/clk-gpio.c doesn't have CLK_OF_DECLARE().
> 
> Stephen, What would be the best way to fix this? Add CLK_OF_DECLARE
> support to clk-gpio.c? Or simply move divclk1 from /clocks into a
> separate device?
> 
> What is the rule, which clock drivers must support such device-less
> binding using /clocks/foo nodes?

Uh, sorry for that, I think my patch is incomplete. I did not notice
that not all clocks have CLK_OF_DECLARE. How about moving all the clocks
out of "clocks" node to the root? Then they should be instantiated,
regardless of having CLK_OF_DECLARE.

Best regards,
Krzysztof