linux-kernel - Re: [PATCH 9/9] clk: qcom: gcc-msm8994: Add a quirk for a different SDCC configuration

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Date:   Wed, 24 Mar 2021 18:12:34 +0100
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Rob Herring <robh@...nel.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, martin.botka@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 9/9] clk: qcom: gcc-msm8994: Add a quirk for a different
 SDCC configuration


On 24.03.2021 18:11, Rob Herring wrote:
> On Sat, Mar 13, 2021 at 03:19:18AM +0100, Konrad Dybcio wrote:
>> Some devices come with a different SDCC clock configuration,
>> account for that.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
>> ---
>>  .../bindings/clock/qcom,gcc-msm8994.yaml         |  4 ++++
>>  drivers/clk/qcom/gcc-msm8994.c                   | 16 ++++++++++++++++
>>  2 files changed, 20 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml
>> index f8067fb1bbd6..9db0800a4ee4 100644
>> --- a/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml
>> +++ b/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml
>> @@ -49,6 +49,10 @@ properties:
>>      description:
>>        Protected clock specifier list as per common clock binding.
>>  
>> +  qcom,sdcc2-clk-src-40mhz:
>> +    description: SDCC2_APPS clock source runs at 40MHz.
>> +    type: boolean
> Why don't you have some input clock you can get the rate from?


This is a SONY-custom hardware change and that's as much information as I can get. Schematics are not available and it's solely based on the downstream kernel source.


Konrad