linux-kernel - Re: [PATCH V7 1/5] dt-bindings: clock: Add "qcom,adsp-pil-mode" property

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Date:   Thu, 11 Aug 2022 16:13:43 +0530
From:   "Satya Priya Kakitapalli (Temp)" <quic_c_skakit@...cinc.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
CC:     Rob Herring <robh@...nel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Andy Gross <agross@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Taniya Das <quic_tdas@...cinc.com>
Subject: Re: [PATCH V7 1/5] dt-bindings: clock: Add "qcom,adsp-pil-mode"
 property


On 8/10/2022 2:49 AM, Bjorn Andersson wrote:
> On Wed 27 Jul 03:27 CDT 2022, Satya Priya wrote:
>
>> The LPASS Peripheral loader clocks would be used to bring
>> LPASS out of reset, when this property is present.
>>
> Can you please elaborate on what you mean here?
>
> When this property is set you assume that remoteproc is used to boot the
> LPASS and therefor some clocks should be handled differently?


Yes, you are right, I'll add this to the description.


> This needs to be written in a way that someone outside of your project
> can understand the purpose.
>
>> This is a cleanup done to handle overlap of regmap of
>> lpasscc and lpass_aon blocks. As a part of this, remove
>> the "cc" regmap from lpasscc node.
>>
> "regmap" is an implementation detail, the binding change should describe
> the changes to the representation of the hardware description.


Okay I'll remove the last part from description while re-posting.


> Thanks,
> Bjorn
>
>> Signed-off-by: Satya Priya <quic_c_skakit@...cinc.com>
>> Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
>> Reviewed-by: Rob Herring <robh@...nel.org>
>> Reviewed-by: Stephen Boyd <sboyd@...nel.org>
>> ---
>>   Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscc.yaml   | 6 ++----
>>   .../devicetree/bindings/clock/qcom,sc7280-lpasscorecc.yaml         | 7 +++++++
>>   2 files changed, 9 insertions(+), 4 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscc.yaml b/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscc.yaml
>> index 47028d7..633887d 100644
>> --- a/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscc.yaml
>> +++ b/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscc.yaml
>> @@ -36,13 +36,11 @@ properties:
>>       items:
>>         - description: LPASS qdsp6ss register
>>         - description: LPASS top-cc register
>> -      - description: LPASS cc register
>>   
>>     reg-names:
>>       items:
>>         - const: qdsp6ss
>>         - const: top_cc
>> -      - const: cc
>>   
>>   required:
>>     - compatible
>> @@ -59,8 +57,8 @@ examples:
>>       #include <dt-bindings/clock/qcom,lpass-sc7280.h>
>>       clock-controller@...0000 {
>>         compatible = "qcom,sc7280-lpasscc";
>> -      reg = <0x03000000 0x40>, <0x03c04000 0x4>, <0x03389000 0x24>;
>> -      reg-names = "qdsp6ss", "top_cc", "cc";
>> +      reg = <0x03000000 0x40>, <0x03c04000 0x4>;
>> +      reg-names = "qdsp6ss", "top_cc";
>>         clocks = <&gcc GCC_CFG_NOC_LPASS_CLK>;
>>         clock-names = "iface";
>>         #clock-cells = <1>;
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscorecc.yaml b/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscorecc.yaml
>> index bad9135..5ccfb24 100644
>> --- a/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscorecc.yaml
>> +++ b/Documentation/devicetree/bindings/clock/qcom,sc7280-lpasscorecc.yaml
>> @@ -41,6 +41,12 @@ properties:
>>     reg:
>>       maxItems: 1
>>   
>> +  qcom,adsp-pil-mode:
>> +    description:
>> +      Indicates if the LPASS would be brought out of reset using
>> +      peripheral loader.
>> +    type: boolean
>> +
>>   required:
>>     - compatible
>>     - reg
>> @@ -165,6 +171,7 @@ examples:
>>         clocks = <&rpmhcc RPMH_CXO_CLK>, <&rpmhcc RPMH_CXO_CLK_A>,
>>                  <&lpasscore LPASS_CORE_CC_CORE_CLK>;
>>         clock-names = "bi_tcxo", "bi_tcxo_ao","iface";
>> +      qcom,adsp-pil-mode;
>>         #clock-cells = <1>;
>>         #power-domain-cells = <1>;
>>       };
>> -- 
>> 2.7.4
>>