linux-kernel - Re: [PATCH v4 1/3] arm64: dts: qcom: Add interconnect nodes for SDX75

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Message-ID: <6da8dc86-0b9a-488f-9046-9d9d269beeaf@quicinc.com>
Date:   Thu, 12 Oct 2023 22:27:39 +0530
From:   Rohit Agarwal <quic_rohiagar@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <dmitry.baryshkov@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/3] arm64: dts: qcom: Add interconnect nodes for SDX75


On 10/12/2023 10:18 PM, Konrad Dybcio wrote:
>
>
> On 10/4/23 10:08, Rohit Agarwal wrote:
>> Add interconnect nodes to support interconnects on SDX75.
>> Also parallely add the interconnect property for UART required
>> so that the bootup to shell does not break with interconnects
>> in place.
>>
>> Signed-off-by: Rohit Agarwal <quic_rohiagar@...cinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/sdx75.dtsi | 52 
>> +++++++++++++++++++++++++++++++++++++
>>   1 file changed, 52 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sdx75.dtsi 
>> b/arch/arm64/boot/dts/qcom/sdx75.dtsi
>> index e180aa4..b4723fa 100644
>> --- a/arch/arm64/boot/dts/qcom/sdx75.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sdx75.dtsi
>> @@ -8,6 +8,8 @@
>>     #include <dt-bindings/clock/qcom,rpmh.h>
>>   #include <dt-bindings/clock/qcom,sdx75-gcc.h>
>> +#include <dt-bindings/interconnect/qcom,icc.h>
>> +#include <dt-bindings/interconnect/qcom,sdx75.h>
>>   #include <dt-bindings/interrupt-controller/arm-gic.h>
>>   #include <dt-bindings/power/qcom,rpmhpd.h>
>>   #include <dt-bindings/power/qcom-rpmpd.h>
>> @@ -203,6 +205,19 @@
>>           };
>>       };
>>   +    clk_virt: interconnect-0 {
>> +        compatible = "qcom,sdx75-clk-virt";
>> +        #interconnect-cells = <2>;
>> +        qcom,bcm-voters = <&apps_bcm_voter>;
>> +        clocks = <&rpmhcc RPMH_QPIC_CLK>;
>> +    };
>> +
>> +    mc_virt: interconnect-1 {
>> +        compatible = "qcom,sdx75-mc-virt";
>> +        #interconnect-cells = <2>;
>> +        qcom,bcm-voters = <&apps_bcm_voter>;
>> +    };
>> +
>>       memory@...00000 {
>>           device_type = "memory";
>>           reg = <0x0 0x80000000 0x0 0x0>;
>> @@ -434,6 +449,9 @@
>>               clock-names = "m-ahb",
>>                         "s-ahb";
>>               iommus = <&apps_smmu 0xe3 0x0>;
>> +            interconnects = <&clk_virt MASTER_QUP_CORE_0 
>> QCOM_ICC_TAG_ALWAYS
>> +                     &clk_virt SLAVE_QUP_CORE_0 QCOM_ICC_TAG_ALWAYS>;
>> +            interconnect-names = "qup-core";
> No qup-config?
>
> My brain compiler says this would cause a dt checker warning, at least 
> on next-20231012.
If I check the tip, then there is only one interconnect entry.
https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/soc/qcom/qcom%2Cgeni-se.yaml#L50
For the debug uart, the qup-config is added.
I did check the dtbs_check before sending these patches.
Please let me know if I am missing anything.

Thanks,
Rohit.
>
> Konrad