linux-kernel - Re: [PATCH v3 3/4] arm64: dts: qcom: add QCS8300 platform

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Message-ID: <4c39e6f8-22d2-4568-9116-01294f85a283@quicinc.com>
Date: Mon, 2 Dec 2024 17:54:44 +0800
From: Xin Liu <quic_liuxin@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Jingyi Wang
	<quic_jingyw@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        "Konrad
 Dybcio" <konradybcio@...nel.org>,
        Rob Herring <robh@...nel.org>,
        "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        "Catalin
 Marinas" <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
CC: <quic_tengfan@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 3/4] arm64: dts: qcom: add QCS8300 platform



在 2024/11/29 4:14, Konrad Dybcio 写道:
> On 28.11.2024 9:44 AM, Jingyi Wang wrote:
>> Add initial DTSI for QCS8300 SoC.
>>
>> Features added in this revision:
>> - CPUs with PSCI idle states
>> - Interrupt-controller with PDC wakeup support
>> - Timers, TCSR Clock Controllers
>> - Reserved Shared memory
>> - GCC and RPMHCC
>> - TLMM
>> - Interconnect
>> - QuP with uart
>> - SMMU
>> - QFPROM
>> - Rpmhpd power controller
>> - UFS
>> - Inter-Processor Communication Controller
>> - SRAM
>> - Remoteprocs including ADSP,CDSP and GPDSP
>> - BWMONs
>>
>> Written with help from Zhenhua Huang(added the smmu node), Xin Liu(added
>> ufs, adsp and gpdsp nodes), Tingguo Cheng(added the rpmhpd node), Kyle
>> Deng(added the aoss_qmp node), Raviteja Laggyshetty(added interconnect
>> nodes) and Cong Zhang(added the INTID of EL2 non-secure physical timer).
>>
>> Signed-off-by: Jingyi Wang <quic_jingyw@...cinc.com>
>> ---
> 
> [...]
> 
>> +		cpu-map {
>> +			cluster0 {
>> +				core0 {
>> +					cpu = <&cpu0>;
>> +				};
>> +
>> +				core1 {
>> +					cpu = <&cpu1>;
>> +				};
>> +
>> +				core2 {
>> +					cpu = <&cpu2>;
>> +				};
>> +
>> +				core3 {
>> +					cpu = <&cpu3>;
>> +				};
>> +
>> +				core4 {
>> +					cpu = <&cpu4>;
>> +				};
> 
> The MPIDR_EL1 register value (CPU node reg) suggests they are not
> part of the same cluster (as you confirmed in the psci idle domains
> description)
> 
> [...]
> 
>> +
>> +		ufs_mem_hc: ufs@...4000 {
>> +			compatible = "qcom,qcs8300-ufshc", "qcom,ufshc", "jedec,ufs-2.0";
>> +			reg = <0x0 0x01d84000 0x0 0x3000>;
>> +			interrupts = <GIC_SPI 265 IRQ_TYPE_LEVEL_HIGH>;
>> +			phys = <&ufs_mem_phy>;
>> +			phy-names = "ufsphy";
>> +			lanes-per-direction = <2>;
>> +			#reset-cells = <1>;
>> +			resets = <&gcc GCC_UFS_PHY_BCR>;
>> +			reset-names = "rst";
>> +
>> +			power-domains = <&gcc GCC_UFS_PHY_GDSC>;
>> +			required-opps = <&rpmhpd_opp_nom>;
>> +
>> +			iommus = <&apps_smmu 0x100 0x0>;
>> +			dma-coherent;
>> +
>> +			interconnects = <&aggre1_noc MASTER_UFS_MEM 0
> 
> QCOM_ICC_TAG_ALWAYS, file-wide
> 
> [...]
> 
>> +		ufs_mem_phy: phy@...7000 {
>> +			compatible = "qcom,qcs8300-qmp-ufs-phy", "qcom,sa8775p-qmp-ufs-phy";
>> +			reg = <0x0 0x01d87000 0x0 0xe10>;
>> +			/*
>> +			 * Yes, GCC_EDP_REF_CLKREF_EN is correct in qref. It
>> +			 * enables the CXO clock to eDP *and* UFS PHY.
>> +			 */
>> +			clocks = <&rpmhcc RPMH_CXO_CLK>,
>> +				 <&gcc GCC_UFS_PHY_PHY_AUX_CLK>,
>> +				 <&gcc GCC_EDP_REF_CLKREF_EN>;
> 
> Are you sure about this, or is this just copypasted from sa8775p?
Thank you for your comments. I confirm with the colleague responsible 
for this area, and configuring the clock this way is correct.
> 
> [...]
> 
>> +
>> +		intc: interrupt-controller@...00000 {
>> +			compatible = "arm,gic-v3";
>> +			reg = <0x0 0x17a00000 0x0 0x10000>,     /* GICD */
>> +			      <0x0 0x17a60000 0x0 0x100000>;    /* GICR * 8 */
> 
> Drop these comments
> 
>> +			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
>> +			#interrupt-cells = <3>;
>> +			interrupt-controller;
>> +			#redistributor-regions = <1>;
>> +			redistributor-stride = <0x0 0x20000>;
>> +		};
>> +
>> +		memtimer: timer@...20000 {
> 
> Unused label
> 
> [...]
> 
>> +	arch_timer: timer {
> 
> Ditto
> 
> Konrad