linux-kernel - Re: [PATCH v8 5/5] arm64: dts: qcom: x1e80100: Add support for PCIe3 on x1e80100

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Message-ID: <de5f40ab-90b7-4c75-b981-dd5824650660@quicinc.com>
Date: Tue, 5 Nov 2024 13:28:26 +0800
From: Qiang Yu <quic_qianyu@...cinc.com>
To: Johan Hovold <johan@...nel.org>
CC: <manivannan.sadhasivam@...aro.org>, <vkoul@...nel.org>,
        <kishon@...nel.org>, <robh@...nel.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <mturquette@...libre.com>, <sboyd@...nel.org>, <abel.vesa@...aro.org>,
        <quic_msarkar@...cinc.com>, <quic_devipriy@...cinc.com>,
        <dmitry.baryshkov@...aro.org>, <kw@...ux.com>, <lpieralisi@...nel.org>,
        <neil.armstrong@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <johan+linaro@...nel.org>
Subject: Re: [PATCH v8 5/5] arm64: dts: qcom: x1e80100: Add support for PCIe3
 on x1e80100


On 11/4/2024 10:35 PM, Johan Hovold wrote:
> On Thu, Oct 31, 2024 at 08:09:02PM -0700, Qiang Yu wrote:
>> Describe PCIe3 controller and PHY. Also add required system resources like
>> regulators, clocks, interrupts and registers configuration for PCIe3.
>>
>> Signed-off-by: Qiang Yu <quic_qianyu@...cinc.com>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
>> Reviewed-by: Johan Hovold <johan+linaro@...nel.org>
>   
>> +		pcie3: pcie@...0000 {
>> +			device_type = "pci";
>> +			compatible = "qcom,pcie-x1e80100";
>> +			reg = <0x0 0x01bd0000 0x0 0x3000>,
>> +			      <0x0 0x78000000 0x0 0xf1d>,
>> +			      <0x0 0x78000f40 0x0 0xa8>,
>> +			      <0x0 0x78001000 0x0 0x1000>,
>> +			      <0x0 0x78100000 0x0 0x100000>,
>> +			      <0x0 0x01bd3000 0x0 0x1000>;
>> +			reg-names = "parf",
>> +				    "dbi",
>> +				    "elbi",
>> +				    "atu",
>> +				    "config",
>> +				    "mhi";
>> +			#address-cells = <3>;
>> +			#size-cells = <2>;
>> +			ranges = <0x01000000 0x0 0x00000000 0x0 0x78200000 0x0 0x100000>,
>> +				 <0x02000000 0x0 0x78300000 0x0 0x78300000 0x0 0x3d00000>,
> Can you double check the size here so that it is indeed correct and not
> just copied from the other nodes which initially got it wrong:
>
> 	https://lore.kernel.org/lkml/20240710-topic-barman-v1-1-5f63fca8d0fc@linaro.org/
 From memory maps, region of PCIe3 is 64MB, the size here is correct.

Thanks,
Qiang Yu
>
>> +				 <0x03000000 0x7 0x40000000 0x7 0x40000000 0x0 0x40000000>;
>> +			bus-range = <0x00 0xff>;
>> +			clocks = <&gcc GCC_PCIE_3_AUX_CLK>,
>> +				 <&gcc GCC_PCIE_3_CFG_AHB_CLK>,
>> +				 <&gcc GCC_PCIE_3_MSTR_AXI_CLK>,
>> +				 <&gcc GCC_PCIE_3_SLV_AXI_CLK>,
>> +				 <&gcc GCC_PCIE_3_SLV_Q2A_AXI_CLK>,
>> +				 <&gcc GCC_CFG_NOC_PCIE_ANOC_NORTH_AHB_CLK>,
>> +				 <&gcc GCC_CNOC_PCIE_NORTH_SF_AXI_CLK>;
>> +			clock-names = "aux",
>> +				      "cfg",
>> +				      "bus_master",
>> +				      "bus_slave",
>> +				      "slave_q2a",
>> +				      "noc_aggr",
>> +				      "cnoc_sf_axi";
>> +
>> +			assigned-clocks = <&gcc GCC_PCIE_3_AUX_CLK>;
>> +			assigned-clock-rates = <19200000>;
>> +
>> +			interconnects = <&pcie_south_anoc MASTER_PCIE_3 QCOM_ICC_TAG_ALWAYS
> This should be &pcie_north_anoc
>
>> +					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
>> +					<&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ALWAYS
>> +					 &cnoc_main SLAVE_PCIE_3 QCOM_ICC_TAG_ALWAYS>;
>> +			interconnect-names = "pcie-mem",
>> +					     "cpu-pcie";
> With the above addressed, feel free to keep my Reviewed-by tag.
>
> Johan