linux-kernel - Re: [PATCH v3 5/6] arm64: dts: qcom: ipq5018: Add PCIe related nodes

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Message-ID: <20250318071756.uilfhwfzgr5gds3o@thinkpad>
Date: Tue, 18 Mar 2025 12:47:56 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: George Moussalem <george.moussalem@...look.com>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-phy@...ts.infradead.org,
	andersson@...nel.org, bhelgaas@...gle.com, conor+dt@...nel.org,
	devicetree@...r.kernel.org, dmitry.baryshkov@...aro.org,
	kishon@...nel.org, konradybcio@...nel.org, krzk+dt@...nel.org,
	kw@...ux.com, lpieralisi@...nel.org, p.zabel@...gutronix.de,
	quic_nsekar@...cinc.com, robh@...nel.org, robimarko@...il.com,
	vkoul@...nel.org, quic_srichara@...cinc.com
Subject: Re: [PATCH v3 5/6] arm64: dts: qcom: ipq5018: Add PCIe related nodes

On Wed, Mar 05, 2025 at 05:41:30PM +0400, George Moussalem wrote:
> From: Sricharan Ramabadhran <quic_srichara@...cinc.com>
> 
> From: Nitheesh Sekar <quic_nsekar@...cinc.com>
> 
> Add phy and controller nodes for a 2-lane Gen2 and
> a 1-lane Gen2 PCIe bus. IPQ5018 has 8 MSI SPI interrupts and
> one global interrupt.
> 
> Signed-off-by: Nitheesh Sekar <quic_nsekar@...cinc.com>
> Signed-off-by: Sricharan R <quic_srichara@...cinc.com>
> Signed-off-by: George Moussalem <george.moussalem@...look.com>
> ---
>  arch/arm64/boot/dts/qcom/ipq5018.dtsi | 232 +++++++++++++++++++++++++-
>  1 file changed, 230 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> index 8914f2ef0bc4..301a044bdf6d 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> @@ -147,6 +147,234 @@ usbphy0: phy@...00 {
>  			status = "disabled";
>  		};
>  
> +		pcie1: pcie@...00 {
> +			compatible = "qcom,pcie-ipq5018";
> +			reg = <0x00078000 0x3000>,
> +			      <0x80000000 0xf1d>,
> +			      <0x80000f20 0xa8>,
> +			      <0x80001000 0x1000>,
> +			      <0x80100000 0x1000>;
> +			reg-names = "parf",
> +				    "dbi",
> +				    "elbi",
> +				    "atu",
> +				    "config";
> +			device_type = "pci";
> +			linux,pci-domain = <0>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <1>;
> +			max-link-speed = <2>;

Why do you want to limit link speed?

> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			phys = <&pcie1_phy>;
> +			phy-names ="pciephy";
> +
> +			ranges = <0x81000000 0 0x80200000 0x80200000 0 0x00100000>,	/* I/O */
> +				 <0x82000000 0 0x80300000 0x80300000 0 0x10000000>;	/* MEM */

These ranges are wrong. Please check with other DT files.

Same comments to other instance as well.

> +
> +			msi-map = <0x0 &v2m0 0x0 0xff8>;
> +
> +			interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "msi0",
> +					  "msi1",
> +					  "msi2",
> +					  "msi3",
> +					  "msi4",
> +					  "msi5",
> +					  "msi6",
> +					  "msi7",
> +					  "global";
> +
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 142 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> +					<0 0 0 2 &intc 0 143 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> +					<0 0 0 3 &intc 0 144 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
> +					<0 0 0 4 &intc 0 145 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
> +
> +			clocks = <&gcc GCC_SYS_NOC_PCIE1_AXI_CLK>,
> +				 <&gcc GCC_PCIE1_AXI_M_CLK>,
> +				 <&gcc GCC_PCIE1_AXI_S_CLK>,
> +				 <&gcc GCC_PCIE1_AHB_CLK>,
> +				 <&gcc GCC_PCIE1_AUX_CLK>,
> +				 <&gcc GCC_PCIE1_AXI_S_BRIDGE_CLK>;
> +			clock-names = "iface",
> +				      "axi_m",
> +				      "axi_s",
> +				      "ahb",
> +				      "aux",
> +				      "axi_bridge";
> +
> +			resets = <&gcc GCC_PCIE1_PIPE_ARES>,
> +				 <&gcc GCC_PCIE1_SLEEP_ARES>,
> +				 <&gcc GCC_PCIE1_CORE_STICKY_ARES>,
> +				 <&gcc GCC_PCIE1_AXI_MASTER_ARES>,
> +				 <&gcc GCC_PCIE1_AXI_SLAVE_ARES>,
> +				 <&gcc GCC_PCIE1_AHB_ARES>,
> +				 <&gcc GCC_PCIE1_AXI_MASTER_STICKY_ARES>,
> +				 <&gcc GCC_PCIE1_AXI_SLAVE_STICKY_ARES>;
> +			reset-names = "pipe",
> +				      "sleep",
> +				      "sticky",
> +				      "axi_m",
> +				      "axi_s",
> +				      "ahb",
> +				      "axi_m_sticky",
> +				      "axi_s_sticky";
> +
> +			status = "disabled";
> +
> +			pcie@0 {
> +				device_type = "pci";
> +				reg = <0x0 0x0 0x0 0x0 0x0>;
> +
> +				#address-cells = <3>;
> +				#size-cells = <2>;
> +				ranges;
> +			};
> +		};
> +
> +		pcie1_phy: phy@...00{
> +			compatible = "qcom,ipq5018-uniphy-pcie-phy";
> +			reg = <0x0007e000 0x800>;
> +
> +			clocks = <&gcc GCC_PCIE1_PIPE_CLK>;
> +
> +			resets = <&gcc GCC_PCIE1_PHY_BCR>,
> +				 <&gcc GCC_PCIE1PHY_PHY_BCR>;
> +
> +			#clock-cells = <0>;
> +

Please get rid of these newlines between -cells properties.

- Mani

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