Re: [PATCH v4 8/8] arm64: dts: qcom: ipq9574: add PCIe2 and PCIe3 nodes

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Tue, Apr 30, 2024 at 11:07:50PM -0500, Alexandru Gagniuc wrote:
> On ipq9574, there are 4 PCIe controllers. Describe the pcie2 and pcie3
> nodes, and their PHYs in devicetree.
> 
> The pcie0 and pcie1 controllers use a gen3x1 PHY, which is not
> currently supported. Hence, only pcie2 and pcie3 are described. Only
> pcie2 was tested because my devboard only has conenctions to pcie2.
> 
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
> ---
>  arch/arm64/boot/dts/qcom/ipq9574.dtsi | 178 +++++++++++++++++++++++++-
>  1 file changed, 176 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> index 7f2e5cbf3bbb..c391886cf9ab 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> @@ -300,8 +300,8 @@ gcc: clock-controller@1800000 {
>  				 <0>,
>  				 <0>,
>  				 <0>,
> -				 <0>,
> -				 <0>,
> +				 <&pcie2_phy>,
> +				 <&pcie3_phy>,
>  				 <0>;
>  			#clock-cells = <1>;
>  			#reset-cells = <1>;
> @@ -745,6 +745,180 @@ frame@b128000 {
>  				status = "disabled";
>  			};
>  		};
> +
> +		pcie2_phy: phy@8c000 {
> +			compatible = "qcom,ipq9574-qmp-gen3x2-pcie-phy";
> +			reg = <0x0008c000 0x14f4>;
> +
> +			clocks = <&gcc GCC_PCIE2_AUX_CLK>,
> +				 <&gcc GCC_PCIE2_AHB_CLK>,
> +				 <&gcc GCC_PCIE2_PIPE_CLK>;
> +			clock-names = "aux",
> +				      "cfg_ahb",
> +				      "pipe";
> +
> +			clock-output-names = "pcie_phy2_pipe_clk";
> +			#clock-cells = <0>;
> +			#phy-cells = <0>;
> +
> +			resets = <&gcc GCC_PCIE2_PHY_BCR>,
> +				 <&gcc GCC_PCIE2PHY_PHY_BCR>;
> +			reset-names = "phy",
> +				      "common";
> +			status = "disabled";
> +		};
> +
> +		pcie3_phy: phy@f4000 {
> +			compatible = "qcom,ipq9574-qmp-gen3x2-pcie-phy";
> +			reg = <0x000f4000 0x14f4>;
> +
> +			clocks = <&gcc GCC_PCIE3_AUX_CLK>,
> +				 <&gcc GCC_PCIE3_AHB_CLK>,
> +				 <&gcc GCC_PCIE3_PIPE_CLK>;
> +			clock-names = "aux",
> +				      "cfg_ahb",
> +				      "pipe";
> +
> +			clock-output-names = "pcie_phy3_pipe_clk";
> +			#clock-cells = <0>;
> +			#phy-cells = <0>;
> +
> +			resets = <&gcc GCC_PCIE3_PHY_BCR>,
> +				 <&gcc GCC_PCIE3PHY_PHY_BCR>;
> +			reset-names = "phy",
> +				      "common";
> +			status = "disabled";
> +		};
> +
> +		/* TODO: Populate pcie0/pcie1 when gen3x1 phy support is added. */
> +
> +		pcie2: pcie@20000000 {
> +			compatible = "qcom,pcie-ipq9574";
> +			reg = <0x20000000 0xf1d>,
> +			      <0x20000f20 0xa8>,
> +			      <0x20001000 0x1000>,
> +			      <0x00088000 0x4000>,
> +			      <0x20100000 0x1000>;
> +			reg-names = "dbi", "elbi", "atu", "parf", "config";
> +
> +			ranges = <0x81000000 0x0 0x20200000 0x20200000 0x0 0x00100000>,
> +				 <0x82000000 0x0 0x20300000 0x20300000 0x0 0x07d00000>;

Please cross check 'ranges' property with other platforms.

> +
> +			device_type = "pci";
> +			linux,pci-domain = <3>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <2>;
> +			max-link-speed = <3>;
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			phys = <&pcie2_phy>;
> +			phy-names = "pciephy";
> +
> +			interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "msi";
> +
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 0 164 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 2 &intc 0 0 165 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 3 &intc 0 0 186 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 4 &intc 0 0 187 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			clocks = <&gcc GCC_PCIE2_AXI_M_CLK>,
> +				 <&gcc GCC_PCIE2_AXI_S_CLK>,
> +				 <&gcc GCC_PCIE2_AXI_S_BRIDGE_CLK>,
> +				 <&gcc GCC_ANOC_PCIE2_2LANE_M_CLK>,
> +				 <&gcc GCC_SNOC_PCIE2_2LANE_S_CLK>,
> +				 <&gcc GCC_PCIE2_RCHNG_CLK>;
> +			clock-names = "axi_m",
> +				      "axi_s",
> +				      "axi_bridge",
> +				      "rchng";

Why only 4 clock names?

> +
> +			resets = <&gcc GCC_PCIE2_PIPE_ARES>,
> +				 <&gcc GCC_PCIE2_AUX_ARES>,
> +				 <&gcc GCC_PCIE2_CORE_STICKY_ARES>,
> +				 <&gcc GCC_PCIE2_AXI_M_ARES>,
> +				 <&gcc GCC_PCIE2_AXI_S_ARES>,
> +				 <&gcc GCC_PCIE2_AXI_S_STICKY_ARES>,
> +				 <&gcc GCC_PCIE2_AXI_M_STICKY_ARES>,
> +				 <&gcc GCC_PCIE2_AHB_ARES>;
> +			reset-names = "pipe",
> +				      "aux",
> +				      "sticky",
> +				      "axi_m",
> +				      "axi_s",
> +				      "axi_s_sticky",
> +				      "axi_m_sticky",
> +				      "ahb";
> +			status = "disabled";
> +		};
> +
> +		pcie3: pcie@18000000 {
> +			compatible = "qcom,pcie-ipq9574";
> +			reg = <0x18000000 0xf1d>,
> +			      <0x18000f20 0xa8>,
> +			      <0x18001000 0x1000>,
> +			      <0x000f0000 0x4000>,
> +			      <0x18100000 0x1000>;
> +			reg-names = "dbi", "elbi", "atu", "parf", "config";
> +
> +			ranges = <0x81000000 0x0 0x18200000 0x18200000 0x0 0x00100000>,
> +				 <0x82000000 0x0 0x18300000 0x18300000 0x0 0x07d00000>;
> +
> +			device_type = "pci";
> +			linux,pci-domain = <4>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <2>;
> +			max-link-speed = <3>;
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			phys = <&pcie3_phy>;
> +			phy-names = "pciephy";
> +
> +			interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "msi";
> +
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 0 189 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 2 &intc 0 0 190 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 3 &intc 0 0 192 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 4 &intc 0 0 192 IRQ_TYPE_LEVEL_HIGH>;

Cross check 'interrupt-map' as well.

- Mani

> +
> +			clocks = <&gcc GCC_PCIE3_AXI_M_CLK>,
> +				 <&gcc GCC_PCIE3_AXI_S_CLK>,
> +				 <&gcc GCC_PCIE3_AXI_S_BRIDGE_CLK>,
> +				 <&gcc GCC_ANOC_PCIE3_2LANE_M_CLK>,
> +				 <&gcc GCC_SNOC_PCIE3_2LANE_S_CLK>,
> +				 <&gcc GCC_PCIE3_RCHNG_CLK>;
> +			clock-names = "axi_m",
> +				      "axi_s",
> +				      "axi_bridge",
> +				      "anoc",
> +				      "snoc",
> +				      "rchng";
> +
> +			resets = <&gcc GCC_PCIE3_PIPE_ARES>,
> +				 <&gcc GCC_PCIE3_AUX_ARES>,
> +				 <&gcc GCC_PCIE3_CORE_STICKY_ARES>,
> +				 <&gcc GCC_PCIE3_AXI_M_ARES>,
> +				 <&gcc GCC_PCIE3_AXI_S_ARES>,
> +				 <&gcc GCC_PCIE3_AXI_S_STICKY_ARES>,
> +				 <&gcc GCC_PCIE3_AXI_M_STICKY_ARES>,
> +				 <&gcc GCC_PCIE3_AHB_ARES>;
> +			reset-names = "pipe",
> +				      "aux",
> +				      "sticky",
> +				      "axi_m",
> +				      "axi_s",
> +				      "axi_s_sticky",
> +				      "axi_m_sticky",
> +				      "ahb";
> +			status = "disabled";
> +		};
>  	};
>  
>  	thermal-zones {
> -- 
> 2.40.1
> 
> 

-- 
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