Re: [PATCH V2 5/6] arm64: dts: qcom: ipq5018: Add PCIe related nodes

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

On Tue, Aug 27, 2024 at 10:27:56AM +0530, Sricharan R wrote:
> From: Nitheesh Sekar <quic_nsekar@quicinc.com>
> 
> Add phy and controller nodes for a 2-lane Gen2 and
> 1-lane Gen2 PCIe buses.
> 
> Signed-off-by: Nitheesh Sekar <quic_nsekar@quicinc.com>
> Signed-off-by: Sricharan R <quic_srichara@quicinc.com>
> ---
>  [v2] Removed relocatable flags,  removed assigned-clock-rates,
>       fixed rest of the cosmetic comments.
> 
>  arch/arm64/boot/dts/qcom/ipq5018.dtsi | 168 +++++++++++++++++++++++++-
>  1 file changed, 166 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> index 7e6e2c121979..dd5d6b7ff094 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
> @@ -9,6 +9,7 @@
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/clock/qcom,gcc-ipq5018.h>
>  #include <dt-bindings/reset/qcom,gcc-ipq5018.h>
> +#include <dt-bindings/gpio/gpio.h>
>  
>  / {
>  	interrupt-parent = <&intc>;
> @@ -143,7 +144,33 @@ usbphy0: phy@5b000 {
>  			resets = <&gcc GCC_QUSB2_0_PHY_BCR>;
>  
>  			#phy-cells = <0>;
> +		};
> +
> +		pcie_x1phy: phy@7e000{
> +			compatible = "qcom,ipq5018-uniphy-pcie-gen2x1";
> +			reg = <0x0007e000 0x800>;
> +			#phy-cells = <0>;
> +			#clock-cells = <0>;
> +			clocks = <&gcc GCC_PCIE1_PIPE_CLK>;
> +			clock-names = "pipe";
> +			assigned-clocks = <&gcc GCC_PCIE1_PIPE_CLK>;
> +			resets = <&gcc GCC_PCIE1_PHY_BCR>,
> +				 <&gcc GCC_PCIE1PHY_PHY_BCR>;
> +			reset-names = "phy", "common";
> +			status = "disabled";
> +		};
>  
> +		pcie_x2phy: phy@86000{
> +			compatible = "qcom,ipq5018-uniphy-pcie-gen2x2";
> +			reg = <0x00086000 0x1000>;
> +			#phy-cells = <0>;
> +			#clock-cells = <0>;
> +			clocks = <&gcc GCC_PCIE0_PIPE_CLK>;
> +			clock-names = "pipe";
> +			assigned-clocks = <&gcc GCC_PCIE0_PIPE_CLK>;
> +			resets = <&gcc GCC_PCIE0_PHY_BCR>,
> +				 <&gcc GCC_PCIE0PHY_PHY_BCR>;
> +			reset-names = "phy", "common";
>  			status = "disabled";
>  		};
>  
> @@ -170,8 +197,8 @@ gcc: clock-controller@1800000 {
>  			reg = <0x01800000 0x80000>;
>  			clocks = <&xo_board_clk>,
>  				 <&sleep_clk>,
> -				 <0>,
> -				 <0>,
> +				 <&pcie_x2phy>,
> +				 <&pcie_x1phy>,
>  				 <0>,
>  				 <0>,
>  				 <0>,
> @@ -387,6 +414,143 @@ frame@b128000 {
>  				status = "disabled";
>  			};
>  		};
> +
> +		pcie0: pci@80000000 {

pcie@

> +			compatible = "qcom,pcie-ipq5018";
> +			reg =  <0x80000000 0xf1d>,
> +			       <0x80000f20 0xa8>,
> +			       <0x80001000 0x1000>,
> +			       <0x00078000 0x3000>,
> +			       <0x80100000 0x1000>;

Are you sure that the config space is only 4K?

> +			reg-names = "dbi", "elbi", "atu", "parf", "config";
> +			device_type = "pci";
> +			linux,pci-domain = <0>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <1>;
> +			max-link-speed = <2>;
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			phys = <&pcie_x1phy>;
> +			phy-names ="pciephy";
> +
> +			ranges = <0x01000000 0 0x80200000 0x80200000 0 0x00100000

Please check the value of this field in other SoCs.

> +				  0x02000000 0 0x80300000 0x80300000 0 0x10000000>;
> +
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 0 142 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 2 &intc 0 0 143 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 3 &intc 0 0 144 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 4 &intc 0 0 145 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "global_irq";

I'm pretty sure that this SoC has SPI based MSI interrupts. So they should be
described even though ITS is supported.

> +
> +			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";
> +
> +			msi-map = <0x0 &v2m0 0x0 0xff8>;
> +			status = "disabled";

Please add the rootport node also as like other SoCs.

Above comments applies to below PCIe node.

- Mani

> +		};
> +
> +		pcie1: pci@a0000000 {
> +			compatible = "qcom,pcie-ipq5018";
> +			reg =  <0xa0000000 0xf1d>,
> +			       <0xa0000f20 0xa8>,
> +			       <0xa0001000 0x1000>,
> +			       <0x00080000 0x3000>,
> +			       <0xa0100000 0x1000>;
> +			reg-names = "dbi", "elbi", "atu", "parf", "config";
> +			device_type = "pci";
> +			linux,pci-domain = <1>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <2>;
> +			max-link-speed = <2>;
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			phys = <&pcie_x2phy>;
> +			phy-names ="pciephy";
> +
> +			ranges = <0x01000000 0 0xa0200000 0xa0200000 0 0x00100000
> +				  0x02000000 0 0xa0300000 0xa0300000 0 0x10000000>;
> +
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 0 75 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 2 &intc 0 0 78 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 3 &intc 0 0 79 IRQ_TYPE_LEVEL_HIGH>,
> +					<0 0 0 4 &intc 0 0 83 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "global_irq";
> +
> +			clocks = <&gcc GCC_SYS_NOC_PCIE0_AXI_CLK>,
> +				 <&gcc GCC_PCIE0_AXI_M_CLK>,
> +				 <&gcc GCC_PCIE0_AXI_S_CLK>,
> +				 <&gcc GCC_PCIE0_AHB_CLK>,
> +				 <&gcc GCC_PCIE0_AUX_CLK>,
> +				 <&gcc GCC_PCIE0_AXI_S_BRIDGE_CLK>;
> +
> +			clock-names = "iface",
> +				      "axi_m",
> +				      "axi_s",
> +				      "ahb",
> +				      "aux",
> +				      "axi_bridge";
> +
> +			resets = <&gcc GCC_PCIE0_PIPE_ARES>,
> +				 <&gcc GCC_PCIE0_SLEEP_ARES>,
> +				 <&gcc GCC_PCIE0_CORE_STICKY_ARES>,
> +				 <&gcc GCC_PCIE0_AXI_MASTER_ARES>,
> +				 <&gcc GCC_PCIE0_AXI_SLAVE_ARES>,
> +				 <&gcc GCC_PCIE0_AHB_ARES>,
> +				 <&gcc GCC_PCIE0_AXI_MASTER_STICKY_ARES>,
> +				 <&gcc GCC_PCIE0_AXI_SLAVE_STICKY_ARES>;
> +
> +			reset-names = "pipe",
> +				      "sleep",
> +				      "sticky",
> +				      "axi_m",
> +				      "axi_s",
> +				      "ahb",
> +				      "axi_m_sticky",
> +				      "axi_s_sticky";
> +
> +			msi-map = <0x0 &v2m0 0x0 0xff8>;
> +			status = "disabled";
> +		};
> +
>  	};
>  
>  	timer {
> -- 
> 2.34.1
> 

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