linux-kernel - Re: [PATCH 07/11] ARM: dts: qcom: sdx55: Add support for PCIe RC controller

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Date:   Wed, 22 Feb 2023 17:03:28 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        andersson@...nel.org, lpieralisi@...nel.org, robh@...nel.org,
        kw@...ux.com, krzysztof.kozlowski+dt@...aro.org, vkoul@...nel.org
Cc:     bhelgaas@...gle.com, kishon@...nel.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
Subject: Re: [PATCH 07/11] ARM: dts: qcom: sdx55: Add support for PCIe RC
 controller



On 22.02.2023 16:32, Manivannan Sadhasivam wrote:
> The PCIe controller in SDX55 can act as the RC controller also. Let's
> add support for it.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  arch/arm/boot/dts/qcom-sdx55.dtsi | 72 +++++++++++++++++++++++++++++++
>  1 file changed, 72 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-sdx55.dtsi b/arch/arm/boot/dts/qcom-sdx55.dtsi
> index a1f4a7b0904a..768d7d7f6335 100644
> --- a/arch/arm/boot/dts/qcom-sdx55.dtsi
> +++ b/arch/arm/boot/dts/qcom-sdx55.dtsi
> @@ -303,6 +303,78 @@ qpic_nand: nand-controller@...0000 {
>  			status = "disabled";
>  		};
>  
> +		pcie_rc: pcie@...0000 {
> +			compatible = "qcom,pcie-sdx55";
> +			reg = <0x01c00000 0x3000>,
> +			      <0x40000000 0xf1d>,
> +			      <0x40000f20 0xc8>,
> +			      <0x40001000 0x1000>,
> +			      <0x40100000 0x100000>;
> +			reg-names = "parf", "dbi", "elbi", "atu", "config";
It'd be nice if this and interrupt-names could be turned into
a vertical list of entries, sort of like you have in clock-
names. And it'd be even nicer if you could fix that up in
both PCIe nodes.

Konrad
> +			device_type = "pci";
> +			linux,pci-domain = <0>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <1>;
> +
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			ranges = <0x01000000 0x0 0x40200000 0x40200000 0x0 0x100000>,
> +				 <0x02000000 0x0 0x40300000 0x40300000 0x0 0x3fd00000>;
> +
> +			interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "msi", "msi2", "msi3", "msi4",
> +					  "msi5", "msi6", "msi7", "msi8";
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 0 0 141 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> +					<0 0 0 2 &intc 0 0 0 142 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> +					<0 0 0 3 &intc 0 0 0 143 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
> +					<0 0 0 4 &intc 0 0 0 144 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
> +
> +			clocks = <&gcc GCC_PCIE_PIPE_CLK>,
> +				 <&gcc GCC_PCIE_AUX_CLK>,
> +				 <&gcc GCC_PCIE_CFG_AHB_CLK>,
> +				 <&gcc GCC_PCIE_MSTR_AXI_CLK>,
> +				 <&gcc GCC_PCIE_SLV_AXI_CLK>,
> +				 <&gcc GCC_PCIE_SLV_Q2A_AXI_CLK>,
> +				 <&gcc GCC_PCIE_SLEEP_CLK>;
> +			clock-names = "pipe",
> +				      "aux",
> +				      "cfg",
> +				      "bus_master",
> +				      "bus_slave",
> +				      "slave_q2a",
> +				      "sleep";
> +
> +			assigned-clocks = <&gcc GCC_PCIE_AUX_CLK>;
> +			assigned-clock-rates = <19200000>;
> +
> +			iommus = <&apps_smmu 0x0200 0x0f>;
> +			iommu-map = <0x0   &apps_smmu 0x0200 0x1>,
> +				    <0x100 &apps_smmu 0x0201 0x1>,
> +				    <0x200 &apps_smmu 0x0202 0x1>,
> +				    <0x300 &apps_smmu 0x0203 0x1>,
> +				    <0x400 &apps_smmu 0x0204 0x1>;
> +
> +			resets = <&gcc GCC_PCIE_BCR>;
> +			reset-names = "pci";
> +
> +			power-domains = <&gcc PCIE_GDSC>;
> +
> +			phys = <&pcie_lane>;
> +			phy-names = "pciephy";
> +
> +			status = "disabled";
> +		};
> +
>  		pcie_ep: pcie-ep@...0000 {
>  			compatible = "qcom,sdx55-pcie-ep";
>  			reg = <0x01c00000 0x3000>,