Re: [PATCH v2 08/10] arm64: dts: qcom: sm8450: add PCIe0 RC device

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

On Wed, Dec 08, 2021 at 08:14:40PM +0300, Dmitry Baryshkov wrote:
> Add device tree node for the first PCIe host found on the Qualcomm
> SM8450 platform.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/sm8450.dtsi | 101 +++++++++++++++++++++++++++
>  1 file changed, 101 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index a047d8a22897..09087a34a007 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -627,6 +627,84 @@ i2c14: i2c@a98000 {
>  				#size-cells = <0>;
>  				status = "disabled";
>  			};
> +		];
> +
> +		pcie0: pci@1c00000 {
> +			compatible = "qcom,pcie-sm8450";
> +			reg = <0 0x01c00000 0 0x3000>,
> +			      <0 0x60000000 0 0xf1d>,
> +			      <0 0x60000f20 0 0xa8>,
> +			      <0 0x60001000 0 0x1000>,
> +			      <0 0x60100000 0 0x100000>;
> +			reg-names = "parf", "dbi", "elbi", "atu", "config";
> +			device_type = "pci";
> +			linux,pci-domain = <0>;
> +			bus-range = <0x00 0xff>;
> +			num-lanes = <1>;
> +
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +
> +			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
> +				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
> +
> +			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "msi";
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0x7>;
> +			interrupt-map = <0 0 0 1 &intc 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> +					<0 0 0 2 &intc 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> +					<0 0 0 3 &intc 0 151 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
> +					<0 0 0 4 &intc 0 152 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
> +
> +			clocks = <&gcc GCC_PCIE_0_PIPE_CLK>,
> +				 <&gcc GCC_PCIE_0_PIPE_CLK_SRC>,
> +				 <&pcie0_lane>,
> +				 <&rpmhcc RPMH_CXO_CLK>,
> +				 <&gcc GCC_PCIE_0_AUX_CLK>,
> +				 <&gcc GCC_PCIE_0_CFG_AHB_CLK>,
> +				 <&gcc GCC_PCIE_0_MSTR_AXI_CLK>,
> +				 <&gcc GCC_PCIE_0_SLV_AXI_CLK>,
> +				 <&gcc GCC_PCIE_0_SLV_Q2A_AXI_CLK>,
> +				 <&gcc GCC_DDRSS_PCIE_SF_TBU_CLK>,
> +				 <&gcc GCC_AGGRE_NOC_PCIE_0_AXI_CLK>,
> +				 <&gcc GCC_AGGRE_NOC_PCIE_1_AXI_CLK>;
> +			clock-names = "pipe",
> +				      "pipe_mux",
> +				      "phy_pipe",
> +				      "ref",
> +				      "aux",
> +				      "cfg",
> +				      "bus_master",
> +				      "bus_slave",
> +				      "slave_q2a",
> +				      "ddrss_sf_tbu",
> +				      "aggre0",
> +				      "aggre1";
> +
> +			iommus = <&apps_smmu 0x1c00 0x7f>;
> +			iommu-map = <0x0   &apps_smmu 0x1c00 0x1>,
> +				    <0x100 &apps_smmu 0x1c01 0x1>;
> +
> +			resets = <&gcc GCC_PCIE_0_BCR>;
> +			reset-names = "pci";
> +
> +			power-domains = <&gcc PCIE_0_GDSC>;
> +			power-domain-names = "gdsc";
> +
> +			phys = <&pcie0_lane>;
> +			phy-names = "pciephy";
> +
> +			perst-gpio = <&tlmm 94 GPIO_ACTIVE_LOW>;
> +			enable-gpio = <&tlmm 96 GPIO_ACTIVE_HIGH>;

Wondering if this configuration varies between boards. If then, this should be
moved to board dts. Other than this,

Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thanks,
Mani

> +
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&pcie0_default_state>;
> +
> +			interconnects = <&pcie_noc MASTER_PCIE_0 &mc_virt SLAVE_EBI1>;
> +			interconnect-names = "pci";
> +
> +			status = "disabled";
>  		};
>  
>  		pcie0_phy: phy@1c06000 {
> @@ -763,6 +841,29 @@ tlmm: pinctrl@f100000 {
>  			gpio-ranges = <&tlmm 0 0 211>;
>  			wakeup-parent = <&pdc>;
>  
> +			pcie0_default_state: pcie0-default {
> +				perst {
> +					pins = "gpio94";
> +					function = "gpio";
> +					drive-strength = <2>;
> +					bias-pull-down;
> +				};
> +
> +				clkreq {
> +					pins = "gpio95";
> +					function = "pcie0_clkreqn";
> +					drive-strength = <2>;
> +					bias-pull-up;
> +				};
> +
> +				wake {
> +					pins = "gpio96";
> +					function = "gpio";
> +					drive-strength = <2>;
> +					bias-pull-up;
> +				};
> +			};
> +
>  			qup_i2c13_default_state: qup-i2c13-default-state {
>  				mux {
>  					pins = "gpio48", "gpio49";
> -- 
> 2.33.0
>