Re: [PATCH v3 08/10] arm64: dts: qcom: sm8450: add PCIe0 RC device

Bjorn Andersson
2021-12-15T22:35:14Z

On Fri 10 Dec 20:17 CST 2021, 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>
> Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@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 */

You need to pad these with a couple more zeros, see 0ac10b291bee
("arm64: dts: qcom: Fix 'interrupt-map' parent address cells")

> +
> + 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>;
> +
> + 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 {

Binding states that the node name needs to have the suffix "-state".

Regards,
Bjorn

> + 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
>