| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/pci/nvidia,tegra194-pcie-ep.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: NVIDIA Tegra194 (and later) PCIe Endpoint controller (Synopsys DesignWare Core based) |
| |
| maintainers: |
| - Thierry Reding <thierry.reding@gmail.com> |
| - Jon Hunter <jonathanh@nvidia.com> |
| - Vidya Sagar <vidyas@nvidia.com> |
| |
| description: | |
| This PCIe controller is based on the Synopsys DesignWare PCIe IP and thus |
| inherits all the common properties defined in snps,dw-pcie-ep.yaml. Some |
| of the controller instances are dual mode; they can work either in Root |
| Port mode or Endpoint mode but one at a time. |
| |
| On Tegra194, controllers C0, C4 and C5 support Endpoint mode. |
| On Tegra234, controllers C5, C6, C7 and C10 support Endpoint mode. |
| |
| Note: On Tegra194's P2972-0000 platform, only C5 controller can be enabled to |
| operate in the Endpoint mode because of the way the platform is designed. |
| |
| properties: |
| compatible: |
| enum: |
| - nvidia,tegra194-pcie-ep |
| - nvidia,tegra234-pcie-ep |
| |
| reg: |
| items: |
| - description: controller's application logic registers |
| - description: iATU and DMA registers. This is where the iATU (internal |
| Address Translation Unit) registers of the PCIe core are made |
| available for software access. |
| - description: aperture where the Root Port's own configuration |
| registers are available. |
| - description: aperture used to map the remote Root Complex address space |
| |
| reg-names: |
| items: |
| - const: appl |
| - const: atu_dma |
| - const: dbi |
| - const: addr_space |
| |
| interrupts: |
| items: |
| - description: controller interrupt |
| |
| interrupt-names: |
| items: |
| - const: intr |
| |
| clocks: |
| items: |
| - description: module clock |
| |
| clock-names: |
| items: |
| - const: core |
| |
| resets: |
| items: |
| - description: APB bus interface reset |
| - description: module reset |
| |
| reset-names: |
| items: |
| - const: apb |
| - const: core |
| |
| reset-gpios: |
| description: Must contain a phandle to a GPIO controller followed by GPIO |
| that is being used as PERST input signal. Please refer to pci.txt. |
| |
| phys: |
| minItems: 1 |
| maxItems: 8 |
| |
| phy-names: |
| minItems: 1 |
| items: |
| - const: p2u-0 |
| - const: p2u-1 |
| - const: p2u-2 |
| - const: p2u-3 |
| - const: p2u-4 |
| - const: p2u-5 |
| - const: p2u-6 |
| - const: p2u-7 |
| |
| power-domains: |
| maxItems: 1 |
| description: | |
| A phandle to the node that controls power to the respective PCIe |
| controller and a specifier name for the PCIe controller. |
| |
| Tegra194 specifiers are defined in "include/dt-bindings/power/tegra194-powergate.h" |
| Tegra234 specifiers are defined in "include/dt-bindings/power/tegra234-powergate.h" |
| |
| interconnects: |
| items: |
| - description: memory read client |
| - description: memory write client |
| |
| interconnect-names: |
| items: |
| - const: dma-mem # read |
| - const: write |
| |
| dma-coherent: true |
| |
| nvidia,bpmp: |
| $ref: /schemas/types.yaml#/definitions/phandle-array |
| description: | |
| Must contain a pair of phandles to BPMP controller node followed by |
| controller ID. Following are the controller IDs for each controller: |
| |
| Tegra194 |
| |
| 0: C0 |
| 1: C1 |
| 2: C2 |
| 3: C3 |
| 4: C4 |
| 5: C5 |
| |
| Tegra234 |
| |
| 0 : C0 |
| 1 : C1 |
| 2 : C2 |
| 3 : C3 |
| 4 : C4 |
| 5 : C5 |
| 6 : C6 |
| 7 : C7 |
| 8 : C8 |
| 9 : C9 |
| 10: C10 |
| |
| items: |
| - items: |
| - description: phandle to BPMP controller node |
| - description: PCIe controller ID |
| maximum: 10 |
| |
| nvidia,aspm-cmrt-us: |
| description: Common Mode Restore Time for proper operation of ASPM to be |
| specified in microseconds |
| |
| nvidia,aspm-pwr-on-t-us: |
| description: Power On time for proper operation of ASPM to be specified in |
| microseconds |
| |
| nvidia,aspm-l0s-entrance-latency-us: |
| description: ASPM L0s entrance latency to be specified in microseconds |
| |
| vddio-pex-ctl-supply: |
| description: A phandle to the regulator supply for PCIe side band signals |
| |
| nvidia,refclk-select-gpios: |
| maxItems: 1 |
| description: GPIO used to enable REFCLK to controller from the host |
| |
| nvidia,enable-ext-refclk: |
| description: | |
| This boolean property needs to be present if the controller is configured |
| to receive Reference Clock from the host. |
| NOTE: This is applicable only for Tegra234. |
| |
| $ref: /schemas/types.yaml#/definitions/flag |
| |
| nvidia,enable-srns: |
| description: | |
| This boolean property needs to be present if the controller is |
| configured to operate in SRNS (Separate Reference Clocks with No |
| Spread-Spectrum Clocking). NOTE: This is applicable only for |
| Tegra234. |
| |
| $ref: /schemas/types.yaml#/definitions/flag |
| |
| allOf: |
| - $ref: /schemas/pci/snps,dw-pcie-ep.yaml# |
| |
| unevaluatedProperties: false |
| |
| required: |
| - interrupts |
| - interrupt-names |
| - clocks |
| - clock-names |
| - resets |
| - reset-names |
| - power-domains |
| - reset-gpios |
| - vddio-pex-ctl-supply |
| - num-lanes |
| - phys |
| - phy-names |
| - nvidia,bpmp |
| |
| examples: |
| - | |
| #include <dt-bindings/clock/tegra194-clock.h> |
| #include <dt-bindings/gpio/tegra194-gpio.h> |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/power/tegra194-powergate.h> |
| #include <dt-bindings/reset/tegra194-reset.h> |
| |
| bus@0 { |
| #address-cells = <2>; |
| #size-cells = <2>; |
| ranges = <0x0 0x0 0x0 0x8 0x0>; |
| |
| pcie-ep@141a0000 { |
| compatible = "nvidia,tegra194-pcie-ep"; |
| reg = <0x00 0x141a0000 0x0 0x00020000>, /* appl registers (128K) */ |
| <0x00 0x3a040000 0x0 0x00040000>, /* iATU_DMA reg space (256K) */ |
| <0x00 0x3a080000 0x0 0x00040000>, /* DBI reg space (256K) */ |
| <0x1c 0x00000000 0x4 0x00000000>; /* Address Space (16G) */ |
| reg-names = "appl", "atu_dma", "dbi", "addr_space"; |
| interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */ |
| interrupt-names = "intr"; |
| |
| clocks = <&bpmp TEGRA194_CLK_PEX1_CORE_5>; |
| clock-names = "core"; |
| |
| resets = <&bpmp TEGRA194_RESET_PEX1_CORE_5_APB>, |
| <&bpmp TEGRA194_RESET_PEX1_CORE_5>; |
| reset-names = "apb", "core"; |
| |
| power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8A>; |
| pinctrl-names = "default"; |
| pinctrl-0 = <&clkreq_c5_bi_dir_state>; |
| |
| nvidia,bpmp = <&bpmp 5>; |
| |
| nvidia,aspm-cmrt-us = <60>; |
| nvidia,aspm-pwr-on-t-us = <20>; |
| nvidia,aspm-l0s-entrance-latency-us = <3>; |
| |
| vddio-pex-ctl-supply = <&vdd_1v8ao>; |
| |
| reset-gpios = <&gpio TEGRA194_MAIN_GPIO(GG, 1) GPIO_ACTIVE_LOW>; |
| |
| nvidia,refclk-select-gpios = <&gpio_aon TEGRA194_AON_GPIO(AA, 5) |
| GPIO_ACTIVE_HIGH>; |
| |
| num-lanes = <8>; |
| |
| phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>, |
| <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>, |
| <&p2u_nvhs_6>, <&p2u_nvhs_7>; |
| |
| phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4", |
| "p2u-5", "p2u-6", "p2u-7"; |
| }; |
| }; |
| |
| - | |
| #include <dt-bindings/clock/tegra234-clock.h> |
| #include <dt-bindings/gpio/tegra234-gpio.h> |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/power/tegra234-powergate.h> |
| #include <dt-bindings/reset/tegra234-reset.h> |
| |
| bus@0 { |
| #address-cells = <2>; |
| #size-cells = <2>; |
| ranges = <0x0 0x0 0x0 0x8 0x0>; |
| |
| pcie-ep@141a0000 { |
| compatible = "nvidia,tegra234-pcie-ep"; |
| power-domains = <&bpmp TEGRA234_POWER_DOMAIN_PCIEX8A>; |
| reg = <0x00 0x141a0000 0x0 0x00020000>, /* appl registers (128K) */ |
| <0x00 0x3a040000 0x0 0x00040000>, /* iATU_DMA reg space (256K) */ |
| <0x00 0x3a080000 0x0 0x00040000>, /* DBI reg space (256K) */ |
| <0x27 0x40000000 0x4 0x00000000>; /* Address Space (16G) */ |
| reg-names = "appl", "atu_dma", "dbi", "addr_space"; |
| |
| interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */ |
| interrupt-names = "intr"; |
| |
| clocks = <&bpmp TEGRA234_CLK_PEX1_C5_CORE>; |
| clock-names = "core"; |
| |
| resets = <&bpmp TEGRA234_RESET_PEX1_CORE_5_APB>, |
| <&bpmp TEGRA234_RESET_PEX1_CORE_5>; |
| reset-names = "apb", "core"; |
| |
| nvidia,bpmp = <&bpmp 5>; |
| |
| nvidia,enable-ext-refclk; |
| nvidia,aspm-cmrt-us = <60>; |
| nvidia,aspm-pwr-on-t-us = <20>; |
| nvidia,aspm-l0s-entrance-latency-us = <3>; |
| |
| vddio-pex-ctl-supply = <&p3701_vdd_1v8_ls>; |
| |
| reset-gpios = <&gpio TEGRA234_MAIN_GPIO(AF, 1) GPIO_ACTIVE_LOW>; |
| |
| nvidia,refclk-select-gpios = <&gpio_aon |
| TEGRA234_AON_GPIO(AA, 4) |
| GPIO_ACTIVE_HIGH>; |
| |
| num-lanes = <8>; |
| |
| phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>, |
| <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>, |
| <&p2u_nvhs_6>, <&p2u_nvhs_7>; |
| |
| phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4", |
| "p2u-5", "p2u-6", "p2u-7"; |
| }; |
| }; |
