1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/pci/baikal,bt1-pcie.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Baikal-T1 PCIe Root Port Controller 8 9maintainers: 10 - Serge Semin <fancer.lancer@gmail.com> 11 12description: 13 Embedded into Baikal-T1 SoC Root Complex controller with a single port 14 activated. It's based on the DWC RC PCIe v4.60a IP-core, which is configured 15 to have just a single Root Port function and is capable of establishing the 16 link up to Gen.3 speed on x4 lanes. It doesn't have embedded clock and reset 17 control module, so the proper interface initialization is supposed to be 18 performed by software. There four in- and four outbound iATU regions 19 which can be used to emit all required TLP types on the PCIe bus. 20 21allOf: 22 - $ref: /schemas/pci/snps,dw-pcie.yaml# 23 24properties: 25 compatible: 26 const: baikal,bt1-pcie 27 28 reg: 29 description: 30 DBI, DBI2 and at least 4KB outbound iATU-capable region for the 31 peripheral devices CFG-space access. 32 maxItems: 3 33 34 reg-names: 35 items: 36 - const: dbi 37 - const: dbi2 38 - const: config 39 40 interrupts: 41 description: 42 MSI, AER, PME, Hot-plug, Link Bandwidth Management, Link Equalization 43 request and eight Read/Write eDMA IRQ lines are available. 44 maxItems: 14 45 46 interrupt-names: 47 items: 48 - const: dma0 49 - const: dma1 50 - const: dma2 51 - const: dma3 52 - const: dma4 53 - const: dma5 54 - const: dma6 55 - const: dma7 56 - const: msi 57 - const: aer 58 - const: pme 59 - const: hp 60 - const: bw_mg 61 - const: l_eq 62 63 clocks: 64 description: 65 DBI (attached to the APB bus), AXI-bus master and slave interfaces 66 are fed up by the dedicated application clocks. A common reference 67 clock signal is supposed to be attached to the corresponding Ref-pad 68 of the SoC. It will be redistributed amongst the controller core 69 sub-modules (pipe, core, aux, etc). 70 maxItems: 4 71 72 clock-names: 73 items: 74 - const: dbi 75 - const: mstr 76 - const: slv 77 - const: ref 78 79 resets: 80 description: 81 A comprehensive controller reset logic is supposed to be implemented 82 by software, so almost all the possible application and core reset 83 signals are exposed via the system CCU module. 84 maxItems: 9 85 86 reset-names: 87 items: 88 - const: mstr 89 - const: slv 90 - const: pwr 91 - const: hot 92 - const: phy 93 - const: core 94 - const: pipe 95 - const: sticky 96 - const: non-sticky 97 98 baikal,bt1-syscon: 99 $ref: /schemas/types.yaml#/definitions/phandle 100 description: 101 Phandle to the Baikal-T1 System Controller DT node. It's required to 102 access some additional PM, Reset-related and LTSSM signals. 103 104 num-lanes: 105 maximum: 4 106 107 max-link-speed: 108 maximum: 3 109 110required: 111 - compatible 112 - reg 113 - reg-names 114 - interrupts 115 - interrupt-names 116 117unevaluatedProperties: false 118 119examples: 120 - | 121 #include <dt-bindings/interrupt-controller/mips-gic.h> 122 #include <dt-bindings/gpio/gpio.h> 123 124 pcie@1f052000 { 125 compatible = "baikal,bt1-pcie"; 126 device_type = "pci"; 127 reg = <0x1f052000 0x1000>, <0x1f053000 0x1000>, <0x1bdbf000 0x1000>; 128 reg-names = "dbi", "dbi2", "config"; 129 #address-cells = <3>; 130 #size-cells = <2>; 131 ranges = <0x81000000 0 0x00000000 0x1bdb0000 0 0x00008000>, 132 <0x82000000 0 0x20000000 0x08000000 0 0x13db0000>; 133 bus-range = <0x0 0xff>; 134 135 interrupts = <GIC_SHARED 80 IRQ_TYPE_LEVEL_HIGH>, 136 <GIC_SHARED 81 IRQ_TYPE_LEVEL_HIGH>, 137 <GIC_SHARED 82 IRQ_TYPE_LEVEL_HIGH>, 138 <GIC_SHARED 83 IRQ_TYPE_LEVEL_HIGH>, 139 <GIC_SHARED 84 IRQ_TYPE_LEVEL_HIGH>, 140 <GIC_SHARED 85 IRQ_TYPE_LEVEL_HIGH>, 141 <GIC_SHARED 86 IRQ_TYPE_LEVEL_HIGH>, 142 <GIC_SHARED 87 IRQ_TYPE_LEVEL_HIGH>, 143 <GIC_SHARED 88 IRQ_TYPE_LEVEL_HIGH>, 144 <GIC_SHARED 89 IRQ_TYPE_LEVEL_HIGH>, 145 <GIC_SHARED 90 IRQ_TYPE_LEVEL_HIGH>, 146 <GIC_SHARED 91 IRQ_TYPE_LEVEL_HIGH>, 147 <GIC_SHARED 92 IRQ_TYPE_LEVEL_HIGH>, 148 <GIC_SHARED 93 IRQ_TYPE_LEVEL_HIGH>; 149 interrupt-names = "dma0", "dma1", "dma2", "dma3", 150 "dma4", "dma5", "dma6", "dma7", 151 "msi", "aer", "pme", "hp", "bw_mg", 152 "l_eq"; 153 154 clocks = <&ccu_sys 1>, <&ccu_axi 6>, <&ccu_axi 7>, <&clk_pcie>; 155 clock-names = "dbi", "mstr", "slv", "ref"; 156 157 resets = <&ccu_axi 6>, <&ccu_axi 7>, <&ccu_sys 7>, <&ccu_sys 10>, 158 <&ccu_sys 4>, <&ccu_sys 6>, <&ccu_sys 5>, <&ccu_sys 8>, 159 <&ccu_sys 9>; 160 reset-names = "mstr", "slv", "pwr", "hot", "phy", "core", "pipe", 161 "sticky", "non-sticky"; 162 163 reset-gpios = <&port0 0 GPIO_ACTIVE_LOW>; 164 165 num-lanes = <4>; 166 max-link-speed = <3>; 167 }; 168... 169