phy-rockchip-naneng-combphy.yaml (2985B)
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/phy/phy-rockchip-naneng-combphy.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Rockchip SoC Naneng Combo Phy Device Tree Bindings 8 9maintainers: 10 - Heiko Stuebner <heiko@sntech.de> 11 12properties: 13 compatible: 14 enum: 15 - rockchip,rk3568-naneng-combphy 16 17 reg: 18 maxItems: 1 19 20 clocks: 21 items: 22 - description: reference clock 23 - description: apb clock 24 - description: pipe clock 25 26 clock-names: 27 items: 28 - const: ref 29 - const: apb 30 - const: pipe 31 32 resets: 33 items: 34 - description: exclusive PHY reset line 35 36 rockchip,enable-ssc: 37 type: boolean 38 description: 39 The option SSC can be enabled for U3, SATA and PCIE. 40 Most commercially available platforms use SSC to reduce EMI. 41 42 rockchip,ext-refclk: 43 type: boolean 44 description: 45 Many PCIe connections, especially backplane connections, 46 require a synchronous reference clock between the two link partners. 47 To achieve this a common clock source, referred to as REFCLK in 48 the PCI Express Card Electromechanical Specification, 49 should be used by both ends of the PCIe link. 50 In PCIe mode one can choose to use an internal or an external reference 51 clock. 52 By default the internal clock is selected. The PCIe PHY provides a 100MHz 53 differential clock output(optional with SSC) for system applications. 54 When selecting this option an externally 100MHz differential 55 reference clock needs to be provided to the PCIe PHY. 56 57 rockchip,pipe-grf: 58 $ref: /schemas/types.yaml#/definitions/phandle 59 description: 60 Some additional phy settings are accessed through GRF regs. 61 62 rockchip,pipe-phy-grf: 63 $ref: /schemas/types.yaml#/definitions/phandle 64 description: 65 Some additional pipe settings are accessed through GRF regs. 66 67 "#phy-cells": 68 const: 1 69 70required: 71 - compatible 72 - reg 73 - clocks 74 - clock-names 75 - resets 76 - rockchip,pipe-grf 77 - rockchip,pipe-phy-grf 78 - "#phy-cells" 79 80additionalProperties: false 81 82examples: 83 - | 84 #include <dt-bindings/clock/rk3568-cru.h> 85 86 pipegrf: syscon@fdc50000 { 87 compatible = "rockchip,rk3568-pipe-grf", "syscon"; 88 reg = <0xfdc50000 0x1000>; 89 }; 90 91 pipe_phy_grf0: syscon@fdc70000 { 92 compatible = "rockchip,rk3568-pipe-phy-grf", "syscon"; 93 reg = <0xfdc70000 0x1000>; 94 }; 95 96 combphy0: phy@fe820000 { 97 compatible = "rockchip,rk3568-naneng-combphy"; 98 reg = <0xfe820000 0x100>; 99 clocks = <&pmucru CLK_PCIEPHY0_REF>, 100 <&cru PCLK_PIPEPHY0>, 101 <&cru PCLK_PIPE>; 102 clock-names = "ref", "apb", "pipe"; 103 assigned-clocks = <&pmucru CLK_PCIEPHY0_REF>; 104 assigned-clock-rates = <100000000>; 105 resets = <&cru SRST_PIPEPHY0>; 106 rockchip,pipe-grf = <&pipegrf>; 107 rockchip,pipe-phy-grf = <&pipe_phy_grf0>; 108 #phy-cells = <1>; 109 };