| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/pci/toshiba,tc9563.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Toshiba TC9563 PCIe switch |
| |
| maintainers: |
| - Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> |
| |
| description: | |
| Toshiba TC9563 PCIe switch has one upstream and three downstream ports. |
| The 3rd downstream port has integrated endpoint device of Ethernet MAC. |
| Other two downstream ports are supposed to connect to external device. |
| |
| The TC9563 PCIe switch can be configured through I2C interface before |
| PCIe link is established to change FTS, ASPM related entry delays, |
| tx amplitude etc for better power efficiency and functionality. |
| |
| properties: |
| compatible: |
| enum: |
| - pci1179,0623 |
| |
| reg: |
| maxItems: 1 |
| |
| resx-gpios: |
| maxItems: 1 |
| description: |
| GPIO controlling the RESX# pin. |
| |
| vdd18-supply: true |
| |
| vdd09-supply: true |
| |
| vddc-supply: true |
| |
| vddio1-supply: true |
| |
| vddio2-supply: true |
| |
| vddio18-supply: true |
| |
| i2c-parent: |
| $ref: /schemas/types.yaml#/definitions/phandle-array |
| description: |
| A phandle to the parent I2C node and the slave address of the device |
| used to configure tc9563 to change FTS, tx amplitude etc. |
| items: |
| - description: Phandle to the I2C controller node |
| - description: I2C slave address |
| |
| patternProperties: |
| "^pcie@[1-3],0$": |
| description: |
| child nodes describing the internal downstream ports of |
| the tc9563 switch. |
| type: object |
| allOf: |
| - $ref: "#/$defs/tc9563-node" |
| - $ref: /schemas/pci/pci-pci-bridge.yaml# |
| unevaluatedProperties: false |
| |
| $defs: |
| tc9563-node: |
| type: object |
| |
| properties: |
| toshiba,tx-amplitude-microvolt: |
| description: |
| Change Tx Margin setting for low power consumption. |
| |
| toshiba,no-dfe-support: |
| type: boolean |
| description: |
| Disable DFE (Decision Feedback Equalizer), which mitigates |
| intersymbol interference and some reflections caused by |
| impedance mismatches. |
| |
| required: |
| - resx-gpios |
| - vdd18-supply |
| - vdd09-supply |
| - vddc-supply |
| - vddio1-supply |
| - vddio2-supply |
| - vddio18-supply |
| - i2c-parent |
| |
| allOf: |
| - $ref: "#/$defs/tc9563-node" |
| - $ref: /schemas/pci/pci-bus-common.yaml# |
| |
| unevaluatedProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/gpio/gpio.h> |
| |
| pcie { |
| #address-cells = <3>; |
| #size-cells = <2>; |
| |
| pcie@0 { |
| device_type = "pci"; |
| reg = <0x0 0x0 0x0 0x0 0x0>; |
| |
| #address-cells = <3>; |
| #size-cells = <2>; |
| ranges; |
| bus-range = <0x01 0xff>; |
| |
| pcie@0,0 { |
| compatible = "pci1179,0623"; |
| |
| reg = <0x10000 0x0 0x0 0x0 0x0>; |
| device_type = "pci"; |
| #address-cells = <3>; |
| #size-cells = <2>; |
| ranges; |
| bus-range = <0x02 0xff>; |
| |
| i2c-parent = <&qup_i2c 0x77>; |
| |
| vdd18-supply = <&vdd>; |
| vdd09-supply = <&vdd>; |
| vddc-supply = <&vdd>; |
| vddio1-supply = <&vdd>; |
| vddio2-supply = <&vdd>; |
| vddio18-supply = <&vdd>; |
| |
| resx-gpios = <&gpio 1 GPIO_ACTIVE_LOW>; |
| |
| pcie@1,0 { |
| compatible = "pciclass,0604"; |
| reg = <0x20800 0x0 0x0 0x0 0x0>; |
| #address-cells = <3>; |
| #size-cells = <2>; |
| device_type = "pci"; |
| ranges; |
| bus-range = <0x03 0xff>; |
| |
| toshiba,no-dfe-support; |
| }; |
| |
| pcie@2,0 { |
| compatible = "pciclass,0604"; |
| reg = <0x21000 0x0 0x0 0x0 0x0>; |
| #address-cells = <3>; |
| #size-cells = <2>; |
| device_type = "pci"; |
| ranges; |
| bus-range = <0x04 0xff>; |
| }; |
| |
| pcie@3,0 { |
| compatible = "pciclass,0604"; |
| reg = <0x21800 0x0 0x0 0x0 0x0>; |
| #address-cells = <3>; |
| #size-cells = <2>; |
| device_type = "pci"; |
| ranges; |
| bus-range = <0x05 0xff>; |
| |
| toshiba,tx-amplitude-microvolt = <10>; |
| |
| ethernet@0,0 { |
| reg = <0x50000 0x0 0x0 0x0 0x0>; |
| }; |
| |
| ethernet@0,1 { |
| reg = <0x50100 0x0 0x0 0x0 0x0>; |
| }; |
| }; |
| }; |
| }; |
| }; |
