diff options
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r-- | Documentation/devicetree/bindings/net/dsa/ocelot.txt | 116 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/ptp/ptp-idt82p33.yaml | 45 |
2 files changed, 161 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/dsa/ocelot.txt b/Documentation/devicetree/bindings/net/dsa/ocelot.txt new file mode 100644 index 000000000000..66a129fea705 --- /dev/null +++ b/Documentation/devicetree/bindings/net/dsa/ocelot.txt @@ -0,0 +1,116 @@ +Microchip Ocelot switch driver family +===================================== + +Felix +----- + +The VSC9959 core is currently the only switch supported by the driver, and is +found in the NXP LS1028A. It is a PCI device, part of the larger ENETC root +complex. As a result, the ethernet-switch node is a sub-node of the PCIe root +complex node and its "reg" property conforms to the parent node bindings: + +* reg: Specifies PCIe Device Number and Function Number of the endpoint device, + in this case for the Ethernet L2Switch it is PF5 (of device 0, bus 0). + +It does not require a "compatible" string. + +The interrupt line is used to signal availability of PTP TX timestamps and for +TSN frame preemption. + +For the external switch ports, depending on board configuration, "phy-mode" and +"phy-handle" are populated by board specific device tree instances. Ports 4 and +5 are fixed as internal ports in the NXP LS1028A instantiation. + +The CPU port property ("ethernet") configures the feature called "NPI port" in +the Ocelot hardware core. The CPU port in Ocelot is a set of queues, which are +connected, in the Node Processor Interface (NPI) mode, to an Ethernet port. +By default, in fsl-ls1028a.dtsi, the NPI port is assigned to the internal +2.5Gbps port@4, but can be moved to the 1Gbps port@5, depending on the specific +use case. Moving the NPI port to an external switch port is hardware possible, +but there is no platform support for the Linux system on the LS1028A chip to +operate as an entire slave DSA chip. NPI functionality (and therefore DSA +tagging) is supported on a single port at a time. + +Any port can be disabled (and in fsl-ls1028a.dtsi, they are indeed all disabled +by default, and should be enabled on a per-board basis). But if any external +switch port is enabled at all, the ENETC PF2 (enetc_port2) should be enabled as +well, regardless of whether it is configured as the DSA master or not. This is +because the Felix PHYLINK implementation accesses the MAC PCS registers, which +in hardware truly belong to the ENETC port #2 and not to Felix. + +Supported PHY interface types (appropriate SerDes protocol setting changes are +needed in the RCW binary): + +* phy_mode = "internal": on ports 4 and 5 +* phy_mode = "sgmii": on ports 0, 1, 2, 3 +* phy_mode = "qsgmii": on ports 0, 1, 2, 3 +* phy_mode = "usxgmii": on ports 0, 1, 2, 3 +* phy_mode = "2500base-x": on ports 0, 1, 2, 3 + +For the rest of the device tree binding definitions, which are standard DSA and +PCI, refer to the following documents: + +Documentation/devicetree/bindings/net/dsa/dsa.txt +Documentation/devicetree/bindings/pci/pci.txt + +Example: + +&soc { + pcie@1f0000000 { /* Integrated Endpoint Root Complex */ + ethernet-switch@0,5 { + reg = <0x000500 0 0 0 0>; + /* IEP INT_B */ + interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + /* External ports */ + port@0 { + reg = <0>; + label = "swp0"; + }; + + port@1 { + reg = <1>; + label = "swp1"; + }; + + port@2 { + reg = <2>; + label = "swp2"; + }; + + port@3 { + reg = <3>; + label = "swp3"; + }; + + /* Tagging CPU port */ + port@4 { + reg = <4>; + ethernet = <&enetc_port2>; + phy-mode = "internal"; + + fixed-link { + speed = <2500>; + full-duplex; + }; + }; + + /* Non-tagging CPU port */ + port@5 { + reg = <5>; + phy-mode = "internal"; + status = "disabled"; + + fixed-link { + speed = <1000>; + full-duplex; + }; + }; + }; + }; + }; +}; diff --git a/Documentation/devicetree/bindings/ptp/ptp-idt82p33.yaml b/Documentation/devicetree/bindings/ptp/ptp-idt82p33.yaml new file mode 100644 index 000000000000..9bc664f414a1 --- /dev/null +++ b/Documentation/devicetree/bindings/ptp/ptp-idt82p33.yaml @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/ptp/ptp-idt82p33.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: IDT 82P33 PTP Clock Device Tree Bindings + +description: | + IDT 82P33XXX Synchronization Management Unit (SMU) based PTP clock + +maintainers: + - Min Li <min.li.xe@renesas.com> + +properties: + compatible: + enum: + - idt,82p33810 + - idt,82p33813 + - idt,82p33814 + - idt,82p33831 + - idt,82p33910 + - idt,82p33913 + - idt,82p33914 + - idt,82p33931 + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + phc@51 { + compatible = "idt,82p33810"; + reg = <0x51>; + }; + }; |