130 lines
2.7 KiB
Plaintext
130 lines
2.7 KiB
Plaintext
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Vitesse VSC73xx Switches
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========================
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This defines device tree bindings for the Vitesse VSC73xx switch chips.
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The Vitesse company has been acquired by Microsemi and Microsemi has
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been acquired Microchip but retains this vendor branding.
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The currently supported switch chips are:
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Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
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Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
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Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
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Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
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This switch could have two different management interface.
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If SPI interface is used, the device tree node is an SPI device so it must
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reside inside a SPI bus device tree node, see spi/spi-bus.txt
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When the chip is connected to a parallel memory bus and work in memory-mapped
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I/O mode, a platform device is used to represent the vsc73xx. In this case it
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must reside inside a platform bus device tree node.
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Required properties:
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- compatible: must be exactly one of:
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"vitesse,vsc7385"
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"vitesse,vsc7388"
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"vitesse,vsc7395"
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"vitesse,vsc7398"
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- gpio-controller: indicates that this switch is also a GPIO controller,
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see gpio/gpio.txt
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- #gpio-cells: this must be set to <2> and indicates that we are a twocell
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GPIO controller, see gpio/gpio.txt
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Optional properties:
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- reset-gpios: a handle to a GPIO line that can issue reset of the chip.
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It should be tagged as active low.
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Required subnodes:
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See net/dsa/dsa.txt for a list of additional required and optional properties
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and subnodes of DSA switches.
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Examples:
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SPI:
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switch@0 {
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compatible = "vitesse,vsc7395";
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reg = <0>;
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/* Specified for 2.5 MHz or below */
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spi-max-frequency = <2500000>;
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gpio-controller;
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#gpio-cells = <2>;
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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label = "lan1";
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};
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port@1 {
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reg = <1>;
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label = "lan2";
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};
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port@2 {
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reg = <2>;
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label = "lan3";
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};
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port@3 {
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reg = <3>;
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label = "lan4";
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};
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vsc: port@6 {
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reg = <6>;
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ethernet = <&gmac1>;
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phy-mode = "rgmii";
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fixed-link {
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speed = <1000>;
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full-duplex;
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pause;
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};
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};
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};
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};
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Platform:
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switch@2,0 {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "vitesse,vsc7385";
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reg = <0x2 0x0 0x20000>;
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reset-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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label = "lan1";
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};
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port@1 {
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reg = <1>;
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label = "lan2";
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};
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port@2 {
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reg = <2>;
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label = "lan3";
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};
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port@3 {
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reg = <3>;
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label = "lan4";
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};
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vsc: port@6 {
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reg = <6>;
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ethernet = <&enet0>;
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phy-mode = "rgmii";
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fixed-link {
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speed = <1000>;
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full-duplex;
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pause;
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};
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};
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};
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};
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