Cortina Systems Gemini pin controller
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This pin controller is found in the Cortina Systems Gemini SoC family,
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see further arm/gemini.txt. It is a purely group-based multiplexing pin
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controller.
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The pin controller node must be a subnode of the system controller node.
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Required properties:
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- compatible: "cortina,gemini-pinctrl"
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Subnodes of the pin controller contain pin control multiplexing set-up
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and pin configuration of individual pins.
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Please refer to pinctrl-bindings.txt for generic pin multiplexing nodes
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and generic pin config nodes.
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Supported configurations:
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- skew-delay is supported on the Ethernet pins
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- drive-strength with 4, 8, 12 or 16 mA as argument is supported for
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entire groups on the groups "idegrp", "gmii_gmac0_grp", "gmii_gmac1_grp"
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and "pcigrp".
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Example:
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syscon {
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compatible = "cortina,gemini-syscon";
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...
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pinctrl {
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compatible = "cortina,gemini-pinctrl";
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pinctrl-names = "default";
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pinctrl-0 = <&dram_default_pins>, <&system_default_pins>,
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<&vcontrol_default_pins>;
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dram_default_pins: pinctrl-dram {
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mux {
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function = "dram";
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groups = "dramgrp";
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};
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};
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rtc_default_pins: pinctrl-rtc {
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mux {
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function = "rtc";
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groups = "rtcgrp";
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};
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};
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power_default_pins: pinctrl-power {
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mux {
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function = "power";
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groups = "powergrp";
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};
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};
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system_default_pins: pinctrl-system {
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mux {
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function = "system";
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groups = "systemgrp";
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};
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};
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(...)
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uart_default_pins: pinctrl-uart {
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mux {
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function = "uart";
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groups = "uartrxtxgrp";
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};
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};
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};
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};
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