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