Kernel-4.18.0-80.el8_cortina,gemini-pinctrl

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";
        };
    };
};

};