Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt

   1 Cortina Systems Gemini pin controller
   2
   3 This pin controller is found in the Cortina Systems Gemini SoC family,
   4 see further arm/gemini.txt. It is a purely group-based multiplexing pin
   5 controller.
   6
   7 The pin controller node must be a subnode of the system controller node.
   8
   9 Required properties:
  10 - compatible: "cortina,gemini-pinctrl"
  11
  12 Subnodes of the pin controller contain pin control multiplexing set-up
  13 and pin configuration of individual pins.
  14
  15 Please refer to pinctrl-bindings.txt for generic pin multiplexing nodes
  16 and generic pin config nodes.
  17
  18 Supported configurations:
  19 - skew-delay is supported on the Ethernet pins
  20 - drive-strength with 4, 8, 12 or 16 mA as argument is supported for
  21   entire groups on the groups "idegrp", "gmii_gmac0_grp", "gmii_gmac1_grp"
  22   and "pcigrp".
  23
  24 Example:
  25
  26
  27 syscon {
  28         compatible = "cortina,gemini-syscon";
  29         ...
  30         pinctrl {
  31                 compatible = "cortina,gemini-pinctrl";
  32                 pinctrl-names = "default";
  33                 pinctrl-0 = <&dram_default_pins>, <&system_default_pins>,
  34                     <&vcontrol_default_pins>;
  35
  36                 dram_default_pins: pinctrl-dram {
  37                         mux {
  38                                 function = "dram";
  39                                 groups = "dramgrp";
  40                         };
  41                 };
  42                 rtc_default_pins: pinctrl-rtc {
  43                         mux {
  44                                 function = "rtc";
  45                                 groups = "rtcgrp";
  46                         };
  47                 };
  48                 power_default_pins: pinctrl-power {
  49                         mux {
  50                                 function = "power";
  51                                 groups = "powergrp";
  52                         };
  53                 };
  54                 system_default_pins: pinctrl-system {
  55                         mux {
  56                                 function = "system";
  57                                 groups = "systemgrp";
  58                         };
  59                 };
  60                 (...)
  61                 uart_default_pins: pinctrl-uart {
  62                         mux {
  63                                 function = "uart";
  64                                 groups = "uartrxtxgrp";
  65                         };
  66                 };
  67         };
  68 };