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 };
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