1 Lantiq XWAY pinmux controller
4 - compatible: "lantiq,pinctrl-xway" or "lantiq,pinctrl-xr9"
5 - reg: Should contain the physical address and length of the gpio/pinmux
8 Please refer to pinctrl-bindings.txt in this directory for details of the
9 common pinctrl bindings used by client devices, including the meaning of the
10 phrase "pin configuration node".
12 Lantiq's pin configuration nodes act as a container for an arbitrary number of
13 subnodes. Each of these subnodes represents some desired configuration for a
14 pin, a group, or a list of pins or groups. This configuration can include the
15 mux function to select on those group(s), and two pin configuration parameters:
16 pull-up and open-drain
18 The name of each subnode is not important as long as it is unique; all subnodes
19 should be enumerated and processed purely based on their content.
21 Each subnode only affects those parameters that are explicitly listed. In
22 other words, a subnode that lists a mux function but no pin configuration
23 parameters implies no information about any pin configuration parameters.
24 Similarly, a pin subnode that describes a pullup parameter implies no
25 information about e.g. the mux function.
27 We support 2 types of nodes.
29 Definition of mux function groups:
31 Required subnode-properties:
32 - lantiq,groups : An array of strings. Each string contains the name of a group.
33 Valid values for these names are listed below.
34 - lantiq,function: A string containing the name of the function to mux to the
35 group. Valid values for function names are listed below.
37 Valid values for group and function names:
40 exin0, exin1, exin2, jtag, ebu a23, ebu a24, ebu a25, ebu clk, ebu cs1,
41 ebu wait, nand ale, nand cs1, nand cle, spi, spi_cs1, spi_cs2, spi_cs3,
42 spi_cs4, spi_cs5, spi_cs6, asc0, asc0 cts rts, stp, nmi , gpt1, gpt2,
43 gpt3, clkout0, clkout1, clkout2, clkout3, gnt1, gnt2, gnt3, req1, req2,
46 additional mux groups (XR9 only):
47 mdio, nand rdy, nand rd, exin3, exin4, gnt4, req4
50 spi, asc, cgu, jtag, exin, stp, gpt, nmi, pci, ebu, mdio
54 Definition of pin configurations:
56 Required subnode-properties:
57 - lantiq,pins : An array of strings. Each string contains the name of a pin.
58 Valid values for these names are listed below.
60 Optional subnode-properties:
61 - lantiq,pull: Integer, representing the pull-down/up to apply to the pin.
62 0: none, 1: down, 2: up.
63 - lantiq,open-drain: Boolean, enables open-drain on the defined pin.
65 Valid values for XWAY pin names:
66 Pinconf pins can be referenced via the names io0-io31.
68 Valid values for XR9 pin names:
69 Pinconf pins can be referenced via the names io0-io55.
72 gpio: pinmux@E100B10 {
73 compatible = "lantiq,pinctrl-xway";
74 pinctrl-names = "default";
75 pinctrl-0 = <&state_default>;
79 reg = <0xE100B10 0xA0>;
81 state_default: pinmux {
83 lantiq,groups = "stp";
84 lantiq,function = "stp";
87 lantiq,groups = "gnt1";
88 lantiq,function = "pci";
91 lantiq,pins = "io4", "io5", "io6"; /* stp */