Lantiq XWAY pinmux controller Required properties: - compatible: "lantiq,pinctrl-xway" or "lantiq,pinctrl-xr9" - reg: Should contain the physical address and length of the gpio/pinmux register range Please refer to pinctrl-bindings.txt in this directory for details of the common pinctrl bindings used by client devices, including the meaning of the phrase "pin configuration node". Lantiq's pin configuration nodes act as a container for an arbitrary number of subnodes. Each of these subnodes represents some desired configuration for a pin, a group, or a list of pins or groups. This configuration can include the mux function to select on those group(s), and two pin configuration parameters: pull-up and open-drain The name of each subnode is not important as long as it is unique; all subnodes should be enumerated and processed purely based on their content. Each subnode only affects those parameters that are explicitly listed. In other words, a subnode that lists a mux function but no pin configuration parameters implies no information about any pin configuration parameters. Similarly, a pin subnode that describes a pullup parameter implies no information about e.g. the mux function. We support 2 types of nodes. Definition of mux function groups: Required subnode-properties: - lantiq,groups : An array of strings. Each string contains the name of a group. Valid values for these names are listed below. - lantiq,function: A string containing the name of the function to mux to the group. Valid values for function names are listed below. Valid values for group and function names: mux groups: exin0, exin1, exin2, jtag, ebu a23, ebu a24, ebu a25, ebu clk, ebu cs1, ebu wait, nand ale, nand cs1, nand cle, spi, spi_cs1, spi_cs2, spi_cs3, spi_cs4, spi_cs5, spi_cs6, asc0, asc0 cts rts, stp, nmi , gpt1, gpt2, gpt3, clkout0, clkout1, clkout2, clkout3, gnt1, gnt2, gnt3, req1, req2, req3 additional mux groups (XR9 only): mdio, nand rdy, nand rd, exin3, exin4, gnt4, req4 functions: spi, asc, cgu, jtag, exin, stp, gpt, nmi, pci, ebu, mdio Definition of pin configurations: Required subnode-properties: - lantiq,pins : An array of strings. Each string contains the name of a pin. Valid values for these names are listed below. Optional subnode-properties: - lantiq,pull: Integer, representing the pull-down/up to apply to the pin. 0: none, 1: down, 2: up. - lantiq,open-drain: Boolean, enables open-drain on the defined pin. Valid values for XWAY pin names: Pinconf pins can be referenced via the names io0-io31. Valid values for XR9 pin names: Pinconf pins can be referenced via the names io0-io55. Example: gpio: pinmux@E100B10 { compatible = "lantiq,pinctrl-xway"; pinctrl-names = "default"; pinctrl-0 = <&state_default>; #gpio-cells = <2>; gpio-controller; reg = <0xE100B10 0xA0>; state_default: pinmux { stp { lantiq,groups = "stp"; lantiq,function = "stp"; }; pci { lantiq,groups = "gnt1"; lantiq,function = "pci"; }; conf_out { lantiq,pins = "io4", "io5", "io6"; /* stp */ lantiq,open-drain; lantiq,pull = <0>; }; }; };