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1Lantiq FALCON pinmux controller2 3Required properties:4- compatible: "lantiq,pinctrl-falcon"5- reg: Should contain the physical address and length of the gpio/pinmux6 register range7 8Please refer to pinctrl-bindings.txt in this directory for details of the9common pinctrl bindings used by client devices, including the meaning of the10phrase "pin configuration node".11 12Lantiq's pin configuration nodes act as a container for an arbitrary number of13subnodes. Each of these subnodes represents some desired configuration for a14pin, a group, or a list of pins or groups. This configuration can include the15mux function to select on those group(s), and two pin configuration parameters:16pull-up and open-drain17 18The name of each subnode is not important as long as it is unique; all subnodes19should be enumerated and processed purely based on their content.20 21Each subnode only affects those parameters that are explicitly listed. In22other words, a subnode that lists a mux function but no pin configuration23parameters implies no information about any pin configuration parameters.24Similarly, a pin subnode that describes a pullup parameter implies no25information about e.g. the mux function.26 27We support 2 types of nodes.28 29Definition of mux function groups:30 31Required 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 the35 group. Valid values for function names are listed below.36 37Valid values for group and function names:38 39 mux groups:40 por, ntr, ntr8k, hrst, mdio, bootled, asc0, spi, spi cs0, spi cs1, i2c,41 jtag, slic, pcm, asc142 43 functions:44 rst, ntr, mdio, led, asc, spi, i2c, jtag, slic, pcm45 46 47Definition of pin configurations:48 49Required subnode-properties:50- lantiq,pins : An array of strings. Each string contains the name of a pin.51 Valid values for these names are listed below.52 53Optional subnode-properties:54- lantiq,pull: Integer, representing the pull-down/up to apply to the pin.55 0: none, 1: down56- lantiq,drive-current: Boolean, enables drive-current57- lantiq,slew-rate: Boolean, enables slew-rate58 59Example:60 pinmux0 {61 compatible = "lantiq,pinctrl-falcon";62 pinctrl-names = "default";63 pinctrl-0 = <&state_default>;64 65 state_default: pinmux {66 asc0 {67 lantiq,groups = "asc0";68 lantiq,function = "asc";69 };70 ntr {71 lantiq,groups = "ntr8k";72 lantiq,function = "ntr";73 };74 i2c {75 lantiq,groups = "i2c";76 lantiq,function = "i2c";77 };78 hrst {79 lantiq,groups = "hrst";80 lantiq,function = "rst";81 };82 };83 };84