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Documentation / devicetree / bindings / pinctrl / lantiq,falcon-pinumx.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	Lantiq FALCON pinmux controller
2	
3	Required properties:
4	- compatible: "lantiq,pinctrl-falcon"
5	- reg: Should contain the physical address and length of the gpio/pinmux
6	  register range
7	
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".
11	
12	Lantiq's pin configuration nodes act as a container for an abitrary 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
17	
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.
20	
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.
26	
27	We support 2 types of nodes.
28	
29	Definition of mux function groups:
30	
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.
36	
37	Valid 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, asc1
42	
43	  functions:
44	    rst, ntr, mdio, led, asc, spi, i2c, jtag, slic, pcm
45	
46	
47	Definition of pin configurations:
48	
49	Required 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	
53	Optional subnode-properties:
54	- lantiq,pull: Integer, representing the pull-down/up to apply to the pin.
55	    0: none, 1: down
56	- lantiq,drive-current: Boolean, enables drive-current
57	- lantiq,slew-rate: Boolean, enables slew-rate
58	
59	Example:
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		};
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