/Documentation/devicetree/bindings/pinctrl/ste,nomadik.txt

  1ST Ericsson Nomadik pinmux controller
  2
  3Required properties:
  4- compatible: "stericsson,nmk-pinctrl", "stericsson,nmk-pinctrl-db8540",
  5              "stericsson,nmk-pinctrl-stn8815"
  6- reg: Should contain the register physical address and length of the PRCMU.
  7
  8Please refer to pinctrl-bindings.txt in this directory for details of the
  9common pinctrl bindings used by client devices, including the meaning of the
 10phrase "pin configuration node".
 11
 12ST Ericsson's pin configuration nodes act as a container for an arbitrary number of
 13subnodes. Each of these subnodes represents some desired configuration for a
 14pin, a group, or a list of pins or groups. This configuration can include the
 15mux function to select on those pin(s)/group(s), and various pin configuration
 16parameters, such as input, output, pull up, pull down...
 17
 18The name of each subnode is not important; all subnodes should be enumerated
 19and processed purely based on their content.
 20
 21Required subnode-properties:
 22- ste,pins : An array of strings. Each string contains the name of a pin or
 23    group.
 24
 25Optional subnode-properties:
 26- ste,function: A string containing the name of the function to mux to the
 27  pin or group.
 28
 29- ste,config: Handle of pin configuration node (e.g. ste,config = <&slpm_in_wkup_pdis>)
 30
 31- ste,input : <0/1/2>
 32	0: input with no pull
 33	1: input with pull up,
 34	2: input with pull down,
 35
 36- ste,output: <0/1/2>
 37	0: output low,
 38	1: output high,
 39	2: output (value is not specified).
 40
 41- ste,sleep: <0/1>
 42	0: sleep mode disable,
 43	1: sleep mode enable.
 44
 45- ste,sleep-input: <0/1/2/3>
 46	0: sleep input with no pull,
 47	1: sleep input with pull up,
 48	2: sleep input with pull down.
 49	3: sleep input and keep last input configuration (no pull, pull up or pull down).
 50
 51- ste,sleep-output: <0/1/2>
 52	0: sleep output low,
 53	1: sleep output high,
 54	2: sleep output (value is not specified).
 55
 56- ste,sleep-gpio: <0/1>
 57	0: disable sleep gpio mode,
 58	1: enable sleep gpio mode.
 59
 60- ste,sleep-wakeup: <0/1>
 61	0: wake-up detection enabled,
 62	1: wake-up detection disabled.
 63
 64- ste,sleep-pull-disable: <0/1>
 65	0: GPIO pull-up or pull-down resistor is enabled, when pin is an input,
 66	1: GPIO pull-up and pull-down resistor are disabled.
 67
 68Example board file extract:
 69
 70	pinctrl@80157000 {
 71		compatible = "stericsson,nmk-pinctrl";
 72		reg = <0x80157000 0x2000>;
 73
 74		pinctrl-names = "default";
 75
 76		slpm_in_wkup_pdis: slpm_in_wkup_pdis {
 77			ste,sleep = <1>;
 78			ste,sleep-input = <3>;
 79			ste,sleep-wakeup = <1>;
 80			ste,sleep-pull-disable = <0>;
 81		};
 82
 83		slpm_out_hi_wkup_pdis: slpm_out_hi_wkup_pdis {
 84			ste,sleep = <1>;
 85			ste,sleep-output = <1>;
 86			ste,sleep-wakeup = <1>;
 87			ste,sleep-pull-disable = <0>;
 88		};
 89
 90		slpm_out_wkup_pdis: slpm_out_wkup_pdis {
 91			ste,sleep = <1>;
 92			ste,sleep-output = <2>;
 93			ste,sleep-wakeup = <1>;
 94			ste,sleep-pull-disable = <0>;
 95		};
 96
 97		uart0 {
 98			uart0_default_mux: uart0_mux {
 99				u0_default_mux {
100					ste,function = "u0";
101					ste,pins = "u0_a_1";
102				};
103			};
104			uart0_default_mode: uart0_default {
105				uart0_default_cfg1 {
106					ste,pins = "GPIO0", "GPIO2";
107					ste,input = <1>;
108				};
109
110				uart0_default_cfg2 {
111					ste,pins = "GPIO1", "GPIO3";
112					ste,output = <1>;
113				};
114			};
115			uart0_sleep_mode: uart0_sleep {
116				uart0_sleep_cfg1 {
117					ste,pins = "GPIO0", "GPIO2";
118					ste,config = <&slpm_in_wkup_pdis>;
119				};
120				uart0_sleep_cfg2 {
121					ste,pins = "GPIO1";
122					ste,config = <&slpm_out_hi_wkup_pdis>;
123				};
124				uart0_sleep_cfg3 {
125					ste,pins = "GPIO3";
126					ste,config = <&slpm_out_wkup_pdis>;
127				};
128			};
129		};
130	};
131
132	uart@80120000 {
133		compatible = "arm,pl011", "arm,primecell";
134		reg = <0x80120000 0x1000>;
135		interrupts = <0 11 0x4>;
136
137		pinctrl-names = "default","sleep";
138		pinctrl-0 = <&uart0_default_mux>, <&uart0_default_mode>;
139		pinctrl-1 = <&uart0_sleep_mode>;
140	};