device-tree-bindings/pinctrl/st%2Cstm32-pinctrl.txt

5 also provides ability to multiplex and configure the output of various on-chip
10  - compatible: value should be one of the following:
11    (a) "st,stm32f429-pinctrl"
12    (b) "st,stm32f746-pinctrl"
13  - #address-cells: The value of this property must be 1
14  - #size-cells	: The value of this property must be 1
15  - ranges	: defines mapping between pin controller node (parent) to
16    gpio-bank node (children).
17  - pins-are-numbered: Specify the subnodes are using numbered pinmux to
22  - gpio-controller : Indicates this device is a GPIO controller
23  - #gpio-cells	  : Should be two.
26 				- 0 for active high
27 				- 1 for active low
28  - reg		  : The gpio address range, relative to the pinctrl range
29  - clocks	  : clock that drives this bank
30  - st,bank-name	  : Should be a name string for this bank as specified in
34  - reset:	  : Reference to the reset controller
35  - interrupt-parent: phandle of the interrupt parent to which the external
37  - st,syscfg: Should be phandle/offset pair. The phandle to the syscon node
42 #include <dt-bindings/pinctrl/stm32f429-pinfunc.h>
45 	pin-controller {
46 		#address-cells = <1>;
47 		#size-cells = <1>;
48 		compatible = "st,stm32f429-pinctrl";
50 		pins-are-numbered;
53 			gpio-controller;
54 			#gpio-cells = <2>;
57 			st,bank-name = "GPIOA";
60 		pin-functions nodes follow...
64 ----------------------------------
66 A pinctrl node should contain at least one subnode representing the
67 pinctrl group available on the machine. Each subnode will list the
77 - pinmux: integer array, represents gpio pin number and mux setting.
79   dt-bindings/pinctrl/<soc>-pinfunc.h directly.
83     - port: The gpio port index (PA = 0, PB = 1, ..., PK = 11)
84     - line: The line offset within the port (PA0 = 0, PA1 = 1, ..., PA15 = 15)
85     - function: The function number, can be:
96 - GENERIC_PINCONFIG: is the generic pinconfig options to use.
98    - bias-disable,
99    - bias-pull-down,
100    - bias-pull-up,
101    - drive-push-pull,
102    - drive-open-drain,
103    - output-low
104    - output-high
105    - slew-rate = <x>, with x being:
113 pin-controller {
118 			bias-disable;
119 			drive-push-pull;
120 			slew-rate = <0>;
124 			bias-disable;
130 	pinctrl-0 = <&usart1_pins_a>;
131 	pinctrl-names = "default";