Lines Matching +full:gpio +full:- +full:0
2 GPIO configuration.
5 1. Properties for GPIO Controllers
7 1.1 #gpio-cells
9 Property: #gpio-cells
13 Description: The #gpio-cells property defines the number of cells required
14 to encode a gpio specifier.
17 1.2 gpio-controller
19 Property: gpio-controller
23 Description: The presence of a gpio-controller property defines a node as a
24 GPIO controller node.
27 1.3 pin-count
29 Property: pin-count
33 Description: The pin-count property defines the number of GPIO pins.
38 GPIO: gpio@10100 {
39 #gpio-cells = <3>;
40 compatible = "mrvl,gpio";
41 reg = <0x10100 0x20>;
42 gpio-controller;
44 interrupt-parent = <&PIC>;
45 pin-count = <50>
48 2. Properties for GPIO consumer nodes.
54 Value type: <prop-encoded-array> encoded as arbitrary number of GPIO
57 Description: The gpios property of a device node defines the GPIO or GPIOs
59 consists of an arbitrary number of GPIO specifiers.
61 The first cell of the GPIO specifier is phandle of the node's
62 parent GPIO controller and remaining cells are defined by the
63 binding describing the GPIO parent, typically include
67 gpios = <&GPIO 0 1 /* GPIO[0]: FLAGS */
68 &GPIO 1 2>; /* GPIO[1]: FLAGS */
71 3. GPIO controller specifier
76 pin: 0-MAX GPIO pin number.
81 to controller's GPIO reference manual.
83 GPIO_PIN_INPUT 0x0001 Input direction
84 GPIO_PIN_OUTPUT 0x0002 Output direction
85 GPIO_PIN_OPENDRAIN 0x0004 Open-drain output
86 GPIO_PIN_OPENSOURCE 0x0008 Open-source output
87 GPIO_PIN_PUSHPULL 0x0010 Push-pull output
88 GPIO_PIN_TRISTATE 0x0020 Output disabled
89 GPIO_PIN_PULLUP 0x0040 Internal pull-up enabled
90 GPIO_PIN_PULLDOWN 0x0080 Internal pull-down enabled
91 GPIO_PIN_INVIN 0x0100 Invert input
92 GPIO_PIN_INVOUT 0x0200 Invert output
93 GPIO_PIN_PULSATE 0x0400 Pulsate in hardware
94 GPIO_PIN_IRQ_POL_EDG 0x0800 IRQ active single edge
95 GPIO_PIN_IRQ_POL_DBL 0x1000 IRQ active double edge
96 GPIO_PIN_IRQ_POL_LVL 0x2000 IRQ active level
97 GPIO_PIN_IRQ_DEBOUNCE 0x4000 Debounce on IRQ pin
100 gpios = <&GPIO 0 0x00000001 /* GPIO[0]: IN */
101 &GPIO 1 0x00000002 /* GPIO[1]: OUT */
102 &GPIO 2 0x00000801 /* GPIO[2]: IN, IRQ (edge) */
103 &GPIO 3 0x00004001 /* GPIO[3]: IN, IRQ (level) */
105 &GPIO 10 0x00000401>; /* GPIO[10]: OUT, blink */