xref: /linux/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml (revision e7d759f31ca295d589f7420719c311870bb3166f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/gpio/brcm,brcmstb-gpio.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Broadcom STB "UPG GIO" GPIO controller
8
9description: >
10  The controller's registers are organized as sets of eight 32-bit
11  registers with each set controlling a bank of up to 32 pins.  A single
12  interrupt is shared for all of the banks handled by the controller.
13
14maintainers:
15  - Doug Berger <opendmb@gmail.com>
16  - Florian Fainelli <f.fainelli@gmail.com>
17
18properties:
19  compatible:
20    items:
21      - enum:
22          - brcm,bcm7445-gpio
23      - const: brcm,brcmstb-gpio
24
25  reg:
26    maxItems: 1
27    description: >
28      Define the base and range of the I/O address space containing
29      the brcmstb GPIO controller registers
30
31  "#gpio-cells":
32    const: 2
33    description: >
34      The first cell is the pin number (within the controller's
35      pin space), and the second is used for the following:
36      bit[0]: polarity (0 for active-high, 1 for active-low)
37
38  gpio-controller: true
39
40  brcm,gpio-bank-widths:
41    $ref: /schemas/types.yaml#/definitions/uint32-array
42    description: >
43      Number of GPIO lines for each bank.  Number of elements must
44      correspond to number of banks suggested by the 'reg' property.
45
46  interrupts:
47    maxItems: 1
48    description: >
49      The interrupt shared by all GPIO lines for this controller.
50
51  "#interrupt-cells":
52    const: 2
53    description: |
54      The first cell is the GPIO number, the second should specify
55      flags.  The following subset of flags is supported:
56      - bits[3:0] trigger type and level flags
57        1 = low-to-high edge triggered
58        2 = high-to-low edge triggered
59        4 = active high level-sensitive
60        8 = active low level-sensitive
61      Valid combinations are 1, 2, 3, 4, 8.
62
63  interrupt-controller: true
64
65  wakeup-source:
66    type: boolean
67    description: >
68      GPIOs for this controller can be used as a wakeup source
69
70required:
71  - compatible
72  - reg
73  - gpio-controller
74  - "#gpio-cells"
75  - brcm,gpio-bank-widths
76
77additionalProperties: false
78
79examples:
80  - |
81    upg_gio: gpio@f040a700 {
82        #gpio-cells = <2>;
83        #interrupt-cells = <2>;
84        compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
85        gpio-controller;
86        interrupt-controller;
87        reg = <0xf040a700 0x80>;
88        interrupt-parent = <&irq0_intc>;
89        interrupts = <0x6>;
90        brcm,gpio-bank-widths = <32 32 32 24>;
91    };
92
93    upg_gio_aon: gpio@f04172c0 {
94        #gpio-cells = <2>;
95        #interrupt-cells = <2>;
96        compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
97        gpio-controller;
98        interrupt-controller;
99        reg = <0xf04172c0 0x40>;
100        interrupt-parent = <&irq0_aon_intc>;
101        interrupts = <0x6>;
102        wakeup-source;
103        brcm,gpio-bank-widths = <18 4>;
104    };
105