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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/gpio/brcm,brcmstb-gpio.yaml#

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$schema: http://devicetree.org/meta-schemas/core.yaml#

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title: Broadcom STB "UPG GIO" GPIO controller

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description: >

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  The controller's registers are organized as sets of eight 32-bit

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  registers with each set controlling a bank of up to 32 pins.  A single

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  interrupt is shared for all of the banks handled by the controller.

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maintainers:

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  - Doug Berger <opendmb@gmail.com>

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  - Florian Fainelli <f.fainelli@gmail.com>

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properties:

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  compatible:

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    items:

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      - enum:

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          - brcm,bcm7445-gpio

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      - const: brcm,brcmstb-gpio

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  reg:

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    maxItems: 1

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    description: >

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      Define the base and range of the I/O address space containing

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      the brcmstb GPIO controller registers

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  "#gpio-cells":

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    const: 2

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    description: >

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      The first cell is the pin number (within the controller's

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      pin space), and the second is used for the following:

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      bit[0]: polarity (0 for active-high, 1 for active-low)

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  gpio-controller: true

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  brcm,gpio-bank-widths:

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    $ref: /schemas/types.yaml#/definitions/uint32-array

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    description: >

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      Number of GPIO lines for each bank.  Number of elements must

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      correspond to number of banks suggested by the 'reg' property.

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  interrupts:

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    maxItems: 1

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    description: >

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      The interrupt shared by all GPIO lines for this controller.

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  "#interrupt-cells":

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    const: 2

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    description: |

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      The first cell is the GPIO number, the second should specify

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      flags.  The following subset of flags is supported:

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      - bits[3:0] trigger type and level flags

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        1 = low-to-high edge triggered

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        2 = high-to-low edge triggered

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        4 = active high level-sensitive

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        8 = active low level-sensitive

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      Valid combinations are 1, 2, 3, 4, 8.

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  interrupt-controller: true

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  gpio-ranges: true

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  gpio-line-names:

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    minItems: 1

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    maxItems: 128

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  wakeup-source:

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    type: boolean

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    description: >

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      GPIOs for this controller can be used as a wakeup source

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required:

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  - compatible

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  - reg

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  - gpio-controller

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  - "#gpio-cells"

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  - brcm,gpio-bank-widths

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additionalProperties: false

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examples:

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  - |

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    upg_gio: gpio@f040a700 {

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        #gpio-cells = <2>;

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        #interrupt-cells = <2>;

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        compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";

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        gpio-controller;

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        interrupt-controller;

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        reg = <0xf040a700 0x80>;

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        interrupt-parent = <&irq0_intc>;

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        interrupts = <0x6>;

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        brcm,gpio-bank-widths = <32 32 32 24>;

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        gpio-ranges = <&pinctrl 0 0 120>;

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    };

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    upg_gio_aon: gpio@f04172c0 {

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        #gpio-cells = <2>;

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        #interrupt-cells = <2>;

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        compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";

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        gpio-controller;

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        interrupt-controller;

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        reg = <0xf04172c0 0x40>;

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        interrupt-parent = <&irq0_aon_intc>;

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        interrupts = <0x6>;

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        wakeup-source;

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        brcm,gpio-bank-widths = <18 4>;

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    };

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