62 lines
2.2 KiB
Plaintext
62 lines
2.2 KiB
Plaintext
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* Renesas R-Car GPIO Controller
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Required Properties:
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- compatible: should contain one of the following.
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- "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO controller.
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- "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO controller.
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- "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO controller.
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- "renesas,gpio-r8a7791": for R8A7791 (R-Car M2) compatible GPIO controller.
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- "renesas,gpio-rcar": for generic R-Car GPIO controller.
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- reg: Base address and length of each memory resource used by the GPIO
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controller hardware module.
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- interrupt-parent: phandle of the parent interrupt controller.
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- interrupts: Interrupt specifier for the controllers interrupt.
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- gpio-controller: Marks the device node as a gpio controller.
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- #gpio-cells: Should be 2. The first cell is the GPIO number and the second
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cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
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GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
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- gpio-ranges: Range of pins managed by the GPIO controller.
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Optional properties:
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- clocks: Must contain a reference to the functional clock. The property is
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mandatory if the hardware implements a controllable functional clock for
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the GPIO instance.
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Please refer to gpio.txt in this directory for details of gpio-ranges property
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and the common GPIO bindings used by client devices.
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The GPIO controller also acts as an interrupt controller. It uses the default
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two cells specifier as described in Documentation/devicetree/bindings/
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interrupt-controller/interrupts.txt.
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Example: R8A7779 (R-Car H1) GPIO controller nodes
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gpio0: gpio@ffc40000 {
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compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar";
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reg = <0xffc40000 0x2c>;
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interrupt-parent = <&gic>;
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interrupts = <0 141 0x4>;
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#gpio-cells = <2>;
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gpio-controller;
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gpio-ranges = <&pfc 0 0 32>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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...
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gpio6: gpio@ffc46000 {
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compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar";
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reg = <0xffc46000 0x2c>;
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interrupt-parent = <&gic>;
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interrupts = <0 147 0x4>;
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#gpio-cells = <2>;
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gpio-controller;
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gpio-ranges = <&pfc 0 192 9>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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