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159f8a0209
Add DT bindings for the gpio-rcar driver and read the device configuration from the DT node at probe time if available. Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
* Renesas R-Car GPIO Controller
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Required Properties:
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- compatible: should be 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-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 is used to specify optional parameters as bit flags. Only the GPIO
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active low flag (bit 0) is currently supported.
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- gpio-ranges: Range of pins managed by the GPIO controller as a 4-cells
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tuple using the following syntax.
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<[phandle of the pin controller node]
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0
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[index of the first pin]
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[number of pins]>
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Please refer to gpio.txt in this directory for details of the common GPIO
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bindings used by client devices.
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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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};
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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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};
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