74 lines
1.9 KiB
YAML
74 lines
1.9 KiB
YAML
# 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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$id: http://devicetree.org/schemas/gpio/intel,ixp4xx-gpio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Intel IXP4xx XScale Networking Processors GPIO Controller
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description: |
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This GPIO controller is found in the Intel IXP4xx
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processors. It supports 16 GPIO lines.
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The interrupt portions of the GPIO controller is hierarchical.
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The synchronous edge detector is part of the GPIO block, but the
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actual enabling/disabling of the interrupt line is done in the
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main IXP4xx interrupt controller which has a 1-to-1 mapping for
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the first 12 GPIO lines to 12 system interrupts.
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The remaining 4 GPIO lines can not be used for receiving
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interrupts.
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The interrupt parent of this GPIO controller must be the
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IXP4xx interrupt controller.
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GPIO 14 and 15 can be used as clock outputs rather than GPIO,
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and this can be enabled by a special flag.
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maintainers:
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- Linus Walleij <linus.walleij@linaro.org>
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properties:
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compatible:
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const: intel,ixp4xx-gpio
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reg:
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maxItems: 1
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gpio-controller: true
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"#gpio-cells":
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const: 2
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interrupt-controller: true
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"#interrupt-cells":
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const: 2
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intel,ixp4xx-gpio14-clkout:
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description: If defined, enables clock output on GPIO 14
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instead of GPIO.
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type: boolean
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intel,ixp4xx-gpio15-clkout:
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description: If defined, enables clock output on GPIO 15
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instead of GPIO.
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type: boolean
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required:
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- compatible
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- reg
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- "#gpio-cells"
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- interrupt-controller
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- "#interrupt-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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gpio@c8004000 {
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compatible = "intel,ixp4xx-gpio";
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reg = <0xc8004000 0x1000>;
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gpio-controller;
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#gpio-cells = <2>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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