forked from Minki/linux
aeb99c85c1
Add pinctrl and gpio DT bindings for Oxford Semiconductor OXNAS SoC Family. This version supports the ARM926EJ-S based OX810SE SoC with 34 IO pins. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
48 lines
1.4 KiB
Plaintext
48 lines
1.4 KiB
Plaintext
* Oxford Semiconductor OXNAS SoC GPIO Controller
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Please refer to gpio.txt for generic information regarding GPIO bindings.
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Required properties:
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- compatible: "oxsemi,ox810se-gpio"
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- reg: Base address and length for the device.
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- interrupts: The port interrupt shared by all pins.
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- gpio-controller: Marks the port as GPIO controller.
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- #gpio-cells: Two. The first cell is the pin number and
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the second cell is used to specify the gpio polarity as defined in
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defined in <dt-bindings/gpio/gpio.h>:
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0 = GPIO_ACTIVE_HIGH
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1 = GPIO_ACTIVE_LOW
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- interrupt-controller: Marks the device node as an interrupt controller.
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- #interrupt-cells: Two. The first cell is the GPIO number and second cell
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is used to specify the trigger type as defined in
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<dt-bindings/interrupt-controller/irq.h>:
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IRQ_TYPE_EDGE_RISING
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IRQ_TYPE_EDGE_FALLING
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IRQ_TYPE_EDGE_BOTH
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- gpio-ranges: Interaction with the PINCTRL subsystem, it also specifies the
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gpio base and count, should be in the format of numeric-gpio-range as
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specified in the gpio.txt file.
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Example:
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gpio0: gpio@0 {
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compatible = "oxsemi,ox810se-gpio";
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reg = <0x000000 0x100000>;
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interrupts = <21>;
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#gpio-cells = <2>;
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gpio-controller;
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interrupt-controller;
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#interrupt-cells = <2>;
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gpio-ranges = <&pinctrl 0 0 32>;
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};
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keys {
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...
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button-esc {
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label = "ESC";
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linux,code = <1>;
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gpios = <&gpio0 12 0>;
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};
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};
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