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-Altera GPIO controller bindings
-
-Required properties:
-- compatible:
- - "altr,pio-1.0"
-- reg: Physical base address and length of the controller's registers.
-- #gpio-cells : Should be 2
- - The first cell is the gpio offset number.
- - The second cell is reserved and is currently unused.
-- gpio-controller : Marks the device node as a GPIO controller.
-- interrupt-controller: Mark the device node as an interrupt controller
-- #interrupt-cells : Should be 2. The interrupt type is fixed in the hardware.
- - The first cell is the GPIO offset number within the GPIO controller.
- - The second cell is the interrupt trigger type and level flags.
-- interrupts: Specify the interrupt.
-- altr,interrupt-type: Specifies the interrupt trigger type the GPIO
- hardware is synthesized. This field is required if the Altera GPIO controller
- used has IRQ enabled as the interrupt type is not software controlled,
- but hardware synthesized. Required if GPIO is used as an interrupt
- controller. The value is defined in <dt-bindings/interrupt-controller/irq.h>
- Only the following flags are supported:
- IRQ_TYPE_EDGE_RISING
- IRQ_TYPE_EDGE_FALLING
- IRQ_TYPE_EDGE_BOTH
- IRQ_TYPE_LEVEL_HIGH
-
-Optional properties:
-- altr,ngpio: Width of the GPIO bank. This defines how many pins the
- GPIO device has. Ranges between 1-32. Optional and defaults to 32 if not
- specified.
-
-Example:
-
-gpio_altr: gpio@ff200000 {
- compatible = "altr,pio-1.0";
- reg = <0xff200000 0x10>;
- interrupts = <0 45 4>;
- altr,ngpio = <32>;
- altr,interrupt-type = <IRQ_TYPE_EDGE_RISING>;
- #gpio-cells = <2>;
- gpio-controller;
- #interrupt-cells = <2>;
- interrupt-controller;
-};