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