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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.
- Optional properties:
- - altr,gpio-bank-width: 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.
- - gpio-bank-name: bank name attached to this device.
- Example:
- user_led_pio_8out: gpio@0x4cc0 {
- compatible = "altr,pio-1.0";
- reg = <0x00004cc0 0x00000010>;
- resetvalue = <255>;
- altr,gpio-bank-width = <8>;
- #gpio-cells = <2>;
- gpio-controller;
- gpio-bank-name = "led";
- };
- In this example, the gpio can be accessed as led[0..7] using gpio command of
- u-boot.
- ==> gpio clear led0
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