45 lines · plain
1Altera GPIO controller bindings2 3Required properties:4- compatible:5 - "altr,pio-1.0"6- reg: Physical base address and length of the controller's registers.7- #gpio-cells : Should be 28 - The first cell is the gpio offset number.9 - The second cell is reserved and is currently unused.10- gpio-controller : Marks the device node as a GPIO controller.11- interrupt-controller: Mark the device node as an interrupt controller12- #interrupt-cells : Should be 2. The interrupt type is fixed in the hardware.13 - The first cell is the GPIO offset number within the GPIO controller.14 - The second cell is the interrupt trigger type and level flags.15- interrupts: Specify the interrupt.16- altr,interrupt-type: Specifies the interrupt trigger type the GPIO17 hardware is synthesized. This field is required if the Altera GPIO controller18 used has IRQ enabled as the interrupt type is not software controlled,19 but hardware synthesized. Required if GPIO is used as an interrupt20 controller. The value is defined in <dt-bindings/interrupt-controller/irq.h>21 Only the following flags are supported:22 IRQ_TYPE_EDGE_RISING23 IRQ_TYPE_EDGE_FALLING24 IRQ_TYPE_EDGE_BOTH25 IRQ_TYPE_LEVEL_HIGH26 27Optional properties:28- altr,ngpio: Width of the GPIO bank. This defines how many pins the29 GPIO device has. Ranges between 1-32. Optional and defaults to 32 if not30 specified.31 32Example:33 34gpio_altr: gpio@ff200000 {35 compatible = "altr,pio-1.0";36 reg = <0xff200000 0x10>;37 interrupts = <0 45 4>;38 altr,ngpio = <32>;39 altr,interrupt-type = <IRQ_TYPE_EDGE_RISING>;40 #gpio-cells = <2>;41 gpio-controller;42 #interrupt-cells = <2>;43 interrupt-controller;44};45