GPIO controllers on MPC8xxx SoCs This is for the non-QE/CPM/GUTs GPIO controllers as found on 8349, 8572, 8610 and compatible. Every GPIO controller node must have #gpio-cells property defined, this information will be used to translate gpio-specifiers. See bindings/gpio/gpio.txt for details of how to specify GPIO information for devices. The GPIO module usually is connected to the SoC's internal interrupt controller, see bindings/interrupt-controller/interrupts.txt (the interrupt client nodes section) for details how to specify this GPIO module's interrupt. The GPIO module may serve as another interrupt controller (cascaded to the SoC's internal interrupt controller). See the interrupt controller nodes section in bindings/interrupt-controller/interrupts.txt for details. Required properties: - compatible: "fsl,-gpio" followed by "fsl,mpc8349-gpio" for 83xx, "fsl,mpc8572-gpio" for 85xx, or "fsl,mpc8610-gpio" for 86xx. - #gpio-cells: Should be two. The first cell is the pin number and the second cell is used to specify optional parameters (currently unused). - interrupt-parent: Phandle for the interrupt controller that services interrupts for this device. - interrupts: Interrupt mapping for GPIO IRQ. - gpio-controller: Marks the port as GPIO controller. Optional properties: - interrupt-controller: Empty boolean property which marks the GPIO module as an IRQ controller. - #interrupt-cells: Should be two. Defines the number of integer cells required to specify an interrupt within this interrupt controller. The first cell defines the pin number, the second cell defines additional flags (trigger type, trigger polarity). Note that the available set of trigger conditions supported by the GPIO module depends on the actual SoC. Example of gpio-controller nodes for a MPC8347 SoC: gpio1: gpio-controller@c00 { #gpio-cells = <2>; compatible = "fsl,mpc8347-gpio", "fsl,mpc8349-gpio"; reg = <0xc00 0x100>; interrupt-parent = <&ipic>; interrupts = <74 0x8>; gpio-controller; interrupt-controller; #interrupt-cells = <2>; }; gpio2: gpio-controller@d00 { #gpio-cells = <2>; compatible = "fsl,mpc8347-gpio", "fsl,mpc8349-gpio"; reg = <0xd00 0x100>; interrupt-parent = <&ipic>; interrupts = <75 0x8>; gpio-controller; }; Example of a peripheral using the GPIO module as an IRQ controller: funkyfpga@0 { compatible = "funky-fpga"; ... interrupt-parent = <&gpio1>; interrupts = <4 3>; };