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1GPIO controllers on MPC8xxx SoCs2 3This is for the non-QE/CPM/GUTs GPIO controllers as found on48349, 8572, 8610 and compatible.5 6Every GPIO controller node must have #gpio-cells property defined,7this information will be used to translate gpio-specifiers.8See bindings/gpio/gpio.txt for details of how to specify GPIO9information for devices.10 11The GPIO module usually is connected to the SoC's internal interrupt12controller, see bindings/interrupt-controller/interrupts.txt (the13interrupt client nodes section) for details how to specify this GPIO14module's interrupt.15 16The GPIO module may serve as another interrupt controller (cascaded to17the SoC's internal interrupt controller). See the interrupt controller18nodes section in bindings/interrupt-controller/interrupts.txt for19details.20 21Required properties:22- compatible: "fsl,<chip>-gpio" followed by "fsl,mpc8349-gpio"23 for 83xx, "fsl,mpc8572-gpio" for 85xx, or24 "fsl,mpc8610-gpio" for 86xx.25- #gpio-cells: Should be two. The first cell is the pin number26 and the second cell is used to specify optional27 parameters (currently unused).28- interrupts: Interrupt mapping for GPIO IRQ.29- gpio-controller: Marks the port as GPIO controller.30 31Optional properties:32- interrupt-controller: Empty boolean property which marks the GPIO33 module as an IRQ controller.34- #interrupt-cells: Should be two. Defines the number of integer35 cells required to specify an interrupt within36 this interrupt controller. The first cell37 defines the pin number, the second cell38 defines additional flags (trigger type,39 trigger polarity). Note that the available40 set of trigger conditions supported by the41 GPIO module depends on the actual SoC.42 43Example of gpio-controller nodes for a MPC8347 SoC:44 45 gpio1: gpio-controller@c00 {46 #gpio-cells = <2>;47 compatible = "fsl,mpc8347-gpio", "fsl,mpc8349-gpio";48 reg = <0xc00 0x100>;49 interrupt-parent = <&ipic>;50 interrupts = <74 0x8>;51 gpio-controller;52 interrupt-controller;53 #interrupt-cells = <2>;54 };55 56 gpio2: gpio-controller@d00 {57 #gpio-cells = <2>;58 compatible = "fsl,mpc8347-gpio", "fsl,mpc8349-gpio";59 reg = <0xd00 0x100>;60 interrupt-parent = <&ipic>;61 interrupts = <75 0x8>;62 gpio-controller;63 };64 65Example of a peripheral using the GPIO module as an IRQ controller:66 67 funkyfpga@0 {68 compatible = "funky-fpga";69 ...70 interrupt-parent = <&gpio1>;71 interrupts = <4 3>;72 };73