From 0ff58575c9d66f660886387c2e68d8c5c724e87b Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Wed, 3 Feb 2016 10:25:36 +0100 Subject: dts: update to v4.5-rc1 Signed-off-by: Sascha Hauer --- .../interrupt-controller/microchip,pic32-evic.txt | 67 ++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 dts/Bindings/interrupt-controller/microchip,pic32-evic.txt (limited to 'dts/Bindings/interrupt-controller/microchip,pic32-evic.txt') diff --git a/dts/Bindings/interrupt-controller/microchip,pic32-evic.txt b/dts/Bindings/interrupt-controller/microchip,pic32-evic.txt new file mode 100644 index 0000000000..c3a1b37c4c --- /dev/null +++ b/dts/Bindings/interrupt-controller/microchip,pic32-evic.txt @@ -0,0 +1,67 @@ +Microchip PIC32 Interrupt Controller +==================================== + +The Microchip PIC32 contains an Enhanced Vectored Interrupt Controller (EVIC). +It handles all internal and external interrupts. This controller exists outside +of the CPU and is the arbitrator of all interrupts (including interrupts from +the CPU itself) before they are presented to the CPU. + +External interrupts have a software configurable edge polarity. Non external +interrupts have a type and polarity that is determined by the source of the +interrupt. + +Required properties +------------------- + +- compatible: Should be "microchip,pic32mzda-evic" +- reg: Specifies physical base address and size of register range. +- interrupt-controller: Identifies the node as an interrupt controller. +- #interrupt cells: Specifies the number of cells used to encode an interrupt + source connected to this controller. The value shall be 2 and interrupt + descriptor shall have the following format: + + + + hw_irq - represents the hardware interrupt number as in the data sheet. + irq_type - is used to describe the type and polarity of an interrupt. For + internal interrupts use IRQ_TYPE_EDGE_RISING for non persistent interrupts and + IRQ_TYPE_LEVEL_HIGH for persistent interrupts. For external interrupts use + IRQ_TYPE_EDGE_RISING or IRQ_TYPE_EDGE_FALLING to select the desired polarity. + +Optional properties +------------------- +- microchip,external-irqs: u32 array of external interrupts with software + polarity configuration. This array corresponds to the bits in the INTCON + SFR. + +Example +------- + +evic: interrupt-controller@1f810000 { + compatible = "microchip,pic32mzda-evic"; + interrupt-controller; + #interrupt-cells = <2>; + reg = <0x1f810000 0x1000>; + microchip,external-irqs = <3 8 13 18 23>; +}; + +Each device/peripheral must request its interrupt line with the associated type +and polarity. + +Internal interrupt DTS snippet +------------------------------ + +device@1f800000 { + ... + interrupts = <113 IRQ_TYPE_LEVEL_HIGH>; + ... +}; + +External interrupt DTS snippet +------------------------------ + +device@1f800000 { + ... + interrupts = <3 IRQ_TYPE_EDGE_RISING>; + ... +}; -- cgit v1.2.3