From e684e258d831781fd89d2047a272fdb0b0ffe7f4 Mon Sep 17 00:00:00 2001 From: Suravee Suthikulpanit Date: Tue, 25 Nov 2014 18:47:23 +0000 Subject: [PATCH] irqchip: gic-v2m: Add DT bindings for GICv2m Update the GIC DT bindings to support GICv2m. Signed-off-by: Suravee Suthikulpanit [maz: split DT patch from main driver, updated changelog] Signed-off-by: Marc Zyngier Link: https://lkml.kernel.org/r/1416941243-7181-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper --- Documentation/devicetree/bindings/arm/gic.txt | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt index c7d2fa156678..375147e5a5fb 100644 --- a/Documentation/devicetree/bindings/arm/gic.txt +++ b/Documentation/devicetree/bindings/arm/gic.txt @@ -96,3 +96,56 @@ Example: <0x2c006000 0x2000>; interrupts = <1 9 0xf04>; }; + + +* GICv2m extension for MSI/MSI-x support (Optional) + +Certain revisions of GIC-400 supports MSI/MSI-x via V2M register frame(s). +This is enabled by specifying v2m sub-node(s). + +Required properties: + +- compatible : The value here should contain "arm,gic-v2m-frame". + +- msi-controller : Identifies the node as an MSI controller. + +- reg : GICv2m MSI interface register base and size + +Optional properties: + +- arm,msi-base-spi : When the MSI_TYPER register contains an incorrect + value, this property should contain the SPI base of + the MSI frame, overriding the HW value. + +- arm,msi-num-spis : When the MSI_TYPER register contains an incorrect + value, this property should contain the number of + SPIs assigned to the frame, overriding the HW value. + +Example: + + interrupt-controller@e1101000 { + compatible = "arm,gic-400"; + #interrupt-cells = <3>; + #address-cells = <2>; + #size-cells = <2>; + interrupt-controller; + interrupts = <1 8 0xf04>; + ranges = <0 0 0 0xe1100000 0 0x100000>; + reg = <0x0 0xe1110000 0 0x01000>, + <0x0 0xe112f000 0 0x02000>, + <0x0 0xe1140000 0 0x10000>, + <0x0 0xe1160000 0 0x10000>; + v2m0: v2m@0x8000 { + compatible = "arm,gic-v2m-frame"; + msi-controller; + reg = <0x0 0x80000 0 0x1000>; + }; + + .... + + v2mN: v2m@0x9000 { + compatible = "arm,gic-v2m-frame"; + msi-controller; + reg = <0x0 0x90000 0 0x1000>; + }; + }; -- 2.39.5