Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752637AbbFLCu2 (ORCPT ); Thu, 11 Jun 2015 22:50:28 -0400 Received: from szxga03-in.huawei.com ([119.145.14.66]:57197 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751138AbbFLCuY (ORCPT ); Thu, 11 Jun 2015 22:50:24 -0400 From: Ma Jun To: , , , , , , , , , Subject: [PATCH v2 3/3] dt-binding:Documents the mbigen bindings Date: Fri, 12 Jun 2015 10:49:59 +0800 Message-ID: <1434077399-32200-4-git-send-email-majun258@huawei.com> X-Mailer: git-send-email 1.9.5.msysgit.1 In-Reply-To: <1434077399-32200-1-git-send-email-majun258@huawei.com> References: <1434077399-32200-1-git-send-email-majun258@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.177.236.124] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020202.557A48E5.0003,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 450ae8ed34549ffeaa882d76bb5016cd Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2614 Lines: 82 Add the mbigen msi interrupt controller bindings document Signed-off-by: Ma Jun --- Documentation/devicetree/bindings/arm/mbigen.txt | 59 ++++++++++++++++++++++ 1 files changed, 59 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/mbigen.txt diff --git a/Documentation/devicetree/bindings/arm/mbigen.txt b/Documentation/devicetree/bindings/arm/mbigen.txt new file mode 100644 index 0000000..c7c261b --- /dev/null +++ b/Documentation/devicetree/bindings/arm/mbigen.txt @@ -0,0 +1,59 @@ +Hisilicon mbigen device tree bindings. +======================================= + +Mbigen means: message based interrupt generator. + +MBI is kind of msi interrupt only used on Non-PCI devices. + +To reduce the wired interrupt number connected to GIC, +Hisilicon designed mbigen to collect and generate interrupt. + + +Non-pci devices can connect to mbigen and gnerate the inteerrupt +by wirtting ITS register. + +The mbigen and devices connect to mbigen have the following properties: + + +Mbigen required properties: +------------------------------------------- +-compatible: Should be "hisilicon,mbi-gen" +-msi-parent: should specified the ITS mbigen connected +-interrupt controller: Identifies the node as an interrupt controller +- #interrupt-cells : Specifies the number of cells needed to encode an + interrupt source. The value is 2 for now. + + The 1st cell is the interrupt number(Hwirq).This value depends on + the Soc design. + + The 2nd cell is the interrupt trigger type, encoded as follows: + 1 = edge triggered + 4 = level triggered + +- reg: Specifies the base physical address and size of the ITS + registers. + +Examples: + + mbigen_pa: interrupt-controller@4c030000 { + compatible = "hisilicon,mbi-gen"; + msi-parent = <&its_pa>; + interrupt-controller; + #interrupt-cells = <2>; + reg = <0x4c030000 0x10000>; + }; + +Device connect to mbigen required properties: +---------------------------------------------------- +-interrupt-parent: Specifies the mbigen node which device connected. +-interrupts:specifies the interrupt source.The first cell is hwirq num, the + second number is trigger type. + +Examples: + usb0: ehci@a1000000 { + compatible = "generic-ehci"; + interrupt-parent = <&mbigen_pa>; + reg = <0xa1000000 0x10000>; + interrupts = <20 4>; + }; + -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/