Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753178AbbKWDSR (ORCPT ); Sun, 22 Nov 2015 22:18:17 -0500 Received: from szxga03-in.huawei.com ([119.145.14.66]:29295 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753063AbbKWDSP (ORCPT ); Sun, 22 Nov 2015 22:18:15 -0500 From: MaJun To: , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v9 1/4] dt-binding:Documents of the mbigen bindings Date: Mon, 23 Nov 2015 11:15:10 +0800 Message-ID: <1448248513-39760-2-git-send-email-majun258@huawei.com> X-Mailer: git-send-email 1.9.5.msysgit.1 In-Reply-To: <1448248513-39760-1-git-send-email-majun258@huawei.com> References: <1448248513-39760-1-git-send-email-majun258@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.177.235.245] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090204.56528509.0146,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: 72e78d6bcbdb0e2c5d283e0fef713ee1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3191 Lines: 97 From: Ma Jun Add the mbigen msi interrupt controller bindings document. This patch based on Mark Rutland's patch https://lkml.org/lkml/2015/7/23/558 Signed-off-by: Ma Jun --- Documentation/devicetree/bindings/arm/mbigen.txt | 69 ++++++++++++++++++++++ 1 files changed, 69 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..8ae59a9 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/mbigen.txt @@ -0,0 +1,69 @@ +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 generate the +interrupt by writing ITS register. + +The mbigen chip and devices connect to mbigen have the following properties: + +Mbigen main node required properties: +------------------------------------------- +- compatible: Should be "hisilicon,mbigen-v2" +- reg: Specifies the base physical address and size of the Mbigen + registers. +- interrupt controller: Identifies the node as an interrupt controller +- msi-parent: This property has two cells. + The 1st cell specifies the ITS this device connected. + The 2nd cell specifies the device id. +- num-msis:Specifies the total number of interrupt this device has. +- #interrupt-cells : Specifies the number of cells needed to encode an + interrupt source. The value must be 2. + + The 1st cell is global hardware pin number of the interrupt. + This value depends on the Soc design. + + The 2nd cell is the interrupt trigger type. + The value of this cell should be: + 1: rising edge triggered + or + 4: high level triggered + +Examples: + + mbigen_device_gmac:intc { + compatible = "hisilicon,mbigen-v2"; + reg = <0x0 0xc0080000 0x0 0x10000>; + interrupt-controller; + msi-parent = <&its_dsa 0x40b1c>; + num-msis = <9>; + #interrupt-cells = <2>; + }; + +Devices connect to mbigen required properties: +---------------------------------------------------- +-interrupt-parent: Specifies the mbigen device node which device connected. +-interrupts:specifies the interrupt source. + The 1st cell is global hardware pin number of the interrupt. + This value depends on the Soc design. + The 2nd cell is the interrupt trigger type(rising edge triggered or high + level triggered) + +Examples: + gmac0: ethernet@c2080000 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0 0xc2080000 0 0x20000>, + <0 0xc0000000 0 0x1000>; + interrupt-parent = <&mbigen_device_gmac>; + interrupts = <656 1>, + <657 1>; + }; + -- 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/