Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752081AbdFTOHq (ORCPT ); Tue, 20 Jun 2017 10:07:46 -0400 Received: from mail.free-electrons.com ([62.4.15.54]:54041 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751060AbdFTOHm (ORCPT ); Tue, 20 Jun 2017 10:07:42 -0400 From: Thomas Petazzoni To: Thomas Gleixner , Jason Cooper , Marc Zyngier , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring , Ian Campbell , Pawel Moll , Mark Rutland , Kumar Gala , Andrew Lunn , Sebastian Hesselbarth , Gregory Clement Cc: linux-arm-kernel@lists.infradead.org, Nadav Haklai , Hanna Hawa , Yehuda Yitschak , Antoine Tenart , =?UTF-8?q?Miqu=C3=A8l=20Raynal?= , Thomas Petazzoni Subject: [PATCH v4 2/6] dt-bindings: interrupt-controller: add DT binding for the Marvell ICU Date: Tue, 20 Jun 2017 16:07:18 +0200 Message-Id: <20170620140722.31646-3-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170620140722.31646-1-thomas.petazzoni@free-electrons.com> References: <20170620140722.31646-1-thomas.petazzoni@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2488 Lines: 71 This commit adds the Device Tree binding documentation for the Marvell ICU interrupt controller, which collects wired interrupts from the devices located into the CP110 hardware block of Marvell Armada 7K/8K, and converts them into SPI interrupts in the GIC located in the AP hardware block, using the GICP extension. Signed-off-by: Thomas Petazzoni --- .../bindings/interrupt-controller/marvell,icu.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/marvell,icu.txt diff --git a/Documentation/devicetree/bindings/interrupt-controller/marvell,icu.txt b/Documentation/devicetree/bindings/interrupt-controller/marvell,icu.txt new file mode 100644 index 0000000..aa8bf2e --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/marvell,icu.txt @@ -0,0 +1,51 @@ +Marvell ICU Interrupt Controller +-------------------------------- + +The Marvell ICU (Interrupt Consolidation Unit) controller is +responsible for collecting all wired-interrupt sources in the CP and +communicating them to the GIC in the AP, the unit translates interrupt +requests on input wires to MSG memory mapped transactions to the GIC. + +Required properties: + +- compatible: Should be "marvell,cp110-icu" + +- reg: Should contain ICU registers location and length. + +- #interrupt-cells: Specifies the number of cells needed to encode an + interrupt source. The value shall be 3. + + The 1st cell is the group type of the ICU interrupt. Possible group + types are: + + ICU_GRP_NSR (0x0) : Shared peripheral interrupt, non-secure + ICU_GRP_SR (0x1) : Shared peripheral interrupt, secure + ICU_GRP_SEI (0x4) : System error interrupt + ICU_GRP_REI (0x5) : RAM error interrupt + + The 2nd cell is the index of the interrupt in the ICU unit. + + The 3rd cell is the type of the interrupt. See arm,gic.txt for + details. + +- interrupt-controller: Identifies the node as an interrupt + controller. + +- msi-parent: Should point to the GICP controller, the GIC extension + that allows to trigger interrupts using MSG memory mapped + transactions. + +Example: + +icu: interrupt-controller@1e0000 { + compatible = "marvell,cp110-icu"; + reg = <0x1e0000 0x10>; + #interrupt-cells = <3>; + interrupt-controller; + msi-parent = <&gicp>; +}; + +usb3h0: usb3@500000 { + interrupt-parent = <&icu>; + interrupts = ; +}; -- 2.9.4