From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CDC6C5ACCC for ; Thu, 18 Oct 2018 15:41:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08A6221473 for ; Thu, 18 Oct 2018 15:41:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="LXOAB1Oh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 08A6221473 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728537AbeJRXnE (ORCPT ); Thu, 18 Oct 2018 19:43:04 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:47644 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728374AbeJRXmz (ORCPT ); Thu, 18 Oct 2018 19:42:55 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id w9IFetlg097801; Thu, 18 Oct 2018 10:40:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1539877255; bh=KCCpq0mueKDwvAItecz6Q+Xo+JGsHRqRWnYohDtu9SE=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=LXOAB1OhpDJ9vH1SLeI3wAhOv8aiDJzwtOmofNtynG1lBRTMfALEPBKKXZ8WzCcvp BeH4tRSUJA9G7U5x7Ezuau6qDOyMONGkweUNjapsZZD7rRcjwD8zbjdSVClXAU77ix 8XLxdqRH9QQMXhnBMUc8ZYSjSyhGLk/DXcWxe2os= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w9IFes6E002717; Thu, 18 Oct 2018 10:40:54 -0500 Received: from DFLE109.ent.ti.com (10.64.6.30) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Thu, 18 Oct 2018 10:40:54 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Thu, 18 Oct 2018 10:40:54 -0500 Received: from uda0131933.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id w9IFePOl006432; Thu, 18 Oct 2018 10:40:50 -0500 From: Lokesh Vutla To: Nishanth Menon , Santosh Shilimkar , Rob Herring , , , CC: Linux ARM Mailing List , , Tero Kristo , Sekhar Nori , Device Tree Mailing List , Grygorii Strashko , Peter Ujfalusi , Lokesh Vutla Subject: [PATCH v2 06/10] dt-bindings: irqchip: Introduce TISCI Interrupt router bindings Date: Thu, 18 Oct 2018 21:10:13 +0530 Message-ID: <20181018154017.7112-7-lokeshvutla@ti.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181018154017.7112-1-lokeshvutla@ti.com> References: <20181018154017.7112-1-lokeshvutla@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the DT binding documentation for Interrupt router driver. Signed-off-by: Lokesh Vutla --- Changes since v1: - Drop dependency on GIC - Updated supported interrupt types. .../interrupt-controller/ti,sci-intr.txt | 81 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 82 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt new file mode 100644 index 000000000000..276bb4f0ad12 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt @@ -0,0 +1,81 @@ +Texas Instruments K3 Interrupt Router +===================================== + +The Interrupt Router (INTR) module provides a mechanism to mux M +interrupt inputs to N interrupt outputs, where all M inputs are selectable +to be driven per N output. There is one register per output (MUXCNTL_N) that +controls the selection. + + + Interrupt Router + +----------------------+ + | Inputs Outputs | + +-------+ | +------+ | + | GPIO |----------->| | irq0 | | Host IRQ + +-------+ | +------+ | controller + | . +-----+ | +-------+ + +-------+ | . | 0 | |----->| IRQ | + | INTA |----------->| . +-----+ | +-------+ + +-------+ | . . | + | +------+ . | + | | irqM | +-----+ | + | +------+ | N | | + | +-----+ | + +----------------------+ + +Configuration of these MUXCNTL_N registers is done by a system controller +(like the Device Memory and Security Controller on K3 AM654 SoC). System +controller will keep track of the used and unused registers within the Router. +Driver should request the system controller to get the range of GIC IRQs +assigned to the requesting hosts. It is the drivers responsibility to keep +track of Host IRQs. + +Communication between the host processor running an OS and the system +controller happens through a protocol called TI System Control Interface +(TISCI protocol). For more details refer: +Documentation/devicetree/bindings/arm/keystone/ti,sci.txt + +TISCI Interrupt Router Node: +---------------------------- +- compatible: Must be "ti,sci-intr". +- interrupt-controller: Identifies the node as an interrupt controller +- #interrupt-cells: Specifies the number of cells needed to encode an + interrupt source. The value should be 3. + First cell should contain the TISCI device ID of source + Second cell should contain the interrupt source offset + within the device + Third cell specifies the trigger type as defined + in interrupts.txt in this directory. Only level + sensitive trigger types are supported. +- interrupt-parent: phandle of irq parent for TISCI intr. +- ti,sci: Phandle to TI-SCI compatible System controller node. +- ti,sci-dst-id: TISCI device ID of the destination IRQ controller. +- ti,sci-rm-range-girq: TISCI subtype id representing the host irqs assigned + to this interrupt router. + +Example: +-------- +The following example demonstrates both interrupt router node and the consumer +node(main gpio) on the AM654 SoC: + +main_intr: interrupt-controller@1 { + compatible = "ti,sci-intr"; + interrupt-controller; + interrupt-parent = <&gic>; + #interrupt-cells = <3>; + ti,sci = <&dmsc>; + ti,sci-dst-id = <56>; + ti,sci-rm-range-girq = <0x1>; +}; + +main_gpio0: main_gpio0@600000 { + ... + interrupt-parent = <&main_intr>; + interrupts = <57 256 IRQ_TYPE_EDGE_RISING>, + <57 257 IRQ_TYPE_EDGE_RISING>, + <57 258 IRQ_TYPE_EDGE_RISING>, + <57 259 IRQ_TYPE_EDGE_RISING>, + <57 260 IRQ_TYPE_EDGE_RISING>, + <57 261 IRQ_TYPE_EDGE_RISING>; + ... +}; diff --git a/MAINTAINERS b/MAINTAINERS index 06966772cad4..710cf728b9d0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14686,6 +14686,7 @@ F: Documentation/devicetree/bindings/reset/ti,sci-reset.txt F: Documentation/devicetree/bindings/clock/ti,sci-clk.txt F: drivers/clk/keystone/sci-clk.c F: drivers/reset/reset-ti-sci.c +F: Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER M: Hans Verkuil -- 2.19.1