From patchwork Sat Oct 6 07:28:11 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lokesh Vutla X-Patchwork-Id: 10629215 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 631DD933 for ; Sat, 6 Oct 2018 07:29:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3FD5429545 for ; Sat, 6 Oct 2018 07:29:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 33B4D29551; Sat, 6 Oct 2018 07:29:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id EB0F429545 for ; Sat, 6 Oct 2018 07:29:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=RRjUjuUm41NMCxX4yc0KqjbpQX0ga5ec1tgvjmjOYGA=; b=FP7MXRgyUJ4Gk4 xdMMQYdJn7BZz3kOLie2+BCV/NKoaDy0JkH7LHKsbti8HMMX3BTBE4/4VCTfzZt0i81HwcBv0FWRq MK+sHMRdLwuElM9a74dFF0l0HJsrPvNEUJTmh8BZxegjWNA0GcBdDhqtj2gTkJMXF44P51lpHW9/Q o23+8v4Q5xlL5XzQcKyqCMQg6SbZ+3W8DmSkbApRcr7cFLyzZbMRRNTtx3CfZem7P1q6wWL0hE7N8 Iyuc1FoXpkCXDHMwUNs7AYAgoQBN1BxelGz0QVKgKIIpIIdeipTg2PnyOhQqLgaplOyCLcgVF2Lia jreTosFD4wqGeeFyH4Yg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1g8h1D-0008By-V4; Sat, 06 Oct 2018 07:28:55 +0000 Received: from lelv0143.ext.ti.com ([198.47.23.248]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g8h19-0008Aq-Bq for linux-arm-kernel@lists.infradead.org; Sat, 06 Oct 2018 07:28:52 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id w967SNG2029126; Sat, 6 Oct 2018 02:28:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1538810903; bh=Q5QrwgguIRoNzmwtHN64jFoD2WrYsTOZoVlTXvAtYt8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ZvewPSce93W/W5C6EhsdDDD9HYr3dIf617EA4aUw4x2yxhy7Z/roqg1Nd3RUlKEFy 7B4vC1aTJaVFhNp23X2uo+t2ywTau0ORIBJB81cjVZVj89eqrNQAfktkrovQ9Qe/jL cpmiwn+Dt78GE+e1B31jyKG8AKer6SoqOqXU4qiQ= Received: from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id w967SNPv013729; Sat, 6 Oct 2018 02:28:23 -0500 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Sat, 6 Oct 2018 02:28:23 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Sat, 6 Oct 2018 02:28:23 -0500 Received: from uda0131933.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id w967SFuD016164; Sat, 6 Oct 2018 02:28:19 -0500 From: Lokesh Vutla To: Nishanth Menon , Tero Kristo , , , Subject: [PATCH 1/2] dt-bindings: irqchip: Introduce TISCI Interrupt router bindings Date: Sat, 6 Oct 2018 12:58:11 +0530 Message-ID: <20181006072812.15814-2-lokeshvutla@ti.com> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20181006072812.15814-1-lokeshvutla@ti.com> References: <20181006072812.15814-1-lokeshvutla@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181006_002851_479969_80471614 X-CRM114-Status: GOOD ( 18.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Device Tree Mailing List , Lokesh Vutla , Sekhar Nori , linux-kernel@vger.kernel.org, Rob Herring , Santosh Shilimkar , Linux ARM Mailing List Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add the DT binding documentation for Interrupt router driver. Signed-off-by: Lokesh Vutla --- .../interrupt-controller/ti,sci-intr.txt | 83 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 84 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..681ca53cc5fb --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt @@ -0,0 +1,83 @@ +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 | |----->| GIC | + | 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 GIC 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. +- interrupt-parent: phandle of irq parent for TISCI intr. The parent must + use the same interrupt-cells format as GIC. +- 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: Tuple corresponding to unique TISCI resource type that + defines the dst host irq ranges assigned to this + interrupt router from this host context. + Tuple should be of format . + +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 = <0xb 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 29c08106bd22..a23778b68d74 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14625,6 +14625,7 @@ 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