From patchwork Wed Feb 28 13:24:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabien DESSENNE X-Patchwork-Id: 10247519 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1D04560365 for ; Wed, 28 Feb 2018 13:25:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0DB1628806 for ; Wed, 28 Feb 2018 13:25:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 01FC428C2C; Wed, 28 Feb 2018 13:25:47 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable 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 8A98C28806 for ; Wed, 28 Feb 2018 13:25:47 +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=BzMm9QvhCplbeofeMD/7SMz1Y5h0jIWOrphL9HQ4HMU=; b=ejRe3ToFCwtU0J knBJmxGb3kMo95LQAOu77fiMVqU3L1QHeXleMznmn2Iq4IG6f6DgVRJKMcKvQR6brdPq/S9Qsqv91 2ZlANjmDy9orKQKIxD9sbpu1aPy+UvLY4y7hqbogLpOWf7wevmzbpnoIc+z7HLdH4BTYyIASBbLBR p3mfIgBbdpCM8lyMDsdjLNlZywb8qdCoWlDK5jJzWAQasdAdDMCEnKp4QbulH53vVmSx+GJfDAoET jk90rDdELotBxLWEvnIUEMYWml79TYzRMUrGp4LsxDlgOr4X8jkIZV8Y2Sg2rD350V+griYt2DK16 zviXuLjr3fMeALVYSCmA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1er1jl-00020k-Qn; Wed, 28 Feb 2018 13:25:37 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1er1jI-0000V2-Di for linux-arm-kernel@lists.infradead.org; Wed, 28 Feb 2018 13:25:10 +0000 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w1SDNkw6030661; Wed, 28 Feb 2018 14:24:50 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2gax28mmft-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 28 Feb 2018 14:24:50 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 4114931; Wed, 28 Feb 2018 13:24:50 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 1DDCB2BA0; Wed, 28 Feb 2018 13:24:50 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by SAFEX1HUBCAS21.st.com (10.75.90.44) with Microsoft SMTP Server (TLS) id 14.3.361.1; Wed, 28 Feb 2018 14:24:50 +0100 Received: from localhost (10.201.23.25) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Wed, 28 Feb 2018 14:24:49 +0100 From: Fabien Dessenne To: Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre Torgue , Jassi Brar , "Ludovic Barre" , , , Subject: [PATCH 1/2] dt-bindings: mailbox: add STMicroelectronics STM32 IPCC binding Date: Wed, 28 Feb 2018 14:24:29 +0100 Message-ID: <1519824270-7134-2-git-send-email-fabien.dessenne@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1519824270-7134-1-git-send-email-fabien.dessenne@st.com> References: <1519824270-7134-1-git-send-email-fabien.dessenne@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.25] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-02-28_07:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180228_052508_833607_8E9B4289 X-CRM114-Status: GOOD ( 15.04 ) 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: Arnaud Pouliquen , Loic Pallardy , Benjamin Gaignard 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 a binding for the STMicroelectronics STM32 IPCC block exposing a mailbox mechanism between two processors. Signed-off-by: Fabien Dessenne Signed-off-by: Ludovic Barre --- .../devicetree/bindings/mailbox/stm32-ipcc.txt | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/stm32-ipcc.txt diff --git a/Documentation/devicetree/bindings/mailbox/stm32-ipcc.txt b/Documentation/devicetree/bindings/mailbox/stm32-ipcc.txt new file mode 100644 index 0000000..2321689 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/stm32-ipcc.txt @@ -0,0 +1,48 @@ +* STMicroelectronics STM32 IPCC (Inter-Processor Communication Controller) + +The IPCC block provides a non blocking signaling mechanism to post and +retrieve messages in an atomic way between two processors. +It provides the signaling for N bidirectionnal channels. The number of channels +(N) can be read from a dedicated register. + +Required properties: +- compatible: Must be "st,stm32-ipcc" +- reg: Register address range (base address and length) +- st,proc_id: Processor id using the mailbox (0 or 1) +- clocks: Input clock +- interrupt-names: List of names for the interrupts described by the interrupt + property. Must contain the following entries: + - "rx" + - "tx" +- interrupts: Interrupt specifiers for "rx channel occupied" and "tx channel + free" +- #mbox-cells: Number of cells required for the mailbox specifier. Must be 1. + The data contained in the mbox specifier of the "mboxes" + property in the client node is the mailbox channel index. + +Optional properties: +- wakeup-source: Flag to indicate whether this device can wake up the system +- interrupts: Wakeup interrupt used to wake up the system. +- interrupt-names: "wakeup" for the wakeup interrupt. + + + +Example: + ipcc: mailbox@4c001000 { + compatible = "st,stm32-ipcc"; + #mbox-cells = <1>; + reg = <0x4c001000 0x400>; + st,proc_id = <0>; + interrupts-extended = <&intc GIC_SPI 100 IRQ_TYPE_NONE>, + <&intc GIC_SPI 101 IRQ_TYPE_NONE>, + <&aiec 62 1>; + interrupt-names = "rx", "tx", "wakeup"; + clocks = <&rcc_clk IPCC>; + wakeup-source; + } + +Client: + mbox_test { + ... + mboxes = <&ipcc 0>, <&ipcc 1>; + };