From patchwork Thu Aug 2 07:23:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 10553317 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 6AD2E13BB for ; Thu, 2 Aug 2018 07:24:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 54C4C27F82 for ; Thu, 2 Aug 2018 07:24:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4872E2AF7A; Thu, 2 Aug 2018 07:24:32 +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 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 E1B1427F82 for ; Thu, 2 Aug 2018 07:24:31 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=mYGGbEfjqJJZT0Kp7rnE8q7T6XYq7JwgAc4haXib7gU=; b=l1v6ice6R9tHHOpKlVo6btFY+h zMYu4TLPUdzmOdC+6qKMebqidjWYV+OEXfXTw30lge3aMrYEZ6CYNVGDFCMdKCg2JFLW/7je9MA4k mdwpIg5S0/wa7iBRAPgs4zRK01wKjlfX6aCvdEh33veSgsqpjoCc8tq+B50BDePgCEslZifm09CRr LXYhUIcEFt6kMbQ57HXi4GSiXVA16r19cah6CkaKpRXAQl9NcDwAeMC+wIX3P/B+zkz2eZs5Iop1w MkpGM55R8ol9g0mUJ+EwJQ7qHdCUNJkG1hnbh0jJ2Xl6rH9j2e87v8b7YomUU/7AJ0npzD+ZR6lZb Lq9VpxGg==; 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 1fl7yD-0002h0-2a; Thu, 02 Aug 2018 07:24:25 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fl7xb-0001vs-Be for linux-arm-kernel@lists.infradead.org; Thu, 02 Aug 2018 07:23:50 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1fl7xH-00013K-Us; Thu, 02 Aug 2018 09:23:27 +0200 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.91) (envelope-from ) id 1fl7xG-0005zx-T5; Thu, 02 Aug 2018 09:23:26 +0200 From: Oleksij Rempel To: Shawn Guo , Fabio Estevam , Rob Herring , Mark Rutland , "A.s. Dong" , Vladimir Zapolskiy , Jassi Brar Subject: [PATCH v9 1/4] dt-bindings: arm: fsl: add mu binding doc Date: Thu, 2 Aug 2018 09:23:22 +0200 Message-Id: <20180802072325.22991-2-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180802072325.22991-1-o.rempel@pengutronix.de> References: <20180802072325.22991-1-o.rempel@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180802_002347_647021_55EDF691 X-CRM114-Status: GOOD ( 11.58 ) 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: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sascha Hauer , dl-linux-imx MIME-Version: 1.0 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 From: Dong Aisheng The Messaging Unit module enables two processors within the SoC to communicate and coordinate by passing messages (e.g. data, status and control) through the MU interface. Cc: Shawn Guo Cc: Sascha Hauer Cc: Fabio Estevam Cc: Mark Rutland Cc: devicetree@vger.kernel.org Reviewed-by: Rob Herring Signed-off-by: Dong Aisheng --- .../devicetree/bindings/mailbox/fsl,mu.txt | 34 +++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/fsl,mu.txt diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.txt b/Documentation/devicetree/bindings/mailbox/fsl,mu.txt new file mode 100644 index 000000000000..90e4905dfc69 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/fsl,mu.txt @@ -0,0 +1,34 @@ +NXP i.MX Messaging Unit (MU) +-------------------------------------------------------------------- + +The Messaging Unit module enables two processors within the SoC to +communicate and coordinate by passing messages (e.g. data, status +and control) through the MU interface. The MU also provides the ability +for one processor to signal the other processor using interrupts. + +Because the MU manages the messaging between processors, the MU uses +different clocks (from each side of the different peripheral buses). +Therefore, the MU must synchronize the accesses from one side to the +other. The MU accomplishes synchronization using two sets of matching +registers (Processor A-facing, Processor B-facing). + +Messaging Unit Device Node: +============================= + +Required properties: +------------------- +- compatible : should be "fsl,-mu", the supported chips include + imx8qxp, imx8qm. +- reg : Should contain the registers location and length +- interrupts : Interrupt number. The interrupt specifier format depends + on the interrupt controller parent. +- #mbox-cells: Must be 0. Number of cells in a mailbox + +Examples: +-------- +lsio_mu0: mailbox@5d1b0000 { + compatible = "fsl,imx8qxp-mu"; + reg = <0x0 0x5d1b0000 0x0 0x10000>; + interrupts = ; + #mbox-cells = <0>; +};