From patchwork Wed Jan 31 07:28:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "houlong.wei" X-Patchwork-Id: 10193335 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 E6D09603EE for ; Wed, 31 Jan 2018 07:30:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CC36928478 for ; Wed, 31 Jan 2018 07:30:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C0CD5284AF; Wed, 31 Jan 2018 07:30:15 +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=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5415D28478 for ; Wed, 31 Jan 2018 07:30:15 +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=QMQH7/UH/7XOyF3nQA68ZVVxBWyCiik+27j29izhL+w=; b=TnyPKiL52d/waq 0rwc6KVYN4TPb93wivqrYPmXFo/VBj0h8L14FY6aOF7Ix339TkA5N7ZzFSXwC2M95I+LG+Lu2fdY4 5gvqjrYwnWD3AQl8/RD/0vYOpsi6oGIeAB1LZPCb3gsNQwyGIfv5Z+Ua48sNVhGsgccVZM34bSeXS itjg1hepZENI74FtXlXPSpEec4HcXb6DKYN3ay4EfHqCZ13JFMDB2812NSCpff6UBtiDLgcZhNgOG 9Y1kSY5MVOGXPKZswHeXNDFjtBOFh7mz1czjYM5+cJMx1YznML+dsM1gGPAm7NVjblo6+3+t1Rg2d 6hKtbbhDgA1OIYa9LwKA==; 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 1egmqQ-0002gm-SB; Wed, 31 Jan 2018 07:30:10 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1egmpt-0001aG-2O; Wed, 31 Jan 2018 07:29:40 +0000 X-UUID: 92001e108a58436bb09d394b6582c16a-20180131 Received: from mtkcas09.mediatek.inc [(172.21.101.178)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 244769415; Wed, 31 Jan 2018 15:29:23 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Wed, 31 Jan 2018 15:29:21 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Wed, 31 Jan 2018 15:29:20 +0800 From: To: Jassi Brar , Matthias Brugger , Rob Herring Subject: [PATCH v21 1/4] dt-bindings: soc: Add documentation for the MediaTek GCE unit Date: Wed, 31 Jan 2018 15:28:10 +0800 Message-ID: <1517383693-25591-2-git-send-email-houlong.wei@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1517383693-25591-1-git-send-email-houlong.wei@mediatek.com> References: <1517383693-25591-1-git-send-email-houlong.wei@mediatek.com> MIME-Version: 1.0 X-MTK: N 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: Daniel Kurtz , Monica Wang , Jiaguang Zhang , Nicolas Boichat , cawa cheng , HS Liao , Bibby Hsieh , YT Shen , Damon Chu , devicetree@vger.kernel.org, Sascha Hauer , Daoyuan Huang , Sascha Hauer , Houlong Wei , Glory Hung , CK HU , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, srv_heupstream@mediatek.com, Josh-YC Liu , linux-kernel@vger.kernel.org, Dennis-YC Hsieh , Philipp Zabel 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: "hs.liao@mediatek.com" This adds documentation for the MediaTek Global Command Engine (GCE) unit found in MT8173 SoCs. Signed-off-by: Houlong Wei Signed-off-by: HS Liao Acked-by: Rob Herring --- .../devicetree/bindings/mailbox/mtk-gce.txt | 43 ++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/mtk-gce.txt diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt new file mode 100644 index 0000000..d2d3ccb --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt @@ -0,0 +1,43 @@ +MediaTek GCE +=============== + +The Global Command Engine (GCE) is used to help read/write registers with +critical time limitation, such as updating display configuration during the +vblank. The GCE can be used to implement the Command Queue (CMDQ) driver. + +CMDQ driver uses mailbox framework for communication. Please refer to +mailbox.txt for generic information about mailbox device-tree bindings. + +Required properties: +- compatible: Must be "mediatek,mt8173-gce" +- reg: Address range of the GCE unit +- interrupts: The interrupt signal from the GCE block +- clock: Clocks according to the common clock binding +- clock-names: Must be "gce" to stand for GCE clock +- #mbox-cells: Should be 2 + +Required properties for a client device: +- mboxes: client use mailbox to communicate with GCE, it should have this + property and list of phandle, mailbox channel specifiers, and atomic + execution flag. + +Example: + + gce: gce@10212000 { + compatible = "mediatek,mt8173-gce"; + reg = <0 0x10212000 0 0x1000>; + interrupts = ; + clocks = <&infracfg CLK_INFRA_GCE>; + clock-names = "gce"; + + #mbox-cells = <2>; + }; + +Example for a client device: + + mmsys: clock-controller@14000000 { + compatible = "mediatek,mt8173-mmsys"; + mboxes = <&gce 0 1 /* main display with atomic execution */ + &gce 1 1>; /* sub display with atomic execution */ + ... + };