From patchwork Wed Aug 24 03:27:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: hs.liao@mediatek.com X-Patchwork-Id: 9296801 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 E0B9F60CF5 for ; Wed, 24 Aug 2016 03:30:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D3ED428A74 for ; Wed, 24 Aug 2016 03:30:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C7D6B28E16; Wed, 24 Aug 2016 03:30:12 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8CA1A28A74 for ; Wed, 24 Aug 2016 03:30:12 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bcOrk-0002p0-5n; Wed, 24 Aug 2016 03:28:36 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bcOrU-0002kW-5g; Wed, 24 Aug 2016 03:28:21 +0000 Received: from mtkhts09.mediatek.inc [(172.21.101.70)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1689060925; Wed, 24 Aug 2016 11:27:57 +0800 Received: from mtkslt205.mediatek.inc (10.21.15.75) by mtkhts09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Wed, 24 Aug 2016 11:27:55 +0800 From: HS Liao To: Rob Herring , Matthias Brugger Subject: [PATCH v13 1/4] dt-bindings: soc: Add documentation for the MediaTek GCE unit Date: Wed, 24 Aug 2016 11:27:29 +0800 Message-ID: <1472009252-1074-2-git-send-email-hs.liao@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1472009252-1074-1-git-send-email-hs.liao@mediatek.com> References: <1472009252-1074-1-git-send-email-hs.liao@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160823_202820_422429_7826B8C1 X-CRM114-Status: GOOD ( 13.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 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 , 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 This adds documentation for the MediaTek Global Command Engine (GCE) unit found in MT8173 SoCs. Signed-off-by: HS Liao Acked-by: Rob Herring --- .../devicetree/bindings/soc/mediatek/gce.txt | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/mediatek/gce.txt diff --git a/Documentation/devicetree/bindings/soc/mediatek/gce.txt b/Documentation/devicetree/bindings/soc/mediatek/gce.txt new file mode 100644 index 0000000..55c4105 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/mediatek/gce.txt @@ -0,0 +1,44 @@ +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/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 */ + ... + };