From patchwork Mon Sep 25 00:02:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Stefan_Br=C3=BCns?= X-Patchwork-Id: 9968989 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 4CA26602B9 for ; Mon, 25 Sep 2017 00:08:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3D6762837E for ; Mon, 25 Sep 2017 00:08:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 305F12860C; Mon, 25 Sep 2017 00:08:23 +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 autolearn=ham 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 0A5D72838B for ; Mon, 25 Sep 2017 00:08:21 +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:Message-ID:MIME-Version:References: In-Reply-To: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=hkydrwASjRgkY/1oKJ/FGIzr+uvfINKa1X/hc8OJnTE=; b=ENLdWgV3dWWDwi HfBSrDpmaWda39e1HevJfEnbXr5cmPv/hy5nHJrBOgdIFOFlQ35UBufuHz22GZKXiusyu8el/Lcxz MlLtKpgByPChw3U+VU1uHhjQsJljQfG76TdvEArBqiGBwbYjwdVWrvo3bnysMeIPW5We9f3VBrTAi QxdWrJDa1mfY8ODNus8IpWI5tO1rFnMUnK+GZQ0jWXY26uplEibBBs67K0D0rGZ+yHWTrT2U51E71 5m7bqYhm23EKpSHxkwSXKTvGWC+I30JbIddpbkdEJ1sFsnGhRKI/bYbaTzvzm76MjrKmf289Rm/1n ihe8wOL2LeGHmtopgbMQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dwGwC-0000PZ-18; Mon, 25 Sep 2017 00:07:52 +0000 Received: from mail-out-2.itc.rwth-aachen.de ([134.130.5.47]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dwGs7-0003sx-1D for linux-arm-kernel@lists.infradead.org; Mon, 25 Sep 2017 00:03:48 +0000 X-IronPort-AV: E=Sophos;i="5.42,434,1500933600"; d="scan'208";a="14891870" Received: from rwthex-w2-a.rwth-ad.de ([134.130.26.158]) by mail-in-2.itc.rwth-aachen.de with ESMTP; 25 Sep 2017 02:03:05 +0200 Received: from pebbles.fritz.box (77.182.212.37) by rwthex-w2-a.rwth-ad.de (2002:8682:1a9e::8682:1a9e) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1034.26; Mon, 25 Sep 2017 02:03:00 +0200 From: =?UTF-8?q?Stefan=20Br=C3=BCns?= To: Subject: [PATCH v3 06/10] arm64: allwinner: a64: Add devicetree binding for DMA controller Date: Mon, 25 Sep 2017 02:02:40 +0200 X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170925000244.11679-1-stefan.bruens@rwth-aachen.de> References: <20170925000244.11679-1-stefan.bruens@rwth-aachen.de> MIME-Version: 1.0 X-Originating-IP: [77.182.212.37] X-ClientProxiedBy: rwthex-s3-b.rwth-ad.de (2002:8682:1aa1::8682:1aa1) To rwthex-w2-a.rwth-ad.de (2002:8682:1a9e::8682:1a9e) Message-ID: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170924_170340_186966_F556605F X-CRM114-Status: UNSURE ( 8.43 ) X-CRM114-Notice: Please train this message. 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: Mark Rutland , devicetree@vger.kernel.org, Vinod Koul , Andre Przywara , linux-kernel@vger.kernel.org, =?UTF-8?q?Stefan=20Br=C3=BCns?= , Code Kipper , Chen-Yu Tsai , Rob Herring , dmaengine@vger.kernel.org, Dan Williams , Maxime Ripard , linux-arm-kernel@lists.infradead.org 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 The A64 is register compatible with the H3, but has a different number of dma channels and request ports. Attach additional properties to the node to allow future reuse of the compatible for controllers with different number of channels/requests. If dma-requests is not specified, the register layout defined maximum of 32 is used. Signed-off-by: Stefan Brüns Acked-by: Rob Herring --- Changes in v3: - Drop leading 0 from unit name in DT example Changes in v2: None .../devicetree/bindings/dma/sun6i-dma.txt | 28 +++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/dma/sun6i-dma.txt b/Documentation/devicetree/bindings/dma/sun6i-dma.txt index 98fbe1a5c6dd..b2df4f0f1488 100644 --- a/Documentation/devicetree/bindings/dma/sun6i-dma.txt +++ b/Documentation/devicetree/bindings/dma/sun6i-dma.txt @@ -18,7 +18,7 @@ Required properties: - #dma-cells : Should be 1, a single cell holding a line request number Example: - dma: dma-controller@01c02000 { + dma: dma-controller@1c02000 { compatible = "allwinner,sun6i-a31-dma"; reg = <0x01c02000 0x1000>; interrupts = <0 50 4>; @@ -27,6 +27,32 @@ Example: #dma-cells = <1>; }; +------------------------------------------------------------------------------ +For A64 DMA controller: + +Required properties: +- compatible: "allwinner,sun50i-a64-dma" +- dma-channels: Number of DMA channels supported by the controller. + Refer to Documentation/devicetree/bindings/dma/dma.txt +- all properties above, i.e. reg, interrupts, clocks, resets and #dma-cells + +Optional properties: +- dma-requests: Number of DMA request signals supported by the controller. + Refer to Documentation/devicetree/bindings/dma/dma.txt + +Example: + dma: dma-controller@1c02000 { + compatible = "allwinner,sun50i-a64-dma"; + reg = <0x01c02000 0x1000>; + interrupts = ; + clocks = <&ccu CLK_BUS_DMA>; + dma-channels = <8>; + dma-requests = <27>; + resets = <&ccu RST_BUS_DMA>; + #dma-cells = <1>; + }; +------------------------------------------------------------------------------ + Clients: DMA clients connected to the A31 DMA controller must use the format