From patchwork Mon Sep 5 13:16:45 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Griffin X-Patchwork-Id: 9313801 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 7B4D7607D3 for ; Mon, 5 Sep 2016 13:22:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6C92228899 for ; Mon, 5 Sep 2016 13:22:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 60F9128A9B; Mon, 5 Sep 2016 13:22:02 +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=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 05BED28A9F for ; Mon, 5 Sep 2016 13:22:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ECDE46E417; Mon, 5 Sep 2016 13:21:48 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wm0-x22d.google.com (mail-wm0-x22d.google.com [IPv6:2a00:1450:400c:c09::22d]) by gabe.freedesktop.org (Postfix) with ESMTPS id A9B756E402 for ; Mon, 5 Sep 2016 13:17:14 +0000 (UTC) Received: by mail-wm0-x22d.google.com with SMTP id b187so19420190wme.1 for ; Mon, 05 Sep 2016 06:17:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tNY9s/9LhRd2u6j/NX+rBanY3x3vAJVDPwR2PHme9Dk=; b=kWJDvvWrksb3OczKN+1XN0lsfiRqfdWgvz/8qmhM4UtmPnuBL1FAbboxysFqGkIuea EcRkSg28xT94u6BB2ZUkHdDEeaS/6CtBR860Jn0vfhRm8QyiRuJi/8o3HPTiab8XwVHb qCUpCpYjJxtnwOnOXcVfFIiV38GyRLfVBFy0s= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=tNY9s/9LhRd2u6j/NX+rBanY3x3vAJVDPwR2PHme9Dk=; b=lDuI9jPEgQmFU9HovshC9bLWW910Z9x0ucevlvZ0TYa5tqrMCU3LE2GdxHLAXVZsS2 /e6P0+uRXy8WW39TZGm23SBmAOhoH/80bKwJFiq8DVvpEDib67imjr9M0ExYaRrAGNGC aB6xwfCai28DsrKS+8tSYwcCnqh0RDOJKghqZQtOW31p3N+xqAWTbYFycYnv6HLh2yNy XOgSBgrbpx1uiCm0M/EV9lyG83kkakBHVDIiAO+qJx+ajRjzdNBhtp1MtjhooYz4aLQK RVkqF8WaCtajSE/7HXFjnBU60LA8BmfLR+GJGZf0eksWfnyhJ1Gwb/QYfXqH2l1l4LIa ch1A== X-Gm-Message-State: AE9vXwOeKgWz/O1kZm9z+3tjG/yhk7wCk5U824HWZBdIzpsZNFBHQ8F76lsl9GK9afZU7zaO X-Received: by 10.28.232.67 with SMTP id f64mr14834649wmh.15.1473081433194; Mon, 05 Sep 2016 06:17:13 -0700 (PDT) Received: from localhost.localdomain (cpc89244-aztw30-2-0-cust4998.18-1.cable.virginm.net. [86.31.179.135]) by smtp.gmail.com with ESMTPSA id ub8sm27750982wjc.39.2016.09.05.06.17.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 05 Sep 2016 06:17:11 -0700 (PDT) From: Peter Griffin To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@stlinux.com, vinod.koul@intel.com, patrice.chotard@st.com, dan.j.williams@intel.com, airlied@linux.ie, kraxel@redhat.com, ohad@wizery.com, bjorn.andersson@linaro.org Subject: [PATCH v9 03/19] dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding documentation Date: Mon, 5 Sep 2016 14:16:45 +0100 Message-Id: <1473081421-16555-4-git-send-email-peter.griffin@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1473081421-16555-1-git-send-email-peter.griffin@linaro.org> References: <1473081421-16555-1-git-send-email-peter.griffin@linaro.org> X-Mailman-Approved-At: Mon, 05 Sep 2016 13:21:43 +0000 Cc: devicetree@vger.kernel.org, linux-remoteproc@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, peter.griffin@linaro.org, dmaengine@vger.kernel.org, lee.jones@linaro.org, Ludovic Barre X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds the DT binding documentation for the FDMA constroller found on STi based chipsets from STMicroelectronics. Signed-off-by: Ludovic Barre Signed-off-by: Peter Griffin Acked-by: Rob Herring --- Documentation/devicetree/bindings/dma/st_fdma.txt | 87 +++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt diff --git a/Documentation/devicetree/bindings/dma/st_fdma.txt b/Documentation/devicetree/bindings/dma/st_fdma.txt new file mode 100644 index 0000000..495d853 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/st_fdma.txt @@ -0,0 +1,87 @@ +* STMicroelectronics Flexible Direct Memory Access Device Tree bindings + +The FDMA is a general-purpose direct memory access controller capable of +supporting 16 independent DMA channels. It accepts up to 32 DMA requests. +The FDMA is based on a Slim processor which requires a firmware. + +* FDMA Controller + +Required properties: +- compatible : Should be one of + - st,stih407-fdma-mpe31-11, "st,slim-rproc"; + - st,stih407-fdma-mpe31-12, "st,slim-rproc"; + - st,stih407-fdma-mpe31-13, "st,slim-rproc"; +- reg : Should contain an entry for each name in reg-names +- reg-names : Must contain "slimcore", "dmem", "peripherals", "imem" entries +- interrupts : Should contain one interrupt shared by all channels +- dma-channels : Number of channels supported by the controller +- #dma-cells : Must be <3>. See DMA client section below +- clocks : Must contain an entry for each clock +See: Documentation/devicetree/bindings/clock/clock-bindings.txt + + +Example: + + fdma0: dma-controller@8e20000 { + compatible = "st,stih407-fdma-mpe31-11", "st,slim-rproc"; + reg = <0x8e20000 0x8000>, + <0x8e30000 0x3000>, + <0x8e37000 0x1000>, + <0x8e38000 0x8000>; + reg-names = "slimcore", "dmem", "peripherals", "imem"; + clocks = <&clk_s_c0_flexgen CLK_FDMA>, + <&clk_s_c0_flexgen CLK_EXT2F_A9>, + <&clk_s_c0_flexgen CLK_EXT2F_A9>, + <&clk_s_c0_flexgen CLK_EXT2F_A9>; + interrupts = ; + dma-channels = <16>; + #dma-cells = <3>; + }; + +* DMA client + +Required properties: +- dmas: Comma separated list of dma channel requests +- dma-names: Names of the aforementioned requested channels + +Each dmas request consists of 4 cells: +1. A phandle pointing to the FDMA controller +2. The request line number +3. A 32bit mask specifying (see include/linux/platform_data/dma-st-fdma.h) + -bit 2-0: Holdoff value, dreq will be masked for + 0x0: 0-0.5us + 0x1: 0.5-1us + 0x2: 1-1.5us + -bit 17: data swap + 0x0: disabled + 0x1: enabled + -bit 21: Increment Address + 0x0: no address increment between transfers + 0x1: increment address between transfers + -bit 22: 2 STBus Initiator Coprocessor interface + 0x0: high priority port + 0x1: low priority port +4. transfers type + 0 free running + 1 paced + +Example: + + sti_uni_player2: sti-uni-player@2 { + compatible = "st,sti-uni-player"; + status = "disabled"; + #sound-dai-cells = <0>; + st,syscfg = <&syscfg_core>; + clocks = <&clk_s_d0_flexgen CLK_PCM_2>; + assigned-clocks = <&clk_s_d0_flexgen CLK_PCM_2>; + assigned-clock-parents = <&clk_s_d0_quadfs 2>; + assigned-clock-rates = <50000000>; + reg = <0x8D82000 0x158>; + interrupts = ; + dmas = <&fdma0 4 0 1>; + dai-name = "Uni Player #1 (DAC)"; + dma-names = "tx"; + st,uniperiph-id = <2>; + st,version = <5>; + st,mode = "PCM"; + };