From patchwork Thu Sep 11 02:18:53 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Gross X-Patchwork-Id: 388014 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 7469514011B for ; Thu, 11 Sep 2014 12:19:57 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752277AbaIKCTO (ORCPT ); Wed, 10 Sep 2014 22:19:14 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:52495 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751222AbaIKCTK (ORCPT ); Wed, 10 Sep 2014 22:19:10 -0400 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 1C5BA13FF95; Thu, 11 Sep 2014 02:19:10 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 0F9EF13FF9A; Thu, 11 Sep 2014 02:19:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-caf-smtp.dmz.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.1 Received: from localhost (108-85-129-155.lightspeed.austtx.sbcglobal.net [108.85.129.155]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: agross@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 5FA6013FF95; Thu, 11 Sep 2014 02:19:09 +0000 (UTC) From: Andy Gross To: Vinod Koul Cc: Kumar Gala , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Bjorn Andersson , dmaengine@vger.kernel.org, Andy Gross Subject: [PATCH 2/2] dmaengine: qcom_adm: Add device tree binding Date: Wed, 10 Sep 2014 21:18:53 -0500 Message-Id: <1410401933-20621-3-git-send-email-agross@codeaurora.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1410401933-20621-1-git-send-email-agross@codeaurora.org> References: <1410401933-20621-1-git-send-email-agross@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add device tree binding support for the QCOM ADM DMA driver. Signed-off-by: Andy Gross --- Documentation/devicetree/bindings/dma/qcom_adm.txt | 62 ++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/qcom_adm.txt diff --git a/Documentation/devicetree/bindings/dma/qcom_adm.txt b/Documentation/devicetree/bindings/dma/qcom_adm.txt new file mode 100644 index 0000000..9bcab91 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom_adm.txt @@ -0,0 +1,62 @@ +QCOM ADM DMA Controller + +Required properties: +- compatible: must contain "qcom,adm" for IPQ/APQ8064 and MSM8960 +- reg: Address range for DMA registers +- interrupts: Should contain one interrupt shared by all channels +- #dma-cells: must be <2>. First cell denotes the channel number. Second cell + denotes CRCI (client rate control interface) flow control assignment. +- clocks: Should contain the core clock and interface clock. +- clock-names: Must contain "core" for the core clock and "iface" for the + interface clock. +- resets: Must contain an entry for each entry in reset names. +- reset-names: Must include the following entries: + - clk + - c0 + - c1 + - c2 +- qcom,ee: indicates the security domain identifier used in the secure world. + +Example: + adm_dma: dma@18300000 { + compatible = "qcom,adm"; + reg = <0x18300000 0x100000>; + interrupts = <0 170 0>; + #dma-cells = <2>; + + clocks = <&gcc ADM0_CLK>, <&gcc ADM0_PBUS_CLK>; + clock-names = "core", "iface"; + + resets = <&gcc ADM0_RESET>, + <&gcc ADM0_C0_RESET>, + <&gcc ADM0_C1_RESET>, + <&gcc ADM0_C2_RESET>; + reset-names = "clk", "c0", "c1", "c2"; + qcom,ee = <0>; + }; + +DMA clients must use the format descripted in the dma.txt file, using a three +cell specifier for each channel. + +Each dmas request consists of 3 cells: + 1. phandle pointing to the DMA controller + 2. channel number + 3. CRCI assignment, if applicable. If no CRCI flow control is required, use 0. + The CRCI is used for flow control. It identifies the peripheral device that + is the source/destination for the transferred data. + +Example: + + spi4: spi@1a280000 { + status = "ok"; + spi-max-frequency = <50000000>; + + pinctrl-0 = <&spi_pins>; + pinctrl-names = "default"; + + cs-gpios = <&qcom_pinmux 20 0>; + + dmas = <&adm_dma 6 9>, + <&adm_dma 5 10>; + dma-names = "rx", "tx"; + };