Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754662AbaA1G21 (ORCPT ); Tue, 28 Jan 2014 01:28:27 -0500 Received: from smtp.codeaurora.org ([198.145.11.231]:58026 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754604AbaA1G2U (ORCPT ); Tue, 28 Jan 2014 01:28:20 -0500 From: Andy Gross To: Vinod Koul , Dan Williams , dmaengine@vger.kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, Andy Gross Subject: [Patch v3 2/2] dmaengine: qcom_bam_dma: Add device tree binding Date: Tue, 28 Jan 2014 00:27:51 -0600 Message-Id: <1390890471-14882-3-git-send-email-agross@codeaurora.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1390890471-14882-1-git-send-email-agross@codeaurora.org> References: <1390890471-14882-1-git-send-email-agross@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add device tree binding support for the QCOM BAM DMA driver. Signed-off-by: Andy Gross --- .../devicetree/bindings/dma/qcom_bam_dma.txt | 52 ++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/qcom_bam_dma.txt diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt new file mode 100644 index 0000000..53fd10a --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt @@ -0,0 +1,52 @@ +QCOM BAM DMA controller + +Required properties: +- compatible: Must be "qcom,bam-v1.4.0" for MSM8974 V1 + Must be "qcom,bam-v1.4.1" for MSM8974 V2 +- reg: Address range for DMA registers +- interrupts: single interrupt for this controller +- #dma-cells: must be <2> +- clocks: required clock +- clock-names: name of clock +- qcom,ee : indicates the active Execution Environment identifier (0-7) + +Example: + + uart-bam: dma@f9984000 = { + compatible = "qcom,bam-v1.4.1"; + reg = <0xf9984000 0x15000>; + interrupts = <0 94 0>; + clocks = <&gcc GCC_BAM_DMA_AHB_CLK>; + clock-names = "bam_clk"; + #dma-cells = <2>; + qcom,ee = <0>; + }; + +Client: +Required properties: +- dmas: List of dma channel requests +- dma-names: Names of aforementioned requested channels + +Clients must use the format described in the dma.txt file, using a three cell +specifier for each channel. + +The three cells in order are: + 1. A phandle pointing to the DMA controller + 2. The channel number + 3. Direction of the fixed unidirectional channel + 0 - Memory to Device + 1 - Device to Memory + 2 - Device to Device + +Example: + serial@f991e000 { + compatible = "qcom,msm-uart"; + reg = <0xf991e000 0x1000> + <0xf9944000 0x19000>; + interrupts = <0 108 0>; + clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>, <&gcc GCC_BLSP1_AHB_CLK>; + clock-names = "core", "iface"; + + dmas = <&uart-bam 0 1>, <&uart-bam 1 0>; + dma-names = "rx", "tx"; + }; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/