Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755226Ab3JYUZf (ORCPT ); Fri, 25 Oct 2013 16:25:35 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:38162 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754807Ab3JYUZD (ORCPT ); Fri, 25 Oct 2013 16:25:03 -0400 From: Andy Gross To: Vinod Koul Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Dan Williams , David Brown , Bryan Huntsman , Andy Gross Subject: [PATCH 2/2] dmaengine: msm_bam_dma: Add device tree binding Date: Fri, 25 Oct 2013 15:24:03 -0500 Message-Id: <1382732643-8184-3-git-send-email-agross@codeaurora.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1382732643-8184-1-git-send-email-agross@codeaurora.org> References: <1382732643-8184-1-git-send-email-agross@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2211 Lines: 72 Add device tree probe support for the MSM BAM DMA driver. Signed-off-by: Andy Gross --- .../devicetree/bindings/dma/msm_bam_dma.txt | 49 ++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/msm_bam_dma.txt diff --git a/Documentation/devicetree/bindings/dma/msm_bam_dma.txt b/Documentation/devicetree/bindings/dma/msm_bam_dma.txt new file mode 100644 index 0000000..fe3ed8f --- /dev/null +++ b/Documentation/devicetree/bindings/dma/msm_bam_dma.txt @@ -0,0 +1,49 @@ +MSM BAM DMA controller + +Required properties: +- compatible: Should be "qcom,bam" +- reg: Address range for DMA registers +- interrupts: single interrupt for this controller +- #dma-cells: must be <3> +- clocks: required clock +- clock-names: name of clock + +Example: + + dma0: dma@f9984000 = { + compatible = "qcom,bam"; + reg = <0xf9984000 0x15000>; + interrupts = <0 94 0>; + clocks = <&bam_dma_ahb_cxc>; + clock-names = "bam_clk"; + #dma-cells = <3>; + }; + +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 four cell +specifier for each channel. + +The four cells in order are: + 1. A phandle pointing to the DMA controller + 2. The channel number + 3. The execution environment value for this channel. + 4. Direction of the fixed unidirectional channel + 0 - Memory to Device + 1 - Device to Memory + +Example: + serial@f991e000 { + compatible = "qcom,msm-uart"; + reg = <0xf991e000 0x1000> + <0xf9944000 0x19000>; + interrupts = <0 108 0>; + clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>; + clock-names = "gsbi_uart_clk", "gsbi_pclk"; + + dmas = <&dma0 0 0 1>, <&dma0 1 0 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/