Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751880AbaFZUav (ORCPT ); Thu, 26 Jun 2014 16:30:51 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:58860 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751654AbaFZUae (ORCPT ); Thu, 26 Jun 2014 16:30:34 -0400 From: Andy Gross To: Vinod Koul Cc: Bjorn Andersson , Dan Williams , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, Kumar Gala , devicetree@vger.kernel.org, Andy Gross Subject: [PATCH 2/2] dmaengine: qcom_adm: Add device tree binding Date: Thu, 26 Jun 2014 15:30:16 -0500 Message-Id: <1403814616-23917-3-git-send-email-agross@codeaurora.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1403814616-23917-1-git-send-email-agross@codeaurora.org> References: <1403814616-23917-1-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 ADM DMA driver. Signed-off-by: Andy Gross --- Documentation/devicetree/bindings/dma/qcom_adm.txt | 60 ++++++++++++++++++++ 1 file changed, 60 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..7f05cb5 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom_adm.txt @@ -0,0 +1,60 @@ +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. + +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"; + }; -- 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/