From patchwork Fri Dec 6 10:02:49 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lars-Peter Clausen X-Patchwork-Id: 297695 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 B11D22C00A6 for ; Fri, 6 Dec 2013 21:02:54 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756772Ab3LFKCu (ORCPT ); Fri, 6 Dec 2013 05:02:50 -0500 Received: from smtp-out-159.synserver.de ([212.40.185.159]:1081 "EHLO smtp-out-151.synserver.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757447Ab3LFKCq (ORCPT ); Fri, 6 Dec 2013 05:02:46 -0500 Received: (qmail 8049 invoked by uid 0); 6 Dec 2013 10:02:09 -0000 X-SynServer-TrustedSrc: 1 X-SynServer-AuthUser: lars@metafoo.de X-SynServer-PPID: 7773 Received: from p4fe60d43.dip0.t-ipconnect.de (HELO lars-adi-laptop.analog.com) [79.230.13.67] by 217.119.54.81 with SMTP; 6 Dec 2013 10:02:08 -0000 From: Lars-Peter Clausen To: Mark Brown , Liam Girdwood Cc: alsa-devel@alsa-project.org, Lars-Peter Clausen , Rob Herring , Pawel Moll , Mark Rutland , Stephen Warren , Ian Campbell , devicetree@vger.kernel.org Subject: [PATCH v2 1/4] dt: Add bindings documentation for the ADI AXI-I2S controller Date: Fri, 6 Dec 2013 11:02:49 +0100 Message-Id: <1386324172-15609-1-git-send-email-lars@metafoo.de> X-Mailer: git-send-email 1.8.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch adds the devicetree documentation for the ADI AXI-SPDIF audio controller. The controller has: * One set of memory mapped register * Two clocks, one for the memory mapped register interface, one used as the audio reference clock * One DMA interface each for the transmit and receive data Signed-off-by: Lars-Peter Clausen Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Stephen Warren Cc: Ian Campbell Cc: devicetree@vger.kernel.org --- Changes since v1: * Use <&a ...>, <&b ...> instead of <&a ..., &b ...> in the examples --- .../devicetree/bindings/sound/adi,axi-i2s.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/adi,axi-i2s.txt diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt new file mode 100644 index 0000000..5875ca4 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt @@ -0,0 +1,31 @@ +ADI AXI-I2S controller + +Required properties: + - compatible : Must be "adi,axi-i2s-1.00.a" + - reg : Must contain I2S core's registers location and length + - clocks : Pairs of phandle and specifier referencing the controller's clocks. + The controller expects two clocks, the clock used for the AXI interface and + the clock used as the sampling rate reference clock sample. + - clock-names : "axi" for the clock to the AXI interface, "ref" for the sample + rate reference clock. + - dmas: Pairs of phandle and specifier for the DMA channels that are used by + the core. The core expects two dma channels, one for transmit and one for + receive. + - dma-names : "tx" for the transmit channel, "rx" for the receive channel. + +For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties +please check: + * resource-names.txt + * clock/clock-bindings.txt + * dma/dma.txt + +Example: + + i2s: i2s@0x77600000 { + compatible = "adi,axi-i2s-1.00.a"; + reg = <0x77600000 0x1000>; + clocks = <&clk 15>, <&audio_clock>; + clock-names = "axi", "ref"; + dmas = <&ps7_dma 0>, <&ps7_dma 1>; + dma-names = "tx", "rx"; + };