From patchwork Fri Mar 17 14:08:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 740333 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 3vl7Cd4N18z9ryj for ; Sat, 18 Mar 2017 01:34:53 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751039AbdCQOex (ORCPT ); Fri, 17 Mar 2017 10:34:53 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:20929 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751023AbdCQOew (ORCPT ); Fri, 17 Mar 2017 10:34:52 -0400 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id v2HE1TeA013864; Fri, 17 Mar 2017 15:09:02 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-.pphosted.com with ESMTP id 297y07xhsm-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 17 Mar 2017 15:09:02 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 3253631; Fri, 17 Mar 2017 14:09:01 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 0F6C7298F; Fri, 17 Mar 2017 14:09:01 +0000 (GMT) Received: from localhost (10.201.23.162) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.319.2; Fri, 17 Mar 2017 15:09:00 +0100 From: Arnaud Pouliquen To: Rob Herring , Mark Rutland , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown CC: , , , , , Maxime Coquelin , Alexandre Torgue , , olivier moysan Subject: [PATCH v3 10/11] ASoC: add bindings for stm32 DFSDM filter Date: Fri, 17 Mar 2017 15:08:23 +0100 Message-ID: <1489759704-30217-11-git-send-email-arnaud.pouliquen@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1489759704-30217-1-git-send-email-arnaud.pouliquen@st.com> References: <1489759704-30217-1-git-send-email-arnaud.pouliquen@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.162] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-03-17_11:, , signatures=0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add bindings that describes audio settings to support Digital Filter for pulse density modulation(PDM) microphone. Signed-off-by: Arnaud Pouliquen --- V2->V3: Fixes based on V2 comments .../devicetree/bindings/sound/st,stm32-adfsdm.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt diff --git a/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt b/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt new file mode 100644 index 0000000..ab610bc --- /dev/null +++ b/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt @@ -0,0 +1,40 @@ +STMicroelectronics audio DFSDM DT bindings + +This driver supports audio PDM microphone capture through Digital Filter format +Sigma Delta modulators (DFSDM). + +Required properties: + - compatible: "st,stm32h7-adfsdm". + + - #sound-dai-cells : Must be equal to 0 + + - io-channels : phandle to iio dfsdm instance node. + + +Example of a simple sound card using audio DFSDM node. + + dmic0: dmic_@0 { + compatible = "dmic-codec"; + #sound-dai-cells = <0>; + }; + + asoc-pdm@0 { + compatible = "st,stm32h7-adfsdm"; + #sound-dai-cells = <0>; + io-channels = <&dfsdm_adc0 0>; + }; + + sound_dfsdm_pdm { + compatible = "simple-audio-card"; + simple-audio-card,name = "dfsdm_pdm"; + + dfsdm0_mic0: simple-audio-card,dai-link@0 { + format = "pdm"; + cpu { + sound-dai = <&asoc_pdm1>; + }; + dmic0_codec: codec { + sound-dai = <&dmic0>; + }; + }; + }; \ No newline at end of file