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: 9630825 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A265960245 for ; Fri, 17 Mar 2017 14:12:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88EA028490 for ; Fri, 17 Mar 2017 14:12:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7BB7528543; Fri, 17 Mar 2017 14:12:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B0D4428490 for ; Fri, 17 Mar 2017 14:12:36 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 711D1267257; Fri, 17 Mar 2017 15:09:20 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 4DF1E267234; Fri, 17 Mar 2017 15:09:14 +0100 (CET) Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by alsa0.perex.cz (Postfix) with ESMTP id 718F8266A0A for ; Fri, 17 Mar 2017 15:09:02 +0100 (CET) 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 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 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, olivier moysan , kernel@stlinux.com, linux-iio@vger.kernel.org, arnaud.pouliquen@st.com, Maxime Coquelin , linux-arm-kernel@lists.infradead.org, Alexandre Torgue Subject: [alsa-devel] [PATCH v3 10/11] ASoC: add bindings for stm32 DFSDM filter X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP 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