From patchwork Fri Dec 1 17:40:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 10087661 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 7AC5C6035E for ; Fri, 1 Dec 2017 17:43:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6EA4E2A525 for ; Fri, 1 Dec 2017 17:43:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 639752A555; Fri, 1 Dec 2017 17:43:35 +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=unavailable 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 9D3E42A5B8 for ; Fri, 1 Dec 2017 17:43:34 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id DD155267D63; Fri, 1 Dec 2017 18:40:45 +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 AB06C267D54; Fri, 1 Dec 2017 18:40:44 +0100 (CET) Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by alsa0.perex.cz (Postfix) with ESMTP id B5A99267D38 for ; Fri, 1 Dec 2017 18:40:39 +0100 (CET) Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vB1HccEY002776; Fri, 1 Dec 2017 18:40:39 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2ef09hsv8e-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 01 Dec 2017 18:40:39 +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 D0D9231; Fri, 1 Dec 2017 17:40:38 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas24.st.com [10.75.90.94]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id B1E245805; Fri, 1 Dec 2017 17:40:38 +0000 (GMT) Received: from SAFEX1HUBCAS22.st.com (10.75.90.93) by Safex1hubcas24.st.com (10.75.90.94) with Microsoft SMTP Server (TLS) id 14.3.352.0; Fri, 1 Dec 2017 18:40:38 +0100 Received: from localhost (10.201.23.162) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.352.0; Fri, 1 Dec 2017 18:40:38 +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, 1 Dec 2017 18:40:19 +0100 Message-ID: <1512150020-20335-13-git-send-email-arnaud.pouliquen@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1512150020-20335-1-git-send-email-arnaud.pouliquen@st.com> References: <1512150020-20335-1-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=2017-12-01_04:, , signatures=0 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, Alexandre Torgue , linux-iio@vger.kernel.org, arnaud.pouliquen@st.com, Maxime Coquelin , linux-arm-kernel@lists.infradead.org Subject: [alsa-devel] [PATCH v6 12/13] 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 Acked-by: Rob Herring --- .../devicetree/bindings/sound/st,stm32-adfsdm.txt | 62 ++++++++++++++++++++++ 1 file changed, 62 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..2782cda --- /dev/null +++ b/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt @@ -0,0 +1,62 @@ +STMicroelectronics Audio Digital Filter Sigma Delta modulators(DFSDM) + +The DFSDM allows PDM microphones capture through SPI interface. The Audio +interface is seems as a sub block of the DFSDM device. +For details on DFSDM bindings refer to ../iio/adc/st,stm32-dfsdm-adc.txt + +Required properties: + - compatible: "st,stm32h7-dfsdm-dai". + + - #sound-dai-cells : Must be equal to 0 + + - io-channels : phandle to iio dfsdm instance node. + +Example of a sound card using audio DFSDM node. + + sound_card { + compatible = "audio-graph-card"; + + dais = <&cpu_port>; + }; + + dfsdm: dfsdm@40017000 { + compatible = "st,stm32h7-dfsdm"; + reg = <0x40017000 0x400>; + clocks = <&rcc DFSDM1_CK>; + clock-names = "dfsdm"; + #address-cells = <1>; + #size-cells = <0>; + + dfsdm_adc0: dfsdm-adc@0 { + compatible = "st,stm32-dfsdm-dmic"; + reg = <0>; + interrupts = <110>; + dmas = <&dmamux1 101 0x400 0x00>; + dma-names = "rx"; + st,adc-channels = <1>; + st,adc-channel-names = "dmic0"; + st,adc-channel-types = "SPI_R"; + st,adc-channel-clk-src = "CLKOUT"; + st,filter-order = <5>; + + dfsdm_dai0: dfsdm-dai { + compatible = "st,stm32h7-dfsdm-dai"; + #sound-dai-cells = <0>; + io-channels = <&dfsdm_adc0 0>; + cpu_port: port { + dfsdm_endpoint: endpoint { + remote-endpoint = <&dmic0_endpoint>; + }; + }; + }; + }; + + dmic0: dmic@0 { + compatible = "dmic-codec"; + #sound-dai-cells = <0>; + port { + dmic0_endpoint: endpoint { + remote-endpoint = <&dfsdm_endpoint>; + }; + }; + };