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: 9630837 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 5ED1960245 for ; Fri, 17 Mar 2017 14:17:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4299C28427 for ; Fri, 17 Mar 2017 14:17:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3310928490; Fri, 17 Mar 2017 14:17:03 +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,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9276628427 for ; Fri, 17 Mar 2017 14:17:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MjIrh7ijzBP8wrHA8Hzz2Gbe8ngVy7hGZh5cTAveDZo=; b=tYORDHoSfWI/21 +tQmDZKcyQlagUjUlmu+CGJONWqZL03wG3ZEkSpwxPcIa8Cas1yuNS6drmPHs1vWKxMlJjWL8mmq8 kk26p0pSUd0/Z/4pvPbRNSbYcakkbhluLCEtOet/1yNZWAdFbEvLXyH/e6YOOf4uMYa8D/hTLTEZI p9MToal8oh/ilRP7hdg5jtIaPax+xcVJVm7ZCTxe1KTYtv6zRGelrzUd8MuoagIH8WWYv21R0v1f3 WQdsHiIIPrJnKUTcUfKz4IyIddXyRH2iCHoYn9CJM6kIO/MCuEyivKzcZtRS6cgPm4LnC33WAYroM zgoLridIb2As954IQN3g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cosgf-0007kh-UE; Fri, 17 Mar 2017 14:17:01 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cosZM-0000XS-RM for linux-arm-kernel@lists.infradead.org; Fri, 17 Mar 2017 14:09:33 +0000 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 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170317_070929_351518_D82F594F X-CRM114-Status: GOOD ( 11.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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