From patchwork Tue Apr 11 15:47:25 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olivier MOYSAN X-Patchwork-Id: 9675653 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 5F680600CB for ; Tue, 11 Apr 2017 15:47:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 515291FF73 for ; Tue, 11 Apr 2017 15:47:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 42D7B28618; Tue, 11 Apr 2017 15:47:53 +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 60CA51FF73 for ; Tue, 11 Apr 2017 15:47:52 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id A0867266D81; Tue, 11 Apr 2017 17:47:38 +0200 (CEST) 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 F20AF266D6B; Tue, 11 Apr 2017 17:47:35 +0200 (CEST) Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [62.209.51.94]) by alsa0.perex.cz (Postfix) with ESMTP id 3C29C2666E1 for ; Tue, 11 Apr 2017 17:47:32 +0200 (CEST) Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id v3BFlHSL023801; Tue, 11 Apr 2017 17:47:32 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-.pphosted.com with ESMTP id 29pnav3drt-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 11 Apr 2017 17:47:32 +0200 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 6E75F31; Tue, 11 Apr 2017 15:47:31 +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 385FE31; Tue, 11 Apr 2017 15:47:31 +0000 (GMT) Received: from localhost (10.48.0.208) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.319.2; Tue, 11 Apr 2017 17:47:30 +0200 From: olivier moysan To: , , , , , , , , , , , , , Date: Tue, 11 Apr 2017 17:47:25 +0200 Message-ID: <1491925646-29113-2-git-send-email-olivier.moysan@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1491925646-29113-1-git-send-email-olivier.moysan@st.com> References: <1491925646-29113-1-git-send-email-olivier.moysan@st.com> MIME-Version: 1.0 X-Originating-IP: [10.48.0.208] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-11_13:, , signatures=0 Cc: arnaud.pouliquen@st.com, benjamin.gaignard@st.com Subject: [alsa-devel] [PATCH v4 1/2] ASoC: stm32: add bindings for SAI 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 This patch adds documentation of device tree bindings for the STM32 SAI ASoC driver. Signed-off-by: olivier moysan --- .../devicetree/bindings/sound/st,stm32-sai.txt | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/st,stm32-sai.txt diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt new file mode 100644 index 0000000..c59a3d7 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt @@ -0,0 +1,89 @@ +STMicroelectronics STM32 Serial Audio Interface (SAI). + +The SAI interface (Serial Audio Interface) offers a wide set of audio protocols +as I2S standards, LSB or MSB-justified, PCM/DSP, TDM, and AC'97. +The SAI contains two independent audio sub-blocks. Each sub-block has +its own clock generator and I/O lines controller. + +Required properties: + - compatible: Should be "st,stm32f4-sai" + - reg: Base address and size of SAI common register set. + - clocks: Must contain phandle and clock specifier pairs for each entry + in clock-names. + - clock-names: Must contain "x8k" and "x11k" + "x8k": SAI parent clock for sampling rates multiple of 8kHz. + "x11k": SAI parent clock for sampling rates multiple of 11.025kHz. + - interrupts: cpu DAI interrupt line shared by SAI sub-blocks + +Optional properties: + - resets: Reference to a reset controller asserting the SAI + +SAI subnodes: +Two subnodes corresponding to SAI sub-block instances A et B can be defined. +Subnode can be omitted for unsused sub-block. + +SAI subnodes required properties: + - compatible: Should be "st,stm32-sai-sub-a" or "st,stm32-sai-sub-b" + for SAI sub-block A or B respectively. + - reg: Base address and size of SAI sub-block register set. + - clocks: Must contain one phandle and clock specifier pair + for sai_ck which feeds the internal clock generator. + - clock-names: Must contain "sai_ck". + - dmas: see Documentation/devicetree/bindings/dma/stm32-dma.txt + - dma-names: identifier string for each DMA request line + "tx": if sai sub-block is configured as playback DAI + "rx": if sai sub-block is configured as capture DAI + - pinctrl-names: should contain only value "default" + - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt + +Example: +sound_card { + compatible = "audio-graph-card"; + dais = <&sai1b_port>; +}; + +sai1: sai1@40015800 { + compatible = "st,stm32f4-sai"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + reg = <0x40015800 0x4>; + clocks = <&rcc 1 CLK_SAIQ_PDIV>, <&rcc 1 CLK_I2SQ_PDIV>; + clock-names = "x8k", "x11k"; + interrupts = <87>; + + sai1b: audio-controller@40015824 { + #sound-dai-cells = <0>; + compatible = "st,stm32-sai-sub-b"; + reg = <0x40015824 0x1C>; + clocks = <&rcc 1 CLK_SAI2>; + clock-names = "sai_ck"; + dmas = <&dma2 5 0 0x400 0x0>; + dma-names = "tx"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_sai1b>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + sai1b_port: port@0 { + reg = <0>; + cpu_endpoint: endpoint { + remote-endpoint = <&codec_endpoint>; + audio-graph-card,format = "i2s"; + audio-graph-card,bitclock-master = <&codec_endpoint>; + audio-graph-card,frame-master = <&codec_endpoint>; + }; + }; + }; + }; +}; + +audio-codec { + codec_port: port { + codec_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint>; + }; + }; +};