Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753973AbdFPOBP (ORCPT ); Fri, 16 Jun 2017 10:01:15 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:59077 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752723AbdFPOBN (ORCPT ); Fri, 16 Jun 2017 10:01:13 -0400 From: olivier moysan To: , , , , , , , , , , , , , CC: , Subject: [PATCH 1/2] dt-bindings: Document the STM32 SPDIFRX interface Date: Fri, 16 Jun 2017 15:57:31 +0200 Message-ID: <1497621452-615-2-git-send-email-olivier.moysan@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1497621452-615-1-git-send-email-olivier.moysan@st.com> References: <1497621452-615-1-git-send-email-olivier.moysan@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.201.23.16] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-06-16_08:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2232 Lines: 73 This adds documentation of device tree bindings for the STM32 SPDIFRX interface. Signed-off-by: olivier moysan --- .../devicetree/bindings/sound/st,stm32-spdifrx.txt | 56 ++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/st,stm32-spdifrx.txt diff --git a/Documentation/devicetree/bindings/sound/st,stm32-spdifrx.txt b/Documentation/devicetree/bindings/sound/st,stm32-spdifrx.txt new file mode 100644 index 0000000..33826f2 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/st,stm32-spdifrx.txt @@ -0,0 +1,56 @@ +STMicroelectronics STM32 S/PDIF receiver (SPDIFRX). + +The SPDIFRX peripheral, is designed to receive an S/PDIF flow compliant with +IEC-60958 and IEC-61937. + +Required properties: + - compatible: should be "st,stm32h7-spdifrx" + - reg: cpu DAI IP base address and size + - clocks: must contain an entry for kclk (used as S/PDIF signal reference) + - clock-names: must contain "kclk" + - interrupts: cpu DAI interrupt line + - dmas: DMA specifiers for audio data DMA and iec control flow DMA + See STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt + - dma-names: two dmas have to be defined, "rx" and "rx-ctrl" + +Optional properties: + - resets: Reference to a reset controller asserting the SPDIFRX + +The device node should contain one 'port' child node with one child 'endpoint' +node, according to the bindings defined in Documentation/devicetree/bindings/ +graph.txt. + +Example: +spdifrx: spdifrx@40004000 { + compatible = "st,stm32h7-spdifrx"; + reg = <0x40004000 0x400>; + clocks = <&rcc SPDIFRX_CK>; + clock-names = "kclk"; + interrupts = <97>; + dmas = <&dmamux1 2 93 0x400 0x0>, + <&dmamux1 3 94 0x400 0x0>; + dma-names = "rx", "rx-ctrl"; + pinctrl-0 = <&spdifrx_pins>; + pinctrl-names = "default"; + + spdifrx_port: port { + cpu_endpoint: endpoint { + remote-endpoint = <&codec_endpoint>; + }; + }; +}; + +spdif_in: spdif-in { + compatible = "linux,spdif-dir"; + + codec_port: port { + codec_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint>; + }; + }; +}; + +soundcard { + compatible = "audio-graph-card"; + dais = <&spdifrx_port>; +}; -- 1.9.1