Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752507AbaLSQTN (ORCPT ); Fri, 19 Dec 2014 11:19:13 -0500 Received: from fw-tnat.cambridge.arm.com ([217.140.96.140]:36553 "EHLO cam-smtp0.cambridge.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751142AbaLSQTI (ORCPT ); Fri, 19 Dec 2014 11:19:08 -0500 From: Andrew Jackson To: Jaroslav Kysela , Takashi Iwai Cc: Liam Girdwood , Mark Brown , Rajeev Kumar , Andrew Jackson , Liviu Dudau , Lars-Peter Clausen , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 5/5] ASoC: dwc: Add documentation for I2S DT Date: Fri, 19 Dec 2014 16:18:09 +0000 Message-Id: <2842090b2c7a8a98aed0cfa02addcef0b2e8ec6b.1418826016.git.Andrew.Jackson@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrew Jackson Add documentation for Designware I2S hardware block. The block requires two clocks (one for audio sampling, the other for APB) and DMA channels for receive and transmit. Signed-off-by: Andrew Jackson --- .../devicetree/bindings/sound/designware-i2s.txt | 32 ++++++++++++++++++++ 1 files changed, 32 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/sound/designware-i2s.txt diff --git a/Documentation/devicetree/bindings/sound/designware-i2s.txt b/Documentation/devicetree/bindings/sound/designware-i2s.txt new file mode 100644 index 0000000..cdee591 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/designware-i2s.txt @@ -0,0 +1,32 @@ +DesignWare I2S controller + +Required properties: + - compatible : Must be "snps,designware-i2s" + - reg : Must contain I2S core's registers location and length + - clocks : Pairs of phandle and specifier referencing the controller's clocks. + The controller expects two clocks, the clock used for the APB interface and + the clock used as the sampling rate reference clock sample. + - clock-names : "apb_plck" for the clock to the APB interface, "i2sclk" for the sample + rate reference clock. + - dmas: Pairs of phandle and specifier for the DMA channels that are used by + the core. The core expects one or two dma channels, one for transmit and one for + receive. + - dma-names : "tx" for the transmit channel, "rx" for the receive channel. + +For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties +please check: + * resource-names.txt + * clock/clock-bindings.txt + * dma/dma.txt + +Example: + + soc_i2s: i2s@7ff90000 { + compatible = "snps,designware-i2s"; + reg = <0x0 0x7ff90000 0x0 0x1000>; + clocks = <&scpi_i2sclk 0>, <&soc_refclk100mhz>; + clock-names = "i2sclk", "apb_pclk"; + #sound-dai-cells = <0>; + dmas = <&dma0 5>; + dma-names = "tx"; + }; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/