From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Genoud Subject: [PATCH v4 3/7] Documentation: DT: update atmel SSC with DMA binding Date: Tue, 9 Jul 2013 16:25:29 +0200 Message-ID: <1373379933-32749-4-git-send-email-richard.genoud@gmail.com> References: <1373372929-17800-1-git-send-email-richard.genoud@gmail.com> <1373379933-32749-1-git-send-email-richard.genoud@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1373379933-32749-1-git-send-email-richard.genoud-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: Mark Brown , Nicolas Ferre , Liam Girdwood , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Cc: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org, Lars-Peter Clausen , devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Bo Shen , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org As atmel-ssc can be used with DMA, the documentation should be updated. Also, a configuration DMA example is given. Signed-off-by: Richard Genoud --- .../devicetree/bindings/misc/atmel-ssc.txt | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt index 38e51ad..7c320da 100644 --- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt @@ -6,10 +6,28 @@ Required properties: - atmel,at91sam9g45-ssc: support dma transfer - reg: Should contain SSC registers location and length - interrupts: Should contain SSC interrupt +For dma transfer: +- dmas: DMA specifier, consisting of a phandle to DMA controller node, + the memory interface and SSC DMA channel ID (for tx and rx). + See Documentation/devicetree/bindings/dma/atmel-dma.txt for details. +- dma-names: Must be "tx", "rx". -Example: +Examples: ssc0: ssc@fffbc000 { compatible = "atmel,at91rm9200-ssc"; reg = <0xfffbc000 0x4000>; interrupts = <14 4 5>; }; + + +ssc0: ssc@f0010000 { + compatible = "atmel,at91sam9g45-ssc"; + reg = <0xf0010000 0x4000>; + interrupts = <28 4 5>; + dmas = <&dma0 1 13>, + <&dma0 1 14>; + dma-names = "tx", "rx"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; + status = "disabled"; +}; -- 1.7.10.4