From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759025Ab3G3KdE (ORCPT ); Tue, 30 Jul 2013 06:33:04 -0400 Received: from mail-wi0-f176.google.com ([209.85.212.176]:52304 "EHLO mail-wi0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758687Ab3G3Kcf (ORCPT ); Tue, 30 Jul 2013 06:32:35 -0400 From: Richard Genoud To: Mark Brown , Nicolas Ferre , Liam Girdwood , Stephen Warren Cc: Bo Shen , Lars-Peter Clausen , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, patches@opensource.wolfsonmicro.com, Richard Genoud Subject: [PATCH v6 3/8] Documentation: DT: update atmel SSC with DMA binding Date: Tue, 30 Jul 2013 12:32:04 +0200 Message-Id: <1375180329-4860-4-git-send-email-richard.genoud@gmail.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1375180329-4860-1-git-send-email-richard.genoud@gmail.com> References: <1375180329-4860-1-git-send-email-richard.genoud@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@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 | 23 +++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt index 38e51ad..a45ae08 100644 --- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt @@ -7,9 +7,30 @@ Required properties: - reg: Should contain SSC registers location and length - interrupts: Should contain SSC interrupt -Example: + +Required properties for devices compatible with "atmel,at91sam9g45-ssc": +- 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". + +Examples: +- PDC transfer: ssc0: ssc@fffbc000 { compatible = "atmel,at91rm9200-ssc"; reg = <0xfffbc000 0x4000>; interrupts = <14 4 5>; }; + +- DMA transfer: +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