From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752933AbdGFMVw (ORCPT ); Thu, 6 Jul 2017 08:21:52 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:62555 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752913AbdGFMVt (ORCPT ); Thu, 6 Jul 2017 08:21:49 -0400 From: Pierre-Yves MORDRET To: Vinod Koul , Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre Torgue , Russell King , Dan Williams , "M'boumba Cedric Madianga" , Fabrice GASNIER , Herbert Xu , Fabien DESSENNE , Amelie Delaunay , Pierre-Yves MORDRET , , , , Subject: [PATCH v3 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX Date: Thu, 6 Jul 2017 14:20:21 +0200 Message-ID: <1499343623-5964-4-git-send-email-pierre-yves.mordret@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1499343623-5964-1-git-send-email-pierre-yves.mordret@st.com> References: <1499343623-5964-1-git-send-email-pierre-yves.mordret@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG7NODE1.st.com (10.75.127.19) To SFHDAG5NODE2.st.com (10.75.127.14) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-07-06_05:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds an optional property needed for STM32 DMA controller addressed via STM32 DMAMUX. Signed-off-by: M'boumba Cedric Madianga Signed-off-by: Pierre-Yves MORDRET --- Version history: v3: * None v2: * Typo fix --- --- Documentation/devicetree/bindings/dma/stm32-dma.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/dma/stm32-dma.txt b/Documentation/devicetree/bindings/dma/stm32-dma.txt index 4408af6..340c918 100644 --- a/Documentation/devicetree/bindings/dma/stm32-dma.txt +++ b/Documentation/devicetree/bindings/dma/stm32-dma.txt @@ -16,6 +16,9 @@ Optional properties: - resets: Reference to a reset controller asserting the DMA controller - st,mem2mem: boolean; if defined, it indicates that the controller supports memory-to-memory transfer +- st,dmamux: boolean; if defined, it indicates that the controller is behind a + DMA multiplexer. In that case, using dma instances doesn't work for DMA + clients. They have to use dma-router instances. Example: @@ -39,7 +42,7 @@ Example: * DMA client DMA clients connected to the STM32 DMA controller must use the format -described in the dma.txt file, using a five-cell specifier for each +described in the dma.txt file, using a four-cell specifier for each channel: a phandle to the DMA controller plus the following four integer cells: 1. The channel id -- 2.7.4