Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757192AbdLXEmO (ORCPT ); Sat, 23 Dec 2017 23:42:14 -0500 Received: from 1.mo69.mail-out.ovh.net ([178.33.251.173]:41427 "EHLO 1.mo69.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753008AbdLXEmL (ORCPT ); Sat, 23 Dec 2017 23:42:11 -0500 From: Cyrille Pitchen To: computersforpeace@gmail.com, dwmw2@infradead.org, richard@nod.at, boris.brezillon@free-electrons.com, marek.vasut@gmail.com, linux-mtd@lists.infradead.org, broonie@kernel.org, vigneshr@ti.com, linux@armlinux.org.uk Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, robh@kernel.org, devicetree@vger.kernel.org, nicolas.ferre@microchip.com, radu.pirea@microchip.com, Cyrille Pitchen Subject: [PATCH 2/3] dt-bindings: mtd: atmel-quadspi: add an optional property 'dmacap,memcpy' Date: Sun, 24 Dec 2017 05:36:05 +0100 Message-Id: <143542c61ca674d53da4985bbabc142e8e6ebefc.1514087323.git.cyrille.pitchen@wedev4u.fr> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: X-Ovh-Tracer-Id: 3380514470344349662 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 25 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedtuddrhedugddulecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemuceftddtnecuogfthfevqddqjfgurhdqufhushhpvggtthdqlhhoficuldehmdenogfthfevqddqjfgurhdqufhushhpvggtthculddvtddm Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1171 Lines: 35 The optional 'dmacap,memcpy' DT property tells the Atmel QSPI controller driver to reserve some DMA channel then to use it to perform DMA memcpy() during data transfers. This feature relies on the generic bounce buffer helper from spi-nor.c. Signed-off-by: Cyrille Pitchen --- Documentation/devicetree/bindings/mtd/atmel-quadspi.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt b/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt index b93c1e2f25dd..002d3f0a445b 100644 --- a/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt +++ b/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt @@ -12,6 +12,10 @@ Required properties: - #address-cells: Should be <1>. - #size-cells: Should be <0>. +Optional properties: +- dmacap,memcpy: Reserve a DMA channel to perform DMA memcpy() between the + system memory and the QSPI mapped memory. + Example: spi@f0020000 { @@ -24,6 +28,7 @@ spi@f0020000 { #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_spi0_default>; + dmacap,memcpy; m25p80@0 { ... -- 2.11.0