From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Cherian Subject: Re: [PATCH] ARM: dts: am33xx: fix DMA support for the second USB interface Date: Mon, 28 Apr 2014 19:55:51 +0530 Message-ID: <535E64EF.2020108@ti.com> References: <1398674237-4129-1-git-send-email-yegorslists@googlemail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1398674237-4129-1-git-send-email-yegorslists@googlemail.com> Sender: linux-omap-owner@vger.kernel.org To: yegorslists@googlemail.com, linux-omap@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, tony@atomide.com List-Id: devicetree@vger.kernel.org On 4/28/2014 2:07 PM, yegorslists@googlemail.com wrote: > From: Yegor Yefremov > > This patch creates unique DMA channels for the second USB > interface, otherwise the second USB interface is not usable > at all. MUSB_DMA_NUM_CHANNELS is 15, so if you pass any dma-names > 15 (> rx15/tx15), the dma_controller_create in musb_core.c fails and it falls back to PIO mode. > > Signed-off-by: Yegor Yefremov > --- > arch/arm/boot/dts/am33xx.dtsi | 12 ++++++------ > 1 files changed, 6 insertions(+), 6 deletions(-) > > diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi > index 07f283c..e04cbbc 100644 > --- a/arch/arm/boot/dts/am33xx.dtsi > +++ b/arch/arm/boot/dts/am33xx.dtsi > @@ -548,12 +548,12 @@ > &cppi41dma 26 1 &cppi41dma 27 1 > &cppi41dma 28 1 &cppi41dma 29 1>; > dma-names = > - "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7", > - "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", > - "rx14", "rx15", > - "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7", > - "tx8", "tx9", "tx10", "tx11", "tx12", "tx13", > - "tx14", "tx15"; > + "rx16", "rx17", "rx18", "rx19", "rx20", "rx21", "rx22", > + "rx23", "rx24", "rx25", "rx26", "rx27", "rx28", > + "rx29", "rx30", > + "tx16", "tx17", "tx18", "tx19", "tx20", "tx21", "tx22", > + "tx23", "tx24", "tx25", "tx26", "tx27", "tx28", > + "tx29", "tx30"; > }; > > cppi41dma: dma-controller@47402000 { -- -George