From: George Cherian <george.cherian@ti.com>
To: yegorslists@googlemail.com, linux-omap@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
tony@atomide.com
Subject: Re: [PATCH] ARM: dts: am33xx: fix DMA support for the second USB interface
Date: Mon, 28 Apr 2014 19:55:51 +0530 [thread overview]
Message-ID: <535E64EF.2020108@ti.com> (raw)
In-Reply-To: <1398674237-4129-1-git-send-email-yegorslists@googlemail.com>
On 4/28/2014 2:07 PM, yegorslists@googlemail.com wrote:
> From: Yegor Yefremov <yegorslists@googlemail.com>
>
> 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 <yegorslists@googlemail.com>
> ---
> 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
next prev parent reply other threads:[~2014-04-28 14:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-28 8:37 [PATCH] ARM: dts: am33xx: fix DMA support for the second USB interface yegorslists
2014-04-28 14:25 ` George Cherian [this message]
2014-04-28 16:17 ` Yegor Yefremov
2014-04-29 4:31 ` George Cherian
2014-04-29 6:16 ` Yegor Yefremov
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