linux-kernel - Re: [PATCH 11/13] arm: dts: dra7: add DMA properties for UART

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Message-ID: <20141105162024.GH24112@csclub.uwaterloo.ca>
Date:	Wed, 5 Nov 2014 11:20:24 -0500
From:	"Lennart Sorensen" <lsorense@...lub.uwaterloo.ca>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	tony@...mide.com, balbi@...com, gregkh@...uxfoundation.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 11/13] arm: dts: dra7: add DMA properties for UART

On Wed, Nov 05, 2014 at 10:33:15AM -0500, Lennart Sorensen wrote:
> Two systems ran 16 hours each so far with no issues.  Pushed 170MB of
> data through the pair of serial ports on one system at 230400.

The console on uart3 doesn't appear to be using the dma assuming the
values in /sys for the dma controller and bytes transferred mean anything.
It does mention in dmesg that it allocated dma channels for uart3 though.

How do you tell if it is using dma?

-- 
Len Sorensen
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