linux-kernel - Re: [PATCH] ARM: tegra: dts: add aliases and DMA requestor for serial controller

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Message-ID: <50D1F2CB.3090206@wwwdotorg.org>
Date:	Wed, 19 Dec 2012 10:00:59 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
CC:	linux@....linux.org.uk, linux-tegra@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: tegra: dts: add aliases and DMA requestor for serial
 controller

On 12/18/2012 11:31 PM, Laxman Dewangan wrote:
> Add APB DMA requestor and serial aliases for serial controller.
> There will be two serial driver i.e. 8250 based simple serial driver
> and APB DMA based serial driver for higher baudrate and performace.
> 
> The simple serial driver get enabled with compatible nvidia,tegra20-uart
> and APB DMA based driver will get enabled with compatible
> nvidia,tegra20-hsuart.

This patch seems to do two things:

1) Add a comment describing how to select the basic or DMA-based driver.
I can see why this is useful.

2) Add aliases for the serial ports. I have no idea why this is useful.
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