From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: [PATCH] ARM: tegra: dts: add aliases and DMA requestor for serial controller Date: Wed, 19 Dec 2012 10:00:59 -0700 Message-ID: <50D1F2CB.3090206@wwwdotorg.org> References: <1355898671-3960-1-git-send-email-ldewangan@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1355898671-3960-1-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Laxman Dewangan Cc: linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-tegra@vger.kernel.org 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.