From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: [PATCH V2 3/5] ARM: DT: tegra114:add aliases and DMA requestor for serial controller Date: Mon, 11 Mar 2013 11:38:06 -0600 Message-ID: <513E167E.8030000@wwwdotorg.org> References: <1362852678-13421-1-git-send-email-ldewangan@nvidia.com> <1362852678-13421-4-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: <1362852678-13421-4-git-send-email-ldewangan@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: Laxman Dewangan Cc: linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, pdeschrijver@nvidia.com List-Id: linux-tegra@vger.kernel.org On 03/09/2013 11:11 AM, 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,tegra114-uart", > "nvidia,tegra20-uart" and APB DMA based driver will get enabled with > compatible "nvidia,tegra114-hsuart", "nvidia,tegra30-hsuart". > > Signed-off-by: Laxman Dewangan > --- > Changes from V1: > - Remove UARTB car id correction. Make the compatible with tegra114 and > tegra30 for hsuart and tegra20 for simple uart driver. Why the difference for the two drivers? Either the HW is compatible with all 3 of 114/30/20 (in which case you only need list 114/20 in the compatible value), or it's not compatible with either 30/20, since we already know that 30/20 are compatible with each-other (in which case you should only list 114 in the compatible property).