linux-kernel - Re: [PATCHv3 1/4] ARM: tegra: Add Tegra AHB driver

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Date:	Fri, 4 May 2012 08:40:30 +0200
From:	Hiroshi Doyu <hdoyu@...dia.com>
To:	"swarren@...dotorg.org" <swarren@...dotorg.org>
CC:	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"balbi@...com" <balbi@...com>, "arnd@...db.de" <arnd@...db.de>,
	"ccross@...roid.com" <ccross@...roid.com>,
	"olof@...om.net" <olof@...om.net>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"ohad@...ery.com" <ohad@...ery.com>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"linville@...driver.com" <linville@...driver.com>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCHv3 1/4] ARM: tegra: Add Tegra AHB driver

From: Stephen Warren <swarren@...dotorg.org>
Subject: Re: [PATCHv3 1/4] ARM: tegra: Add Tegra AHB driver
Date: Thu, 3 May 2012 19:59:33 +0200
Message-ID: <4FA2C785.2080703@...dotorg.org>

> On 05/03/2012 10:05 AM, Hiroshi DOYU wrote:
> > Tegra AHB Bus conforms to the AMBA Specification (Rev 2.0) Advanced
> > High-performance Bus (AHB) architecture.
> > 
> > The AHB Arbiter controls AHB bus master arbitration. This effectively
> > forms a second level of arbitration for access to the memory
> > controller through the AHB Slave Memory device. The AHB pre-fetch
> > logic can be configured to enhance performance for devices doing
> > sequential access. Each AHB master is assigned to either the high or
> > low priority bin. Both Tegra20/30 have this AHB bus.
> > 
> > Some of configuration param could be passed from DT too.
> 
> This patch should add
> Documentation/devicetree/bindings/arm/tegra/tegra20-ahb.txt to describe
> the DT binding.

>From 'dts' POV, there's no difference between tegra20 and
tegra30. They just have a register range. Is
"../bindings/arm/tegra/tegra-ahb.txt" ok, instead of having both
tegra{20,30}-ahb.txt?
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