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

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Date:	Fri, 04 May 2012 10:50:19 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Hiroshi Doyu <hdoyu@...dia.com>
CC:	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
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	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCHv3 1/4] ARM: tegra: Add Tegra AHB driver

On 05/04/2012 12:40 AM, Hiroshi Doyu wrote:
> 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?

Personally, I prefer to name files using the exact compatible value of
the first SoC version that introduced the HW. This allows e.g.
"tegra40-ahb.txt" to be introduced without making "tegra-ahb.txt" no
longer fully general.
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