linux-kernel - Re: [PATCH v3 0/7] of: setup dma parameters using dma-ranges and dma-coherent

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Message-ID: <538C9E3C.2000103@ti.com>
Date:	Mon, 2 Jun 2014 11:54:36 -0400
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	Arnd Bergmann <arnd@...db.de>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	Shawn Guo <shawn.guo@...escale.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Strashko, Grygorii" <grygorii.strashko@...com>,
	Russell King <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Olof Johansson <olof@...om.net>,
	Rob Herring <robh+dt@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Grant Likely <grant.likely@...aro.org>
Subject: Re: [PATCH v3 0/7] of: setup dma parameters using dma-ranges and
 dma-coherent

Arnd,

On Monday 02 June 2014 11:06 AM, Arnd Bergmann wrote:
> On Monday 02 June 2014 09:24:50 Santosh Shilimkar wrote:
>> On Monday 02 June 2014 02:37 AM, Shawn Guo wrote:
>>> On Thu, Apr 24, 2014 at 11:30:00AM -0400, Santosh Shilimkar wrote:
>>>> Here is an updated v3 of the series. Series introduces support for setting up
>>>> dma parameters based on device tree properties like 'dma-ranges' and
>>>> 'dma-coherent' and also update to ARM 32 bit port. Earlier version of the
>>>> series can be found here [3], [2] and [1].
>>>
>>> Are these two generic device tree properties documented somewhere under
>>> Documentation/devicetree/bindings?
>>>
>> These bindings have been already in use before this series. But looks like
>> they have not been documented. I will do a patch to add description for those
>> couple of parameters.
> 
> dma-ranges is part of ePAPR, and was documented in some ieee-1275 addenda
> before that, but I agree it would be nice to have something in kernel as
> well, at the minimum something pointing to the relevant documents.
> 
We are thinking of updating 'Documentation/devicetree/bindings/dma/dma.txt'
to add the information for these extra two parameters.

Is that fine or any other suggestion ?

Regards,
Santosh

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