linux-kernel - Re: [PATCH 1/4] phy: miphy365x: Add Device Tree bindings for the MiPHY365x

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Date:	Tue, 24 Jun 2014 15:51:53 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Kishon Vijay Abraham I <kishon@...com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] phy: miphy365x: Add Device Tree bindings for the
 MiPHY365x

On Tue, 24 Jun 2014, Arnd Bergmann wrote:
> On Tuesday 24 June 2014 13:46:34 Lee Jones wrote:
> > > > > > converting all addresses to to resources so drivers can easily pull
> > > > > > them out using platform_get_resource() and friends.  Pushing the reg
> > > > > 
> > > > > right. Can't we use of_address_to_resource here?
> > > > 
> > > > We could, but that would be an extra layer.  We'd be pulling the
> > > > address, putting it into a resource, then pulling it from the resource
> > > > for use.  If we're going to be pulling addresses out manually, we're
> > > > probably better off using of_get_address().  But again, we're just
> > > > carrying out functionality which is already provided by the
> > > > framework.
> > > 
> > > there is also of_ioremap().
> > 
> > Isn't this SPARK only?  And doesn't it require a populated resource?  
> > Which is what I'm saying is the issue here i.e. we don't have one.
> 
> Sorry, I meant of_iomap(). I think it's only for historic reaons
> that we have both. Probably of_iomap started out on powerpc with
> the same intention as the sparc of_ioremap.
> 
> of_iomap does not require a resource, just an index.

Ah, this sounds like a better solution.  I'll have a play, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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