linux-kernel - Re: [RFC PATCH 3/3] dt-bindings: pci: xgene pcie device tree bindings

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Message-Id: <201401111406.52935.arnd@arndb.de>
Date:	Sat, 11 Jan 2014 14:06:52 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Tanmay Inamdar <tinamdar@....com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Grant Likely <grant.likely@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Rob Landley <rob@...dley.net>, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-pci@...r.kernel.org,
	patches <patches@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jon Masters <jcm@...hat.com>
Subject: Re: [RFC PATCH 3/3] dt-bindings: pci: xgene pcie device tree bindings

On Saturday 11 January 2014, Tanmay Inamdar wrote:
> On Tue, Jan 7, 2014 at 7:35 AM, Arnd Bergmann <arnd@...db.de> wrote:
> > On Tuesday 07 January 2014, Tanmay Inamdar wrote:
> >> On Fri, Jan 3, 2014 at 1:49 AM, Arnd Bergmann <arnd@...db.de> wrote:

> >> >
> >> > Better use an anonymous clock?
> >>
> >> Sorry. Can you please elaborate?
> >
> > I mean drop the "clock-names" property.
> >
> Did you mean clock-names in pcie-clock node or pcie node? I can drop
> clock-names from pcie clock node. However if I drop clock-names from
> pcie node, then clk_get call from pcie host driver would result in
> failure. Right?

I meant drop it from the pcie node, and change the clk_get call
to pass NULL instead of the name, which will get the handle for
the only clock provided. You only need clock-names if you have
more than one clock in the device node and want to identify them.

The pcie-clock node should not have a "clock-names" property at
all, unless it has a "clocks" property as well and refers to
its clock parent with it.

I already noticed in another review that the xgene clocks get this
part wrong and that should be fixed for all those clock provides,
but it's unrelated to what I was talking about here.

	Arnd
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