linux-kernel - Re: [PATCH 1/3] driver core & of: Mark of

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Message-ID: <CAL_JsqJQy7ob87=wPOLxn3X0fTrt2QhAEJ2nPTAmCMZqNZp+sw@mail.gmail.com>
Date:	Thu, 13 Feb 2014 13:15:13 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Pawel Moll <pawel.moll@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	lm-sensors@...sensors.org, "arm@...nel.org" <arm@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mike Turquette <mturquette@...aro.org>,
	Jean Delvare <jdelvare@...e.de>,
	Guenter Roeck <linux@...ck-us.net>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Grant Likely <grant.likely@...aro.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH 1/3] driver core & of: Mark of_nodes of added device as populated

On Tue, Feb 11, 2014 at 10:53 AM, Pawel Moll <pawel.moll@....com> wrote:
> In "Device Tree powered" systems, platform devices are usually
> massively populated with of_platform_populate() call, executed
> at some level of initcalls, either by generic architecture
> or by platform-specific code.
>
> There are situations though where certain devices must be
> created (and bound with drivers) before all the others.
> This presents small challenge in DT-driven systems, as
> devices explicitly created in early code would be created
> again by of_platform_populate().
>
> This patch tries to solve that issue in a generic way,
> adding a "populated" flag which is set in the device_node
> structure when a device is being created in the core.
> Later, of_platform_populate() skips such nodes (and
> its children) in a similar way to the non-available ones.
>
> Signed-off-by: Pawel Moll <pawel.moll@....com>
> ---
>  drivers/base/core.c       |  4 ++++
>  drivers/of/device.c       | 16 ++++++++++++++++
>  drivers/of/platform.c     |  6 ++++--
>  include/linux/of.h        |  6 ++++++
>  include/linux/of_device.h | 11 +++++++++++
>  5 files changed, 41 insertions(+), 2 deletions(-)

Go read Grant's and my comments from your last posting.

Rob
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