[PATCH v3] of: Keep track of populated platform devices

On Tue, 13 May 2014 07:24:50 -0500, Rob Herring [off-list ref] wrote:

On Tue, May 13, 2014 at 6:48 AM, Pawel Moll [off-list ref] wrote:

quoted

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 a challenge, as devices created explicitly
would be created again by of_platform_populate().

This patch tries to solve that issue in a generic way,
adding a "populated" flag for a DT node description.
Once set, this device will never be created again via
of_* API, so of_platform_populate() will skip such nodes
(and its children) in a similar way to the non-available
ones.

The flag is cleared when a device is being removed and
returns the DT node by calling of_device_node_put() (it
was missing from the amba device release function, added).

Signed-off-by: Pawel Moll <redacted>

A few formatting nits, but otherwise:

Reviewed-by: Rob Herring <robh@kernel.org>

Acked-by: Grant Likely <redacted>

g.