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authorPawel Moll <pawel.moll@arm.com>2014-05-15 16:55:24 +0100
committerPawel Moll <pawel.moll@arm.com>2014-05-15 17:02:14 +0100
commitc6e126de43e7d4abfd6cf796b40589db3a046167 (patch)
tree78db63df172516da22235bed2c30544a69fc20bd /arch
parentd6d211db37e75de2ddc3a4f979038c40df7cc79c (diff)
downloadlinux-c6e126de43e7d4abfd6cf796b40589db3a046167.tar.gz
of: Keep track of populated platform devices
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. Subsequent of_platform_populate() will skip such nodes (and its children) in a similar way to the non-available ones. This patch also adds of_platform_depopulate() as an operation complementary to the _populate() one. It removes a platform or an amba device populated from the Device Tree, together with its all children (leaving, however, devices without associated of_node untouched) clearing the "populated" flag on the way. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
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