genalloc: add devres support, allow to find a managed pool by device

This patch adds three exported functions to lib/genalloc.c:
devm_gen_pool_create, dev_get_gen_pool, and of_get_named_gen_pool.

devm_gen_pool_create is a managed version of gen_pool_create that keeps
track of the pool via devres and allows the management code to
automatically destroy it after device removal.

dev_get_gen_pool retrieves the gen_pool for a given device, if it was
created with devm_gen_pool_create, using devres_find.

of_get_named_gen_pool retrieves the gen_pool for a given device node and
property name, where the property must contain a phandle pointing to a
platform device node.  The corresponding platform device is then fed into
dev_get_gen_pool and the resulting gen_pool is returned.

[[email protected]: make the of_get_named_gen_pool() stub static, fixing a zillion link errors]
[[email protected]: squish "struct device declared inside parameter list" warning]
Signed-off-by: Philipp Zabel <[email protected]>
Acked-by: Grant Likely <[email protected]>
Tested-by: Michal Simek <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: Dong Aisheng <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Paul Gortmaker <[email protected]>
Cc: Javier Martin <[email protected]>
Cc: Huang Shijie <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions