component: allow missing unbind callback
The component framework reuses the devres managed functions. There is no need to specify an unbind() callback if the driver only wants to release the devres managed resources. The bind/unbind is like the probe/remove pair. The bind/probe is necessary and the unbind/remove is optional. Signed-off-by:Marco Felsch <m.felsch@pengutronix.de> Reviewed-by:
Philipp Zabel <p.zabel@pengutronix.de> Link: https://lore.kernel.org/r/20200227104547.30085-1-m.felsch@pengutronix.deSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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