tree 2d43f255259ccf26b11187f9c9e02b2548caaa96
parent 6d5977375f5ca0a8676c6337e465bf7c92f3a765
author Lei YU <mine260309@gmail.com> 1572340936 +0800
committer Shawn McCarney <shawnmm@us.ibm.com> 1575476021 +0000

power-utils: Initially add isReadyToUpdate

Initially add isReadyToUpdate() that checks the pre-condition for PSU
update.
For now it only checks the power state and return false if power is on.

When it is not ready to update, there is no need to unbind/bind the
driver, so move the unbind/bind calls into doUpdate() from ctor/dtor.

Tested: Verify it returns and logs "PSU not ready to update" when power
        is on, and continues the update when power is off.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: I1cbb454baf735ceb3de883a7317753d46485696f