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In some CPUs (i.e. MPC8569) QE shuts down completely during sleep, drivers may want to know that to reinitialize registers and buffer descriptors. This patch implements qe_alive_during_sleep() helper function, so far it just checks if MPC8569-compatible power management controller is present, which is a sign that QE turns off during sleep. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>