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Power management on of NoC(Notwork On Chip) requires that disconnect and reconnect routine should been done during clk disable/enable. also there are different types of clocks, For NoC Macro clocks, write idle_bit and wait for hardward ACK; For Socket clocks, write idle_bit; For others, do nothing. Signed-off-by: Guo Zeng <Guo.Zeng@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>