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7a5fe23879
Initialize the parent field of each generic clock by looking at the PM registers. This means that the genclock operations can always assume that the parent field is non-null, so they don't have to check. Also remove a few unnecessary BUG_ON()s. Extracted from a patch by David Brownell. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>