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For read-write registers introduce accessor functions that simplify the task of modifying a subset of bits within the register. set_* functions set bits to 1, clear_* functions clear bits to 0 & change_* functions set bits specified in a mask to an arbitrary value. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17004/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>