XCLK_MASK         120 drivers/tty/serial/ip22zilog.h #define XCLK_MASK	0xC0
XCLK_MASK         210 drivers/tty/serial/pmac_zilog.h #define XCLK_MASK	0xC0
XCLK_MASK         112 drivers/tty/serial/sunzilog.h #define XCLK_MASK	0xC0
XCLK_MASK         139 drivers/tty/serial/zs.h #define XCLK_MASK	0xc0