TIMER_BASE         82 drivers/staging/comedi/drivers/cb_pcidas64.c #define TIMER_BASE 25		/*  40MHz master clock */
TIMER_BASE        112 drivers/staging/comedi/drivers/gsc_hpdi.c #define TIMER_BASE				50	/* 20MHz master clock */
TIMER_BASE        247 drivers/staging/comedi/drivers/ni_pcidio.c #define TIMER_BASE 50		/* nanoseconds */