diff options
Diffstat (limited to 'arch/arm/mach-ixp4xx/include/mach/timex.h')
| -rw-r--r-- | arch/arm/mach-ixp4xx/include/mach/timex.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/include/mach/timex.h b/arch/arm/mach-ixp4xx/include/mach/timex.h new file mode 100644 index 00000000..c9e930f2 --- /dev/null +++ b/arch/arm/mach-ixp4xx/include/mach/timex.h @@ -0,0 +1,16 @@ +/* + * arch/arm/mach-ixp4xx/include/mach/timex.h + * + */ + +#include <mach/hardware.h> + +/* + * We use IXP425 General purpose timer for our timer needs, it runs at + * 66.66... MHz. We do a convulted calculation of CLOCK_TICK_RATE b/c the + * timer register ignores the bottom 2 bits of the LATCH value. + */ +#define IXP4XX_TIMER_FREQ 66666000 +#define CLOCK_TICK_RATE \ + (((IXP4XX_TIMER_FREQ / HZ & ~IXP4XX_OST_RELOAD_MASK) + 1) * HZ) + |