Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-ixp4xx/timex.h |
| 3 | * |
| 4 | */ |
| 5 | |
| 6 | #include <asm/hardware.h> |
| 7 | |
| 8 | /* |
| 9 | * We use IXP425 General purpose timer for our timer needs, it runs at |
Deepak Saxena | 9138dcc | 2005-08-23 13:30:29 -0700 | [diff] [blame] | 10 | * 66.66... MHz. We do a convulted calculation of CLOCK_TICK_RATE b/c the |
| 11 | * timer register ignores the bottom 2 bits of the LATCH value. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
Deepak Saxena | 9138dcc | 2005-08-23 13:30:29 -0700 | [diff] [blame] | 13 | #define FREQ 66666666 |
| 14 | #define CLOCK_TICK_RATE (((FREQ / HZ & ~IXP4XX_OST_RELOAD_MASK) + 1) * HZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |