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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-04-02 11:32:11 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-04-02 13:40:15 +0200 |
| commit | 8bb00ace5090804804f6011a02e097176fa63bb8 (patch) | |
| tree | 53efdb2189daab1802eb62a11f879ce787ddf03c /c/src/lib/libbsp/powerpc/gen5200 | |
| parent | bsp/gen83xx: Support cache BSP options (diff) | |
| download | rtems-8bb00ace5090804804f6011a02e097176fa63bb8.tar.bz2 | |
bsps: More accurate PowerPC clock driver
The clock driver used previously the bsp_clicks_per_usec value. For a
33333333Hz time base frequency this leads to a relative error of one per
cent for example due to integer truncation.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/gen5200')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/gen5200/startup/bspstart.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/c/src/lib/libbsp/powerpc/gen5200/startup/bspstart.c b/c/src/lib/libbsp/powerpc/gen5200/startup/bspstart.c index 16d541a6de..ef948fcd89 100644 --- a/c/src/lib/libbsp/powerpc/gen5200/startup/bspstart.c +++ b/c/src/lib/libbsp/powerpc/gen5200/startup/bspstart.c @@ -105,10 +105,11 @@ #include <bsp/irq-generic.h> #include <bsp/mpc5200.h> -/* - * Driver configuration parameters - */ -uint32_t bsp_clicks_per_usec; +/* Configuration parameter for clock driver */ +uint32_t bsp_time_base_frequency; + +/* Legacy */ +uint32_t bsp_clicks_per_usec; void BSP_panic(char *s) { @@ -157,6 +158,7 @@ void bsp_start(void) mpc5200.config = xlb_cfg; } + bsp_time_base_frequency = XLB_CLOCK / 4; bsp_clicks_per_usec = (XLB_CLOCK/4000000); /* |