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authorKumar Gala <galak@kernel.crashing.org>2008-04-21 09:28:36 -0500
committerWolfgang Denk <wd@denx.de>2008-04-24 15:42:35 +0200
commit022f12163595b9a55380c6d77c3119b93d6a9a4b (patch)
tree12e45edf11ffbfc0028a6dbf436bae23c2229827 /cpu/mpc85xx/cpu.c
parent0aa88c82667b9241107d7a0248c341db877e7e76 (diff)
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85xx: Round up frequency calculations to get reasonable output
eg. because of rounding error we can get 799Mhz instead of 800Mhz. Introduced DIV_ROUND_UP and roundup taken from linux kernel. Signed-off-by: Dejan Minic <minic@freescale.com> Signed-off-by: Srikanth Srinivasan <srikanth.srinivasan@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'cpu/mpc85xx/cpu.c')
-rw-r--r--cpu/mpc85xx/cpu.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
index dcd8817..74b210c 100644
--- a/cpu/mpc85xx/cpu.c
+++ b/cpu/mpc85xx/cpu.c
@@ -116,22 +116,21 @@ int checkcpu (void)
get_sys_info(&sysinfo);
puts("Clock Configuration:\n");
- printf(" CPU:%4lu MHz, ", sysinfo.freqProcessor / 1000000);
- printf("CCB:%4lu MHz,\n", sysinfo.freqSystemBus / 1000000);
-
+ printf(" CPU:%4lu MHz, ", DIV_ROUND_UP(sysinfo.freqProcessor,1000000));
+ printf("CCB:%4lu MHz,\n", DIV_ROUND_UP(sysinfo.freqSystemBus,1000000));
ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9;
switch (ddr_ratio) {
case 0x0:
printf(" DDR:%4lu MHz (%lu MT/s data rate), ",
- sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
+ DIV_ROUND_UP(sysinfo.freqDDRBus,2000000), DIV_ROUND_UP(sysinfo.freqDDRBus,1000000));
break;
case 0x7:
printf(" DDR:%4lu MHz (%lu MT/s data rate) (Synchronous), ",
- sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
+ DIV_ROUND_UP(sysinfo.freqDDRBus, 2000000), DIV_ROUND_UP(sysinfo.freqDDRBus, 1000000));
break;
default:
printf(" DDR:%4lu MHz (%lu MT/s data rate) (Asynchronous), ",
- sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
+ DIV_ROUND_UP(sysinfo.freqDDRBus, 2000000), DIV_ROUND_UP(sysinfo.freqDDRBus,1000000));
break;
}
@@ -154,7 +153,7 @@ int checkcpu (void)
clkdiv *= 2;
#endif
printf("LBC:%4lu MHz\n",
- sysinfo.freqSystemBus / 1000000 / clkdiv);
+ DIV_ROUND_UP(sysinfo.freqSystemBus, 1000000) / clkdiv);
} else {
printf("LBC: unknown (lcrr: 0x%08x)\n", lcrr);
}