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| author | Kumar Gala <galak@kernel.crashing.org> | 2008-04-21 09:28:36 -0500 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-04-24 15:42:35 +0200 |
| commit | 022f12163595b9a55380c6d77c3119b93d6a9a4b (patch) | |
| tree | 12e45edf11ffbfc0028a6dbf436bae23c2229827 /cpu/mpc85xx/cpu.c | |
| parent | 0aa88c82667b9241107d7a0248c341db877e7e76 (diff) | |
| download | u-boot-imx-022f12163595b9a55380c6d77c3119b93d6a9a4b.zip u-boot-imx-022f12163595b9a55380c6d77c3119b93d6a9a4b.tar.gz u-boot-imx-022f12163595b9a55380c6d77c3119b93d6a9a4b.tar.bz2 | |
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.c | 13 |
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); } |