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| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2009-08-27 17:21:18 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-09-17 18:07:51 (GMT) |
| commit | a7bcb1ae6094db78b077ae17e92c69de7643014f (patch) | |
| tree | b59e32e51c84bcc69a9458fa8b7bc8d11286dea0 /arch | |
| parent | f7557dc8215a2e7eb22da583d03e1aef72c58b3c (diff) | |
| download | linux-a7bcb1ae6094db78b077ae17e92c69de7643014f.tar.xz | |
MIPS: Alchemy: override loops_per_jiffy detection
loops_per_jiffy depends on coreclk speed; preset it instead of
letting the kernel waste precious microseconds trying to approximate it.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/alchemy/common/setup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/setup.c b/arch/mips/alchemy/common/setup.c index 3f036b3..6184baa 100644 --- a/arch/mips/alchemy/common/setup.c +++ b/arch/mips/alchemy/common/setup.c @@ -27,6 +27,7 @@ #include <linux/init.h> #include <linux/ioport.h> +#include <linux/jiffies.h> #include <linux/module.h> #include <linux/pm.h> @@ -53,6 +54,9 @@ void __init plat_mem_setup(void) printk(KERN_INFO "(PRId %08x) @ %lu.%02lu MHz\n", read_c0_prid(), est_freq / 1000000, ((est_freq % 1000000) * 100) / 1000000); + /* this is faster than wasting cycles trying to approximate it */ + preset_lpj = (est_freq >> 1) / HZ; + _machine_restart = au1000_restart; _machine_halt = au1000_halt; pm_power_off = au1000_power_off; |