From a7bcb1ae6094db78b077ae17e92c69de7643014f Mon Sep 17 00:00:00 2001 From: Manuel Lauss <manuel.lauss@googlemail.com> Date: Thu, 27 Aug 2009 19:21:18 +0200 Subject: 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> --- arch/mips/alchemy/common/setup.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/mips') diff --git a/arch/mips/alchemy/common/setup.c b/arch/mips/alchemy/common/setup.c index 3f036b3d400e..6184baa56786 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; -- cgit v1.2.3