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@xxxxxxxxx>
---
V2: no need to exclude MACH_ALCHEMY from GENERIC_CALIBRATE_DELAY
setting preset_lpj early is enough.
As always, run-tested on DB1200 and another Au1200 system.
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;
--
1.6.4
