The loops_per_jiffy detection in generic calibrate_delay is a bit off
(by ~0.5% usually); calculate the correct value based on detected core
clock. BogoMIPS value will now reflect cpu core clock correctly.
(Blatantly stolen from the SH port).
Signed-off-by: Manuel Lauss <manuel.lauss@xxxxxxxxx>
---
arch/mips/Kconfig | 2 +-
arch/mips/alchemy/common/setup.c | 11 +++++++++++
2 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 3ca0fe1..56c8139 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -700,7 +700,7 @@ config GENERIC_HWEIGHT
config GENERIC_CALIBRATE_DELAY
bool
- default y
+ default y if !MACH_ALCHEMY
config GENERIC_CLOCKEVENTS
bool
diff --git a/arch/mips/alchemy/common/setup.c b/arch/mips/alchemy/common/setup.c
index 3f036b3..5ea7e1a 100644
--- a/arch/mips/alchemy/common/setup.c
+++ b/arch/mips/alchemy/common/setup.c
@@ -74,6 +74,17 @@ void __init plat_mem_setup(void)
iomem_resource.end = IOMEM_RESOURCE_END;
}
+void __cpuinit calibrate_delay(void)
+{
+ loops_per_jiffy = (get_au1x00_speed() >> 1) / HZ;
+
+ printk(KERN_INFO "Calibrating delay loop (skipped)... "
+ "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
+ loops_per_jiffy/(500000/HZ),
+ (loops_per_jiffy/(5000/HZ)) % 100,
+ loops_per_jiffy);
+}
+
#if defined(CONFIG_64BIT_PHYS_ADDR)
/* This routine should be valid for all Au1x based boards */
phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
--
1.6.3.3
