System clock systems to be twice as fast as RTC

[Subodh Nijsure]

I am running system with kernel 2.6.10 with following cpuinfo

sh-2.05b# cat /proc/cpuinfo
processor       : 0
cpu             : 440 in Virtex-5 FXT
clock           : 200MHz
revision        : 25.18 (pvr 7ff2 1912)
bogomips        : 296.96
machine         : Xilinx ML507 PPC440 evaluation board
plb bus clock   : 100MHz

The system clock seems to be running twice as as fast as RTC, 

sh-2.05b# date ; sleep 60 ; date
Fri Sep 11 01:37:11 UTC 1970
Fri Sep 11 01:37:41 UTC 1970
sh-2.05b# date ; sleep 60 ; date
Fri Sep 11 01:38:21 UTC 1970
Fri Sep 11 01:38:51 UTC 1970
sh-2.05b# date ; sleep 60 ; date
Fri Sep 11 01:38:59 UTC 1970
Fri Sep 11 01:39:29 UTC 1970

I have tried various values of CONFIG_HZ and that didn't help. Google
searches has shown up this issue on X86 system but not on PPC. Any hints as
to what I should be looking for? I have included relevant portion of config
file..


/Subodh



CONFIG_MMU=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_ASM_SEMAPHORES=y
CONFIG_HAVE_DEC_LOCK=y
CONFIG_PPC=y
CONFIG_PPC32=y
CONFIG_GENERIC_NVRAM=y
CONFIG_EXPERIMENTAL=y
CONFIG_CLEAN_COMPILE=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_LOCK_KERNEL=y
CONFIG_LOCALVERSION=""
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SEMMNI=128
CONFIG_SYSVIPC_SEMMSL=250
CONFIG_POSIX_MQUEUE=y
CONFIG_SYSCTL=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_HOTPLUG=y
CONFIG_KOBJECT_UEVENT=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_KALLSYMS=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SHMEM=y
CONFIG_CC_ALIGN_FUNCTIONS=0
CONFIG_CC_ALIGN_LABELS=0
CONFIG_CC_ALIGN_LOOPS=0
CONFIG_CC_ALIGN_JUMPS=0
CONFIG_LTT_MAX_HANDLES=128
CONFIG_LOCKLESS=y
CONFIG_BOOT_FLIGHT_BUFFERS=4
CONFIG_BOOT_FLIGHT_SIZE=524288
CONFIG_FLIGHT_PROC_BUFFERS=8
CONFIG_FLIGHT_PROC_SIZE=8192
CONFIG_NEWEV=y
CONFIG_CSTM=y
CONFIG_CREATE_DEV_CONSOLE=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_OBSOLETE_MODPARM=y
CONFIG_KMOD=y
CONFIG_44x=y
CONFIG_BOOKE=y
CONFIG_PTE_64BIT=y
CONFIG_PHYS_64BIT=y
CONFIG_MATH_EMULATION=y
CONFIG_4xx=y
CONFIG_XILINX_ML507=y
CONFIG_XILINX_OCP=y
CONFIG_XILINX_VIRTEX_5_FX=y
CONFIG_XILINX_VIRTEX=y
CONFIG_EMBEDDEDBOOT=y
CONFIG_PPC_GEN550=y
CONFIG_UART0_TTYS0=y
CONFIG_NOT_COHERENT_CACHE=y
CONFIG_PREEMPT_DESKTOP=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_BKL=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BINFMT_ELF=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyS0,9600n8 initrd=0x1800000,32M rw root=/dev/ram
ip=$(ipaddr)::(gatewayip):$(subnetmask)::eth0:none eth=$(ethaddr)"
<snip>