powerpc board without RTC

["Callebaut, Benoît"]

Hello,
Don't comment out the time_init() in start_kernel(). Instead change the
content of the calibrate_decr() function to set the variable set in it on a
fixed falue.
You must find this value by yourself but a good starting point is your
frequency in Hz (I think)
Example of the code
	unsigned int freq = 28000000;
	tb_tick_per_jiffy = freq/HZ;
	tb_to_us = mulhwu_scale_factor(freq,1000000);

and don't forget to set in platform_init()
ppc_md.time_init = NULL;
ppc_md.set_rtc_time = NULL;
ppc_md.get_rtc_time = NULL;
ppc_md.calibrate_decr = calibrate_decr();	/name of your
calibrate_decr() function

-----Original Message-----
From: Yu Bo-BOYU1 [mailto:Bo.Yu at motorola.com]
Sent: Sunday, February 02, 2003 10:33 PM
To: 'linuxppc-embedded at lists.linuxppc.org'
Subject: powerpc board without RTC



Hello,

I had a custom 7410 board without RTC. Therefore, I commented out
time_init() in start_kernel(). Is this acceptable for linux ?

>From the startup log of linux, it hang in calibrate_delay() which I think
it is related to RTC.

Any recommendation how I should do to avoid RTC. I really don't care
about time of day stuff except the system tick.



Loading... 618940
Starting at 0x800000...

loaded at:     00800000 008971BC
zimage at:     00805870 00893F33
avail ram:     00400000 00800000

Linux/PPC load:
Uncompressing Linux...done.
Now booting the kernel
Memory BAT mapping: BAT2=64Mb, BAT3=0Mb, residual: 0Mb
Total memory = 64MB; using 128kB for hash table (at c0180000)
Linux version 2.4.17_mvl21 (root at ibm-t30) (gcc version 2.95.3 20010315
(release/
MontaVista)) #41 Sun Feb 2 15:18:05 CST 2003
Host bridge init okay
Motorola SPS Sandpoint Test Platform
Sandpoint port (C) 2000, 2001 MontaVista Software, Inc. (source at mvista.com)
On node 0 totalpages: 16384
zone(0): 16384 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line:
OpenPIC Version 1.2 (1 CPUs and 26 IRQ sources) at fdfd0000
Calibrating delay loop...



Thanks.

Bo

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