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problems with longhaul cpufreq driver.

DISCUSSION [email protected] 4 participants 4 messages Dec 8, 2003

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#0 lore raw

Running Redhat9 with my own kernel compilation based on 2.4.23.

I added the cpufreq patch built in (not module). It patched cleanlt with no errors.

When I look at my speeds, they are all 0.

If I check the dmesg log, I see the following on startup:

longhaul: VIA C3 'Ezra' [C5C] CPU detected. Longhaul v2 supported.
longhaul: MinMult=5.0x MaxMult=6.0x
longhaul: FSB: 0MHz Lowestspeed=0MHz Highestspeed=0MHz
longhaul: FSB:0 Mult:10.0x

My Setup:

Via EPIA c800, and using cpufreq: cpufreq-LINUX_2_4-20031207.tar.gz

Here is a snippet of my config (options not used removed)

#
# Processor type and features
#
CONFIG_MCYRIXIII=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_X86_HAS_TSC=y
CONFIG_X86_ALIGNMENT_16=y
CONFIG_X86_USE_3DNOW=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_F00F_WORKS_OK=y
CONFIG_X86_MCE=y

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_PROC_INTF=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_24_API=y
CONFIG_X86_LONGHAUL=y
CONFIG_X86_CPUID=m
CONFIG_NOHIGHMEM=y
CONFIG_MTRR=y
CONFIG_X86_TSC=y

Anyone else got this problem?

#1 lore raw
Quoted 6 lines · On Mon, 2003-12-08 at 16:26, [email protected] wrote:

If I check the dmesg log, I see the following on startup:

longhaul: VIA C3 'Ezra' [C5C] CPU detected. Longhaul v2 supported.
longhaul: MinMult=5.0x MaxMult=6.0x
longhaul: FSB: 0MHz Lowestspeed=0MHz Highestspeed=0MHz
longhaul: FSB:0 Mult:10.0x

The problem here is the FSB is being reported as 0, this is wrong.

Quoted 1 line

Anyone else got this problem?

I had a very similar problem with my c3 using a 2.6 kernel, I posted a patch to this list a while ago that, whilst incorrect in some ways is probably enough to allow the module to work. There was a discussion about a better way to do it but I don't think that anything has been committed yet.

I would be interested to know if the patch works for you.

Ashley,

#2 lore raw
Quoted 11 lines · Ashley Pittman
Quoted 6 lines · On Mon, 2003-12-08 at 16:26, [email protected] wrote:

If I check the dmesg log, I see the following on startup:

longhaul: VIA C3 'Ezra' [C5C] CPU detected. Longhaul v2 supported.
longhaul: MinMult=5.0x MaxMult=6.0x
longhaul: FSB: 0MHz Lowestspeed=0MHz Highestspeed=0MHz
longhaul: FSB:0 Mult:10.0x

The problem here is the FSB is being reported as 0, this is wrong.

Quoted 8 lines
Quoted 1 line

Anyone else got this problem?

I had a very similar problem with my c3 using a 2.6 kernel, I posted a patch to this list a while ago that, whilst incorrect in some ways is probably enough to allow the module to work. There was a discussion about a better way to do it but I don't think that anything has been committed yet.

Ashley:

I don't know if you refer to:

http://linux-dj.bkbits.net:8080/cpufreq/[email protected]?nav=index.html|ChangeSet@-3w

If yes, then that bit is probably not in cvs 2.4, nor in any linux-2.6 mainstream (I guess).

Signature · 4 lines
Ducrot Bruno

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.
#3 lore raw
Quoted 12 lines · Ducrot Bruno
Quoted 10 lines · Ashley Pittman
Quoted 3 lines · On Mon, 2003-12-08 at 16:26, [email protected] wrote:

If I check the dmesg log, I see the following on startup:

longhaul: VIA C3 'Ezra' [C5C] CPU detected. Longhaul v2 supported. longhaul: MinMult=5.0x MaxMult=6.0x longhaul: FSB: 0MHz Lowestspeed=0MHz Highestspeed=0MHz longhaul: FSB:0 Mult:10.0x

The problem here is the FSB is being reported as 0, this is wrong.

Quoted 8 lines
Quoted 8 lines
Quoted 1 line

Anyone else got this problem?

I had a very similar problem with my c3 using a 2.6 kernel, I posted a patch to this list a while ago that, whilst incorrect in some ways is probably enough to allow the module to work. There was a discussion about a better way to do it but I don't think that anything has been committed yet.

My hack was even simpler!! I just hacked the function guess_fsb to always return 133!! (the kernel nor code is going nowhere other than this small eden box, so it matters not)...

My DMESG now shows:

longhaul: VIA C3 'Ezra' [C5C] CPU detected. Longhaul v2 supported.
longhaul: MinMult=5.0x MaxMult=6.0x
longhaul: FSB: 133MHz Lowestspeed=665MHz Highestspeed=798MHz

Thanks all for the pointers...