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CPU frequency settings ?

Discussion in 'Tomato Firmware' started by jenom, Jul 3, 2013.

  1. jenom

    jenom Networkin' Nut Member

    I have tried out various modded tomato versions, Toastman 1.28 versions, K24
    Tried only the smallest versions, without USB support (ND), tiny and mini versions.
    In one of the version, there was a "Change CPU Frequency" somewhere in the main GUI window…..so I went ahead and increased from 188 to 216 (BCM3302/BCM4712)
    I want to go back to default, but do not recall which version had this modification.
    tried manually:
    nvram set clkfreq=200
    nvram commit
    nvram reboot
    All went OK, however main GUI windows, Status —-Overview still shows 216 Mhz !!
    Can anyone point me to the right Toastman version with CPU FREQUENCY setting GUI menu ?

    cat /proc/cpuinfo show also 216
    nvram show | grep clkfreq .....216

    Why it does not change ?
    Not changeble ?

    Thanks!
     
  2. koitsu

    koitsu Network Guru Member

    Some models of Broadcom CPUs do not let you change the CPU clock frequency. This is completely separate from the NVRAM setting / the GUI setting. Not much can be done about this, I'm sorry to say.
     
  3. jenom

    jenom Networkin' Nut Member

    needed to do :
    nvram set debug_clkfix=0
    nvram set clkfreq=200

    now it is changed to 200 :)

    thanks for your reply
     
    koitsu likes this.
  4. mstombs

    mstombs Network Guru Member

    But that cpu clkfreq patch was a Linksys fix to a problem with large wireless transfers, see the relevant lines of code here

    http://repo.or.cz/w/tomato.git/blob...7af70b12ad:/release/src/router/rc/init.c#l613

    I had this problem with my first wrt54gs v1.1 (only recently retired), and it was the reason I joined this site and switched to HyperWRT many years ago...

    Similar hardware V2.0 seems to have been shipped with 216Mhz as default...

    http://en.wikipedia.org/wiki/Linksys_WRT54G_series#WRT54GS
     
  5. jenom

    jenom Networkin' Nut Member

    interesting, with version 3, linksys used a slower (200 Mhz) BCM5352
    I guess, it would probably work fine at 216 Mhz,
     

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