[coreboot-gerrit] Patch merged into coreboot/master: libpayload: honor TSC information under CONFIG_LP_TIMER_RDTSC

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit 152e5a03a130cea3009685cbf7eb0ea354d9fd1c
Author: Aaron Durbin <adurbin at chromium.org>
Date:   Wed Feb 10 11:01:49 2016 -0600

    libpayload: honor TSC information under CONFIG_LP_TIMER_RDTSC
    
    When CONFIG_LP_TIMER_RDTSC is enabled honor the TSC information
    exported in the coreboot tables as the cpu_khz frequency. That
    allows get_cpu_speed() not to be called which currently relies
    on the 8254 PIT. As certain x86 platforms allow that device
    to be optional or turned off for power saving reasons, allow
    a path where get_cpu_speed() is no longer called. Additionally,
    this approach also allows the libpayload to not duplicate logic
    that already exists in coreboot.
    
    BUG=chrome-os-partner:50214
    BRANCH=glados
    TEST=Confirmed in payload TSC frequency is honored instead of
         using get_cpu_speed().
    
    Change-Id: Ib8993afdfb49065d43de705d6dbbdb9174b6f2c4
    Signed-off-by: Aaron Durbin <adurbin at chromium.org>
    Reviewed-on: https://review.coreboot.org/13671
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth <martinroth at google.com>
    Reviewed-by: Andrey Petrov <andrey.petrov at intel.com>


See https://review.coreboot.org/13671 for details.

-gerrit