[RFC PATCH 0/2] powernv: Show the correct clock value in /proc/cpuinfo

[Gautham R. Shenoy]

From: "Gautham R. Shenoy" <ego at linux.vnet.ibm.com>

Hi,

Currently, the code in setup-common.c for powerpc assumes that all
clock rates are same in a smp system. This value is cached in the
variable named ppc_proc_freq and is the value that is reported in
/proc/cpuinfo.

However on the PowerNV platform, the clock rate is same only across
the threads of the same core. Hence the value that is reported in
/proc/cpuinfo is incorrect on PowerNV platforms.

This patch-series fixes this problem by having /proc/cpuinfo report
the value returned by cpufreq_quick_get(cpu) whenever the cpufreq
backend driver is available and fallback to the old way of reporting
the clock rate in its absence.

These patches depend on the patches to enable dynamic cpufrequency
scaling on PowerNV that can be found here:
http://linuxppc.10917.n7.nabble.com/PATCH-v2-0-6-powernv-cpufreq-Dynamic-cpu-frequency-scaling-td80641.html

Gautham R. Shenoy (2):
  powerpc: powernv: Framework to show the correct clock in /proc/cpuinfo
  powerpc: powernv: Implement ppc_md.get_proc_freq()

 arch/powerpc/include/asm/machdep.h     |  2 ++
 arch/powerpc/kernel/setup-common.c     | 16 ++++++++++++----
 arch/powerpc/platforms/powernv/setup.c | 21 +++++++++++++++++++++
 3 files changed, 35 insertions(+), 4 deletions(-)

-- 
1.8.3.1