tree 530fb34442234b04afe0972d6765bbc7f17ba0f6
parent b1ec4c8e483d0d00d3114eafdb2c85c1cf3ed4ae
author Sergei Shtylyov <sshtylyov@ru.mvista.com> 1206623371 +0300
committer Ralf Baechle <ralf@linux-mips.org> 1207061194 +0100

[MIPS] Alchemy: work around clock misdetection on early Au1000

Work around the CPU clock miscalculation on Au1000DA/HA/HB due the
sys_cpupll register being write-only, i.e. actually do what the comment
before cal_r4off() function advertised for years but the code failed at.
This is achieved by just giving user a chance to define the clock
explicitly  in the board config. via CONFIG_SOC_AU1000_FREQUENCY option,
defaulting to 396 MHz if the option is not given...

The patch is based on the AMD's big unpublished patch, the issue seems to
be an undocumented errata (or feature :-)...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>