• Sergei Shtylyov's avatar
    [MIPS] Alchemy: work around clock misdetection on early Au1000 · 758e285f
    Sergei Shtylyov authored
    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    The patch is based on the AMD's big unpublished patch, the issue seems to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: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
    Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    758e285f
au1000.h 57.7 KB