• Mark Brown's avatar
    [ARM] S3C64XX: Initial support for DVFS · b3748ddd
    Mark Brown authored
    This patch provides initial support for CPU frequency scaling on the
    Samsung S3C ARM processors. Currently only S3C6410 processors are
    supported, though addition of another data table with supported clock
    rates should be sufficient to enable support for further CPUs.
    Use the regulator framework to provide optional support for DVFS in
    the S3C cpufreq driver. When a software controllable regulator is
    configured the driver will use it to lower the supply voltage when
    running at a lower frequency, giving improved power savings.
    When regulator support is disabled or no regulator can be obtained
    for VDDARM the driver will fall back to scaling only the frequency.
    Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
    Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
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