• Mark Brown's avatar
    clk: wm831x: Add initial WM831x clock driver · f05259a6
    Mark Brown authored
    The WM831x and WM832x series of PMICs contain a flexible clocking
    subsystem intended to provide always on and system core clocks.  It
    features:
    
    - A 32.768kHz crystal oscillator which can optionally be used to pass
      through an externally generated clock.
    - A FLL which can be clocked from either the 32.768kHz oscillator or
      the CLKIN pin.
    - A CLKOUT pin which can bring out either the oscillator or the FLL
      output.
    - The 32.768kHz clock can also optionally be brought out on the GPIO
      pins of the device.
    
    This driver fully supports the 32.768kHz oscillator and CLKOUT.  The FLL
    is supported only in AUTO mode, the full flexibility of the FLL cannot
    currently be used.
    
    Due to a lack of access to systems where the core SoC has been converted
    to use the generic clock API this driver has been compile tested only.
    Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
    Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
    f05259a6
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