• Kevin Hilman's avatar
    ARM: OMAP2+: PM: MPU DVFS: use generic CPU device for MPU-SS · 24d7b40a
    Kevin Hilman authored
    Currently, a dummy omap_device is created for the MPU sub-system so
    that a device node exists for MPU DVFS.  Specifically, for the
    association of MPU OPPs to a device node, and so that a voltage
    regulator can be mapped to a device node.
    
    For drivers to get a handle to this device node, an OMAP-specific API
    has been used.  However, the kernel already has device nodes for the
    CPU(s) in the system, so we can use those instead of an OMAP-specific
    dummy device and then drivers (like OMAP CPUfreq) can use generic
    APIs.
    
    To use the existing CPU device nodes, modify the OPP creation and
    regulator registration to use the CPU0 device node for registraion.
    
    NOTE: this patch always uses CPU0 as the device node.  On all
          OMAPs today, MPU DVFS scales all CPUs together, so this will
          not be a problem, but this assumption will need to be changed
          if independently scalable CPUs are introduced.
    
    Cc: Paul Walmsley <paul@pwsan.com>
    Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
    24d7b40a
opp.c 2.71 KB