• Paul Burton's avatar
    cpuidle: cpuidle-cps: add MIPS CPS cpuidle driver · d0508944
    Paul Burton authored
    This patch adds a cpuidle driver for systems based around the MIPS
    Coherent Processing System (CPS) architecture. It supports four idle
    states:
    
      - The standard MIPS wait instruction.
    
      - The non-coherent wait, clock gated & power gated states exposed by
        the recently added pm-cps layer.
    
    The pm-cps layer is used to enter all the deep idle states. Since cores
    in the clock or power gated states cannot service interrupts, the
    gic_send_ipi_single function is modified to send a power up command for
    the appropriate core to the CPC in cases where the target CPU has marked
    itself potentially incoherent.
    Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
    d0508944
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