• Santosh Shilimkar's avatar
    ARM: OMAP4: CPUidle: Use coupled cpuidle states to implement SMP cpuidle. · dd3ad97c
    Santosh Shilimkar authored
    OMAP4 CPUDILE driver is converted mainly based on notes from the
    coupled cpuidle patch series.
    
    The changes include :
    - Register both CPUs and C-states to cpuidle driver.
    - Set struct cpuidle_device.coupled_cpus
    - Set struct cpuidle_device.safe_state to non coupled state.
    - Set CPUIDLE_FLAG_COUPLED in struct cpuidle_state.flags for each
      state that affects multiple cpus.
    - Separate ->enter hooks for coupled & simple idle.
    - CPU0 wait loop for CPU1 power transition.
    - CPU1 wakeup mechanism for the idle exit.
    - Enabling ARCH_NEEDS_CPU_IDLE_COUPLED for OMAP4.
    
    Thanks to Kevin Hilman and Colin Cross on the suggestions/fixes
    on the intermediate version of this patch.
    Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
    Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
    dd3ad97c
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