ARM: OMAP4: CPUidle: Use coupled cpuidle states to implement SMP cpuidle.

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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: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

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This commit is contained in:

Santosh Shilimkar 2011-12-25 21:00:40 +05:30 • committed by Kevin Hilman

parent 11d6ec2e48

commit dd3ad97c56

2 changed files with 67 additions and 46 deletions

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arch/arm/mach-omap2/Kconfig

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108

arch/arm/mach-omap2/cpuidle44xx.c

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