This adds a "powered-down" state for cpuidle. It's a power gating idle mode. It supports the secondary CPUs (i.e., CPU1-CPU3) to go into powered-down state independently. When any of the secondary CPUs go into this state, it can be power gated alone. There is a limitation on CPU0. The CPU0 can go into powered-down state only when all secondary CPU is offline. After CPU0 is in powered-down state, the CPU rail can be turned off. All CPUs entering powered-down state is not working. The CPU0 enters this state only when secondary CPU is offline. This can be coverd by CPUquiet and cluster switching mechanism. We also remove the ambiguous name of LP2 in the cpuidle state. Verified on Seaboard(Tegra20) and Cardhu(Tegra30). This patch set should depend on these patches: ARM: tegra: rename the file of "sleep-tXX" to "sleep-tegraXX" ARM: tegra30: clocks: add AHB and APB clocks ARM: tegra: dt: add L2 cache controller ARM: tegra: common: using OF api for L2 cache init Major changes: V4: * rebased on next-20121031 V3: * fix a potential issue that will cause CPU be corrupted * rename the LP2 state to powered-down state V2: * refine L1 cache maintenance function Previous work can be found at: V2: http://www.mail-archive.com/linux-tegra@xxxxxxxxxxxxxxx/msg06478.html V1: http://www.mail-archive.com/linux-tegra@xxxxxxxxxxxxxxx/msg06319.html Joseph Lo (7): ARM: tegra: cpuidle: separate cpuidle driver for different chips ARM: tegra: cpuidle: add CPU resume function ARM: tegra30: cpuidle: add powered-down state for secondary CPUs ARM: tegra30: common: enable csite clock ARM: tegra30: clocks: add CPU low-power function into tegra_cpu_car_ops ARM: tegra30: flowctrl: add cpu_suspend_exter/exit function ARM: tegra30: cpuidle: add powered-down state for CPU0 arch/arm/mach-tegra/Makefile | 7 + arch/arm/mach-tegra/common.c | 1 + .../mach-tegra/{cpuidle.c => cpuidle-tegra20.c} | 7 +- arch/arm/mach-tegra/cpuidle-tegra30.c | 188 +++++++++++++++++ arch/arm/mach-tegra/cpuidle.c | 47 ++--- arch/arm/mach-tegra/cpuidle.h | 32 +++ arch/arm/mach-tegra/flowctrl.c | 47 +++++ arch/arm/mach-tegra/flowctrl.h | 8 + arch/arm/mach-tegra/headsmp.S | 60 ++++++ arch/arm/mach-tegra/pm.c | 218 ++++++++++++++++++++ arch/arm/mach-tegra/pm.h | 33 +++ arch/arm/mach-tegra/reset.c | 6 + arch/arm/mach-tegra/reset.h | 9 + arch/arm/mach-tegra/sleep-tegra30.S | 66 ++++++ arch/arm/mach-tegra/sleep.S | 71 +++++++ arch/arm/mach-tegra/sleep.h | 5 + arch/arm/mach-tegra/tegra30_clocks.c | 108 ++++++++++ arch/arm/mach-tegra/tegra_cpu_car.h | 37 ++++ 18 files changed, 911 insertions(+), 39 deletions(-) copy arch/arm/mach-tegra/{cpuidle.c => cpuidle-tegra20.c} (91%) create mode 100644 arch/arm/mach-tegra/cpuidle-tegra30.c create mode 100644 arch/arm/mach-tegra/cpuidle.h create mode 100644 arch/arm/mach-tegra/pm.c create mode 100644 arch/arm/mach-tegra/pm.h -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
