This patchset add support to power down the L2 and the PM domain for the CPU subsystem on Qualcomm's APQ8084. Only 8084 is supported at this time, because the firmware for chipsets prior to 8084 (8074, 8064) will allow the domain to be powered off only when running as a single core system. That is, all secondary cores must be hotplugged off. With 8084, a new feature in the firmware allows any core to be the last core to enter power down state. The state of the L2 power controller will be carried as an argument by the last CPU, when entering SCM. This patchset extensively uses the changes to GenPD and the CPU PM domain introduced by [1]. Also under discussion on the mailing list, is the hwspinlock changes that are part of this series. I have tested this on 8084. But invalidating cache causes a system hang and is under investigation. This patchset at this time is only provided as a proof of concept for using CPU PM domains. Thanks, Lina [1]. http://www.spinics.net/lists/arm-kernel/msg437091.html Lina Iyer (10): drivers: qcom: spm: Support cache SPMs drivers: qcom: spm: Add 8084 L2 SPM register data drivers: qcom: spm: Enable runtime suspend/resume of CPU PM domain arm: dts: Add L2 power-controller device bindings for APQ8084 arm: dts: Add power domain device bindings for APQ8084 drivers: qcom: Enable genpd on selecting QCOM_PM hwspinlock: Introduce raw capability for hwspinlocks hwspinlock: qcom: Lock #7 is special lock, uses dynamic proc_id drivers: qcom: spm: Use hwspinlock to serialize entry into SCM arm: dts: qcom: Add TCSR mutex device bindings for APQ8084 .../devicetree/bindings/arm/msm/qcom,saw2.txt | 1 + Documentation/hwspinlock.txt | 16 +++ arch/arm/boot/dts/qcom-apq8084.dtsi | 21 +++- drivers/hwspinlock/hwspinlock_core.c | 75 +++++++----- drivers/hwspinlock/hwspinlock_internal.h | 6 + drivers/hwspinlock/qcom_hwspinlock.c | 22 +++- drivers/soc/qcom/Kconfig | 5 + drivers/soc/qcom/spm.c | 130 ++++++++++++++++++--- include/linux/hwspinlock.h | 41 +++++++ 9 files changed, 264 insertions(+), 53 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
