On Thu, 10 Oct 2019 at 13:40, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > > This series enables initial support for hierarchical CPU arrangement, managed > by PSCI and its corresponding cpuidle driver. It's based on using the generic > PM domain (genpd), which nowadays also supports devices belonging to CPUs. > > The last DTS patch enables the hierarchical topology to be used for the Qcom > 410c Dragonboard, which supports the PSCI OS-initiated mode. > > Do note, most of the code in this series have been posted earlier, but from the > latest version being reviewed, we agreed on that it was better to re-work the > PSCI backend driver as a first step, simply to get a clean interface towards the > cpuidle driver. > > Summary of the main-changes since the last submission [1]: > > - Moved implementation from the psci FW dricer into cpuidle-psci. > > - Re-requesting review of the DT bindings, as we have moved to yaml. No > changes as such, but tried to clarify a few things in the text. > > - Drop the patch enabling support for CPU hotplug, postponing that to the next > step. > > - Respect the hierarchical topology in DT only when OSI mode is supported. > This is to start simple and we can always extend the support on top. > > The series is also available at: > git.linaro.org/people/ulf.hansson/linux-pm.git next > > Kind regards > Ulf Hansson > > [1] > https://lwn.net/Articles/788306/ > > > Lina Iyer (1): > cpuidle: dt: Support hierarchical CPU idle states > > Ulf Hansson (12): > cpuidle: psci: Fix potential access to unmapped memory > dt: psci: Update DT bindings to support hierarchical PSCI states > firmware: psci: Export functions to manage the OSI mode > of: base: Add of_get_cpu_state_node() to get idle states for a CPU > node > cpuidle: psci: Simplify OF parsing of CPU idle state nodes > cpuidle: psci: Support hierarchical CPU idle states > cpuidle: psci: Prepare to use OS initiated suspend mode via PM domains > cpuidle: psci: Add support for PM domains by using genpd > cpuidle: psci: Add a helper to attach a CPU to its PM domain > cpuidle: psci: Attach CPU devices to their PM domains > cpuidle: psci: Manage runtime PM in the idle path > arm64: dts: Convert to the hierarchical CPU topology layout for > MSM8916 > > .../devicetree/bindings/arm/psci.yaml | 153 +++++++++ > arch/arm64/boot/dts/qcom/msm8916.dtsi | 57 +++- > drivers/cpuidle/Makefile | 4 +- > drivers/cpuidle/cpuidle-psci-domain.c | 302 ++++++++++++++++++ > drivers/cpuidle/cpuidle-psci.c | 106 ++++-- > drivers/cpuidle/cpuidle-psci.h | 17 + > drivers/cpuidle/dt_idle_states.c | 5 +- > drivers/firmware/psci/psci.c | 18 +- > drivers/of/base.c | 36 +++ > include/linux/of.h | 8 + > include/linux/psci.h | 2 + > 11 files changed, 673 insertions(+), 35 deletions(-) > create mode 100644 drivers/cpuidle/cpuidle-psci-domain.c > create mode 100644 drivers/cpuidle/cpuidle-psci.h > > -- > 2.17.1 > Sudeep, Lorenzo, Just wanted to give you a gentle ping about this series, especially patch1 is kind of urgent. Kind regards Uffe
