Rafael, On Mon, 30 Dec 2019 at 15:44, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > > Changes in v5: > - Remove PM domains in the error path, when failing to enable OSI. > - Folded in a patch that adds a genpd OF helper to remove subdomains. > - Added reviewed-by tags. > > Changes in v4: > - Move the check for OSI support from psci_dt_attach_cpu() to the > caller's side of it. > - Add comment in the code about using the deepest idle state as the > triggering point for the domain state selection. > - Folded in a patch to enable support for CPU hotplug. > > Changes in v3: > - Take one step further to completely avoid executing any OSI specific > code from the ->enter() callback, while operating in the default PSCI > Platform Coordinated mode. > - Update example for the PSCI DT bindings to make it compile with > "make dt_binding_check" > > Changes in v2: > - Avoid to affect the non-OSI path with specific changes for OSI. This > forced me to re-order the series and a caused more or less minor changes > to most of the patches. > - Updated the DT bindings for PSCI to clarify and to include the "psci" > name of the PM domain to attach to. > - Replaced patch1 with another patch from Sudeep, solving the same > problem, but in a different way. > > 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. > > More detailed background can be found from previous submissions [1]. > > 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 > > Sudeep Holla (1): > cpuidle: psci: Align psci_power_state count with idle state count > > Ulf Hansson (13): > 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: Add a helper to attach a CPU to its PM domain > cpuidle: psci: Attach CPU devices to their PM domains > cpuidle: psci: Prepare to use OS initiated suspend mode via PM domains > cpuidle: psci: Manage runtime PM in the idle path > cpuidle: psci: Support CPU hotplug for the hierarchical model > PM / Domains: Introduce a genpd OF helper that removes a subdomain > cpuidle: psci: Add support for PM domains by using genpd > arm64: dts: Convert to the hierarchical CPU topology layout for > MSM8916 > > .../devicetree/bindings/arm/cpus.yaml | 15 + > .../devicetree/bindings/arm/psci.yaml | 104 ++++++ > arch/arm64/boot/dts/qcom/msm8916.dtsi | 57 +++- > drivers/base/power/domain.c | 38 +++ > drivers/cpuidle/Makefile | 4 +- > drivers/cpuidle/cpuidle-psci-domain.c | 308 ++++++++++++++++++ > drivers/cpuidle/cpuidle-psci.c | 161 +++++++-- > 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/cpuhotplug.h | 1 + > include/linux/of.h | 8 + > include/linux/pm_domain.h | 8 + > include/linux/psci.h | 2 + > 15 files changed, 747 insertions(+), 35 deletions(-) > create mode 100644 drivers/cpuidle/cpuidle-psci-domain.c > create mode 100644 drivers/cpuidle/cpuidle-psci.h > > -- > 2.17.1 > This series is ready to go (unless you have some objections of course), would you mind queuing it up? Of course, patch15 can be left for arm-soc. If you prefer a pull-request, just tell me. Kind regards Uffe
