linux.git/include/linux/pm_domain.h, branch v7.1-rc2

pmdomain: Merge branch pmdomain into next

2026-04-01T11:33:35+00:00

Merge the immutable branch pmdomain into next to get the changes queued and
tested for the next release. The pmdomain branch hosts minor core changes
for pmdomain.

Signed-off-by: Ulf Hansson

PM: domains: De-constify fields in struct dev_pm_domain_attach_data

2026-04-01T11:15:48+00:00

It doesn't really make sense to keep u32 fields to be marked as const.
Having the const fields prevents their modification in the driver. Instead
the whole struct can be defined as const, if it is constant.

Fixes: 161e16a5e50a ("PM: domains: Add helper functions to attach/detach multiple PM domains")
Signed-off-by: Dmitry Baryshkov 
Signed-off-by: Ulf Hansson

pmdomain: core: Extend statistics for domain idle states with s2idle data

2026-04-01T11:07:31+00:00

To allow user space to monitor the selection of the domain idle state
during s2idle for a CPU PM domain, let's extend the debugfs support in
genpd with this information.

Suggested-by: Dhruva Gole 
Reviewed-by: Dhruva Gole 
Reviewed-by: Kevin Hilman 
Signed-off-by: Ulf Hansson

pmdomain: Respect the CPU system wakeup QoS limit for s2idle

2025-11-25T18:01:29+00:00

A CPU system wakeup QoS limit may have been requested by user space. To
avoid breaking this constraint when entering a low power state during
s2idle through genpd, let's extend the corresponding genpd governor for
CPUs. More precisely, during s2idle let the genpd governor select a
suitable domain idle state, by taking into account the QoS limit.

Reviewed-by: Dhruva Gole 
Reviewed-by: Kevin Hilman (TI) 
Tested-by: Kevin Hilman (TI) 
Signed-off-by: Ulf Hansson 
Link: https://patch.msgid.link/20251125112650.329269-3-ulf.hansson@linaro.org
Signed-off-by: Rafael J. Wysocki

pmdomain: core: Restore behaviour for disabling unused PM domains

2025-09-11T10:36:14+00:00

Recent changes to genpd prevents those PM domains being powered-on during
initialization from being powered-off during the boot sequence. Based upon
whether CONFIG_PM_CONFIG_PM_GENERIC_DOMAINS_OF is set of not, genpd relies
on the sync_state mechanism or the genpd_power_off_unused() (which is a
late_initcall_sync), to understand when it's okay to allow these PM domains
to be powered-off.

This new behaviour in genpd has lead to problems on different platforms.
Let's therefore restore the behavior of genpd_power_off_unused().
Moreover, let's introduce GENPD_FLAG_NO_STAY_ON, to allow genpd OF
providers to opt-out from the new behaviour.

Link: https://lore.kernel.org/all/20250701114733.636510-1-ulf.hansson@linaro.org/
Reported-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/all/20250902-rk3576-lockup-regression-v1-1-c4a0c9daeb00@collabora.com/
Reported-by: Nicolas Frattaroli 
Fixes: 0e789b491ba0 ("pmdomain: core: Leave powered-on genpds on until sync_state")
Fixes: 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until late_initcall_sync")
Tested-by: Heiko Stuebner 
Reviewed-by: Geert Uytterhoeven 
Tested-by: Geert Uytterhoeven 
Signed-off-by: Ulf Hansson

Merge tag 'pmdomain-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm

2025-07-29T18:42:31+00:00

Pull pmdomain updates from Ulf Hansson:
 "pmdomain core:
   - Leave powered-on genpds on until ->sync_state() or late_initcall_sync
   - Export a common ->sync_state() helper for genpd providers
   - Add generic ->sync_state() support
   - Add a bus/driver for genpd provider-devices
   - Introduce dev_pm_genpd_is_on() for consumers

  pmdomain providers:
   - cpuidle-psci: Drop redundant ->sync_state() support
   - cpuidle-riscv-sbi: Drop redundant ->sync_state() support
   - imx: Set ISI panic write for imx8m-blk-ctrl
   - qcom: Add support for Glymur and Milos RPMh power-domains
   - qcom: Use of_genpd_sync_state() for power-domains
   - rockchip: Add support for the RK3528 variant
   - samsung: Fix splash-screen handover by enforcing a ->sync_state()
   - sunxi: Add support for Allwinner A523's PCK600 power-controller
   - tegra: Opt-out from genpd's common ->sync_state() support for pmc
   - thead: Instantiate a GPU power sequencer via the auxiliary bus
   - renesas: Move init to postcore_initcalls
   - xilinx: Move ->sync_state() support to firmware driver
   - xilinx: Use of_genpd_sync_state() for power-domains

  pmdomain consumers:
   - remoteproc: imx_rproc: Fixup the detect/attach procedure for
     pre-booted cores"

* tag 'pmdomain-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: (44 commits)
  pmdomain: qcom: rpmhpd: Add Glymur RPMh Power Domains
  dt-bindings: power: rpmpd: Add Glymur power domains
  remoteproc: imx_rproc: detect and attach to pre-booted remote cores
  remoteproc: imx_rproc: skip clock enable when M-core is managed by the SCU
  pmdomain: core: introduce dev_pm_genpd_is_on()
  pmdomain: ti: Select PM_GENERIC_DOMAINS
  pmdomain: sunxi: sun20i-ppu: change to tristate and enable for ARCH_SUNXI
  pmdomain: sunxi: add driver for Allwinner A523's PCK-600 power controller
  pmdomain: sunxi: sun20i-ppu: add A523 support
  pmdomain: samsung: Fix splash-screen handover by enforcing a sync_state
  cpuidle: riscv-sbi: Drop redundant sync_state support
  cpuidle: psci: Drop redundant sync_state support
  pmdomain: core: Leave powered-on genpds on until sync_state
  pmdomain: core: Leave powered-on genpds on until late_initcall_sync
  pmdomain: core: Default to use of_genpd_sync_state() for genpd providers
  driver core: Add dev_set_drv_sync_state()
  pmdomain: core: Add common ->sync_state() support for genpd providers
  driver core: Export get_dev_from_fwnode()
  firmware: xilinx: Use of_genpd_sync_state()
  firmware: xilinx: Don't share zynqmp_pm_init_finalize()
  ...

pmdomain: core: introduce dev_pm_genpd_is_on()

2025-07-16T18:54:27+00:00

This helper function returns the current power status of a given generic
power domain.

As example, remoteproc/imx_rproc.c can now use this function to check
the power status of the remote core to properly set "attached" or
"offline" modes.

Suggested-by: Ulf Hansson 
Reviewed-by: Bjorn Andersson 
Reviewed-by: Peng Fan 
Signed-off-by: Hiago De Franco 
Link: https://lore.kernel.org/r/20250629172512.14857-2-hiagofranco@gmail.com
Signed-off-by: Ulf Hansson

pmdomain: core: Leave powered-on genpds on until late_initcall_sync

2025-07-09T11:29:53+00:00

Powering-off a genpd that was on during boot, before all of its consumer
devices have been probed, is certainly prone to problems.

As a step to improve this situation, let's prevent these genpds from being
powered-off until genpd_power_off_unused() gets called, which is a
late_initcall_sync().

Note that, this still doesn't guarantee that all the consumer devices has
been probed before we allow to power-off the genpds. Yet, this should be a
step in the right direction.

Suggested-by: Saravana Kannan 
Tested-by: Hiago De Franco  # Colibri iMX8X
Tested-by: Tomi Valkeinen  # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson 
Link: https://lore.kernel.org/r/20250701114733.636510-22-ulf.hansson@linaro.org

pmdomain: core: Add common ->sync_state() support for genpd providers

2025-07-09T11:29:41+00:00

If the genpd provider's fwnode doesn't have an associated struct device
with it, we can make use of the generic genpd->dev and it corresponding
driver internally in genpd to manage ->sync_state().

More precisely, while adding a genpd OF provider let's check if the fwnode
has a device and if not, make the preparation to handle ->sync_state()
internally through the genpd_provider_driver and the genpd_provider_bus.

Note that, genpd providers may opt out from this behaviour by setting the
GENPD_FLAG_NO_SYNC_STATE config options for the genpds in question.

Suggested-by: Saravana Kannan 
Tested-by: Hiago De Franco  # Colibri iMX8X
Tested-by: Tomi Valkeinen  # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson 
Link: https://lore.kernel.org/r/20250701114733.636510-19-ulf.hansson@linaro.org

pmdomain: core: Prepare to add the common ->sync_state() support

2025-07-09T11:29:02+00:00

Before we can implement the common ->sync_state() support in genpd, we need
to allow a few specific genpd providers to opt out from the new behaviour.

Let's introduce GENPD_FLAG_NO_SYNC_STATE as a new genpd config option, to
allow providers to opt out.

Suggested-by: Saravana Kannan 
Tested-by: Hiago De Franco  # Colibri iMX8X
Tested-by: Tomi Valkeinen  # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson 
Link: https://lore.kernel.org/r/20250701114733.636510-9-ulf.hansson@linaro.org