linux-toradex.git/drivers/base/power, branch v5.5-rc7

Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2019-12-05T19:43:31+00:00

Pull ARM SoC driver updates from Olof Johansson:
 "Various driver updates for platforms:

   - A larger set of work on Tegra 2/3 around memory controller and
     regulator features, some fuse cleanups, etc..

   - MMP platform drivers, in particular for USB PHY, and other smaller
     additions.

   - Samsung Exynos 5422 driver for DMC (dynamic memory configuration),
     and ASV (adaptive voltage), allowing the platform to run at more
     optimal operating points.

   - Misc refactorings and support for RZ/G2N and R8A774B1 from Renesas

   - Clock/reset control driver for TI/OMAP

   - Meson-A1 reset controller support

   - Qualcomm sdm845 and sda845 SoC IDs for socinfo"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (150 commits)
  firmware: arm_scmi: Fix doorbell ring logic for !CONFIG_64BIT
  soc: fsl: add RCPM driver
  dt-bindings: fsl: rcpm: Add 'little-endian' and update Chassis definition
  memory: tegra: Consolidate registers definition into common header
  memory: tegra: Ensure timing control debug features are disabled
  memory: tegra: Introduce Tegra30 EMC driver
  memory: tegra: Do not handle error from wait_for_completion_timeout()
  memory: tegra: Increase handshake timeout on Tegra20
  memory: tegra: Print a brief info message about EMC timings
  memory: tegra: Pre-configure debug register on Tegra20
  memory: tegra: Include io.h instead of iopoll.h
  memory: tegra: Adapt for Tegra20 clock driver changes
  memory: tegra: Don't set EMC rate to maximum on probe for Tegra20
  memory: tegra: Add gr2d and gr3d to DRM IOMMU group
  memory: tegra: Set DMA mask based on supported address bits
  soc: at91: Add Atmel SFR SN (Serial Number) support
  memory: atmel-ebi: switch to SPDX license identifiers
  memory: atmel-ebi: move NUM_CS definition inside EBI driver
  soc: mediatek: Refactor bus protection control
  soc: mediatek: Refactor sram control
  ...

PM / QoS: Restore DEV_PM_QOS_MIN/MAX_FREQUENCY

2019-11-29T11:04:50+00:00

Support for adding per-device frequency limits was removed in
commit 2aac8bdf7a0f ("PM: QoS: Drop frequency QoS types from device PM QoS")
after cpufreq switched to use a new "freq_constraints" construct.

Restore support for per-device freq limits but base this upon
freq_constraints. This is primarily meant to be used by the devfreq
subsystem.

This removes the "static" marking on freq_qos_apply but does not export
it for modules.

Signed-off-by: Leonard Crestez 
Reviewed-by: Matthias Kaehlcke 
Tested-by: Matthias Kaehlcke 
Signed-off-by: Rafael J. Wysocki

PM / QoS: Initial kunit test

2019-11-29T11:04:49+00:00

The pm_qos family of APIs are used in relatively difficult to reproduce
scenarios such as thermal throttling so they benefit from unit testing.

Start by adding basic tests from the the freq_qos APIs. It includes
tests for issues that were brought up on mailing lists:

https://patchwork.kernel.org/patch/11252425/#23017005
https://patchwork.kernel.org/patch/11253421/

Signed-off-by: Leonard Crestez 
Reviewed-by: Matthias Kaehlcke 
Signed-off-by: Rafael J. Wysocki

Merge branches 'pm-sleep', 'pm-domains', 'pm-opp' and 'powercap'

2019-11-26T09:27:49+00:00

* pm-sleep:
  PM / wakeirq: remove unnecessary parentheses
  PM / core: Clean up some function headers in power.h
  PM / hibernate: memory_bm_find_bit(): Tighten node optimisation

* pm-domains:
  PM / Domains: Convert to dev_to_genpd_safe() in genpd_syscore_switch()
  mmc: tmio: Avoid boilerplate code in ->runtime_suspend()
  PM / Domains: Implement the ->start() callback for genpd
  PM / Domains: Introduce dev_pm_domain_start()

* pm-opp:
  PM / OPP: Support adjusting OPP voltages at runtime

* powercap:
  powercap/intel_rapl: add support for Cometlake desktop
  powercap/intel_rapl: add support for CometLake Mobile

PM / Domains: Convert to dev_to_genpd_safe() in genpd_syscore_switch()

2019-11-13T10:44:15+00:00

The intent with walking the gpd_list via calling genpd_present() from
genpd_syscore_switch(), is to make sure the dev->pm_domain pointer belongs
to a registered genpd. However, as a genpd can't be removed if there is a
device attached to it, let's convert to use the quicker dev_to_genpd_safe()
instead.

Due to the above change, this allows us to clean up genpd_present() and
move it inside CONFIG_PM_GENERIC_DOMAINS_OF, so let's do that as well.

Signed-off-by: Ulf Hansson 
Signed-off-by: Rafael J. Wysocki

PM / Domains: Implement the ->start() callback for genpd

2019-11-13T10:41:50+00:00

To allow a subsystem/driver to explicitly start its device from genpd's
point view, let's implement the ->start() callback in the struct
dev_pm_domain that corresponds to the genpd.

Signed-off-by: Ulf Hansson 
Signed-off-by: Rafael J. Wysocki

PM / Domains: Introduce dev_pm_domain_start()

2019-11-13T10:41:50+00:00

For a subsystem/driver that either doesn't support runtime PM or makes use
of pm_runtime_set_active() during ->probe(), may try to access its device
when probing, even if it may not be fully powered on from the PM domain's
point of view. This may be the case when the used PM domain is a genpd
provider, that implements genpd's ->start|stop() device callbacks.

There are cases where the subsystem/driver managed to avoid the above
problem, simply by calling pm_runtime_enable() and pm_runtime_get_sync()
during ->probe(). However, this approach comes with a drawback, especially
if the subsystem/driver implements a ->runtime_resume() callback.

More precisely, the subsystem/driver then needs to use a device flag, which
is checked in its ->runtime_resume() callback, as to avoid powering on its
resources the first time the callback is invoked. This is needed because
the subsystem/driver has already powered on the resources for the device,
during ->probe() and before it called pm_runtime_get_sync().

In a way to avoid this boilerplate code and the inefficient check for "if
(first_time_suspend)" in the ->runtime_resume() callback for these
subsystems/drivers, let's introduce and export a dev_pm_domain_start()
function, that may be called during ->probe() instead.

Moreover, let the dev_pm_domain_start() invoke an optional ->start()
callback, added to the struct dev_pm_domain, as to allow a PM domain
specific implementation.

Signed-off-by: Ulf Hansson 
Signed-off-by: Rafael J. Wysocki

PM / wakeirq: remove unnecessary parentheses

2019-11-13T10:31:08+00:00

Remove unnecessary parentheses found by code review.

Signed-off-by: Xiaofei Tan 
Signed-off-by: Rafael J. Wysocki

PM / core: Clean up some function headers in power.h

2019-11-08T11:38:42+00:00

The power.h is a bit messy due to the various existing CONFIG_PM* Kconfig
combinations. However the final section for wakeup_source_sysfs*() can be
moved inside one of the existing sections rather than adding yet another
one, so let's do that to clean up the code a little bit.

Signed-off-by: Ulf Hansson 
Signed-off-by: Rafael J. Wysocki

PM: wakeup: Add routine to help fetch wakeup source object.

2019-10-29T19:45:54+00:00

Some user might want to go through all registered wakeup sources
and doing things accordingly. For example, SoC PM driver might need to
do HW programming to prevent powering down specific IP which wakeup
source depending on. So add this API to help walk through all registered
wakeup source objects on that list and return them one by one.

Signed-off-by: Ran Wang 
Tested-by: Leonard Crestez 
Reviewed-by: Rafael J. Wysocki 
Signed-off-by: Li Yang