linux.git/drivers/opp, branch v5.18

OPP: Add support of "opp-microwatt" for EM registration

2022-03-03T04:05:04+00:00

The Energy Model (EM) can be created based on DT entry:
'dynamic-power-coefficient'. It's a 'simple' EM which is limited to the
dynamic power. It has to fit into the math formula which requires also
information about voltage. Some of the platforms don't expose voltage
information, thus it's not possible to use EM registration using DT.

This patch aims to fix it. It introduces new implementation of the EM
registration callback. The new mechanism relies on the new OPP feature
allowing to get power (which is coming from "opp-microwatt" DT property)
expressed in micro-Watts.

The patch also opens new opportunity to better support platforms, which
have a decent static power. It allows to register the EM based on real
power measurements which models total power (static + dynamic), so better
reflects real HW.

Signed-off-by: Lukasz Luba 
Signed-off-by: Viresh Kumar

OPP: Add "opp-microwatt" supporting code

2022-03-03T04:05:04+00:00

Add new property to the OPP: power value. The OPP entry in the DT can have
"opp-microwatt". Add the needed code to handle this new property in the
existing infrastructure.

Signed-off-by: Lukasz Luba 
Signed-off-by: Viresh Kumar

opp: Expose of-node's name in debugfs

2022-02-11T04:29:04+00:00

It is difficult to find which OPPs are active at the moment, specially
if there are multiple OPPs with same frequency available in the device
tree (controlled by supported hardware feature).

Expose name of the DT node to find out the exact OPP.

While at it, also expose level field.

Reported-by: Leo Yan 
Tested-by: Leo Yan 
Signed-off-by: Viresh Kumar

opp: Fix return in _opp_add_static_v2()

2021-10-08T07:54:46+00:00

Fix sparse warning:
drivers/opp/of.c:924 _opp_add_static_v2() warn: passing zero to 'ERR_PTR'

For duplicate OPPs 'ret' be set to zero.

Fixes: deac8703da5f ("PM / OPP: _of_add_opp_table_v2(): increment count only if OPP is added")
Signed-off-by: YueHaibing 
Signed-off-by: Viresh Kumar

opp: Add more resource-managed variants of dev_pm_opp_of_add_table()

2021-10-04T11:03:15+00:00

Add resource-managed variants of dev_pm_opp_of_add_table_indexed() and
dev_pm_opp_of_add_table_noclk(), allowing drivers to remove boilerplate
code.

Signed-off-by: Dmitry Osipenko 
[ Viresh: Added underscore to devm_of_add_table_indexed() ]
Signed-off-by: Viresh Kumar

opp: Change type of dev_pm_opp_attach_genpd(names) argument

2021-10-04T09:08:59+00:00

Elements of the 'names' array are not changed by the code, constify them
for consistency.

Signed-off-by: Dmitry Osipenko 
Signed-off-by: Viresh Kumar

opp: Fix required-opps phandle array count check

2021-10-04T06:53:09+00:00

The 'required-opps' property is optional. So of_count_phandle_with_args()
can return -ENOENT when queried for required-opps. Handle this case.

Signed-off-by: Pavankumar Kondeti 
Signed-off-by: Viresh Kumar

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

2021-08-30T17:25:42+00:00

* pm-pci:
  PCI: PM: Enable PME if it can be signaled from D3cold
  PCI: PM: Avoid forcing PCI_D0 for wakeup reasons inconsistently
  PCI: Use pci_update_current_state() in pci_enable_device_flags()

* pm-sleep:
  PM: sleep: unmark 'state' functions as kernel-doc
  PM: sleep: check RTC features instead of ops in suspend_test
  PM: sleep: s2idle: Replace deprecated CPU-hotplug functions

* pm-domains:
  PM: domains: Fix domain attach for CONFIG_PM_OPP=n
  arm64: dts: sc7180: Add required-opps for i2c
  PM: domains: Add support for 'required-opps' to set default perf state
  opp: Don't print an error if required-opps is missing

* powercap:
  powercap: Add Power Limit4 support for Alder Lake SoC
  powercap: intel_rapl: Replace deprecated CPU-hotplug functions

Merge back new PM domains material for v5.15.

2021-08-30T17:20:32+00:00

opp: core: Check for pending links before reading required_opp pointers

2021-08-23T07:14:55+00:00

Commit 4fa82a87ba55 ("opp: Allow required-opps to be used for non genpd
use cases") dereferences the pointers in required_opp_tables but these
might be set to an ERR_PTR if the list still has lazy links pending,
resulting in segfaults.  Prior to this patch IS_ERR was also checked on
required_opp_tables[i] before reading ->is_genpd inside
_opp_table_alloc_required_tables, which is at the same time the
predicate to add this table to the lazy list.  This segfault is solved
by reordering the checks to bail on lazy pending tables before reading
->is_genpd.

Fixes: 4fa82a87ba55 ("opp: Allow required-opps to be used for non genpd use cases")
Reviewed-by: AngeloGioacchino Del Regno 
Signed-off-by: Marijn Suijten 
Signed-off-by: Viresh Kumar