linux-stable.git/drivers/opp/of.c, branch v5.18.2

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: 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: 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 back new PM domains material for v5.15.

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

opp: Don't print an error if required-opps is missing

2021-08-16T16:45:29+00:00

The 'required-opps' property is considered optional, hence remove
the pr_err() in of_parse_required_opp() when we find the property is
missing.
While at it, also fix the return value of
of_get_required_opp_performance_state() when of_parse_required_opp()
fails, return a -ENODEV instead of the -EINVAL.

Signed-off-by: Rajendra Nayak 
Reviewed-by: Ulf Hansson 
Acked-by: Viresh Kumar 
Signed-off-by: Rafael J. Wysocki

opp: remove WARN when no valid OPPs remain

2021-08-04T04:01:25+00:00

This WARN can be triggered per-core and the stack trace is not useful.
Replace it with plain dev_err(). Fix a comment while at it.

Signed-off-by: Michał Mirosław 
Signed-off-by: Viresh Kumar

opp: Allow required-opps to be used for non genpd use cases

2021-06-18T03:30:55+00:00

Don't limit required_opp_table to genpd only. One possible use case is
cpufreq based devfreq governor, which can use required-opps property to
derive devfreq from cpufreq.

Though the OPP core still doesn't support non-genpd required-opps in
_set_required_opps().

Suggested-by: Chanwoo Choi 
Signed-off-by: Hsin-Yi Wang 
[ Viresh: Update _set_required_opps() to check for genpd ]
Signed-off-by: Viresh Kumar

opp: use list_del_init instead of list_del/INIT_LIST_HEAD

2021-05-20T04:02:40+00:00

Using list_del_init() instead of list_del() + INIT_LIST_HEAD()
to simpify the code.

Signed-off-by: Yang Yingliang 
Signed-off-by: Viresh Kumar