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

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: 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: 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

opp: Drop empty-table checks from _put functions

2021-08-16T04:12:08+00:00

The current_opp is released only when whole OPP table is released,
otherwise it's only marked as removed by dev_pm_opp_remove_table().
Functions like dev_pm_opp_put_clkname() and dev_pm_opp_put_supported_hw()
are checking whether OPP table is empty and it's not if current_opp is
set since it holds the refcount of OPP, this produces a noisy warning
from these functions about busy OPP table. Remove the checks to fix it.

Cc: stable@vger.kernel.org
Fixes: 81c4d8a3c414 ("opp: Keep track of currently programmed OPP")
Signed-off-by: Dmitry Osipenko 
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: Change return type of devm_pm_opp_attach_genpd()

2021-03-16T04:44:11+00:00

Make devm_pm_opp_attach_genpd() to return error code instead of
opp_table pointer in order to have return type consistent with the
other resource-managed OPP helpers.

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

opp: Change return type of devm_pm_opp_register_set_opp_helper()

2021-03-16T04:44:11+00:00

Make devm_pm_opp_register_set_opp_helper() to return error code instead
of opp_table pointer in order to have return type consistent with the
other resource-managed OPP helpers.

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

opp: Add devres wrapper for dev_pm_opp_set_supported_hw

2021-03-15T03:56:53+00:00

Add devres wrapper for dev_pm_opp_set_supported_hw() to simplify drivers
code.

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

opp: Add devres wrapper for dev_pm_opp_set_regulators

2021-03-15T03:56:53+00:00

Add devres wrapper for dev_pm_opp_set_regulators() to simplify drivers
code.

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

opp: Add devres wrapper for dev_pm_opp_set_clkname

2021-03-15T03:56:53+00:00

Add devres wrapper for dev_pm_opp_set_clkname() to simplify drivers code.

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