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opp: Allow opp-level to be set to 0 

The DT bindings don't put such a constraint, nor should the kernel. It
is perfectly fine for opp-level to be set to 0, if we need to put the
performance state votes for a domain for a particular OPP.

Reported-by: Stephan Gerhold <stephan@gerhold.net>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2020-09-11 14:56:18 +05:30
parent cb60e9602c
commit a5663c9b1e
2 changed files with 7 additions and 16 deletions
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3
drivers/opp/core.c
View File

@ -2109,9 +2109,6 @@ int dev_pm_opp_xlate_performance_state(struct opp_table *src_table,
int dest_pstate = -EINVAL;
int i;
if (!pstate)
return 0;
/*
* Normally the src_table will have the "required_opps" property set to
* point to one of the OPPs in the dst_table, but in some cases the

20
drivers/opp/of.c
View File

@ -842,7 +842,7 @@ free_opp:
static int _of_add_opp_table_v2(struct device *dev, struct opp_table *opp_table)
{
struct device_node *np;
int ret, count = 0, pstate_count = 0;
int ret, count = 0;
struct dev_pm_opp *opp;
/* OPP table is already initialized for the device */
@ -876,20 +876,14 @@ static int _of_add_opp_table_v2(struct device *dev, struct opp_table *opp_table)
goto remove_static_opp;
}
list_for_each_entry(opp, &opp_table->opp_list, node)
pstate_count += !!opp->pstate;
/* Either all or none of the nodes shall have performance state set */
if (pstate_count && pstate_count != count) {
dev_err(dev, "Not all nodes have performance state set (%d: %d)\n",
count, pstate_count);
ret = -ENOENT;
goto remove_static_opp;
list_for_each_entry(opp, &opp_table->opp_list, node) {
/* Any non-zero performance state would enable the feature */
if (opp->pstate) {
opp_table->genpd_performance_state = true;
break;
}
}
if (pstate_count)
opp_table->genpd_performance_state = true;
return 0;
remove_static_opp: