[PATCH v4 1/5] OPP: Allow required-opps even if the device doesn't have power-domains

[Saravana Kannan]

A Device-A can have a (minimum) performance requirement on another
Device-B to be able to function correctly. This performance requirement
on Device-B can also change based on the current performance level of
Device-A.

The existing required-opps feature fits well to describe this need. So,
instead of limiting required-opps to point to only PM-domain devices,
allow it to point to any device.

Signed-off-by: Saravana Kannan <sarava...@google.com>
---
 drivers/opp/core.c |  2 +-
 drivers/opp/of.c   | 11 -----------
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index c094d5d20fd7..438fcd134d93 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -707,7 +707,7 @@ static int _set_required_opps(struct device *dev,
                return 0;
 
        /* Single genpd case */
-       if (!genpd_virt_devs) {
+       if (!genpd_virt_devs && required_opp_tables[0]->is_genpd) {
                pstate = likely(opp) ? opp->required_opps[0]->pstate : 0;
                ret = dev_pm_genpd_set_performance_state(dev, pstate);
                if (ret) {
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index b313aca9894f..ff88eaf66b56 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -197,17 +197,6 @@ static void _opp_table_alloc_required_tables(struct 
opp_table *opp_table,
 
                if (IS_ERR(required_opp_tables[i]))
                        goto free_required_tables;
-
-               /*
-                * We only support genpd's OPPs in the "required-opps" for now,
-                * as we don't know how much about other cases. Error out if the
-                * required OPP doesn't belong to a genpd.
-                */
-               if (!required_opp_tables[i]->is_genpd) {
-                       dev_err(dev, "required-opp doesn't belong to genpd: 
%pOF\n",
-                               required_np);
-                       goto free_required_tables;
-               }
        }
 
        goto put_np;
-- 
2.22.0.709.g102302147b-goog