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-rw-r--r--drivers/opp/of.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 62504b18f198..c10c782d15aa 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -173,7 +173,7 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
struct opp_table **required_opp_tables;
struct device **genpd_virt_devs = NULL;
struct device_node *required_np, *np;
- int count, i;
+ int count, count_pd, i;
/* Traversing the first OPP node is all we need */
np = of_get_next_available_child(opp_np, NULL);
@@ -186,7 +186,19 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
if (!count)
goto put_np;
- if (count > 1) {
+ /*
+ * Check the number of power-domains to know if we need to deal
+ * with virtual devices. In some cases we have devices with multiple
+ * power domains but with only one of them being scalable, hence
+ * 'count' could be 1, but we still have to deal with multiple genpds
+ * and virtual devices.
+ */
+ count_pd = of_count_phandle_with_args(dev->of_node, "power-domains",
+ "#power-domain-cells");
+ if (!count_pd)
+ goto put_np;
+
+ if (count_pd > 1) {
genpd_virt_devs = kcalloc(count, sizeof(*genpd_virt_devs),
GFP_KERNEL);
if (!genpd_virt_devs)