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-rw-r--r--drivers/opp/core.c12
-rw-r--r--drivers/opp/of.c20
-rw-r--r--drivers/opp/opp.h6
3 files changed, 29 insertions, 9 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 2d3d0d1180ea..23b086fcbf84 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -812,6 +812,9 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
mutex_init(&opp_table->lock);
INIT_LIST_HEAD(&opp_table->dev_list);
+ /* Mark regulator count uninitialized */
+ opp_table->regulator_count = -1;
+
opp_dev = _add_opp_dev(dev, opp_table);
if (!opp_dev) {
kfree(opp_table);
@@ -1028,7 +1031,7 @@ struct dev_pm_opp *_opp_allocate(struct opp_table *table)
int count, supply_size;
/* Allocate space for at least one supply */
- count = table->regulator_count ? table->regulator_count : 1;
+ count = table->regulator_count > 0 ? table->regulator_count : 1;
supply_size = sizeof(*opp->supplies) * count;
/* allocate new OPP node and supplies structures */
@@ -1433,7 +1436,7 @@ free_regulators:
kfree(opp_table->regulators);
opp_table->regulators = NULL;
- opp_table->regulator_count = 0;
+ opp_table->regulator_count = -1;
err:
dev_pm_opp_put_opp_table(opp_table);
@@ -1462,7 +1465,7 @@ void dev_pm_opp_put_regulators(struct opp_table *opp_table)
kfree(opp_table->regulators);
opp_table->regulators = NULL;
- opp_table->regulator_count = 0;
+ opp_table->regulator_count = -1;
put_opp_table:
dev_pm_opp_put_opp_table(opp_table);
@@ -1615,6 +1618,9 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
if (!opp_table)
return -ENOMEM;
+ /* Fix regulator count for dynamic OPPs */
+ opp_table->regulator_count = 1;
+
ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
if (ret)
dev_pm_opp_put_opp_table(opp_table);
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 38a08805a30c..6eb0198ab63d 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -150,12 +150,10 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
struct opp_table *opp_table)
{
u32 *microvolt, *microamp = NULL;
- int supplies, vcount, icount, ret, i, j;
+ int supplies = opp_table->regulator_count, vcount, icount, ret, i, j;
struct property *prop = NULL;
char name[NAME_MAX];
- supplies = opp_table->regulator_count ? opp_table->regulator_count : 1;
-
/* Search for "opp-microvolt-<name>" */
if (opp_table->prop_name) {
snprintf(name, sizeof(name), "opp-microvolt-%s",
@@ -170,7 +168,13 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
/* Missing property isn't a problem, but an invalid entry is */
if (!prop) {
- if (!opp_table->regulator_count)
+ if (unlikely(supplies == -1)) {
+ /* Initialize regulator_count */
+ opp_table->regulator_count = 0;
+ return 0;
+ }
+
+ if (!supplies)
return 0;
dev_err(dev, "%s: opp-microvolt missing although OPP managing regulators\n",
@@ -179,6 +183,14 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
}
}
+ if (unlikely(supplies == -1)) {
+ /* Initialize regulator_count */
+ supplies = opp_table->regulator_count = 1;
+ } else if (unlikely(!supplies)) {
+ dev_err(dev, "%s: opp-microvolt wasn't expected\n", __func__);
+ return -EINVAL;
+ }
+
vcount = of_property_count_u32_elems(opp->np, name);
if (vcount < 0) {
dev_err(dev, "%s: Invalid %s property (%d)\n",
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index 9c6544b4f4f9..14d732ccad08 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -138,7 +138,9 @@ enum opp_table_access {
* @prop_name: A name to postfix to many DT properties, while parsing them.
* @clk: Device's clock handle
* @regulators: Supply regulators
- * @regulator_count: Number of power supply regulators
+ * @regulator_count: Number of power supply regulators. Its value can be -1
+ * (uninitialized), 0 (no opp-microvolt property) or > 0 (has opp-microvolt
+ * property).
* @genpd_performance_state: Device's power domain support performance state.
* @set_opp: Platform specific set_opp callback
* @set_opp_data: Data to be passed to set_opp callback
@@ -176,7 +178,7 @@ struct opp_table {
const char *prop_name;
struct clk *clk;
struct regulator **regulators;
- unsigned int regulator_count;
+ int regulator_count;
bool genpd_performance_state;
int (*set_opp)(struct dev_pm_set_opp_data *data);