diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 61fce1284f01..9a5873591a40 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -332,13 +332,56 @@ free_required_opps: return ret; } +static int _bandwidth_supported(struct device *dev, struct opp_table *opp_table) +{ + struct device_node *np, *opp_np; + struct property *prop; + + if (!opp_table) { + np = of_node_get(dev->of_node); + if (!np) + return -ENODEV; + + opp_np = _opp_of_get_opp_desc_node(np, 0); + of_node_put(np); + } else { + opp_np = of_node_get(opp_table->np); + } + + /* Lets not fail in case we are parsing opp-v1 bindings */ + if (!opp_np) + return 0; + + /* Checking only first OPP is sufficient */ + np = of_get_next_available_child(opp_np, NULL); + if (!np) { + dev_err(dev, "OPP table empty\n"); + return -EINVAL; + } + of_node_put(opp_np); + + prop = of_find_property(np, "opp-peak-kBps", NULL); + of_node_put(np); + + if (!prop || !prop->length) + return 0; + + return 1; +} + int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table) { struct device_node *np; - int ret = 0, i, count, num_paths; + int ret, i, count, num_paths; struct icc_path **paths; + ret = _bandwidth_supported(dev, opp_table); + if (ret <= 0) + return ret; + + ret = 0; + np = of_node_get(dev->of_node); if (!np) return 0;