if (unlikely(!target_freq)) {
if (opp_table->required_opp_tables) {
ret = _set_required_opps(dev, opp_table, NULL);
+ } else if (!_get_opp_count(opp_table)) {
+ return 0;
} else {
dev_err(dev, "target frequency can't be 0\n");
ret = -EINVAL;
goto put_opp_table;
}
+ /*
+ * For IO devices which require an OPP on some platforms/SoCs
+ * while just needing to scale the clock on some others
+ * we look for empty OPP tables with just a clock handle and
+ * scale only the clk. This makes dev_pm_opp_set_rate()
+ * equivalent to a clk_set_rate()
+ */
+ if (!_get_opp_count(opp_table)) {
+ ret = _generic_set_opp_clk_only(dev, clk, freq);
+ goto put_opp_table;
+ }
+
temp_freq = old_freq;
old_opp = _find_freq_ceil(opp_table, &temp_freq);
if (IS_ERR(old_opp)) {