diff options
Diffstat (limited to 'drivers/opp/of.c')
| -rw-r--r-- | drivers/opp/of.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 282eb5966fd0..55c8cfef97d4 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -1444,6 +1444,38 @@ put_required_np: EXPORT_SYMBOL_GPL(of_get_required_opp_performance_state); /** + * dev_pm_opp_of_has_required_opp - Find out if a required-opps exists. + * @dev: The device to investigate. + * + * Returns true if the device's node has a "operating-points-v2" property and if + * the corresponding node for the opp-table describes opp nodes that uses the + * "required-opps" property. + * + * Return: True if a required-opps is present, else false. + */ +bool dev_pm_opp_of_has_required_opp(struct device *dev) +{ + struct device_node *opp_np, *np; + int count; + + opp_np = _opp_of_get_opp_desc_node(dev->of_node, 0); + if (!opp_np) + return false; + + np = of_get_next_available_child(opp_np, NULL); + of_node_put(opp_np); + if (!np) { + dev_warn(dev, "Empty OPP table\n"); + return false; + } + + count = of_count_phandle_with_args(np, "required-opps", NULL); + of_node_put(np); + + return count > 0; +} + +/** * dev_pm_opp_get_of_node() - Gets the DT node corresponding to an opp * @opp: opp for which DT node has to be returned for * |