diff options
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index ed763c7e98fc..1c625764133d 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -547,6 +547,26 @@ void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate, EXPORT_SYMBOL_GPL(clk_hw_set_rate_range); /* + * Aggregate the rate of all child nodes which are enabled and exclude the + * child node which requests for clk_aggregate_rate. + */ +unsigned long clk_aggregate_rate(struct clk_hw *hw, + const struct clk_core *parent) +{ + struct clk_core *child; + unsigned long aggre_rate = 0; + + hlist_for_each_entry(child, &parent->children, child_node) { + if (child->enable_count && + strcmp(child->name, hw->init->name)) + aggre_rate = max(child->rate, aggre_rate); + } + + return aggre_rate; +} +EXPORT_SYMBOL_GPL(clk_aggregate_rate); + +/* * Helper for finding best parent to provide a given frequency. This can be used * directly as a determine_rate callback (e.g. for a mux), or from a more * complex clock that may combine a mux with other operations. |