Messages in this thread | | | Subject | Re: [PATCH v6 01/18] clk: introduce clk_hw_get_index_of_parent new API | From | Stephen Boyd <> | Date | Thu, 24 Mar 2022 18:21:58 -0700 |
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Quoting Ansuel Smith (2022-03-21 16:15:31) > Clk can have multiple parents. Some clk may require to get the cached > index of other parent that are not current associated with the clk. > We have clk_hw_get_parent_index() that returns the index of the current > parent but we can't get the index of other parents of the provided clk. > Introduce clk_hw_get_index_of_parent() to get the cached index of the > parent of the provided clk. This permits a direct access of the internal > clk_fetch_parent_index(). > > Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> > --- > drivers/clk/clk.c | 14 ++++++++++++++ > include/linux/clk-provider.h | 1 + > 2 files changed, 15 insertions(+) > > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c > index 8de6a22498e7..bdd70a88394c 100644 > --- a/drivers/clk/clk.c > +++ b/drivers/clk/clk.c > @@ -1726,6 +1726,20 @@ int clk_hw_get_parent_index(struct clk_hw *hw) > } > EXPORT_SYMBOL_GPL(clk_hw_get_parent_index); > > +/** > + * clk_hw_get_index_of_parent - return the index of the parent clock
s/return/get/
> + * @hw: clk_hw associated with the clk being consumed > + * @parent: clk_hw of the parent to be fetched the index of
s/to be fetched/to fetch/
> + * > + * Fetches and returns the index of parent clock provided. > + * Returns -EINVAL if the given parent index can't be provided.
I know this is copied from clk_hw_get_parent_index, but it can be improved.
Return: The index corresponding to @parent for @hw or -EINVAL if @parent isn't a possible parent of @hw.
> + */ > +int clk_hw_get_index_of_parent(struct clk_hw *hw, const struct clk_hw *parent) > +{ > + return clk_fetch_parent_index(hw->core, parent->core); > +} > +EXPORT_SYMBOL_GPL(clk_hw_get_index_of_parent); > + > /* > * Update the orphan status of @core and all its children. > */
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