Re: [PATCH v6 01/18] clk: introduce clk_hw_get_index_of_parent new API
From: Stephen Boyd <sboyd@kernel.org>
Date: 2022-03-25 01:22:07
Also in:
linux-arm-msm, linux-devicetree, lkml
Quoting Ansuel Smith (2022-03-21 16:15:31)
quoted hunk ↗ jump to hunk
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.
*/