Abstract access to the clock parent cache by defining
__clk_get_parent_by_index(clk, index). This allows access to parent
clocks from clock drivers.
Signed-off-by: James Hogan <james.ho...@imgtec.com>
---
drivers/clk/clk.c | 21 ++++++++++++++-------
include/linux/clk-provider.h | 1 +
2 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index ed87b24..79d5deb 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -415,6 +415,19 @@ struct clk *__clk_get_parent(struct clk *clk)
return !clk ? NULL : clk->parent;
}
+struct clk *__clk_get_parent_by_index(struct clk *clk, u8 index)
+{
+ if (!clk || index >= clk->num_parents)
+ return NULL;
+ else if (!clk->parents)
+ return __clk_lookup(clk->parent_names[index]);
+ else if (!clk->parents[index])
+ return clk->parents[index] =
+ __clk_lookup(clk->parent_names[index]);
+ else
+ return clk->parents[index];
+}
+
unsigned int __clk_get_enable_count(struct clk *clk)
{
return !clk ? 0 : clk->enable_count;
@@ -1150,13 +1163,7 @@ static struct clk *__clk_init_parent(struct clk *clk)
kzalloc((sizeof(struct clk*) * clk->num_parents),
GFP_KERNEL);
- if (!clk->parents)
- ret = __clk_lookup(clk->parent_names[index]);
- else if (!clk->parents[index])
- ret = clk->parents[index] =
- __clk_lookup(clk->parent_names[index]);
- else
- ret = clk->parents[index];
+ ret = __clk_get_parent_by_index(clk, index);
out:
return ret;
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 7f197d7..4e0b634 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -347,6 +347,7 @@ const char *__clk_get_name(struct clk *clk);
struct clk_hw *__clk_get_hw(struct clk *clk);
u8 __clk_get_num_parents(struct clk *clk);
struct clk *__clk_get_parent(struct clk *clk);
+struct clk *__clk_get_parent_by_index(struct clk *clk, u8 index);
unsigned int __clk_get_enable_count(struct clk *clk);
unsigned int __clk_get_prepare_count(struct clk *clk);
unsigned long __clk_get_rate(struct clk *clk);
--
1.8.1.2
--
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