[RFC PATCH v1 1/3] clk: abstract parent cache
From: James Hogan <hidden>
Date: 2013-03-22 15:44:58
Also in:
lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
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 <redacted> --- 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