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Commit 7ef3dcc8 authored by James Hogan's avatar James Hogan Committed by Mike Turquette
Browse files

clk: abstract parent cache 



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: default avatarJames Hogan <james.hogan@imgtec.com>
Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
parent 5cfe10bb

drivers/clk/clk.c

+14 −7
Original line number Diff line number Diff line
@@ -559,6 +559,19 @@ 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;
@@ -1316,13 +1329,7 @@ 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;

include/linux/clk-provider.h

+1 −0
Original line number Diff line number Diff line
@@ -420,6 +420,7 @@ 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);