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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: James Hogan <james.hogan@imgtec.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Mike Turquette <mturquette@linaro.org>
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@ -559,6 +559,19 @@ struct clk *__clk_get_parent(struct clk *clk)
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return !clk ? NULL : clk->parent;
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}
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struct clk *clk_get_parent_by_index(struct clk *clk, u8 index)
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{
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if (!clk || index >= clk->num_parents)
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return NULL;
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else if (!clk->parents)
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return __clk_lookup(clk->parent_names[index]);
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else if (!clk->parents[index])
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return clk->parents[index] =
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__clk_lookup(clk->parent_names[index]);
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else
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return clk->parents[index];
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}
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unsigned int __clk_get_enable_count(struct clk *clk)
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{
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return !clk ? 0 : clk->enable_count;
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@ -1316,13 +1329,7 @@ static struct clk *__clk_init_parent(struct clk *clk)
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kzalloc((sizeof(struct clk*) * clk->num_parents),
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GFP_KERNEL);
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if (!clk->parents)
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ret = __clk_lookup(clk->parent_names[index]);
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else if (!clk->parents[index])
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ret = clk->parents[index] =
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__clk_lookup(clk->parent_names[index]);
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else
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ret = clk->parents[index];
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ret = clk_get_parent_by_index(clk, index);
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out:
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return ret;
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@ -420,6 +420,7 @@ const char *__clk_get_name(struct clk *clk);
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struct clk_hw *__clk_get_hw(struct clk *clk);
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u8 __clk_get_num_parents(struct clk *clk);
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struct clk *__clk_get_parent(struct clk *clk);
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struct clk *clk_get_parent_by_index(struct clk *clk, u8 index);
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unsigned int __clk_get_enable_count(struct clk *clk);
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unsigned int __clk_get_prepare_count(struct clk *clk);
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unsigned long __clk_get_rate(struct clk *clk);
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