clk: core: introduce clk_hw_set_parent() (3567894b) · Commits · 戴 / test

Introduce the clk_hw_set_parent() provider call to change parent of a clock by using the clk_hw pointers. This eases the clock reparenting from clock rate notifiers and implementing DVFS with simpler code avoiding the boilerplates functions as __clk_lookup(clk_hw_get_name()) then clk_set_parent(). Signed-off-by:

Neil Armstrong <narmstrong@baylibre.com> Acked-by:

Martin Blumenstingl <martin.blumenstingl@googlemail.com> Acked-by:

Stephen Boyd <sboyd@kernel.org> Signed-off-by:

Jerome Brunet <jbrunet@baylibre.com>

drivers/clk/clk.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -2487,6 +2487,12 @@ runtime_put:
		return ret;
		}

		int clk_hw_set_parent(struct clk_hw hw, struct clk_hw parent)
		{
		return clk_core_set_parent_nolock(hw->core, parent->core);
		}
		EXPORT_SYMBOL_GPL(clk_hw_set_parent);

		/**
		* clk_set_parent - switch the parent of a mux clk
		* @clk: the mux clk whose input we are switching

include/linux/clk-provider.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -817,6 +817,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
		struct clk_hw clk_hw_get_parent(const struct clk_hw hw);
		struct clk_hw clk_hw_get_parent_by_index(const struct clk_hw hw,
		unsigned int index);
		int clk_hw_set_parent(struct clk_hw hw, struct clk_hw new_parent);
		unsigned int __clk_get_enable_count(struct clk *clk);
		unsigned long clk_hw_get_rate(const struct clk_hw *hw);
		unsigned long __clk_get_flags(struct clk *clk);

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