[PATCH 1/4] clk: core: introduce clk_hw_set_parent()
From: Neil Armstrong <hidden>
Date: 2019-07-29 13:17:08
Also in:
linux-amlogic, linux-clk, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
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 <redacted> Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> --- drivers/clk/clk.c | 6 ++++++ include/linux/clk-provider.h | 1 + 2 files changed, 7 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index c0990703ce54..c11b1781d24a 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c@@ -2487,6 +2487,12 @@ static int clk_core_set_parent_nolock(struct clk_core *core, 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
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2ae7604783dd..dce5521a9bf6 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h@@ -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);
--
2.22.0
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