| Message ID | 20190701091258.3870-3-narmstrong@baylibre.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | arm64: g12a: add support for DVFS | expand |
On Mon, Jul 1, 2019 at 11:13 AM Neil Armstrong <narmstrong@baylibre.com> wrote: > > 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> for the same reason this is handy for the meson8b clock driver as well, so: Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index aa51756fd4d6..06e1abe3391c 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2490,6 +2490,12 @@ 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 bb6118f79784..8a453380f9a4 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -812,6 +812,7 @@ 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);
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> --- drivers/clk/clk.c | 6 ++++++ include/linux/clk-provider.h | 1 + 2 files changed, 7 insertions(+)