clk: Introduce optional unprepare_unused callback
An unprepare_unused callback is introduced due to the same reasons to
why the disable_unused callback was added.
During the clk_disable_unused sequence, those clk_hw that needs specific
treatment with regards to being unprepared, shall implement the
unprepare_unused callback.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index ee946862..56e6cc1 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -49,6 +49,10 @@
* This function is allowed to sleep. Optional, if this op is not
* set then the prepare count will be used.
*
+ * @unprepare_unused: Unprepare the clock atomically. Only called from
+ * clk_disable_unused for prepare clocks with special needs.
+ * Called with prepare mutex held. This function may sleep.
+ *
* @enable: Enable the clock atomically. This must not return until the
* clock is generating a valid clock signal, usable by consumer
* devices. Called with enable_lock held. This function must not
@@ -113,6 +117,7 @@
int (*prepare)(struct clk_hw *hw);
void (*unprepare)(struct clk_hw *hw);
int (*is_prepared)(struct clk_hw *hw);
+ void (*unprepare_unused)(struct clk_hw *hw);
int (*enable)(struct clk_hw *hw);
void (*disable)(struct clk_hw *hw);
int (*is_enabled)(struct clk_hw *hw);
