The API's related to clk disable operation does not explicitly
states the synchoronous or asynchrous behaviour as it is driver
dependent. So make this part clear in API documentation.
Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v2:
* New patch.
---
drivers/clk/clk.c | 3 ++-
include/linux/clk-provider.h | 3 ++-
include/linux/clk.h | 3 ++-
3 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 2253c154a824..9a09f51f4af1 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -988,7 +988,8 @@ static void clk_core_unprepare_lock(struct clk_core *core)
* if the operation may sleep. One example is a clk which is accessed over
* I2c. In the complex case a clk gate operation may require a fast and a slow
* part. It is this reason that clk_unprepare and clk_disable are not mutually
- * exclusive. In fact clk_disable must be called before clk_unprepare.
+ * exclusive. In fact clk_disable must be called before clk_unprepare. The
+ * synchronous or asynchronous clock gating operation is driver dependent.
*/
void clk_unprepare(struct clk *clk)
{
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 1293c38ddb7f..50cd0f8d37cb 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -113,7 +113,8 @@ struct clk_duty {
* sleep.
*
* @disable: Disable the clock atomically. Called with enable_lock held.
- * This function must not sleep.
+ * This function must not sleep. The synchronous or asynchronous
+ * disabling of the clock is driver dependent.
*
* @is_enabled: Queries the hardware to determine if the clock is enabled.
* This function must not sleep. Optional, if this op is not
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 06f1b292f8a0..e6acec5d8dbe 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -653,7 +653,8 @@ int __must_check clk_bulk_enable(int num_clks,
* @clk: clock source
*
* Inform the system that a clock source is no longer required by
- * a driver and may be shut down.
+ * a driver and may be shut down. It is not guaranteed to ever actually
+ * be stopped, that will be driver dependent.
*
* May be called from atomic contexts.
*
--
2.25.1
