This can be useful when clock core wants to enable/disable clocks.
Then we don't have to convert the struct clk_core to struct clk to call
clk_enable/clk_disable which is a bit un-align with exist using.
And after introduce clk_core_{enable|disable}_lock, we can refine
clk_eanble and clk_disable a bit.
As well as clk_core_{enable|disable}_lock, we also added
clk_core_{prepare|unprepare}_lock and clk_core_prepare_enable/
clk_core_unprepare_disable for clock core to easily use.
Cc: Mike Turquette <mturque...@linaro.org>
Cc: Stephen Boyd <sb...@codeaurora.org>
Signed-off-by: Dong Aisheng <aisheng.d...@freescale.com>
---
drivers/clk/clk.c | 85 +++++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 63 insertions(+), 22 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 4c7f7b2..c2310d5 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -583,6 +583,13 @@ static void clk_core_unprepare(struct clk_core *core)
clk_core_unprepare(core->parent);
}
+static void clk_core_unprepare_lock(struct clk_core *core)
+{
+ clk_prepare_lock();
+ clk_core_unprepare(core);
+ clk_prepare_unlock();
+}
+
/**
* clk_unprepare - undo preparation of a clock source
* @clk: the clk being unprepared
@@ -599,9 +606,7 @@ void clk_unprepare(struct clk *clk)
if (IS_ERR_OR_NULL(clk))
return;
- clk_prepare_lock();
- clk_core_unprepare(clk->core);
- clk_prepare_unlock();
+ clk_core_unprepare_lock(clk->core);
}
EXPORT_SYMBOL_GPL(clk_unprepare);
@@ -637,6 +642,17 @@ static int clk_core_prepare(struct clk_core *core)
return 0;
}
+static int clk_core_prepare_lock(struct clk_core *core)
+{
+ int ret;
+
+ clk_prepare_lock();
+ ret = clk_core_prepare(core);
+ clk_prepare_unlock();
+
+ return ret;
+}
+
/**
* clk_prepare - prepare a clock source
* @clk: the clk being prepared
@@ -651,16 +667,10 @@ static int clk_core_prepare(struct clk_core *core)
*/
int clk_prepare(struct clk *clk)
{
- int ret;
-
if (!clk)
return 0;
- clk_prepare_lock();
- ret = clk_core_prepare(clk->core);
- clk_prepare_unlock();
-
- return ret;
+ return clk_core_prepare_lock(clk->core);
}
EXPORT_SYMBOL_GPL(clk_prepare);
@@ -687,6 +697,15 @@ static void clk_core_disable(struct clk_core *core)
clk_core_disable(core->parent);
}
+static void clk_core_disable_lock(struct clk_core *core)
+{
+ unsigned long flags;
+
+ flags = clk_enable_lock();
+ clk_core_disable(core);
+ clk_enable_unlock(flags);
+}
+
/**
* clk_disable - gate a clock
* @clk: the clk being gated
@@ -701,14 +720,10 @@ static void clk_core_disable(struct clk_core *core)
*/
void clk_disable(struct clk *clk)
{
- unsigned long flags;
-
if (IS_ERR_OR_NULL(clk))
return;
- flags = clk_enable_lock();
- clk_core_disable(clk->core);
- clk_enable_unlock(flags);
+ clk_core_disable_lock(clk->core);
}
EXPORT_SYMBOL_GPL(clk_disable);
@@ -747,6 +762,18 @@ static int clk_core_enable(struct clk_core *core)
return 0;
}
+static int clk_core_enable_lock(struct clk_core *core)
+{
+ unsigned long flags;
+ int ret;
+
+ flags = clk_enable_lock();
+ ret = clk_core_enable(core);
+ clk_enable_unlock(flags);
+
+ return ret;
+}
+
/**
* clk_enable - ungate a clock
* @clk: the clk being ungated
@@ -762,19 +789,33 @@ static int clk_core_enable(struct clk_core *core)
*/
int clk_enable(struct clk *clk)
{
- unsigned long flags;
- int ret;
-
if (!clk)
return 0;
- flags = clk_enable_lock();
- ret = clk_core_enable(clk->core);
- clk_enable_unlock(flags);
+ return clk_core_enable_lock(clk->core);
+}
+EXPORT_SYMBOL_GPL(clk_enable);
+
+static int clk_core_prepare_enable(struct clk_core *core)
+{
+ int ret;
+
+ ret = clk_core_prepare_lock(core);
+ if (ret)
+ return ret;
+
+ ret = clk_core_enable_lock(core);
+ if (ret)
+ clk_core_unprepare_lock(core);
return ret;
}
-EXPORT_SYMBOL_GPL(clk_enable);
+
+static void clk_core_disable_unprepare(struct clk_core *core)
+{
+ clk_core_disable_lock(core);
+ clk_core_unprepare_lock(core);
+}
static int clk_core_round_rate_nolock(struct clk_core *core,
struct clk_rate_request *req)
--
1.9.1
--
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