* [PATCH 1/2] clk: Add clk_bulk_get_optional() function
[not found] <CGME20190619093950epcas2p3d6f7c26564844432f8153ee9b6a6007c@epcas2p3.samsung.com>
@ 2019-06-19 9:39 ` Sylwester Nawrocki
[not found] ` <CGME20190619094000epcas1p364fdcb03f801ec0ea3a533ead5ac2441@epcas1p3.samsung.com>
2019-06-25 21:22 ` [PATCH 1/2] clk: Add clk_bulk_get_optional() function Stephen Boyd
0 siblings, 2 replies; 4+ messages in thread
From: Sylwester Nawrocki @ 2019-06-19 9:39 UTC (permalink / raw)
To: linux-clk
Cc: mturquette, sboyd, b.zolnierkie, m.szyprowski, krzk, Sylwester Nawrocki
clk_bulk_get_optional() allows to get a group of clocks where one
or more is optional. For a not available clock, e.g. not specifed
in the clock consumer node in DT, its respective struct clk pointer
will be NULL. This allows for operating on a group of returned
clocks (struct clk_bulk_data array) with existing clk_bulk* APIs.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
drivers/clk/clk-bulk.c | 23 ++++++++++++++++++++---
include/linux/clk.h | 19 +++++++++++++++++++
2 files changed, 39 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/clk-bulk.c b/drivers/clk/clk-bulk.c
index 06499568cf076..524bf9a530985 100644
--- a/drivers/clk/clk-bulk.c
+++ b/drivers/clk/clk-bulk.c
@@ -75,8 +75,8 @@ void clk_bulk_put(int num_clks, struct clk_bulk_data *clks)
}
EXPORT_SYMBOL_GPL(clk_bulk_put);
-int __must_check clk_bulk_get(struct device *dev, int num_clks,
- struct clk_bulk_data *clks)
+static int __clk_bulk_get(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks, bool optional)
{
int ret;
int i;
@@ -88,10 +88,14 @@ int __must_check clk_bulk_get(struct device *dev, int num_clks,
clks[i].clk = clk_get(dev, clks[i].id);
if (IS_ERR(clks[i].clk)) {
ret = PTR_ERR(clks[i].clk);
+ clks[i].clk = NULL;
+
+ if (ret == -ENOENT && optional)
+ continue;
+
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get clk '%s': %d\n",
clks[i].id, ret);
- clks[i].clk = NULL;
goto err;
}
}
@@ -103,8 +107,21 @@ int __must_check clk_bulk_get(struct device *dev, int num_clks,
return ret;
}
+
+int __must_check clk_bulk_get(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks)
+{
+ return __clk_bulk_get(dev, num_clks, clks, false);
+}
EXPORT_SYMBOL(clk_bulk_get);
+int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks)
+{
+ return __clk_bulk_get(dev, num_clks, clks, true);
+}
+EXPORT_SYMBOL_GPL(clk_bulk_get_optional);
+
void clk_bulk_put_all(int num_clks, struct clk_bulk_data *clks)
{
if (IS_ERR_OR_NULL(clks))
diff --git a/include/linux/clk.h b/include/linux/clk.h
index f689fc58d7be3..98ea3e29f34b1 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -332,6 +332,19 @@ int __must_check clk_bulk_get(struct device *dev, int num_clks,
*/
int __must_check clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks);
+
+/**
+ * clk_bulk_get_optional - lookup and obtain a number of references to clock producer.
+ * @dev: device for clock "consumer"
+ * @num_clks: the number of clk_bulk_data
+ * @clks: the clk_bulk_data table of consumer
+ *
+ * Behaves the same as clk_bulk_get() except where there is no clock producer.
+ * In this case, instead of returning -ENOENT, the function returns 0 and
+ * NULL for a clk for which a clock producer could not be determined.
+ */
+int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks);
/**
* devm_clk_bulk_get - managed get multiple clk consumers
* @dev: device for clock "consumer"
@@ -718,6 +731,12 @@ static inline int __must_check clk_bulk_get(struct device *dev, int num_clks,
return 0;
}
+static inline int __must_check clk_bulk_get_optional(struct device *dev,
+ int num_clks, struct clk_bulk_data *clks)
+{
+ return 0;
+}
+
static inline int __must_check clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] clk: Add devm_clk_bulk_get_optional() function
[not found] ` <CGME20190619094000epcas1p364fdcb03f801ec0ea3a533ead5ac2441@epcas1p3.samsung.com>
@ 2019-06-19 9:39 ` Sylwester Nawrocki
2019-06-25 21:22 ` Stephen Boyd
0 siblings, 1 reply; 4+ messages in thread
From: Sylwester Nawrocki @ 2019-06-19 9:39 UTC (permalink / raw)
To: linux-clk
Cc: mturquette, sboyd, b.zolnierkie, m.szyprowski, krzk, Sylwester Nawrocki
Add managed version of the clk_bulk_get_optional() helper function.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
drivers/clk/clk-devres.c | 22 +++++++++++++++++++---
include/linux/clk.h | 28 ++++++++++++++++++++++++++++
2 files changed, 47 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
index daa1fc8fba537..f5f310ef001ac 100644
--- a/drivers/clk/clk-devres.c
+++ b/drivers/clk/clk-devres.c
@@ -52,8 +52,8 @@ static void devm_clk_bulk_release(struct device *dev, void *res)
clk_bulk_put(devres->num_clks, devres->clks);
}
-int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
- struct clk_bulk_data *clks)
+int __devm_clk_bulk_get(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks, bool optional)
{
struct clk_bulk_devres *devres;
int ret;
@@ -63,7 +63,10 @@ int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
if (!devres)
return -ENOMEM;
- ret = clk_bulk_get(dev, num_clks, clks);
+ if (optional)
+ ret = clk_bulk_get_optional(dev, num_clks, clks);
+ else
+ ret = clk_bulk_get(dev, num_clks, clks);
if (!ret) {
devres->clks = clks;
devres->num_clks = num_clks;
@@ -74,8 +77,21 @@ int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
return ret;
}
+
+int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks)
+{
+ return __devm_clk_bulk_get(dev, num_clks, clks, false);
+}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
+int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks)
+{
+ return __devm_clk_bulk_get(dev, num_clks, clks, true);
+}
+EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional);
+
int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 98ea3e29f34b1..d943ee204d68b 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -359,6 +359,28 @@ int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
*/
int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks);
+/**
+ * devm_clk_bulk_get_optional - managed get multiple optional consumer clocks
+ * @dev: device for clock "consumer"
+ * @clks: pointer to the clk_bulk_data table of consumer
+ *
+ * Behaves the same as devm_clk_bulk_get() except where there is no clock
+ * producer. In this case, instead of returning -ENOENT, the function returns
+ * NULL for given clk. It is assumed all clocks in clk_bulk_data are optional.
+ *
+ * Returns 0 if all clocks specified in clk_bulk_data table are obtained
+ * successfully or for any clk there was no clk provider available, otherwise
+ * returns valid IS_ERR() condition containing errno.
+ * The implementation uses @dev and @clk_bulk_data.id to determine the
+ * clock consumer, and thereby the clock producer.
+ * The clock returned is stored in each @clk_bulk_data.clk field.
+ *
+ * Drivers must assume that the clock source is not enabled.
+ *
+ * clk_bulk_get should not be called from within interrupt context.
+ */
+int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
+ struct clk_bulk_data *clks);
/**
* devm_clk_bulk_get_all - managed get multiple clk consumers
* @dev: device for clock "consumer"
@@ -760,6 +782,12 @@ static inline int __must_check devm_clk_bulk_get(struct device *dev, int num_clk
return 0;
}
+static inline int __must_check devm_clk_bulk_get_optional(struct device *dev,
+ int num_clks, struct clk_bulk_data *clks)
+{
+ return 0;
+}
+
static inline int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 1/2] clk: Add clk_bulk_get_optional() function
2019-06-19 9:39 ` [PATCH 1/2] clk: Add clk_bulk_get_optional() function Sylwester Nawrocki
[not found] ` <CGME20190619094000epcas1p364fdcb03f801ec0ea3a533ead5ac2441@epcas1p3.samsung.com>
@ 2019-06-25 21:22 ` Stephen Boyd
1 sibling, 0 replies; 4+ messages in thread
From: Stephen Boyd @ 2019-06-25 21:22 UTC (permalink / raw)
To: Sylwester Nawrocki, linux-clk
Cc: mturquette, b.zolnierkie, m.szyprowski, krzk, Sylwester Nawrocki
Quoting Sylwester Nawrocki (2019-06-19 02:39:25)
> clk_bulk_get_optional() allows to get a group of clocks where one
> or more is optional. For a not available clock, e.g. not specifed
> in the clock consumer node in DT, its respective struct clk pointer
> will be NULL. This allows for operating on a group of returned
> clocks (struct clk_bulk_data array) with existing clk_bulk* APIs.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> ---
Applied to clk-next
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] clk: Add devm_clk_bulk_get_optional() function
2019-06-19 9:39 ` [PATCH 2/2] clk: Add devm_clk_bulk_get_optional() function Sylwester Nawrocki
@ 2019-06-25 21:22 ` Stephen Boyd
0 siblings, 0 replies; 4+ messages in thread
From: Stephen Boyd @ 2019-06-25 21:22 UTC (permalink / raw)
To: Sylwester Nawrocki, linux-clk
Cc: mturquette, b.zolnierkie, m.szyprowski, krzk, Sylwester Nawrocki
Quoting Sylwester Nawrocki (2019-06-19 02:39:26)
> Add managed version of the clk_bulk_get_optional() helper function.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> ---
Applied to clk-next
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-06-25 21:22 UTC | newest]
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[not found] <CGME20190619093950epcas2p3d6f7c26564844432f8153ee9b6a6007c@epcas2p3.samsung.com>
2019-06-19 9:39 ` [PATCH 1/2] clk: Add clk_bulk_get_optional() function Sylwester Nawrocki
[not found] ` <CGME20190619094000epcas1p364fdcb03f801ec0ea3a533ead5ac2441@epcas1p3.samsung.com>
2019-06-19 9:39 ` [PATCH 2/2] clk: Add devm_clk_bulk_get_optional() function Sylwester Nawrocki
2019-06-25 21:22 ` Stephen Boyd
2019-06-25 21:22 ` [PATCH 1/2] clk: Add clk_bulk_get_optional() function Stephen Boyd
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