[PATCH V6 3/4] clk: add managed version of clk_bulk_get_all

Dong Aisheng
2018-08-31T04:45:55Z

This patch introduces the managed version of clk_bulk_get_all.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
v3->v4:
* improve 'devres->clks = *clks' according to Stephen's suggestion
v2->v3:
* a minor fix of build warning on PowerPC platform.
v1->v2:
* new patch
---
drivers/clk/clk-devres.c | 24 ++++++++++++++++++++++++
include/linux/clk.h | 23 +++++++++++++++++++++++
2 files changed, 47 insertions(+)

diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
index d854e26..12c8745 100644
--- a/drivers/clk/clk-devres.c
+++ b/drivers/clk/clk-devres.c
@@ -70,6 +70,30 @@ int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get);

+int __must_check devm_clk_bulk_get_all(struct device *dev,
+ struct clk_bulk_data **clks)
+{
+ struct clk_bulk_devres *devres;
+ int ret;
+
+ devres = devres_alloc(devm_clk_bulk_release,
+ sizeof(*devres), GFP_KERNEL);
+ if (!devres)
+ return -ENOMEM;
+
+ ret = clk_bulk_get_all(dev, &devres->clks);
+ if (ret > 0) {
+ *clks = devres->clks;
+ devres->num_clks = ret;
+ devres_add(dev, devres);
+ } else {
+ devres_free(devres);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
+
static int devm_clk_match(struct device *dev, void *res, void *data)
{
struct clk **c = res;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index e9433c7..c705271 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -346,6 +346,22 @@ int __must_check clk_bulk_get_all(struct device *dev,
*/
int __must_check devm_clk_bulk_get(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"
+ * @clks: pointer to the clk_bulk_data table of consumer
+ *
+ * Returns a positive value for the number of clocks obtained while the
+ * clock references are stored in the clk_bulk_data table in @clks field.
+ * Returns 0 if there're none and a negative value if something failed.
+ *
+ * This helper function allows drivers to get several clk
+ * consumers in one operation with management, the clks will
+ * automatically be freed when the device is unbound.
+ */
+
+int __must_check devm_clk_bulk_get_all(struct device *dev,
+ struct clk_bulk_data **clks);

/**
* devm_clk_get - lookup and obtain a managed reference to a clock producer.
@@ -691,6 +707,13 @@ 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_all(struct device *dev,
+ struct clk_bulk_data **clks)
+{
+
+ return 0;
+}
+
static inline struct clk *devm_get_clk_from_child(struct device *dev,
struct device_node *np, const char *con_id)
{
--
2.7.4