clk: add managed version of clk_bulk_get_all

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>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
index d854e26a8ddbca3dfb96aad123e974f2175cc455..12c87457eca1e73d4c568bc34a98296c961c6c3c 100644 (file)
--- 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 e9433c76757b5f0816d464d6135a6c7c91c1bb44..c705271dc1f2bfd42ab7abd8677ba44d46002753 100644 (file)
--- 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)
 {