platform: tegra_prod: Add devm_tegra_prod_get_from_node()

Add managed version of the prod API devm_tegra_prod_get_from_node() so
that client need not to explicitly clean the allocated resources.

Change-Id: I9dbc7f16228dd8179ef123e55a0ff8be3753d447
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/1175452
Reviewed-on: https://git-master.nvidia.com/r/1768538
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 40 insertions, 0 deletions

diff --git a/drivers/platform/tegra/tegra_prod.c b/drivers/platform/tegra/tegra_prod.c
index 89246a6d6..269da5a47 100644
--- a/drivers/platform/tegra/tegra_prod.c
+++ b/drivers/platform/tegra/tegra_prod.c
@@ -557,3 +557,25 @@ struct tegra_prod *tegra_prod_get_from_node(struct device_node *np)
         return tegra_prod_init(np);
 }
 EXPORT_SYMBOL(tegra_prod_get_from_node);
+
+struct tegra_prod *devm_tegra_prod_get_from_node(struct device *dev,
+                                                 struct device_node *np)
+{
+        struct tegra_prod **ptr, *prod_list;
+
+        ptr = devres_alloc(devm_tegra_prod_release, sizeof(*ptr), GFP_KERNEL);
+        if (!ptr)
+                return ERR_PTR(-ENOMEM);
+
+        prod_list = tegra_prod_init(np);
+        if (IS_ERR(prod_list)) {
+                devres_free(ptr);
+                return prod_list;
+        }
+
+        *ptr = prod_list;
+        devres_add(dev, ptr);
+
+        return prod_list;
+}
+EXPORT_SYMBOL(devm_tegra_prod_get_from_node);
diff --git a/include/linux/tegra_prod.h b/include/linux/tegra_prod.h
index c79519c50..37e84022b 100644
--- a/include/linux/tegra_prod.h
+++ b/include/linux/tegra_prod.h
@@ -88,6 +88,24 @@ struct tegra_prod *devm_tegra_prod_get(struct device *dev);
 struct tegra_prod *tegra_prod_get_from_node(struct device_node *np);
 
 /**
+ * devm_tegra_prod_get_from_node(): Get the prod handle from the node.
+ * @dev: Device handle.
+ * @np: Node pointer on which prod setting nodes are available.
+ *
+ * Parse the prod-setting node of the node pointer "np" and keep all prod
+ * setting data in prod handle.
+ * This handle is used for setting prod configurations.
+ *
+ * Returns valid prod_list handle on success or pointer to the error
+ * when it failed.
+ * The allocated resource is released by driver core framework when device
+ * is unbinded and so no need to call any release APIs for the tegra_prod
+ * handle.
+ */
+struct tegra_prod *devm_tegra_prod_get_from_node(struct device *dev,
+                                                 struct device_node *np);
+
+/**
  * tegra_prod_put(): Put the allocated prod handle.
  * @tegra_prod: Tegra prod handle which was allocated by function
  *              devm_tegra_prod_get() or tegra_prod_get_from_node().