dm: core: Split out alloc code into a new function

Add a new function to handle the allocation of private/platform data for
a device. This will make it easier to skip this feature when using the new
of-platdata.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 52 insertions, 37 deletions

diff --git a/drivers/core/device.c b/drivers/core/device.c
index a4c8310f81..72169632c8 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -323,34 +323,17 @@ static void *alloc_priv(int size, uint flags)
 	return priv;
 }
 
-int device_of_to_plat(struct udevice *dev)
+/**
+ * device_alloc_priv() - Allocate priv/plat data required by the device
+ *
+ * @dev: Device to process
+ * @return 0 if OK, -ENOMEM if out of memory
+ */
+static int device_alloc_priv(struct udevice *dev)
 {
 	const struct driver *drv;
-	int size = 0;
 	void *ptr;
-	int ret;
-
-	if (!dev)
-		return -EINVAL;
-
-	if (dev->flags & DM_FLAG_PLATDATA_VALID)
-		return 0;
-
-	/* Ensure all parents have ofdata */
-	if (dev->parent) {
-		ret = device_of_to_plat(dev->parent);
-		if (ret)
-			goto fail;
-
-		/*
-		 * The device might have already been probed during
-		 * the call to device_probe() on its parent device
-		 * (e.g. PCI bridge devices). Test the flags again
-		 * so that we don't mess up the device.
-		 */
-		if (dev->flags & DM_FLAG_PLATDATA_VALID)
-			return 0;
-	}
+	int size;
 
 	drv = dev->driver;
 	assert(drv);
@@ -358,20 +341,17 @@ int device_of_to_plat(struct udevice *dev)
 	/* Allocate private data if requested and not reentered */
 	if (drv->priv_auto && !dev_get_priv(dev)) {
 		ptr = alloc_priv(drv->priv_auto, drv->flags);
-		if (!ptr) {
-			ret = -ENOMEM;
-			goto fail;
-		}
+		if (!ptr)
+			return -ENOMEM;
 		dev_set_priv(dev, ptr);
 	}
+
 	/* Allocate private data if requested and not reentered */
 	size = dev->uclass->uc_drv->per_device_auto;
 	if (size && !dev_get_uclass_priv(dev)) {
 		ptr = alloc_priv(size, dev->uclass->uc_drv->flags);
-		if (!ptr) {
-			ret = -ENOMEM;
-			goto fail;
-		}
+		if (!ptr)
+			return -ENOMEM;
 		dev_set_uclass_priv(dev, ptr);
 	}
 
@@ -382,14 +362,49 @@ int device_of_to_plat(struct udevice *dev)
 			size = dev->parent->uclass->uc_drv->per_child_auto;
 		if (size && !dev_get_parent_priv(dev)) {
 			ptr = alloc_priv(size, drv->flags);
-			if (!ptr) {
-				ret = -ENOMEM;
-				goto fail;
-			}
+			if (!ptr)
+				return -ENOMEM;
 			dev_set_parent_priv(dev, ptr);
 		}
 	}
 
+	return 0;
+}
+
+int device_of_to_plat(struct udevice *dev)
+{
+	const struct driver *drv;
+	int ret;
+
+	if (!dev)
+		return -EINVAL;
+
+	if (dev->flags & DM_FLAG_PLATDATA_VALID)
+		return 0;
+
+	/* Ensure all parents have ofdata */
+	if (dev->parent) {
+		ret = device_of_to_plat(dev->parent);
+		if (ret)
+			goto fail;
+
+		/*
+		 * The device might have already been probed during
+		 * the call to device_probe() on its parent device
+		 * (e.g. PCI bridge devices). Test the flags again
+		 * so that we don't mess up the device.
+		 */
+		if (dev->flags & DM_FLAG_PLATDATA_VALID)
+			return 0;
+	}
+
+	ret = device_alloc_priv(dev);
+	if (ret)
+		goto fail;
+
+	drv = dev->driver;
+	assert(drv);
+
 	if (drv->of_to_plat &&
 	    (CONFIG_IS_ENABLED(OF_PLATDATA) || dev_has_of_node(dev))) {
 		ret = drv->of_to_plat(dev);