From: Simon Glass <sjg@chromium.org>
Date: Mon, 27 Jan 2020 15:49:36 +0000 (-0700)
Subject: dm: core: Use const where possible in device.h
X-Git-Tag: submit/tizen_6.0/20211217.073345~32
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a15a5b0d0be462ed915b1d5d4b104025b9170840;p=platform%2Fkernel%2Fu-boot.git

dm: core: Use const where possible in device.h

Update this header file to use const devices where possible, to permit
callers to also use const.

Change-Id: I9c0bcba75fee845672234a29dfa7723b61f6bc39
Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/drivers/core/device.c b/drivers/core/device.c
index ace2b1d617..228f99eeb5 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -597,6 +597,17 @@ int device_get_child(const struct udevice *parent, int index,
 	return -ENODEV;
 }
 
+int device_get_child_count(const struct udevice *parent)
+{
+	struct udevice *dev;
+	int count = 0;
+
+	list_for_each_entry(dev, &parent->child_head, sibling_node)
+		count++;
+
+	return count;
+}
+
 int device_find_child_by_seq(const struct udevice *parent, int seq_or_req_seq,
 			     bool find_req_seq, struct udevice **devp)
 {
diff --git a/include/dm/device.h b/include/dm/device.h
index 3deee4e151..1e6bd615d1 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -411,6 +411,15 @@ const char *dev_get_uclass_name(const struct udevice *dev);
 int device_get_child(const struct udevice *parent, int index,
 		     struct udevice **devp);
 
+/**
+ * device_get_child_count() - Get the available child count of a device
+ *
+ * Returns the number of children to a device.
+ *
+ * @parent:	Parent device to check
+ */
+int device_get_child_count(const struct udevice *parent);
+
 /**
  * device_find_child_by_seq() - Find a child device based on a sequence
  *