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authorSimon Glass <sjg@chromium.org>2018-11-18 08:14:31 -0700
committerSimon Glass <sjg@chromium.org>2018-11-29 09:30:05 -0700
commit3abe1115355900172a8681f5e6fa01ca71a9b916 (patch)
tree9c2aeebe14de6b7c227845d8b2df0372bc81cd8f /drivers/core/device.c
parentd0b4f68d199c075f5d734cf184f7eaf1a642083d (diff)
dm: core: Add a few more specific child-finding functions
Add two functions which can find a child device by uclass or by name. The first is useful with Multi-Function-Devices (MFDs) to find one of a particular type. The second is useful when only the name is known. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/core/device.c')
-rw-r--r--drivers/core/device.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 47a697f3e5..836bcadced 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -699,6 +699,40 @@ int device_find_first_inactive_child(struct udevice *parent,
return -ENODEV;
}
+int device_find_first_child_by_uclass(struct udevice *parent,
+ enum uclass_id uclass_id,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+
+ *devp = NULL;
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ if (device_get_uclass_id(dev) == uclass_id) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int device_find_child_by_name(struct udevice *parent, const char *name,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+
+ *devp = NULL;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ if (!strcmp(dev->name, name)) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
struct udevice *dev_get_parent(const struct udevice *child)
{
return child->parent;