From a8981d4f80b010666ad754d20a4f389f94d6726d Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 13 Oct 2014 23:41:49 -0600 Subject: dm: core: Add functions for iterating through device children Buses need to iterate through their children in some situations. Add a few functions to make this easy. Signed-off-by: Simon Glass Acked-by: Jagannadha Sutradharudu Teki --- drivers/core/device.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'drivers') diff --git a/drivers/core/device.c b/drivers/core/device.c index 32e80e8..9538874 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -514,3 +514,30 @@ int device_get_child_by_of_offset(struct udevice *parent, int seq, ret = device_find_child_by_of_offset(parent, seq, &dev); return device_get_device_tail(dev, ret, devp); } + +int device_find_first_child(struct udevice *parent, struct udevice **devp) +{ + if (list_empty(&parent->child_head)) { + *devp = NULL; + } else { + *devp = list_first_entry(&parent->child_head, struct udevice, + sibling_node); + } + + return 0; +} + +int device_find_next_child(struct udevice **devp) +{ + struct udevice *dev = *devp; + struct udevice *parent = dev->parent; + + if (list_is_last(&dev->sibling_node, &parent->child_head)) { + *devp = NULL; + } else { + *devp = list_entry(dev->sibling_node.next, struct udevice, + sibling_node); + } + + return 0; +} -- cgit v1.1