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dm: Add child_pre_probe() and child_post_remove() methods

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Some devices (particularly bus devices) must track their children, knowing
when a new child is added so that it can be set up for communication on the
bus.

Add a child_pre_probe() method to provide this feature, and a corresponding
child_post_remove() method.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-07-23 06:55:21 -06:00
parent e59f458de6
commit a327dee0f4
5 changed files with 160 additions and 2 deletions
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6
include/dm/device.h
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@ -118,6 +118,10 @@ struct udevice_id {
* @remove: Called to remove a device, i.e. de-activate it
* @unbind: Called to unbind a device from its driver
* @ofdata_to_platdata: Called before probe to decode device tree data
* @child_pre_probe: Called before a child device is probed. The device has
* memory allocated but it has not yet been probed.
* @child_post_remove: Called after a child device is removed. The device
* has memory allocated but its device_remove() method has been called.
* @priv_auto_alloc_size: If non-zero this is the size of the private data
* to be allocated in the device's ->priv pointer. If zero, then the driver
* is responsible for allocating any data required.
@ -143,6 +147,8 @@ struct driver {
int (*remove)(struct udevice *dev);
int (*unbind)(struct udevice *dev);
int (*ofdata_to_platdata)(struct udevice *dev);
int (*child_pre_probe)(struct udevice *dev);
int (*child_post_remove)(struct udevice *dev);
int priv_auto_alloc_size;
int platdata_auto_alloc_size;
int per_child_auto_alloc_size;