dm: Add child_pre_probe() and child_post_remove() methods
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>
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 42d250f..166b073 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -291,6 +291,12 @@
}
dev->seq = seq;
+ if (dev->parent && dev->parent->driver->child_pre_probe) {
+ ret = dev->parent->driver->child_pre_probe(dev);
+ if (ret)
+ goto fail;
+ }
+
if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
ret = drv->ofdata_to_platdata(dev);
if (ret)
@@ -352,12 +358,20 @@
goto err_remove;
}
+ if (dev->parent && dev->parent->driver->child_post_remove) {
+ ret = dev->parent->driver->child_post_remove(dev);
+ if (ret) {
+ dm_warn("%s: Device '%s' failed child_post_remove()",
+ __func__, dev->name);
+ }
+ }
+
device_free(dev);
dev->seq = -1;
dev->flags &= ~DM_FLAG_ACTIVATED;
- return 0;
+ return ret;
err_remove:
/* We can't put the children back */