In common clock framework the relation b/w parent and child clocks is determined based on the udevice parent/child information. A clock parent could be changed based on devices needs. In case this is happen the functionalities for clock who's parent is changed are broken. Add a function that reparent a device. This will be used in clk-uclass.c to reparent a clock device.
Signed-off-by: Claudiu Beznea claudiu.beznea@microchip.com --- drivers/core/device.c | 26 ++++++++++++++++++++++++++ include/dm/device-internal.h | 9 +++++++++ 2 files changed, 35 insertions(+)
diff --git a/drivers/core/device.c b/drivers/core/device.c index a7408d9c76c6..f149d55ac1e1 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -267,6 +267,32 @@ int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, devp); }
+int device_reparent(struct udevice *dev, struct udevice *new_parent) +{ + struct udevice *cparent; + struct udevice *pos, *n; + + if (!dev || !new_parent) + return -EINVAL; + + if (!dev->parent) + return -ENODEV; + + list_for_each_entry_safe(pos, n, &dev->parent->child_head, + sibling_node) { + if (pos->driver != dev->driver) + continue; + + list_del(&dev->sibling_node); + list_add_tail(&dev->sibling_node, &new_parent->child_head); + dev->parent = new_parent; + + return 0; + } + + return -ENODEV; +} + static void *alloc_priv(int size, uint flags) { void *priv; diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h index 294d6c18105a..c5d7ec0650f9 100644 --- a/include/dm/device-internal.h +++ b/include/dm/device-internal.h @@ -84,6 +84,15 @@ int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, const struct driver_info *info, struct udevice **devp);
/** + * device_reparent: reparent the device to a new parent + * + * @dev: pointer to device to be reparented + * @new_parent: pointer to new parent device + * @return 0 if OK, -ve on error + */ +int device_reparent(struct udevice *dev, struct udevice *new_parent); + +/** * device_ofdata_to_platdata() - Read platform data for a device * * Read platform data for a device (typically from the device tree) so that