diff options
Diffstat (limited to 'drivers/tty/serdev/core.c')
| -rw-r--r-- | drivers/tty/serdev/core.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 8f25510f89b6..bf88b95f7458 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -514,6 +514,25 @@ err_free: } EXPORT_SYMBOL_GPL(serdev_controller_alloc); +#ifdef CONFIG_OF +/** + * of_find_serdev_controller_by_node() - Find the serdev controller associated + * with the devicetree node + * @node: Devicetree node + * + * Return: Pointer to the serdev controller associated with the node. NULL if + * the controller is not found. Caller is responsible for calling + * serdev_controller_put() to drop the reference. + */ +struct serdev_controller *of_find_serdev_controller_by_node(struct device_node *node) +{ + struct device *dev = bus_find_device_by_of_node(&serdev_bus_type, node); + + return (dev && dev->type == &serdev_ctrl_type) ? to_serdev_controller(dev) : NULL; +} +EXPORT_SYMBOL_GPL(of_find_serdev_controller_by_node); +#endif + static int of_serdev_register_devices(struct serdev_controller *ctrl) { struct device_node *node; |