Commit a2b48141 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Bartosz Golaszewski
Browse files

serdev: Add an API to find the serdev controller associated with the devicetree node 



Add of_find_serdev_controller_by_node() API to find the serdev controller
device associated with the devicetree node.

Tested-by: Hans de Goede <johannes.goede@oss.qualcomm.com> # ThinkPad T14s gen6 (arm64)
Reviewed-by: default avatarBartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260326-pci-m2-e-v7-2-43324a7866e6@oss.qualcomm.com


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
parent e7fef850

drivers/tty/serdev/core.c

+19 −0
Original line number Diff line number Diff line
@@ -514,6 +514,25 @@ struct serdev_controller *serdev_controller_alloc(struct device *host, 
}

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;

include/linux/serdev.h

+9 −0
Original line number Diff line number Diff line
@@ -334,4 +334,13 @@ static inline bool serdev_acpi_get_uart_resource(struct acpi_resource *ares, 
}

#endif /* CONFIG_ACPI */



#ifdef CONFIG_OF

struct serdev_controller *of_find_serdev_controller_by_node(struct device_node *node);

#else

static inline struct serdev_controller *of_find_serdev_controller_by_node(struct device_node *node)

{

	return NULL;

}

#endif /* CONFIG_OF */



#endif /*_LINUX_SERDEV_H */