diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> | 2026-03-26 13:36:30 +0530 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> | 2026-03-31 09:48:42 +0200 |
| commit | a2b4814190af5944b276c5fd708d95ea146106b3 (patch) | |
| tree | 59d0b9d5e6c4a6ca544d46781f017bbba2a8505d /drivers | |
| parent | e7fef85039ccdba67d97b2a09f313aceeb6691c8 (diff) | |
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: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260326-pci-m2-e-v7-2-43324a7866e6@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Diffstat (limited to 'drivers')
| -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; |