Input: export input_default_setkeycode

Export input_default_setkeycode so that a driver can set a custom
setkeycode handler to take some driver specific action but still call
the default handler at some point.

Signed-off-by: Fabio Baltieri <fabiobaltieri@chromium.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260222003717.471977-1-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/input.c b/drivers/input/input.c
index a500e1e276c211d1146dbfea421a3402084007f8..c227eaa6271a42c0d168faf933a5f454e8ccdc6c 100644 (file)
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -800,14 +800,30 @@ static int input_default_getkeycode(struct input_dev *dev,
        return 0;
 }
 
-static int input_default_setkeycode(struct input_dev *dev,
-                                   const struct input_keymap_entry *ke,
-                                   unsigned int *old_keycode)
+/**
+ * input_default_setkeycode - default setkeycode method
+ * @dev: input device which keymap is being updated.
+ * @ke: new keymap entry.
+ * @old_keycode: pointer to the location where old keycode should be stored.
+ *
+ * This function is the default implementation of &input_dev.setkeycode()
+ * method. It is typically used when a driver does not provide its own
+ * implementation, but it is also exported so drivers can extend it.
+ *
+ * The function must be called with &input_dev.event_lock held.
+ *
+ * Return: 0 on success, or a negative error code on failure.
+ */
+int input_default_setkeycode(struct input_dev *dev,
+                            const struct input_keymap_entry *ke,
+                            unsigned int *old_keycode)
 {
        unsigned int index;
        int error;
        int i;
 
+       lockdep_assert_held(&dev->event_lock);
+
        if (!dev->keycodesize)
                return -EINVAL;
 
@@ -861,6 +877,7 @@ static int input_default_setkeycode(struct input_dev *dev,
        __set_bit(ke->keycode, dev->keybit);
        return 0;
 }
+EXPORT_SYMBOL(input_default_setkeycode);
 
 /**
  * input_get_keycode - retrieve keycode currently mapped to a given scancode

diff --git a/include/linux/input.h b/include/linux/input.h
index 7d7cb0593a63e93c4906c49cde430188db2d1ab5..06ca62328db1ea56beb5985869df1727e9605965 100644 (file)
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -517,6 +517,10 @@ INPUT_GENERATE_ABS_ACCESSORS(res, resolution)
 int input_scancode_to_scalar(const struct input_keymap_entry *ke,
                             unsigned int *scancode);
 
+int input_default_setkeycode(struct input_dev *dev,
+                            const struct input_keymap_entry *ke,
+                            unsigned int *old_keycode);
+
 int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke);
 int input_set_keycode(struct input_dev *dev,
                      const struct input_keymap_entry *ke);