@@ -183,6 +183,43 @@ struct led_classdev {
/* LEDs that have private triggers have this set */
struct led_hw_trigger_type *trigger_type;
+
+ /* Unique trigger name supported by LED set in hw control mode */
+ const char *hw_control_trigger;
+ /*
+ * Check if the LED driver supports the requested mode provided by the
+ * defined supported trigger to setup the LED to hw control mode.
+ *
+ * Return 0 on success. Return -EOPNOTSUPP when the passed flags are not
+ * supported and software fallback needs to be used.
+ * Return a negative error number on any other case for check fail due
+ * to various reason like device not ready or timeouts.
+ */
+ int (*hw_control_is_supported)(struct led_classdev *led_cdev,
+ unsigned long flags);
+ /*
+ * Activate hardware control, LED driver will use the provided flags
+ * from the supported trigger and setup the LED to be driven by hardware
+ * following the requested mode from the trigger flags.
+ * Deactivate hardware blink control by setting brightness to LED_OFF via
+ * the brightness_set() callback.
+ *
+ * Return 0 on success, a negative error number on flags apply fail.
+ */
+ int (*hw_control_set)(struct led_classdev *led_cdev,
+ unsigned long flags);
+ /*
+ * Get from the LED driver the current mode that the LED is set in hw
+ * control mode and put them in flags.
+ * Trigger can use this to get the initial state of a LED already set in
+ * hardware blink control.
+ *
+ * Return 0 on success, a negative error number on failing parsing the
+ * initial mode. Error from this function is NOT FATAL as the device
+ * may be in a not supported initial state by the attached LED trigger.
+ */
+ int (*hw_control_get)(struct led_classdev *led_cdev,
+ unsigned long *flags);
#endif
#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED