[net-next PATCH v2 06/13] leds: trigger: netdev: add basic check for hw control support

[Christian Marangi <ansuelsmth@gmail.com>]

Add basic check for hw control support. Check if the required API are
defined and check if the defined trigger supported in hw control for the
LED driver match netdev.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/leds/trigger/ledtrig-netdev.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index e1f3cedd5d57..2101cbbda707 100644
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -92,8 +92,22 @@ static void set_baseline_state(struct led_netdev_data *trigger_data)
 	}
 }
 
+static bool supports_hw_control(struct led_classdev *led_cdev)
+{
+	if (!led_cdev->hw_control_get || !led_cdev->hw_control_set ||
+	    !led_cdev->hw_control_is_supported)
+		return false;
+
+	return !strcmp(led_cdev->hw_control_trigger, led_cdev->trigger->name);
+}
+
 static bool can_hw_control(struct led_netdev_data *trigger_data)
 {
+	struct led_classdev *led_cdev = trigger_data->led_cdev;
+
+	if (!supports_hw_control(led_cdev))
+		return false;
+
 	return false;
 }
 
-- 
2.39.2