counter: interrupt-cnt: add counter_push_event()

Add counter_push_event() to notify user space about new pulses

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Oleksij Rempel <[e-mail]>
Signed-off-by: William Breathitt Gray <[e-mail]>
Link: https://lore.kernel.org/r/9da3[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/counter/interrupt-cnt.c

···
 
 static irqreturn_t interrupt_cnt_isr(int irq, void *dev_id)
 {
-	struct interrupt_cnt_priv *priv = dev_id;
+	struct counter_device *counter = dev_id;
+	struct interrupt_cnt_priv *priv = counter_priv(counter);
 
 	atomic_inc(&priv->count);
+
+	counter_push_event(counter, COUNTER_EVENT_CHANGE_OF_STATE, 0);
 
 	return IRQ_HANDLED;
 }
···
 	irq_set_status_flags(priv->irq, IRQ_NOAUTOEN);
 	ret = devm_request_irq(dev, priv->irq, interrupt_cnt_isr,
 			       IRQF_TRIGGER_RISING | IRQF_NO_THREAD,
-			       dev_name(dev), priv);
+			       dev_name(dev), counter);
 	if (ret)
 		return ret;