dm: key: allow power key to skip irq handler init

At sometime, its parent driver would setup the main interrupt(e.g. PMIC).

Change-Id: I8d24266c48f515fc92c3529a5b6aa7a18d181af1
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

drivers/input/key-uclass.c

@@ -274,6 +274,9 @@ static int key_post_probe(struct udevice *dev)
 #ifdef CONFIG_IRQ
 			int irq;
 
+			if (uc_key->skip_irq_init)
+				return 0;
+
 			irq = phandle_gpio_to_irq(uc_key->gpios[0],
 						  uc_key->gpios[1]);
 			if (irq < 0) {

include/key.h

@@ -47,6 +47,8 @@ struct dm_key_uclass_platdata {
 
 	u32 trig_cnt;
 
+	int skip_irq_init;
+
 	/* Only for pwrkey gpio irq */
 	void (*irq_thread)(int irq, struct udevice *dev);
 };