22  *       - pen down detection
272  * If a value other than 0 is set then WM97xx pen detection will be
329 	 * pen down operation then we need to schedule polls while the  in wm97xx_pen_interrupt()
330 	 * pen is down.  Otherwise the machine driver is responsible  in wm97xx_pen_interrupt()
335 			/* Data is not available immediately on pen down */  in wm97xx_pen_interrupt()
339 		/* Let ts_reader report the pen up for debounce. */  in wm97xx_pen_interrupt()
351  * initialise pen IRQ handler and workqueue
359 				 "wm97xx-pen", wm)) {  in wm97xx_init_pen_irq()
361 			"Failed to register pen down interrupt, polling");  in wm97xx_init_pen_irq()
394 			dev_dbg(wm->dev, "pen up\n");  in wm97xx_read_samples()
400 			* pen is down, the user never will be able to  in wm97xx_read_samples()
406 			* pen is up and quickly restore it to ~one task  in wm97xx_read_samples()
407 			* switch when pen is down again.  in wm97xx_read_samples()
415 			"pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n",  in wm97xx_read_samples()
436 		dev_dbg(wm->dev, "pen down\n");  in wm97xx_read_samples()
501 	/* If we either don't have an interrupt for pen down events or  in wm97xx_ts_input_open()