Input: pxa27x_keypad - add wakeup support

Signed-off-by: Eric Miao <[e-mail]>
Acked-by: Russell King <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/keyboard/pxa27x_keypad.c

···
 	struct input_dev *input_dev;
 	void __iomem *mmio_base;
 
+	int irq;
+
 	/* matrix key code map */
 	unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
 
···
 	struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
 
 	clk_disable(keypad->clk);
+
+	if (device_may_wakeup(&pdev->dev))
+		enable_irq_wake(keypad->irq);
+
 	return 0;
 }
 
···
 {
 	struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
 	struct input_dev *input_dev = keypad->input_dev;
+
+	if (device_may_wakeup(&pdev->dev))
+		disable_irq_wake(keypad->irq);
 
 	mutex_lock(&input_dev->mutex);
 
···
 		goto failed_free_dev;
 	}
 
+	keypad->irq = irq;
+
 	/* Register the input device */
 	error = input_register_device(input_dev);
 	if (error) {
 		dev_err(&pdev->dev, "failed to register input device\n");
 		goto failed_free_irq;
 	}
+
+	device_init_wakeup(&pdev->dev, 1);
 
 	return 0;
 
···
 	struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
 	struct resource *res;
 
-	free_irq(platform_get_irq(pdev, 0), pdev);
+	free_irq(keypad->irq, pdev);
 
 	clk_disable(keypad->clk);
 	clk_put(keypad->clk);