ENGR00283508-3 keyboard: imx: support pin sleep mode in suspend

When system suspend, need to switch keyboard pins to sleep mode,
this is to save IO power. Using pinctrl mode switch framework
to make it happen.

Signed-off-by: Anson Huang <b20788@freescale.com>

diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c
index 8280cb16260be6f31840480ca3fd19a64bfffa1c..3d4cf952075e44249ad640b84f3af2ec43e9aae3 100644 (file)
--- a/drivers/input/keyboard/imx_keypad.c
+++ b/drivers/input/keyboard/imx_keypad.c
@@ -1,6 +1,7 @@
 /*
  * Driver for the IMX keypad port.
  * Copyright (C) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -548,6 +549,8 @@ static int imx_kbd_suspend(struct device *dev)
 
        if (device_may_wakeup(&pdev->dev))
                enable_irq_wake(kbd->irq);
+       else
+               pinctrl_pm_select_sleep_state(dev);
 
        return 0;
 }
@@ -561,6 +564,8 @@ static int imx_kbd_resume(struct device *dev)
 
        if (device_may_wakeup(&pdev->dev))
                disable_irq_wake(kbd->irq);
+       else
+               pinctrl_pm_select_default_state(dev);
 
        mutex_lock(&input_dev->mutex);