Input: omap-keypad - clear interrupts on open

According to TRM, the recommended way for keyboard controller
initialization is clear the interrupt-status register, then set up
certain keyboard events for generating an interrupt request and
set up expected source of wake-up event that generates a wake-up
request.

Signed-off-by: Illia Smyrnov <illia.smyrnov@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index b876a0d8c6be..0244262e2600 100644
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -185,8 +185,9 @@ static int omap4_keypad_open(struct input_dev *input)
                         (OMAP4_VAL_PVT << OMAP4_DEF_CTRL_PTV_SHIFT));
         kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
                         OMAP4_VAL_DEBOUNCINGTIME);
+        /* clear pending interrupts */
         kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
-                        OMAP4_VAL_IRQDISABLE);
+                         kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
         kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
                         OMAP4_DEF_IRQENABLE_EVENTEN |
                                 OMAP4_DEF_IRQENABLE_LONGKEY);