Input: pxa27x_keypad direct key may be low active

KPDK_DK only indicates the pin level of direct key.
So it is related to board, and low level may be active which
indicates that a key is pressed.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

diff --git a/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h b/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
index abcc36e..7ffb16b 100644 (file)
--- a/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
+++ b/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
@@ -44,6 +44,8 @@ struct pxa27x_keypad_platform_data {
        /* direct keys */
        int             direct_key_num;
        unsigned int    direct_key_map[MAX_DIRECT_KEY_NUM];
+       /* the key output may be low active */
+       int             direct_key_low_active;
 
        /* rotary encoders 0 */
        int             enable_rotary0;

diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index 5d71720..a60f14e 100644 (file)
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -311,7 +311,15 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
        if (pdata->enable_rotary0 || pdata->enable_rotary1)
                pxa27x_keypad_scan_rotary(keypad);
 
-       new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
+       /*
+        * The KPDR_DK only output the key pin level, so it relates to board,
+        * and low level may be active.
+        */
+       if (pdata->direct_key_low_active)
+               new_state = ~KPDK_DK(kpdk) & keypad->direct_key_mask;
+       else
+               new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
+
        bits_changed = keypad->direct_key_state ^ new_state;
 
        if (bits_changed == 0)