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Input: pxa27x_keypad - clear pending interrupts on keypad config

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Bootloader can leave interrupt bit pending, and it confuses driver.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Vasily Khoruzhick 2012-10-29 23:45:09 -07:00 committed by Dmitry Torokhov
parent b216e12d06
commit 904adede08
1 changed files with 3 additions and 0 deletions
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3
drivers/input/keyboard/pxa27x_keypad.c
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@ -368,6 +368,9 @@ static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
unsigned int mask = 0, direct_key_num = 0;
unsigned long kpc = 0;
/* clear pending interrupt bit */
keypad_readl(KPC);
/* enable matrix keys with automatic scan */
if (pdata->matrix_key_rows && pdata->matrix_key_cols) {
kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;