linux-kernel - [PATCH v2 4/6] ARM: pxa27x_keypad: added wakeup event handler for keypad interrupts

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Date:	Thu, 26 Aug 2010 11:27:35 -0400
From:	"Mark F. Brown" <mark.brown314@...il.com>
To:	Eric Miao <eric.y.miao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...vell.com>,
	"Mark F. Brown" <mark.brown314@...il.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Cc:	"Mark F. Brown" <mark.brown314@...il.com>
Subject: [PATCH v2 4/6] ARM: pxa27x_keypad: added wakeup event handler for keypad interrupts

mach-mmp needs to clear wake event in order to clear the keypad interrupt

Signed-off-by: Mark F. Brown <mark.brown314@...il.com>
---
 arch/arm/plat-pxa/include/plat/pxa27x_keypad.h |    1 +
 drivers/input/keyboard/pxa27x_keypad.c         |   10 ++++++++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h b/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
index 7b4eadc..73dacda 100644
--- a/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
+++ b/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
@@ -52,6 +52,7 @@ struct pxa27x_keypad_platform_data {
 
 	/* key debounce interval */
 	unsigned int	debounce_interval;
+	void		(*clear_wakeup_event)(void);
 };
 
 extern void pxa_set_keypad_info(struct pxa27x_keypad_platform_data *info);
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index 0610d10..b36d2be 100644
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -330,11 +330,21 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
 	keypad->direct_key_state = new_state;
 }
 
+static void clear_wakeup_event(struct pxa27x_keypad *keypad)
+{
+	struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+
+	if (pdata->clear_wakeup_event)
+		(pdata->clear_wakeup_event)();
+}
+
 static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
 {
 	struct pxa27x_keypad *keypad = dev_id;
 	unsigned long kpc = keypad_readl(KPC);
 
+	clear_wakeup_event(keypad);
+
 	if (kpc & KPC_DI)
 		pxa27x_keypad_scan_direct(keypad);
 
-- 
1.7.0.4

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