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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@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Mark F. Brown 2010-09-03 18:28:09 -04:00 committed by Eric Miao
parent 2ce4389068
commit 3587c25807
2 changed files with 20 additions and 0 deletions
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10
arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
View File

@ -25,6 +25,13 @@
*
* 4. matrix key and direct key will use the same debounce_interval by
* default, which should be sufficient in most cases
*
* pxa168 keypad platform specific parameter
*
* NOTE:
* clear_wakeup_event callback is a workaround required to clear the
* keypad interrupt. The keypad wake must be cleared in addition to
* reading the MI/DI bits in the KPC register.
*/
struct pxa27x_keypad_platform_data {
@ -52,6 +59,9 @@ struct pxa27x_keypad_platform_data {
/* key debounce interval */
unsigned int debounce_interval;
/* clear wakeup event requirement for pxa168 */
void (*clear_wakeup_event)(void);
};
extern void pxa_set_keypad_info(struct pxa27x_keypad_platform_data *info);

10
drivers/input/keyboard/pxa27x_keypad.c
View File

@ -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);