[PATCH] ARM: pxa27x_keypad: added a comment to explain clear_wakeup_event callback
Mark F. Brown
mark.brown314 at gmail.com
Sun Sep 5 11:33:10 EDT 2010
Signed-off-by: Mark F. Brown <mark.brown314 at gmail.com>
---
arch/arm/plat-pxa/include/plat/pxa27x_keypad.h | 9 +++++++++
1 files changed, 9 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 73dacda..abcc36e 100644
--- a/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
+++ b/arch/arm/plat-pxa/include/plat/pxa27x_keypad.h
@@ -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 +59,8 @@ struct pxa27x_keypad_platform_data {
/* key debounce interval */
unsigned int debounce_interval;
+
+ /* clear wakeup event requirement for pxa168 */
void (*clear_wakeup_event)(void);
};
--
1.7.0.4
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