ARM: pxa168: added keypad wake clear event support for platform

Signed-off-by: Mark F. Brown <mark.brown314@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-mmp/include/mach/pxa168.h

@@ -5,6 +5,7 @@ struct sys_timer;
 
 extern struct sys_timer pxa168_timer;
 extern void __init pxa168_init_irq(void);
+extern void pxa168_clear_keypad_wakeup(void);
 
 #include <linux/i2c.h>
 #include <mach/devices.h>
@@ -12,6 +13,7 @@ extern void __init pxa168_init_irq(void);
 #include <plat/pxa3xx_nand.h>
 #include <video/pxa168fb.h>
 #include <plat/pxa27x_keypad.h>
+#include <mach/cputype.h>
 
 extern struct pxa_device_desc pxa168_device_uart1;
 extern struct pxa_device_desc pxa168_device_uart2;
@@ -109,6 +111,9 @@ static inline int pxa168_add_fb(struct pxa168fb_mach_info *mi)
 
 static inline int pxa168_add_keypad(struct pxa27x_keypad_platform_data *data)
 {
+	if (cpu_is_pxa168())
+		data->clear_wakeup_event = pxa168_clear_keypad_wakeup;
+
 	return pxa_register_device(&pxa168_device_keypad, data, sizeof(*data));
 }
 

arch/arm/mach-mmp/pxa168.c

@@ -136,6 +136,16 @@ struct sys_timer pxa168_timer = {
 	.init	= pxa168_timer_init,
 };
 
+void pxa168_clear_keypad_wakeup(void)
+{
+	uint32_t val;
+	uint32_t mask = APMU_PXA168_KP_WAKE_CLR;
+
+	/* wake event clear is needed in order to clear keypad interrupt */
+	val = __raw_readl(APMU_WAKE_CLR);
+	__raw_writel(val |  mask, APMU_WAKE_CLR);
+}
+
 /* on-chip devices */
 PXA168_DEVICE(uart1, "pxa2xx-uart", 0, UART1, 0xd4017000, 0x30, 21, 22);
 PXA168_DEVICE(uart2, "pxa2xx-uart", 1, UART2, 0xd4018000, 0x30, 23, 24);