Implement a apm_get_power_status handler for the n30.  The handler
gets the battery charge from the msp430 chip using i2c and sets the ac
line information based on GPG1 (charger power) and GPC7 (usb power).

Index: linux-2.6.14/arch/arm/mach-s3c2410/mach-n30.c
===================================================================
--- linux-2.6.14.orig/arch/arm/mach-s3c2410/mach-n30.c
+++ linux-2.6.14/arch/arm/mach-s3c2410/mach-n30.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/kthread.h>
+#include <linux/i2c.h>
 
 #include <linux/mmc/protocol.h>
 #include <linux/mtd/mtd.h>
@@ -44,6 +45,7 @@
 #include <asm/hardware/iomd.h>
 #include <asm/io.h>
 #include <asm/irq.h>
+#include <asm/apm.h>
 #include <asm/mach-types.h>
 
 #include <asm/arch/regs-serial.h>
@@ -527,6 +529,37 @@ static int n30_usbstart_thread(void *unu
 	return 0;
 }
 
+#ifdef CONFIG_APM
+static void n30_get_power_status(struct apm_power_info *info)
+{
+#ifdef CONFIG_I2C_S3C2410
+	u8 charge;
+	struct i2c_adapter *adap;
+	struct i2c_msg msg[] = {
+		{ .addr = 0x0b, .flags = I2C_M_RD, .buf = &charge, .len = 1 }
+	};
+
+	if ((adap = i2c_get_adapter(0)) != NULL) {
+		if (i2c_transfer(adap, msg, 1) == 1)
+			info->battery_life = charge;
+		i2c_put_adapter(adap);
+	}
+#endif
+
+	if (s3c2410_gpio_getpin(S3C2410_GPC7))
+		info->ac_line_status = 0x01; /* on charger power */
+	else if (s3c2410_gpio_getpin(S3C2410_GPG1))
+		info->ac_line_status = 0x02; /* on USB power */
+	else
+		info->ac_line_status = 0x00; /* on battery power */
+
+	/* TODO I could put some values in these variables based on
+	 * the battery life and the ac_line_status. --wingel */
+	info->battery_status = 0xff;
+	info->battery_flag   = 0xff;
+}
+#endif
+
 static void __init n30_init(void)
 {
 	s3c24xx_fb_set_platdata(&n30_lcdcfg);
@@ -550,6 +583,10 @@ static void __init n30_init(void)
 	s3c2410_gpio_setpin(S3C2410_GPC5, 1);
 
 	kthread_run(n30_usbstart_thread, NULL, "n30_usbstart");
+
+#ifdef CONFIG_APM
+	apm_get_power_status = n30_get_power_status;
+#endif
 }
 
 MACHINE_START(N30, "Acer-N30")