small bit of style cleanup; added additional checks to see if a battery was damaged or it is just an empty slot

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41319 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/device/power_managment.h

@@ -1,13 +1,19 @@
+/*
+ * Copyright 2004-2011, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
 #ifndef POWER_MANAGMENT_H
 #define POWER_MANAGMENT_H
 
+
 #include <Drivers.h>
 
+
 // io controls
-enum { 
+enum {
 	// ioctl response with kMagicFreqID
 	IDENTIFY_DEVICE = B_DEVICE_OP_CODES_END + 20001,
-	
+
 	// CPU Frequence:
 	// get a list of freq_info, the list is terminated with a element with
 	// frequency = 0
@@ -20,13 +26,13 @@ enum {
 	WATCH_CPU_FREQ,
 	// stop all watching ioctl, ioctl return B_ERROR
 	STOP_WATCHING_CPU_FREQ,
-	
+
 	GET_BATTERY_INFO,
 	GET_EXTENDED_BATTERY_INFO,
 	WATCH_BATTERY,
 	STOP_WATCHING_BATTERY
-	
-}; 
+};
+
 
 // CPU Frequence:
 // magic id returned by IDENTIFY_DEVICE
@@ -35,6 +41,7 @@ const uint32 kMagicFreqID = 48921;
 
 #define MAX_CPU_FREQUENCY_STATES 10
 
+
 typedef struct {
 	uint16			frequency;	// [Mhz]
 	uint16			volts;
@@ -47,6 +54,8 @@ typedef struct {
 // magic id returned by IDENTIFY_DEVICE
 const uint32 kMagicACPIBatteryID = 17822;
 
+
+// Our known battery states
 #define BATTERY_DISCHARGING		0x01
 #define BATTERY_CHARGING		0x02
 #define BATTERY_CRITICAL_STATE	0x04
@@ -73,7 +82,7 @@ typedef struct {
 	char	model_number[32];
 	char	serial_number[32];
 	char	type[32];
-	char	oem_info[32];	
+	char	oem_info[32];
 } acpi_extended_battery_info;