[BATTERY] Universal power supply class (was: battery class)

This class is result of "external power" and "battery" classes merge,
as suggested by David Woodhouse. He also implemented uevent support.

Here how userspace seeing it now:

    	# ls /sys/class/power\ supply/
    	ac  main-battery  usb

    	# cat /sys/class/power\ supply/ac/type
    	AC

    	# cat /sys/class/power\ supply/usb/type
    	USB

    	# cat /sys/class/power\ supply/main-battery/type
    	Battery

    	# cat /sys/class/power\ supply/ac/online
    	1

    	# cat /sys/class/power\ supply/usb/online
    	0

    	# cat /sys/class/power\ supply/main-battery/status
    	Charging

    	# cat /sys/class/leds/h5400\:red-left/trigger
    	none h5400-radio timer hwtimer ac-online usb-online
    	main-battery-charging-or-full [main-battery-charging]
    	main-battery-full

Signed-off-by: Anton Vorontsov <cbou@mail.ru>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
new file mode 100644
index 000000000000..7811fa627412
--- /dev/null
+++ b/drivers/power/Kconfig
@@ -0,0 +1,17 @@
+menuconfig POWER_SUPPLY
+        tristate "Power supply class support"
+        help
+          Say Y here to enable power supply class support. This allows
+          power supply (batteries, AC, USB) monitoring by userspace
+          via sysfs and uevent (if available) and/or APM kernel interface
+          (if selected below).
+
+if POWER_SUPPLY
+
+config POWER_SUPPLY_DEBUG
+        bool "Power supply debug"
+        help
+          Say Y here to enable debugging messages for power supply class
+          and drivers.
+
+endif # POWER_SUPPLY