leds: Add driver for HP harddisk protection LEDs

HP notebooks contain accelerometer-based disk protection subsystem,
and LED that indicates hard disk is protected. This is driver for the
LED part.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index a4f7a3a..33ff1cb 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -113,6 +113,13 @@
 	  outputs. To be useful the particular board must have LEDs
 	  and they must be connected to the GPIO lines.
 
+config LEDS_HP_DISK
+	tristate "LED Support for disk protection LED on HP notebooks"
+	depends on LEDS_CLASS && ACPI
+	help
+	  This option enable support for disk protection LED, found on
+	  newer HP notebooks.
+
 config LEDS_CLEVO_MAIL
 	tristate "Mail LED on Clevo notebook (EXPERIMENTAL)"
 	depends on LEDS_CLASS && X86 && SERIO_I8042 && DMI && EXPERIMENTAL