leds: Add ASIC3 LED support

Add LED support for the HTC ASIC3. Underlying support is provided by the mfd/asic3 and leds/leds-asic3 drivers. An example configuration is provided by the pxa/hx4700 platform.

Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 1d027b4..23f0d5e 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -389,6 +389,16 @@
 	  and 5Big Network v2 boards. The LEDs are wired to a CPLD and are
 	  controlled through a GPIO extension bus.
 
+config LEDS_ASIC3
+	bool "LED support for the HTC ASIC3"
+	depends on MFD_ASIC3
+	default y
+	help
+	  This option enables support for the LEDs on the HTC ASIC3. The HTC
+	  ASIC3 LED GPIOs are inputs, not outputs, thus the leds-gpio driver
+	  cannot be used. This driver supports hardware blinking with an on+off
+	  period from 62ms to 125s. Say Y to enable LEDs on the HP iPAQ hx4700.
+
 config LEDS_TRIGGERS
 	bool "LED Trigger support"
 	depends on LEDS_CLASS