leds: Add WM831x status LED driver

The WM831x devices feature two software controlled status LEDs with
hardware assisted blinking.

The device can also autonomously control the LEDs based on a selection
of sources.  This can be configured at boot time using either platform
data or the chip OTP.  A sysfs file in the style of that for triggers
allowing the control source to be configured at run time.  Triggers
can't be used here since they can't depend on the implementation details
of a specific LED type.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 7c8e7122aaa9..edfd4e302be7 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -195,6 +195,13 @@ config LEDS_PCA955X
           LED driver chips accessed via the I2C bus.  Supported
           devices include PCA9550, PCA9551, PCA9552, and PCA9553.
 
+config LEDS_WM831X_STATUS
+        tristate "LED support for status LEDs on WM831x PMICs"
+        depends on LEDS_CLASS && MFD_WM831X
+        help
+          This option enables support for the status LEDs of the WM831x
+          series of PMICs.
+
 config LEDS_WM8350
         tristate "LED Support for WM8350 AudioPlus PMIC"
         depends on LEDS_CLASS && MFD_WM8350