mfd: Add initial WM8994 support

The WM8994 is a highly integrated ultra low power audio hub CODEC.
Since it includes on-board regulators and GPIOs it is represented
as a multi-function device, though the overwhelming majority of
the functionality is provided by the ASoC CODEC driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index a760dbefd27a..64fbe3334eb3 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -295,6 +295,18 @@ config MFD_WM8350_I2C
           I2C as the control interface.  Additional options must be
           selected to enable support for the functionality of the chip.
 
+config MFD_WM8994
+        tristate "Support Wolfson Microelectronics WM8994"
+        select MFD_CORE
+        depends on I2C
+        help
+          The WM8994 is a highly integrated hi-fi CODEC designed for
+          smartphone applicatiosn.  As well as audio functionality it
+          has on board GPIO and regulator functionality which is
+          supported via the relevant subsystems.  This driver provides
+          core support for the WM8994, in order to use the actual
+          functionaltiy of the device other drivers must be enabled.
+
 config MFD_PCF50633
         tristate "Support for NXP PCF50633"
         depends on I2C