mfd: Add initial WM8958 support

The WM8958 is a derivative of the WM8994 which is register compatible
with the addition of some extra features, mostly in the CODEC side.
The major change visible at the MFD level is that rather than a single
DBVDD supply we now have three separate DBVDDs so we must request and
enable a different set of supplies.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/mfd/wm8994/core.h b/include/linux/mfd/wm8994/core.h
index de79baee4925..3fd36845ca45 100644
--- a/include/linux/mfd/wm8994/core.h
+++ b/include/linux/mfd/wm8994/core.h
@@ -17,6 +17,11 @@
 
 #include <linux/interrupt.h>
 
+enum wm8994_type {
+        WM8994 = 0,
+        WM8958 = 1,
+};
+
 struct regulator_dev;
 struct regulator_bulk_data;
 
@@ -48,6 +53,8 @@ struct wm8994 {
         struct mutex io_lock;
         struct mutex irq_lock;
 
+        enum wm8994_type type;
+
         struct device *dev;
         int (*read_dev)(struct wm8994 *wm8994, unsigned short reg,
                         int bytes, void *dest);
@@ -68,6 +75,7 @@ struct wm8994 {
         u16 gpio_regs[WM8994_NUM_GPIO_REGS];
 
         struct regulator_dev *dbvdd;
+        int num_supplies;
         struct regulator_bulk_data *supplies;
 };