mfd: Add platform data to support multiple WM831x devices per board

If a system contains multiple WM831x devices we need to pass a device
number through to the MFD so that we use unique device IDs when we
instantiate child devices. In order to get support for this into 2.6.39
add some platform data to support the configuration, but no implementation
as yet.

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

diff --git a/include/linux/mfd/wm831x/pdata.h b/include/linux/mfd/wm831x/pdata.h
index ac3aa73943e70b2d36f298d696542cbb249b1bb7..afe4db49402d142036761855cd9c9b6714bfec8d 100644 (file)
--- a/include/linux/mfd/wm831x/pdata.h
+++ b/include/linux/mfd/wm831x/pdata.h
@@ -104,6 +104,9 @@ struct wm831x_watchdog_pdata {
 #define WM831X_MAX_ISINK  2
 
 struct wm831x_pdata {
+       /** Used to distinguish multiple WM831x chips */
+       int wm831x_num;
+
        /** Called before subdevices are set up */
        int (*pre_init)(struct wm831x *wm831x);
        /** Called after subdevices are set up */