mfd: Add initialisation callback for WM8350

Some functions of the WM8350 require board-specific initialisation on
startup. Provide a callback to the WM8350 driver in platform data
for platforms to use to configure the chip.  Use of a callback allows
platforms to control the ordering of initialisation which can be
important.

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

1 files changed, 13 insertions, 1 deletions

diff --git a/include/linux/mfd/wm8350/core.h b/include/linux/mfd/wm8350/core.h
index 94778c1669dc..8f2beae6278e 100644
--- a/include/linux/mfd/wm8350/core.h
+++ b/include/linux/mfd/wm8350/core.h
@@ -564,10 +564,22 @@ struct wm8350 {
         u16 *reg_cache;
 };
 
+/**
+ * Data to be supplied by the platform to initialise the WM8350.
+ *
+ * @init: Function called during driver initialisation.  Should be
+ *        used by the platform to configure GPIO functions and similar.
+ */
+struct wm8350_platform_data {
+        int (*init)(struct wm8350 *wm8350);
+};
+
+
 /*
  * WM8350 device initialisation and exit.
  */
-int wm8350_device_init(struct wm8350 *wm8350);
+int wm8350_device_init(struct wm8350 *wm8350,
+                       struct wm8350_platform_data *pdata);
 void wm8350_device_exit(struct wm8350 *wm8350);
 
 /*