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>

2 files changed, 12 insertions, 2 deletions

diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index c7552c0b7797..071834ba6954 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -388,7 +388,8 @@ out:
 }
 EXPORT_SYMBOL_GPL(wm8350_create_cache);
 
-int wm8350_device_init(struct wm8350 *wm8350)
+int wm8350_device_init(struct wm8350 *wm8350,
+                       struct wm8350_platform_data *pdata)
 {
         int ret = -EINVAL;
         u16 id1, id2, mask, mode;
@@ -439,6 +440,15 @@ int wm8350_device_init(struct wm8350 *wm8350)
                 return ret;
         }
 
+        if (pdata->init) {
+                ret = pdata->init(wm8350);
+                if (ret != 0) {
+                        dev_err(wm8350->dev, "Platform init() failed: %d\n",
+                                ret);
+                        goto err;
+                }
+        }
+
         return 0;
 
 err:
diff --git a/drivers/mfd/wm8350-i2c.c b/drivers/mfd/wm8350-i2c.c
index 2b0569cf9512..245b790961aa 100644
--- a/drivers/mfd/wm8350-i2c.c
+++ b/drivers/mfd/wm8350-i2c.c
@@ -65,7 +65,7 @@ static int wm8350_i2c_probe(struct i2c_client *i2c,
         wm8350->read_dev = wm8350_i2c_read_device;
         wm8350->write_dev = wm8350_i2c_write_device;
 
-        ret = wm8350_device_init(wm8350);
+        ret = wm8350_device_init(wm8350, i2c->dev.platform_data);
         if (ret < 0)
                 goto err;