Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: Fetch cell pointer from platform_device->mfd_cell

2 files changed, 16 insertions, 2 deletions

diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index ad1b19aa6508..aef23309a742 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -86,16 +86,25 @@ extern int mfd_clone_cell(const char *cell, const char **clones,
  */
 static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev)
 {
-        return pdev->dev.platform_data;
+        return pdev->mfd_cell;
 }
 
 /*
  * Given a platform device that's been created by mfd_add_devices(), fetch
  * the .mfd_data entry from the mfd_cell that created it.
+ * Otherwise just return the platform_data pointer.
+ * This maintains compatibility with platform drivers whose devices aren't
+ * created by the mfd layer, and expect platform_data to contain what would've
+ * otherwise been in mfd_data.
  */
 static inline void *mfd_get_data(struct platform_device *pdev)
 {
-        return mfd_get_cell(pdev)->mfd_data;
+        const struct mfd_cell *cell = mfd_get_cell(pdev);
+
+        if (cell)
+                return cell->mfd_data;
+        else
+                return pdev->dev.platform_data;
 }
 
 extern int mfd_add_devices(struct device *parent, int id,
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index d96db9825708..744942c95fec 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -14,6 +14,8 @@
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
 
+struct mfd_cell;
+
 struct platform_device {
         const char      * name;
         int             id;
@@ -23,6 +25,9 @@ struct platform_device {
 
         const struct platform_device_id *id_entry;
 
+        /* MFD cell pointer */
+        struct mfd_cell *mfd_cell;
+
         /* arch specific additions */
         struct pdev_archdata    archdata;
 };