devicetree: Add empty of_platform_populate() for !CONFIG_OF_ADDRESS (sparc)

Sparc has its own helpers for translating address ranges when the device
tree is parsed at boot time, and it isn't able to use of_platform_populate().
However, there are some device drivers that want to use that function on
other DT enabled platforms (ie. TWL4030).  This patch adds an empty
of_platform_populate() implementation that returns an error when
CONFIG_OF_ADDRESS is not selected.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>

3 files changed, 14 insertions, 7 deletions

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 66f9bffc50f0..4970d43952db 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -1305,11 +1305,10 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
         }
 
-#ifdef CONFIG_OF_DEVICE
+        status = -ENODEV;
         if (node)
                 status = of_platform_populate(node, NULL, NULL, &client->dev);
-        else
-#endif
+        if (status)
                 status = add_children(pdata, id->driver_data);
 
 fail:
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 63b3ec48c203..20fbebd49db3 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -55,7 +55,7 @@ EXPORT_SYMBOL(of_find_device_by_node);
 #include <asm/dcr.h>
 #endif
 
-#if !defined(CONFIG_SPARC)
+#ifdef CONFIG_OF_ADDRESS
 /*
  * The following routines scan a subtree and registers a device for
  * each applicable node.
@@ -462,4 +462,4 @@ int of_platform_populate(struct device_node *root,
         of_node_put(root);
         return rc;
 }
-#endif /* !CONFIG_SPARC */
+#endif /* CONFIG_OF_ADDRESS */
diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index 040ce2f6e8de..242fa3563e2e 100644
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -81,7 +81,7 @@ extern struct platform_device *of_device_alloc(struct device_node *np,
                                          struct device *parent);
 extern struct platform_device *of_find_device_by_node(struct device_node *np);
 
-#if !defined(CONFIG_SPARC) /* SPARC has its own device registration method */
+#ifdef CONFIG_OF_ADDRESS /* device reg helpers depend on OF_ADDRESS */
 /* Platform devices and busses creation */
 extern struct platform_device *of_platform_device_create(struct device_node *np,
                                                    const char *bus_id,
@@ -94,7 +94,15 @@ extern int of_platform_populate(struct device_node *root,
                                 const struct of_device_id *matches,
                                 const struct of_dev_auxdata *lookup,
                                 struct device *parent);
-#endif /* !CONFIG_SPARC */
+#else
+static inline int of_platform_populate(struct device_node *root,
+                                        const struct of_device_id *matches,
+                                        const struct of_dev_auxdata *lookup,
+                                        struct device *parent)
+{
+        return -ENODEV;
+}
+#endif /* !CONFIG_OF_ADDRESS */
 
 #endif /* CONFIG_OF_DEVICE */