[PATCH] [v2] of: add more dummy helper functions

From: Arnd Bergmann
Date: Wed Jan 08 2020 - 08:49:46 EST


The new phy-j721e-wiz driver causes a link failure without CONFIG_OF:

drivers/phy/ti/phy-j721e-wiz.o: In function `wiz_remove':
phy-j721e-wiz.c:(.text+0x40): undefined reference to `of_platform_device_destroy'

Add a dummy version of of_platform_device_destroy to avoid having to add
Kconfig dependencies for the driver. As there are a few other functions
without dummy implementations, add those as well for completeness.

Fixes: 42440de5438a ("phy: ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
include/linux/of_platform.h | 39 ++++++++++++++++++++++++++++---------
1 file changed, 30 insertions(+), 9 deletions(-)

diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index 84a966623e78..f5dea3de4856 100644
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -48,28 +48,49 @@ struct of_dev_auxdata {

extern const struct of_device_id of_default_bus_match_table[];

+#ifdef CONFIG_OF
/* Platform drivers register/unregister */
extern struct platform_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent);
-#ifdef CONFIG_OF
extern struct platform_device *of_find_device_by_node(struct device_node *np);
-#else
-static inline struct platform_device *of_find_device_by_node(struct device_node *np)
-{
- return NULL;
-}
-#endif
-
/* Platform devices and busses creation */
extern struct platform_device *of_platform_device_create(struct device_node *np,
const char *bus_id,
struct device *parent);
-
extern int of_platform_device_destroy(struct device *dev, void *data);
extern int of_platform_bus_probe(struct device_node *root,
const struct of_device_id *matches,
struct device *parent);
+#else
+static inline struct platform_device *of_device_alloc(struct device_node *np,
+ const char *bus_id,
+ struct device *parent)
+{
+ return NULL;
+}
+static inline struct platform_device *of_find_device_by_node(struct device_node *np)
+{
+ return NULL;
+}
+static inline struct platform_device *of_platform_device_create(struct device_node *np,
+ const char *bus_id,
+ struct device *parent)
+{
+ return NULL;
+}
+static inline int of_platform_device_destroy(struct device *dev, void *data)
+{
+ return 0;
+}
+static inline int of_platform_bus_probe(struct device_node *root,
+ const struct of_device_id *matches,
+ struct device *parent)
+{
+ return -ENODEV;
+}
+#endif
+
#ifdef CONFIG_OF_ADDRESS
extern int of_platform_populate(struct device_node *root,
const struct of_device_id *matches,
--
2.20.0