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of: Support const and non-const use for to_of_node()

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Turn to_of_node() into a macro in order to support both const and
non-const use. Additionally make the fwnode argument to is_of_node() const
as well.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Sakari Ailus 2017-05-24 17:53:55 +03:00 committed by Rob Herring
parent debd3a3b27
commit d20dc1493d
1 changed files with 12 additions and 8 deletions
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20
include/linux/of.h
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@ -148,16 +148,20 @@ extern raw_spinlock_t devtree_lock;
#ifdef CONFIG_OF
void of_core_init(void);
static inline bool is_of_node(struct fwnode_handle *fwnode)
static inline bool is_of_node(const struct fwnode_handle *fwnode)
{
return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_OF;
}
static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
{
return is_of_node(fwnode) ?
container_of(fwnode, struct device_node, fwnode) : NULL;
}
#define to_of_node(__fwnode) \
({ \
typeof(__fwnode) __to_of_node_fwnode = (__fwnode); \
\
is_of_node(__to_of_node_fwnode) ? \
container_of(__to_of_node_fwnode, \
struct device_node, fwnode) : \
NULL; \
})
#define of_fwnode_handle(node) \
({ \
@ -539,12 +543,12 @@ static inline void of_core_init(void)
{
}
static inline bool is_of_node(struct fwnode_handle *fwnode)
static inline bool is_of_node(const struct fwnode_handle *fwnode)
{
return false;
}
static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode)
{
return NULL;
}