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Commit 183f1d0c authored by Dong Aisheng's avatar Dong Aisheng Committed by Linus Walleij
Browse files

dt: add of_get_child_count helper function 



Currently most code to get child count in kernel are almost same,
add a helper to implement this function for dt to use.

Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarRob Herring <rob.herring@calxeda.com>
Acked-by: default avatarStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: default avatarDong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4650b7cb

include/linux/of.h

+16 −0
Original line number Diff line number Diff line
@@ -193,6 +193,17 @@ extern struct device_node *of_get_next_child(const struct device_node *node, 
	for (child = of_get_next_child(parent, NULL); child != NULL; \

	     child = of_get_next_child(parent, child))



static inline int of_get_child_count(const struct device_node *np)

{

	struct device_node *child;

	int num = 0;



	for_each_child_of_node(np, child)

		num++;



	return num;

}



extern struct device_node *of_find_node_with_property(

	struct device_node *from, const char *prop_name);

#define for_each_node_with_property(dn, prop_name) \
@@ -300,6 +311,11 @@ static inline bool of_have_populated_dt(void) 
#define for_each_child_of_node(parent, child) \

	while (0)



static inline int of_get_child_count(const struct device_node *np)

{

	return 0;

}



static inline int of_device_is_compatible(const struct device_node *device,

					  const char *name)

{