Commit 28c5d4e4 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Geert Uytterhoeven
Browse files

of: Add for_each_reserved_child_of_node() 



We would like to use for_each loop for status = "reserved" nodes.
Add for_each_reserved_child_of_node() for it.

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: default avatarYusuke Goda <yusuke.goda.sx@renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/87a5pegfau.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
parent 8918283a

drivers/of/base.c

+29 −0
Original line number Diff line number Diff line
@@ -465,6 +465,20 @@ static bool __of_device_is_available(const struct device_node *device) 
		__of_device_is_status(device, ok);

}



/**

 *  __of_device_is_reserved - check if a device is reserved

 *

 *  @device: Node to check for availability, with locks already held

 *

 *  Return: True if the status property is set to "reserved", false otherwise

 */

static bool __of_device_is_reserved(const struct device_node *device)

{

	static const char * const reserved[] = {"reserved", NULL};



	return __of_device_is_status(device, reserved);

}



/**

 *  of_device_is_available - check if a device is available for use

 *
@@ -650,6 +664,21 @@ struct device_node *of_get_next_available_child(const struct device_node *node, 
}

EXPORT_SYMBOL(of_get_next_available_child);



/**

 * of_get_next_reserved_child - Find the next reserved child node

 * @node:	parent node

 * @prev:	previous child of the parent node, or NULL to get first

 *

 * This function is like of_get_next_child(), except that it

 * automatically skips any disabled nodes (i.e. status = "disabled").

 */

struct device_node *of_get_next_reserved_child(const struct device_node *node,

						struct device_node *prev)

{

	return of_get_next_status_child(node, prev, __of_device_is_reserved);

}

EXPORT_SYMBOL(of_get_next_reserved_child);



/**

 * of_get_next_cpu_node - Iterate on cpu nodes

 * @prev:	previous child of the /cpus node, or NULL to get first

include/linux/of.h

+11 −0
Original line number Diff line number Diff line
@@ -294,6 +294,8 @@ extern struct device_node *of_get_next_child(const struct device_node *node, 
					     struct device_node *prev);

extern struct device_node *of_get_next_available_child(

	const struct device_node *node, struct device_node *prev);

extern struct device_node *of_get_next_reserved_child(

	const struct device_node *node, struct device_node *prev);



extern struct device_node *of_get_compatible_child(const struct device_node *parent,

					const char *compatible);
@@ -541,6 +543,12 @@ static inline struct device_node *of_get_next_available_child( 
	return NULL;

}



static inline struct device_node *of_get_next_reserved_child(

	const struct device_node *node, struct device_node *prev)

{

	return NULL;

}



static inline struct device_node *of_find_node_with_property(

	struct device_node *from, const char *prop_name)

{
@@ -1431,6 +1439,9 @@ static inline int of_property_read_s32(const struct device_node *np, 
#define for_each_available_child_of_node(parent, child) \

	for (child = of_get_next_available_child(parent, NULL); child != NULL; \

	     child = of_get_next_available_child(parent, child))

#define for_each_reserved_child_of_node(parent, child)			\

	for (child = of_get_next_reserved_child(parent, NULL); child != NULL; \

	     child = of_get_next_reserved_child(parent, child))



#define for_each_of_cpu_node(cpu) \

	for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \