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Commit abdaa77b authored by Joerg Roedel's avatar Joerg Roedel Committed by Rob Herring
Browse files

of: Introduce of_phandle_iterator_args() 



This helper function can be used to copy the arguments of a
phandle to an array.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent f623ce95

drivers/of/base.c

+23 −6
Original line number Diff line number Diff line
@@ -1534,6 +1534,23 @@ int of_phandle_iterator_next(struct of_phandle_iterator *it) 
	return -EINVAL;

}



int of_phandle_iterator_args(struct of_phandle_iterator *it,

			     uint32_t *args,

			     int size)

{

	int i, count;



	count = it->cur_count;



	if (WARN_ON(size < count))

		count = size;



	for (i = 0; i < count; i++)

		args[i] = be32_to_cpup(it->cur++);



	return count;

}



static int __of_parse_phandle_with_args(const struct device_node *np,

					const char *list_name,

					const char *cells_name,
@@ -1557,13 +1574,13 @@ static int __of_parse_phandle_with_args(const struct device_node *np, 
				goto err;



			if (out_args) {

				int i;

				if (WARN_ON(it.cur_count > MAX_PHANDLE_ARGS))

					it.cur_count = MAX_PHANDLE_ARGS;

				int c;



				c = of_phandle_iterator_args(&it,

							     out_args->args,

							     MAX_PHANDLE_ARGS);

				out_args->np = it.node;

				out_args->args_count = it.cur_count;

				for (i = 0; i < it.cur_count; i++)

					out_args->args[i] = be32_to_cpup(it.cur++);

				out_args->args_count = c;

			} else {

				of_node_put(it.node);

			}

include/linux/of.h

+10 −0
Original line number Diff line number Diff line
@@ -359,6 +359,9 @@ extern int of_phandle_iterator_init(struct of_phandle_iterator *it, 
				    int cell_count);



extern int of_phandle_iterator_next(struct of_phandle_iterator *it);

extern int of_phandle_iterator_args(struct of_phandle_iterator *it,

				    uint32_t *args,

				    int size);



extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));

extern int of_alias_get_id(struct device_node *np, const char *stem);
@@ -648,6 +651,13 @@ static inline int of_phandle_iterator_next(struct of_phandle_iterator *it) 
	return -ENOSYS;

}



static inline int of_phandle_iterator_args(struct of_phandle_iterator *it,

					   uint32_t *args,

					   int size)

{

	return 0;

}



static inline int of_alias_get_id(struct device_node *np, const char *stem)

{

	return -ENOSYS;