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fdt_support: Add helper function to read "ranges" property

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This patch adds a helper function that can be used to interpret most
"ranges" properties in the device tree.

It reads the n'th range out of a "ranges" array and returns the node's
virtual address of the range, the physical address that range starts at
and the size of the range.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Alexander Graf 2014-04-11 17:09:41 +02:00 • committed by York Sun
parent 94fb182cdf
commit c48e686889
2 changed files with 96 additions and 0 deletions
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2
include/fdt_support.h
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@ -87,6 +87,8 @@ int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
u64 addr);
u64 fdt_get_base_address(void *fdt, int node);
int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
uint64_t *addr, uint64_t *len);
enum fdt_status {
FDT_STATUS_OKAY,