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[fdt] Add fdt_cells() to read cell-based properties such as "reg"

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Add fdt_cells() to read scalar values encoded within a cell array,
reimplement fdt_u64() as a wrapper around this, and add fdt_u32() for
completeness.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-04-15 20:14:03 +01:00
parent 2c406ec0b1
commit 99322fd3b3
3 changed files with 140 additions and 51 deletions
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5
src/include/ipxe/fdt.h
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@@ -137,8 +137,13 @@ extern const char * fdt_strings ( struct fdt *fdt, unsigned int offset,
const char *name, unsigned int *count );
extern const char * fdt_string ( struct fdt *fdt, unsigned int offset,
const char *name );
extern int fdt_cells ( struct fdt *fdt, unsigned int offset, const char *name,
unsigned int index, unsigned int count,
uint64_t *value );
extern int fdt_u64 ( struct fdt *fdt, unsigned int offset, const char *name,
uint64_t *value );
extern int fdt_u32 ( struct fdt *fdt, unsigned int offset, const char *name,
uint32_t *value );
extern int fdt_mac ( struct fdt *fdt, unsigned int offset,
struct net_device *netdev );
extern int fdt_parse ( struct fdt *fdt, struct fdt_header *hdr,