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[fdt] Use phandle as device location

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Consumption of phandles will be in the form of locating a functional
device (e.g. a GPIO device, or an I2C device, or a reset controller)
by phandle, rather than locating the device tree node to which the
phandle refers.

Repurpose fdt_phandle() to obtain the phandle value (instead of
searching by phandle), and record this value as the bus location
within the generic device structure.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-08-04 14:52:00 +01:00
parent f7a1e9ef8e
commit 5f10b74555
4 changed files with 34 additions and 62 deletions
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3
src/include/ipxe/fdt.h
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@@ -176,8 +176,6 @@ extern int fdt_path ( struct fdt *fdt, const char *path,
unsigned int *offset );
extern int fdt_alias ( struct fdt *fdt, const char *name,
unsigned int *offset );
extern int fdt_phandle ( struct fdt *fdt, uint32_t phandle,
unsigned int *offset );
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,
@@ -189,6 +187,7 @@ 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 uint32_t fdt_phandle ( struct fdt *fdt, unsigned int offset );
extern void fdt_reg_cells ( struct fdt *fdt, unsigned int offset,
struct fdt_reg_cells *regs );
extern int fdt_reg_count ( struct fdt *fdt, unsigned int offset,