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[fdt] Add ability to locate node by phandle

Browse Source 
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-07-22 13:37:05 +01:00
parent e01e5ff7c6
commit fb082bd4cd
3 changed files with 133 additions and 67 deletions
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147
src/tests/fdt_test.c
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@@ -39,10 +39,10 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** Simplified QEMU sifive_u device tree blob */
static const uint8_t sifive_u[] = {
0xd0, 0x0d, 0xfe, 0xed, 0x00, 0x00, 0x05, 0x61, 0x00, 0x00, 0x00, 0x38,
0x00, 0x00, 0x04, 0x7c, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x11,
0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe5,
0x00, 0x00, 0x04, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xd0, 0x0d, 0xfe, 0xed, 0x00, 0x00, 0x05, 0x8f, 0x00, 0x00, 0x00, 0x38,
0x00, 0x00, 0x04, 0x9c, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x11,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
@@ -90,70 +90,74 @@ static const uint8_t sifive_u[] = {
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};
/**
@@ -257,6 +261,15 @@ static void fdt_test_exec ( void ) {
ok ( ( string = fdt_string ( &fdt, offset, "phy-mode" ) ) != NULL );
ok ( strcmp ( string, "gmii" ) == 0 );
/* Verify phandle lookup */
ok ( fdt_phandle ( &fdt, 0x03, &offset ) == 0 );
ok ( fdt_describe ( &fdt, offset, &desc ) == 0 );
ok ( strcmp ( desc.name, "interrupt-controller" ) == 0 );
ok ( fdt_phandle ( &fdt, 0x08, &offset ) == 0 );
ok ( fdt_describe ( &fdt, offset, &desc ) == 0 );
ok ( strcmp ( desc.name, "ethernet-phy@0" ) == 0 );
ok ( fdt_phandle ( &fdt, 0x2a, &offset ) != 0 );
/* Verify node description */
ok ( fdt_path ( &fdt, "/memory@80000000", &offset ) == 0 );
ok ( fdt_describe ( &fdt, offset, &desc ) == 0 );