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dm: core: Add ofnode_read_prop()

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Add a new function to read a property that supports reading the length as
well.

Reimplement ofnode_read_string() using it and fix its comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2020-01-27 08:49:44 -07:00
parent 14ca9f7f5a
commit a8167d8ee2
3 changed files with 62 additions and 8 deletions
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26
test/dm/ofnode.c
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@@ -59,6 +59,32 @@ static int dm_test_ofnode_fmap(struct unit_test_state *uts)
}
DM_TEST(dm_test_ofnode_fmap, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
static int dm_test_ofnode_read(struct unit_test_state *uts)
{
const u32 *val;
ofnode node;
int size;
node = ofnode_path("/a-test");
ut_assert(ofnode_valid(node));
val = ofnode_read_prop(node, "int-value", &size);
ut_assertnonnull(val);
ut_asserteq(4, size);
ut_asserteq(1234, fdt32_to_cpu(val[0]));
val = ofnode_read_prop(node, "missing", &size);
ut_assertnull(val);
ut_asserteq(-FDT_ERR_NOTFOUND, size);
/* Check it works without a size parameter */
val = ofnode_read_prop(node, "missing", NULL);
ut_assertnull(val);
return 0;
}
DM_TEST(dm_test_ofnode_read, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
static int dm_test_ofnode_read_chosen(struct unit_test_state *uts)
{
const char *str;