Add function for retrieving full node path of a given ofnode. This uses np->full_name if OF is live, otherwise a call to fdt_get_path() is made.
Signed-off-by: Marek Behún marek.behun@nic.cz Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Miquel Raynal miquel.raynal@bootlin.com Tested-by: Patrice Chotard patrice.chotard@foss.st.com --- drivers/core/ofnode.c | 25 +++++++++++++++++++++++++ include/dm/ofnode.h | 10 ++++++++++ test/dm/ofnode.c | 21 +++++++++++++++++++++ 3 files changed, 56 insertions(+)
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index dd34cf8ca3..eeeccfb446 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -286,6 +286,31 @@ const char *ofnode_get_name(ofnode node) return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL); }
+int ofnode_get_path(ofnode node, char *buf, int buflen) +{ + assert(ofnode_valid(node)); + + if (ofnode_is_np(node)) { + if (strlen(node.np->full_name) >= buflen) + return -ENOSPC; + + strcpy(buf, node.np->full_name); + + return 0; + } else { + int res; + + res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf, + buflen); + if (!res) + return res; + else if (res == -FDT_ERR_NOSPACE) + return -ENOSPC; + else + return -EINVAL; + } +} + ofnode ofnode_get_by_phandle(uint phandle) { ofnode node; diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index e3fccb506e..3da05d8b21 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -458,6 +458,16 @@ ofnode ofnode_get_parent(ofnode node); */ const char *ofnode_get_name(ofnode node);
+/** + * ofnode_get_path() - get the full path of a node + * + * @node: valid node to look up + * @buf: buffer to write the node path into + * @buflen: buffer size + * @return 0 if OK, -ve on error + */ +int ofnode_get_path(ofnode node, char *buf, int buflen); + /** * ofnode_get_by_phandle() - get ofnode from phandle * diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c index 9a69cf70c1..94a4d2189e 100644 --- a/test/dm/ofnode.c +++ b/test/dm/ofnode.c @@ -297,3 +297,24 @@ static int dm_test_ofnode_get_reg(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_ofnode_get_reg, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT); + +static int dm_test_ofnode_get_path(struct unit_test_state *uts) +{ + const char *path = "/translation-test@8000/noxlatebus@3,300/dev@42"; + char buf[64]; + ofnode node; + int res; + + node = ofnode_path(path); + ut_assert(ofnode_valid(node)); + + res = ofnode_get_path(node, buf, 64); + ut_asserteq(0, res); + ut_asserteq_str(path, buf); + + res = ofnode_get_path(node, buf, 32); + ut_asserteq(-ENOSPC, res); + + return 0; +} +DM_TEST(dm_test_ofnode_get_path, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);