From 305d31885f2f35db486594d051d9aa3a4ed201c5 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 28 Jul 2020 12:51:08 +0200 Subject: [PATCH] dm: core: Add support for getting node from aliases Add support for getting a node/property from aliases. The similar functionality is provided for chosen node and this implemenatation is copy of it. Signed-off-by: Michal Simek Reviewed-by: Simon Glass --- drivers/core/ofnode.c | 22 ++++++++++++++++++++++ include/dm/ofnode.h | 22 ++++++++++++++++++++++ test/dm/ofnode.c | 22 ++++++++++++++++++++++ 3 files changed, 66 insertions(+) diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index 7d1b89514c..a68076bf35 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -476,6 +476,28 @@ ofnode ofnode_get_chosen_node(const char *name) return ofnode_path(prop); } +const void *ofnode_read_aliases_prop(const char *propname, int *sizep) +{ + ofnode node; + + node = ofnode_path("/aliases"); + + return ofnode_read_prop(node, propname, sizep); +} + +ofnode ofnode_get_aliases_node(const char *name) +{ + const char *prop; + + prop = ofnode_read_aliases_prop(name, NULL); + if (!prop) + return ofnode_null(); + + debug("%s: node_path: %s\n", __func__, prop); + + return ofnode_path(prop); +} + int ofnode_get_child_count(ofnode parent) { ofnode child; diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index 4b7af37056..ced7f6ffb2 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -605,6 +605,28 @@ const char *ofnode_read_chosen_string(const char *propname); */ ofnode ofnode_get_chosen_node(const char *propname); +/** + * ofnode_read_aliases_prop() - get the value of a aliases property + * + * This looks for a property within the /aliases node and returns its value + * + * @propname: Property name to look for + * @sizep: Returns size of property, or FDT_ERR_... error code if function + * returns NULL + * @return property value if found, else NULL + */ +const void *ofnode_read_aliases_prop(const char *propname, int *sizep); + +/** + * ofnode_get_aliases_node() - get a referenced node from the aliases node + * + * This looks up a named property in the aliases node and uses that as a path to + * look up a code. + * + * @return the referenced node if present, else ofnode_null() + */ +ofnode ofnode_get_aliases_node(const char *propname); + struct display_timing; /** * ofnode_decode_display_timing() - decode display timings diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c index 01ac3c2094..fb1ceb1318 100644 --- a/test/dm/ofnode.c +++ b/test/dm/ofnode.c @@ -207,6 +207,28 @@ static int dm_test_ofnode_read_chosen(struct unit_test_state *uts) } DM_TEST(dm_test_ofnode_read_chosen, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT); +static int dm_test_ofnode_read_aliases(struct unit_test_state *uts) +{ + const void *val; + ofnode node; + int size; + + node = ofnode_get_aliases_node("eth3"); + ut_assert(ofnode_valid(node)); + ut_asserteq_str("sbe5", ofnode_get_name(node)); + + node = ofnode_get_aliases_node("unknown"); + ut_assert(!ofnode_valid(node)); + + val = ofnode_read_aliases_prop("spi0", &size); + ut_assertnonnull(val); + ut_asserteq(7, size); + ut_asserteq_str("/spi@0", (const char *)val); + + return 0; +} +DM_TEST(dm_test_ofnode_read_aliases, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT); + static int dm_test_ofnode_get_child_count(struct unit_test_state *uts) { ofnode node, child_node; -- 2.39.5