Commit 1f42e5dd authored by Grant Likely's avatar Grant Likely
Browse files

of: Add self test for of_match_node() 



Adds a selftest function for the of_match_node function. of_match_node
is supposed to handle precedence for the compatible property as well as
the name and device_type values. This patch adds some test case data and
a function that makes sure each test node matches against the correct
entry of an of_device_id table.

This code was written to verify the new of_match_node() implementation
that is an earlier part of this series.

Signed-off-by: default avatarGrant Likely <grant.likely@linaro.org>
Cc: Kevin Hao <haokexin@gmail.com>
parent b5190516

drivers/of/selftest.c

+67 −0
Original line number Diff line number Diff line
@@ -300,6 +300,72 @@ static void __init of_selftest_parse_interrupts_extended(void) 
	of_node_put(np);

}



static struct of_device_id match_node_table[] = {

	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */

	{ .data = "B", .type = "type1", }, /* followed by type alone */



	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */

	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */

	{ .data = "Cc", .name = "name2", .type = "type2", },



	{ .data = "E", .compatible = "compat3" },

	{ .data = "G", .compatible = "compat2", },

	{ .data = "H", .compatible = "compat2", .name = "name5", },

	{ .data = "I", .compatible = "compat2", .type = "type1", },

	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },

	{ .data = "K", .compatible = "compat2", .name = "name9", },

	{}

};



static struct {

	const char *path;

	const char *data;

} match_node_tests[] = {

	{ .path = "/testcase-data/match-node/name0", .data = "A", },

	{ .path = "/testcase-data/match-node/name1", .data = "B", },

	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },

	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },

	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },

	{ .path = "/testcase-data/match-node/name3", .data = "E", },

	{ .path = "/testcase-data/match-node/name4", .data = "G", },

	{ .path = "/testcase-data/match-node/name5", .data = "H", },

	{ .path = "/testcase-data/match-node/name6", .data = "G", },

	{ .path = "/testcase-data/match-node/name7", .data = "I", },

	{ .path = "/testcase-data/match-node/name8", .data = "J", },

	{ .path = "/testcase-data/match-node/name9", .data = "K", },

};



static void __init of_selftest_match_node(void)

{

	struct device_node *np;

	const struct of_device_id *match;

	int i;



	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {

		np = of_find_node_by_path(match_node_tests[i].path);

		if (!np) {

			selftest(0, "missing testcase node %s\n",

				match_node_tests[i].path);

			continue;

		}



		match = of_match_node(match_node_table, np);

		if (!match) {

			selftest(0, "%s didn't match anything\n",

				match_node_tests[i].path);

			continue;

		}



		if (strcmp(match->data, match_node_tests[i].data) != 0) {

			selftest(0, "%s got wrong match. expected %s, got %s\n",

				match_node_tests[i].path, match_node_tests[i].data,

				(const char *)match->data);

			continue;

		}

		selftest(1, "passed");

	}

}



static int __init of_selftest(void)

{

	struct device_node *np;
@@ -316,6 +382,7 @@ static int __init of_selftest(void) 
	of_selftest_property_match_string();

	of_selftest_parse_interrupts();

	of_selftest_parse_interrupts_extended();

	of_selftest_match_node();

	pr_info("end of selftest - %i passed, %i failed\n",

		selftest_results.passed, selftest_results.failed);

	return 0;

drivers/of/testcase-data/testcases.dtsi

+1 −0
Original line number Diff line number Diff line 
#include "tests-phandle.dtsi"

#include "tests-interrupts.dtsi"

#include "tests-match.dtsi"

drivers/of/testcase-data/tests-match.dtsi

0 → 100644
+19 −0
Original line number Diff line number Diff line 


/ {

	testcase-data {

		match-node {

			name0 { };

			name1 { device_type = "type1"; };

			a { name2 { device_type = "type1"; }; };

			b { name2 { }; };

			c { name2 { device_type = "type2"; }; };

			name3 { compatible = "compat3"; };

			name4 { compatible = "compat2", "compat3"; };

			name5 { compatible = "compat2", "compat3"; };

			name6 { compatible = "compat1", "compat2", "compat3"; };

			name7 { compatible = "compat2"; device_type = "type1"; };

			name8 { compatible = "compat2"; device_type = "type1"; };

			name9 { compatible = "compat2"; };

		};

	};

};

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