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Add some runtime test cases for the library of device tree parsing functions. v2: - Add testcase for phandle with 0 args - Don't run testcases if testcase data isn't present in device tree Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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/ { | ||
testcase-data { | ||
phandle-tests { | ||
provider0: provider0 { | ||
#phandle-cells = <0>; | ||
}; | ||
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provider1: provider1 { | ||
#phandle-cells = <1>; | ||
}; | ||
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provider2: provider2 { | ||
#phandle-cells = <2>; | ||
}; | ||
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provider3: provider3 { | ||
#phandle-cells = <3>; | ||
}; | ||
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consumer-a { | ||
phandle-list = <&provider1 1>, | ||
<&provider2 2 0>, | ||
<0>, | ||
<&provider3 4 4 3>, | ||
<&provider2 5 100>, | ||
<&provider0>, | ||
<&provider1 7>; | ||
phandle-list-names = "first", "second", "third"; | ||
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phandle-list-bad-phandle = <12345678 0 0>; | ||
phandle-list-bad-args = <&provider2 1 0>, | ||
<&provider3 0>; | ||
}; | ||
}; | ||
}; | ||
}; |
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/include/ "tests-phandle.dtsi" |
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@@ -46,3 +46,5 @@ | |
}; | ||
}; | ||
}; | ||
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/include/ "testcases/tests.dtsi" |
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/* | ||
* Self tests for device tree subsystem | ||
*/ | ||
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#define pr_fmt(fmt) "### %s(): " fmt, __func__ | ||
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#include <linux/clk.h> | ||
#include <linux/err.h> | ||
#include <linux/errno.h> | ||
#include <linux/module.h> | ||
#include <linux/of.h> | ||
#include <linux/list.h> | ||
#include <linux/mutex.h> | ||
#include <linux/slab.h> | ||
#include <linux/device.h> | ||
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static bool selftest_passed = true; | ||
#define selftest(result, fmt, ...) { \ | ||
selftest_passed &= (result); \ | ||
if (!(result)) \ | ||
pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \ | ||
} | ||
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static void __init of_selftest_parse_phandle_with_args(void) | ||
{ | ||
struct device_node *np; | ||
struct of_phandle_args args; | ||
int rc, i; | ||
bool passed_all = true; | ||
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pr_info("start\n"); | ||
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); | ||
if (!np) { | ||
pr_err("missing testcase data\n"); | ||
return; | ||
} | ||
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for (i = 0; i < 7; i++) { | ||
bool passed = true; | ||
rc = of_parse_phandle_with_args(np, "phandle-list", | ||
"#phandle-cells", i, &args); | ||
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/* Test the values from tests-phandle.dtsi */ | ||
switch (i) { | ||
case 0: | ||
passed &= !rc; | ||
passed &= (args.args_count == 1); | ||
passed &= (args.args[0] == (i + 1)); | ||
break; | ||
case 1: | ||
passed &= !rc; | ||
passed &= (args.args_count == 2); | ||
passed &= (args.args[0] == (i + 1)); | ||
passed &= (args.args[1] == 0); | ||
break; | ||
case 2: | ||
passed &= (rc == -ENOENT); | ||
break; | ||
case 3: | ||
passed &= !rc; | ||
passed &= (args.args_count == 3); | ||
passed &= (args.args[0] == (i + 1)); | ||
passed &= (args.args[1] == 4); | ||
passed &= (args.args[2] == 3); | ||
break; | ||
case 4: | ||
passed &= !rc; | ||
passed &= (args.args_count == 2); | ||
passed &= (args.args[0] == (i + 1)); | ||
passed &= (args.args[1] == 100); | ||
break; | ||
case 5: | ||
passed &= !rc; | ||
passed &= (args.args_count == 0); | ||
break; | ||
case 6: | ||
passed &= !rc; | ||
passed &= (args.args_count == 1); | ||
passed &= (args.args[0] == (i + 1)); | ||
break; | ||
case 7: | ||
passed &= (rc == -EINVAL); | ||
break; | ||
default: | ||
passed = false; | ||
} | ||
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if (!passed) { | ||
int j; | ||
pr_err("index %i - data error on node %s rc=%i regs=[", | ||
i, args.np->full_name, rc); | ||
for (j = 0; j < args.args_count; j++) | ||
printk(" %i", args.args[j]); | ||
printk(" ]\n"); | ||
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passed_all = false; | ||
} | ||
} | ||
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/* Check for missing list property */ | ||
rc = of_parse_phandle_with_args(np, "phandle-list-missing", | ||
"#phandle-cells", 0, &args); | ||
passed_all &= (rc == -EINVAL); | ||
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/* Check for missing cells property */ | ||
rc = of_parse_phandle_with_args(np, "phandle-list", | ||
"#phandle-cells-missing", 0, &args); | ||
passed_all &= (rc == -EINVAL); | ||
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/* Check for bad phandle in list */ | ||
rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", | ||
"#phandle-cells", 0, &args); | ||
passed_all &= (rc == -EINVAL); | ||
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/* Check for incorrectly formed argument list */ | ||
rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", | ||
"#phandle-cells", 1, &args); | ||
passed_all &= (rc == -EINVAL); | ||
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pr_info("end - %s\n", passed_all ? "PASS" : "FAIL"); | ||
} | ||
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static int __init of_selftest(void) | ||
{ | ||
struct device_node *np; | ||
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); | ||
if (!np) { | ||
pr_info("No testcase data in device tree; not running tests\n"); | ||
return 0; | ||
} | ||
of_node_put(np); | ||
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pr_info("start of selftest - you will see error messages\n"); | ||
of_selftest_parse_phandle_with_args(); | ||
pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL"); | ||
return 0; | ||
} | ||
late_initcall(of_selftest); |