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authorGrant Likely <grant.likely@linaro.org>2013-11-15 18:19:09 +0100
committerGrant Likely <grant.likely@linaro.org>2014-03-11 21:48:29 +0100
commit7e66c5c74f7348a96d5a3671f8cda4a478242679 (patch)
tree23ec3fb3c8643d65e17aba709991f6677c3e6421 /drivers/of/selftest.c
parentof: Make device nodes kobjects so they show up in sysfs (diff)
downloadlinux-7e66c5c74f7348a96d5a3671f8cda4a478242679.tar.xz
linux-7e66c5c74f7348a96d5a3671f8cda4a478242679.zip
of/selftest: Add self tests for manipulation of properties
Adds a few simple test cases to ensure that addition, update and removal of device tree node properties works correctly. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David S. Miller <davem@davemloft.net> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Diffstat (limited to 'drivers/of/selftest.c')
-rw-r--r--drivers/of/selftest.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c
index 6643d1920985..ae4450070503 100644
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -30,6 +30,67 @@ static struct selftest_results {
} \
}
+static void __init of_selftest_dynamic(void)
+{
+ struct device_node *np;
+ struct property *prop;
+
+ np = of_find_node_by_path("/testcase-data");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ /* Array of 4 properties for the purpose of testing */
+ prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
+ if (!prop) {
+ selftest(0, "kzalloc() failed\n");
+ return;
+ }
+
+ /* Add a new property - should pass*/
+ prop->name = "new-property";
+ prop->value = "new-property-data";
+ prop->length = strlen(prop->value);
+ selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
+
+ /* Try to add an existing property - should fail */
+ prop++;
+ prop->name = "new-property";
+ prop->value = "new-property-data-should-fail";
+ prop->length = strlen(prop->value);
+ selftest(of_add_property(np, prop) != 0,
+ "Adding an existing property should have failed\n");
+
+ /* Try to modify an existing property - should pass */
+ prop->value = "modify-property-data-should-pass";
+ prop->length = strlen(prop->value);
+ selftest(of_update_property(np, prop) == 0,
+ "Updating an existing property should have passed\n");
+
+ /* Try to modify non-existent property - should pass*/
+ prop++;
+ prop->name = "modify-property";
+ prop->value = "modify-missing-property-data-should-pass";
+ prop->length = strlen(prop->value);
+ selftest(of_update_property(np, prop) == 0,
+ "Updating a missing property should have passed\n");
+
+ /* Remove property - should pass */
+ selftest(of_remove_property(np, prop) == 0,
+ "Removing a property should have passed\n");
+
+ /* Adding very large property - should pass */
+ prop++;
+ prop->name = "large-property-PAGE_SIZEx8";
+ prop->length = PAGE_SIZE * 8;
+ prop->value = kzalloc(prop->length, GFP_KERNEL);
+ selftest(prop->value != NULL, "Unable to allocate large buffer\n");
+ if (prop->value)
+ selftest(of_add_property(np, prop) == 0,
+ "Adding a large property should have passed\n");
+}
+
static void __init of_selftest_parse_phandle_with_args(void)
{
struct device_node *np;
@@ -378,6 +439,7 @@ static int __init of_selftest(void)
of_node_put(np);
pr_info("start of selftest - you will see error messages\n");
+ of_selftest_dynamic();
of_selftest_parse_phandle_with_args();
of_selftest_property_match_string();
of_selftest_parse_interrupts();