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path: root/drivers/of/unittest.c
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Diffstat (limited to 'drivers/of/unittest.c')
-rw-r--r--drivers/of/unittest.c345
1 files changed, 309 insertions, 36 deletions
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 5707c309a754..f1aa09215d4b 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -23,6 +23,7 @@
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
+#include <linux/gpio/driver.h>
#include <linux/bitops.h>
@@ -45,6 +46,103 @@ static struct unittest_results {
failed; \
})
+#ifdef CONFIG_OF_KOBJ
+#define OF_KREF_READ(NODE) kref_read(&(NODE)->kobj.kref)
+#else
+#define OF_KREF_READ(NODE) 1
+#endif
+
+/*
+ * Expected message may have a message level other than KERN_INFO.
+ * Print the expected message only if the current loglevel will allow
+ * the actual message to print.
+ */
+#define EXPECT_BEGIN(level, fmt, ...) \
+ printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__)
+
+#define EXPECT_END(level, fmt, ...) \
+ printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__)
+
+struct unittest_gpio_dev {
+ struct gpio_chip chip;
+};
+
+static int unittest_gpio_chip_request_count;
+static int unittest_gpio_probe_count;
+static int unittest_gpio_probe_pass_count;
+
+static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
+{
+ unittest_gpio_chip_request_count++;
+
+ pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
+ unittest_gpio_chip_request_count);
+ return 0;
+}
+
+static int unittest_gpio_probe(struct platform_device *pdev)
+{
+ struct unittest_gpio_dev *devptr;
+ int ret;
+
+ unittest_gpio_probe_count++;
+
+ devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
+ if (!devptr)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, devptr);
+
+ devptr->chip.of_node = pdev->dev.of_node;
+ devptr->chip.label = "of-unittest-gpio";
+ devptr->chip.base = -1; /* dynamic allocation */
+ devptr->chip.ngpio = 5;
+ devptr->chip.request = unittest_gpio_chip_request;
+
+ ret = gpiochip_add_data(&devptr->chip, NULL);
+
+ unittest(!ret,
+ "gpiochip_add_data() for node @%pOF failed, ret = %d\n", devptr->chip.of_node, ret);
+
+ if (!ret)
+ unittest_gpio_probe_pass_count++;
+ return ret;
+}
+
+static int unittest_gpio_remove(struct platform_device *pdev)
+{
+ struct unittest_gpio_dev *gdev = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+
+ dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
+
+ if (!gdev)
+ return -EINVAL;
+
+ if (gdev->chip.base != -1)
+ gpiochip_remove(&gdev->chip);
+
+ platform_set_drvdata(pdev, NULL);
+ kfree(gdev);
+
+ return 0;
+}
+
+static const struct of_device_id unittest_gpio_id[] = {
+ { .compatible = "unittest-gpio", },
+ {}
+};
+
+static struct platform_driver unittest_gpio_driver = {
+ .probe = unittest_gpio_probe,
+ .remove = unittest_gpio_remove,
+ .driver = {
+ .name = "unittest-gpio",
+ .of_match_table = of_match_ptr(unittest_gpio_id),
+ },
+};
+
static void __init of_unittest_find_node_by_name(void)
{
struct device_node *np;
@@ -52,7 +150,7 @@ static void __init of_unittest_find_node_by_name(void)
np = of_find_node_by_path("/testcase-data");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data", name),
+ unittest(np && name && !strcmp("/testcase-data", name),
"find /testcase-data failed\n");
of_node_put(np);
kfree(name);
@@ -63,14 +161,14 @@ static void __init of_unittest_find_node_by_name(void)
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
+ unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find /testcase-data/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
np = of_find_node_by_path("testcase-alias");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data", name),
+ unittest(np && name && !strcmp("/testcase-data", name),
"find testcase-alias failed\n");
of_node_put(np);
kfree(name);
@@ -81,7 +179,7 @@ static void __init of_unittest_find_node_by_name(void)
np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
+ unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find testcase-alias/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
@@ -430,6 +528,9 @@ static void __init of_unittest_parse_phandle_with_args(void)
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
+
+ if (rc == 0)
+ of_node_put(args.np);
}
/* Check for missing list property */
@@ -471,8 +572,9 @@ static void __init of_unittest_parse_phandle_with_args(void)
static void __init of_unittest_parse_phandle_with_args_map(void)
{
- struct device_node *np, *p0, *p1, *p2, *p3;
+ struct device_node *np, *p[6] = {};
struct of_phandle_args args;
+ unsigned int prefs[6];
int i, rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
@@ -481,34 +583,24 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
return;
}
- p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
- if (!p0) {
- pr_err("missing testcase data\n");
- return;
- }
-
- p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
- if (!p1) {
- pr_err("missing testcase data\n");
- return;
- }
-
- p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
- if (!p2) {
- pr_err("missing testcase data\n");
- return;
- }
-
- p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
- if (!p3) {
- pr_err("missing testcase data\n");
- return;
+ p[0] = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
+ p[1] = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
+ p[2] = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
+ p[3] = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
+ p[4] = of_find_node_by_path("/testcase-data/phandle-tests/provider4");
+ p[5] = of_find_node_by_path("/testcase-data/phandle-tests/provider5");
+ for (i = 0; i < ARRAY_SIZE(p); ++i) {
+ if (!p[i]) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+ prefs[i] = OF_KREF_READ(p[i]);
}
rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
- unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
+ unittest(rc == 8, "of_count_phandle_with_args() returned %i, expected 8\n", rc);
- for (i = 0; i < 8; i++) {
+ for (i = 0; i < 9; i++) {
bool passed = true;
memset(&args, 0, sizeof(args));
@@ -519,13 +611,13 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
switch (i) {
case 0:
passed &= !rc;
- passed &= (args.np == p1);
+ passed &= (args.np == p[1]);
passed &= (args.args_count == 1);
passed &= (args.args[0] == 1);
break;
case 1:
passed &= !rc;
- passed &= (args.np == p3);
+ passed &= (args.np == p[3]);
passed &= (args.args_count == 3);
passed &= (args.args[0] == 2);
passed &= (args.args[1] == 5);
@@ -536,28 +628,36 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
break;
case 3:
passed &= !rc;
- passed &= (args.np == p0);
+ passed &= (args.np == p[0]);
passed &= (args.args_count == 0);
break;
case 4:
passed &= !rc;
- passed &= (args.np == p1);
+ passed &= (args.np == p[1]);
passed &= (args.args_count == 1);
passed &= (args.args[0] == 3);
break;
case 5:
passed &= !rc;
- passed &= (args.np == p0);
+ passed &= (args.np == p[0]);
passed &= (args.args_count == 0);
break;
case 6:
passed &= !rc;
- passed &= (args.np == p2);
+ passed &= (args.np == p[2]);
passed &= (args.args_count == 2);
passed &= (args.args[0] == 15);
passed &= (args.args[1] == 0x20);
break;
case 7:
+ passed &= !rc;
+ passed &= (args.np == p[3]);
+ passed &= (args.args_count == 3);
+ passed &= (args.args[0] == 2);
+ passed &= (args.args[1] == 5);
+ passed &= (args.args[2] == 3);
+ break;
+ case 8:
passed &= (rc == -ENOENT);
break;
default:
@@ -566,6 +666,9 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
unittest(passed, "index %i - data error on node %s rc=%i\n",
i, args.np->full_name, rc);
+
+ if (rc == 0)
+ of_node_put(args.np);
}
/* Check for missing list property */
@@ -591,6 +694,13 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
"phandle", 1, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+ for (i = 0; i < ARRAY_SIZE(p); ++i) {
+ unittest(prefs[i] == OF_KREF_READ(p[i]),
+ "provider%d: expected:%d got:%d\n",
+ i, prefs[i], OF_KREF_READ(p[i]));
+ of_node_put(p[i]);
+ }
}
static void __init of_unittest_property_string(void)
@@ -1151,6 +1261,8 @@ static void attach_node_and_children(struct device_node *np)
const char *full_name;
full_name = kasprintf(GFP_KERNEL, "%pOF", np);
+ if (!full_name)
+ return;
if (!strcmp(full_name, "/__local_fixups__") ||
!strcmp(full_name, "/__fixups__")) {
@@ -1580,7 +1692,7 @@ static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
}
/* unittest device must be again in before state */
- if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
+ if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
unittest(0, "%s with device @\"%s\" %s\n",
overlay_name_from_nr(overlay_nr),
unittest_path(unittest_nr, ovtype),
@@ -2100,6 +2212,153 @@ static inline void of_unittest_overlay_i2c_15(void) { }
#endif
+static void __init of_unittest_overlay_gpio(void)
+{
+ int chip_request_count;
+ int probe_pass_count;
+ int ret;
+
+ /*
+ * tests: apply overlays before registering driver
+ * Similar to installing a driver as a module, the
+ * driver is registered after applying the overlays.
+ *
+ * - apply overlay_gpio_01
+ * - apply overlay_gpio_02a
+ * - apply overlay_gpio_02b
+ * - register driver
+ *
+ * register driver will result in
+ * - probe and processing gpio hog for overlay_gpio_01
+ * - probe for overlay_gpio_02a
+ * - processing gpio for overlay_gpio_02b
+ */
+
+ probe_pass_count = unittest_gpio_probe_pass_count;
+ chip_request_count = unittest_gpio_chip_request_count;
+
+ /*
+ * overlay_gpio_01 contains gpio node and child gpio hog node
+ * overlay_gpio_02a contains gpio node
+ * overlay_gpio_02b contains child gpio hog node
+ */
+
+ unittest(overlay_data_apply("overlay_gpio_01", NULL),
+ "Adding overlay 'overlay_gpio_01' failed\n");
+
+ unittest(overlay_data_apply("overlay_gpio_02a", NULL),
+ "Adding overlay 'overlay_gpio_02a' failed\n");
+
+ unittest(overlay_data_apply("overlay_gpio_02b", NULL),
+ "Adding overlay 'overlay_gpio_02b' failed\n");
+
+ /*
+ * messages are the result of the probes, after the
+ * driver is registered
+ */
+
+ EXPECT_BEGIN(KERN_INFO,
+ "gpio-<<int>> (line-B-input): hogged as input\n");
+
+ EXPECT_BEGIN(KERN_INFO,
+ "gpio-<<int>> (line-A-input): hogged as input\n");
+
+ ret = platform_driver_register(&unittest_gpio_driver);
+ if (unittest(ret == 0, "could not register unittest gpio driver\n"))
+ return;
+
+ EXPECT_END(KERN_INFO,
+ "gpio-<<int>> (line-A-input): hogged as input\n");
+ EXPECT_END(KERN_INFO,
+ "gpio-<<int>> (line-B-input): hogged as input\n");
+
+ unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
+ "unittest_gpio_probe() failed or not called\n");
+
+ unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
+ "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
+ unittest_gpio_chip_request_count - chip_request_count);
+
+ /*
+ * tests: apply overlays after registering driver
+ *
+ * Similar to a driver built-in to the kernel, the
+ * driver is registered before applying the overlays.
+ *
+ * overlay_gpio_03 contains gpio node and child gpio hog node
+ *
+ * - apply overlay_gpio_03
+ *
+ * apply overlay will result in
+ * - probe and processing gpio hog.
+ */
+
+ probe_pass_count = unittest_gpio_probe_pass_count;
+ chip_request_count = unittest_gpio_chip_request_count;
+
+ EXPECT_BEGIN(KERN_INFO,
+ "gpio-<<int>> (line-D-input): hogged as input\n");
+
+ /* overlay_gpio_03 contains gpio node and child gpio hog node */
+
+ unittest(overlay_data_apply("overlay_gpio_03", NULL),
+ "Adding overlay 'overlay_gpio_03' failed\n");
+
+ EXPECT_END(KERN_INFO,
+ "gpio-<<int>> (line-D-input): hogged as input\n");
+
+ unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
+ "unittest_gpio_probe() failed or not called\n");
+
+ unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
+ "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
+ unittest_gpio_chip_request_count - chip_request_count);
+
+ /*
+ * overlay_gpio_04a contains gpio node
+ *
+ * - apply overlay_gpio_04a
+ *
+ * apply the overlay will result in
+ * - probe for overlay_gpio_04a
+ */
+
+ probe_pass_count = unittest_gpio_probe_pass_count;
+ chip_request_count = unittest_gpio_chip_request_count;
+
+ /* overlay_gpio_04a contains gpio node */
+
+ unittest(overlay_data_apply("overlay_gpio_04a", NULL),
+ "Adding overlay 'overlay_gpio_04a' failed\n");
+
+ unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
+ "unittest_gpio_probe() failed or not called\n");
+
+ /*
+ * overlay_gpio_04b contains child gpio hog node
+ *
+ * - apply overlay_gpio_04b
+ *
+ * apply the overlay will result in
+ * - processing gpio for overlay_gpio_04b
+ */
+
+ EXPECT_BEGIN(KERN_INFO,
+ "gpio-<<int>> (line-C-input): hogged as input\n");
+
+ /* overlay_gpio_04b contains child gpio hog node */
+
+ unittest(overlay_data_apply("overlay_gpio_04b", NULL),
+ "Adding overlay 'overlay_gpio_04b' failed\n");
+
+ EXPECT_END(KERN_INFO,
+ "gpio-<<int>> (line-C-input): hogged as input\n");
+
+ unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
+ "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
+ unittest_gpio_chip_request_count - chip_request_count);
+}
+
static void __init of_unittest_overlay(void)
{
struct device_node *bus_np = NULL;
@@ -2159,6 +2418,8 @@ static void __init of_unittest_overlay(void)
of_unittest_overlay_i2c_cleanup();
#endif
+ of_unittest_overlay_gpio();
+
of_unittest_destroy_tracked_overlays();
out:
@@ -2212,6 +2473,12 @@ OVERLAY_INFO_EXTERN(overlay_11);
OVERLAY_INFO_EXTERN(overlay_12);
OVERLAY_INFO_EXTERN(overlay_13);
OVERLAY_INFO_EXTERN(overlay_15);
+OVERLAY_INFO_EXTERN(overlay_gpio_01);
+OVERLAY_INFO_EXTERN(overlay_gpio_02a);
+OVERLAY_INFO_EXTERN(overlay_gpio_02b);
+OVERLAY_INFO_EXTERN(overlay_gpio_03);
+OVERLAY_INFO_EXTERN(overlay_gpio_04a);
+OVERLAY_INFO_EXTERN(overlay_gpio_04b);
OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
OVERLAY_INFO_EXTERN(overlay_bad_phandle);
@@ -2236,6 +2503,12 @@ static struct overlay_info overlays[] = {
OVERLAY_INFO(overlay_12, 0),
OVERLAY_INFO(overlay_13, 0),
OVERLAY_INFO(overlay_15, 0),
+ OVERLAY_INFO(overlay_gpio_01, 0),
+ OVERLAY_INFO(overlay_gpio_02a, 0),
+ OVERLAY_INFO(overlay_gpio_02b, 0),
+ OVERLAY_INFO(overlay_gpio_03, 0),
+ OVERLAY_INFO(overlay_gpio_04a, 0),
+ OVERLAY_INFO(overlay_gpio_04b, 0),
OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-30 19:32:36 +0000