static void __init of_unittest_overlay_gpio()

in unittest.c [1655:1805]

• 58 lines of code
• 2 McCabe index (conditional complexity)

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.
	 *
	 * The overlays are applied by overlay_data_apply()
	 * instead of of_unittest_apply_overlay() so that they
	 * will not be tracked.  Thus they will not be removed
	 * by of_unittest_remove_tracked_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);
}