dm: test: Add a test for the reset uclass

Add tests that confirm that the drivers work as expected, and we can walk
through the available reset types trying to reset the board.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/dm/Makefile

@@ -20,6 +20,7 @@ obj-$(CONFIG_DM_ETH) += eth.o
 obj-$(CONFIG_DM_GPIO) += gpio.o
 obj-$(CONFIG_DM_I2C) += i2c.o
 obj-$(CONFIG_DM_PCI) += pci.o
+obj-$(CONFIG_RESET) += reset.o
 obj-$(CONFIG_DM_RTC) += rtc.o
 obj-$(CONFIG_DM_SPI_FLASH) += sf.o
 obj-$(CONFIG_DM_SPI) += spi.o

test/dm/reset.c

+/*
+ * Copyright (C) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <reset.h>
+#include <asm/state.h>
+#include <asm/test.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+/* Test that we can use particular reset devices */
+static int dm_test_reset_base(struct unit_test_state *uts)
+{
+	struct sandbox_state *state = state_get_current();
+	struct udevice *dev;
+
+	/* Device 0 is the platform data device - it should never respond */
+	ut_assertok(uclass_get_device(UCLASS_RESET, 0, &dev));
+	ut_asserteq(-ENODEV, reset_request(dev, RESET_WARM));
+	ut_asserteq(-ENODEV, reset_request(dev, RESET_COLD));
+	ut_asserteq(-ENODEV, reset_request(dev, RESET_POWER));
+
+	/* Device 1 is the warm reset device */
+	ut_assertok(uclass_get_device(UCLASS_RESET, 1, &dev));
+	ut_asserteq(-EACCES, reset_request(dev, RESET_WARM));
+	ut_asserteq(-ENOSYS, reset_request(dev, RESET_COLD));
+	ut_asserteq(-ENOSYS, reset_request(dev, RESET_POWER));
+
+	state->reset_allowed[RESET_WARM] = true;
+	ut_asserteq(-EINPROGRESS, reset_request(dev, RESET_WARM));
+	state->reset_allowed[RESET_WARM] = false;
+
+	/* Device 2 is the cold reset device */
+	ut_assertok(uclass_get_device(UCLASS_RESET, 2, &dev));
+	ut_asserteq(-ENOSYS, reset_request(dev, RESET_WARM));
+	ut_asserteq(-EACCES, reset_request(dev, RESET_COLD));
+	state->reset_allowed[RESET_POWER] = false;
+	ut_asserteq(-EACCES, reset_request(dev, RESET_POWER));
+	state->reset_allowed[RESET_POWER] = true;
+
+	return 0;
+}
+DM_TEST(dm_test_reset_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test that we can walk through the reset devices */
+static int dm_test_reset_walk(struct unit_test_state *uts)
+{
+	struct sandbox_state *state = state_get_current();
+
+	/* If we generate a power reset, we will exit sandbox! */
+	state->reset_allowed[RESET_POWER] = false;
+	ut_asserteq(-EACCES, reset_walk(RESET_WARM));
+	ut_asserteq(-EACCES, reset_walk(RESET_COLD));
+	ut_asserteq(-EACCES, reset_walk(RESET_POWER));
+
+	/*
+	 * Enable cold reset - this should make cold reset work, plus a warm
+	 * reset should be promoted to cold, since this is the next step
+	 * along.
+	 */
+	state->reset_allowed[RESET_COLD] = true;
+	ut_asserteq(-EINPROGRESS, reset_walk(RESET_WARM));
+	ut_asserteq(-EINPROGRESS, reset_walk(RESET_COLD));
+	ut_asserteq(-EACCES, reset_walk(RESET_POWER));
+	state->reset_allowed[RESET_COLD] = false;
+	state->reset_allowed[RESET_POWER] = true;
+
+	return 0;
+}
+DM_TEST(dm_test_reset_walk, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);