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@@ -0,0 +1,74 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
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+ *
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+ * Based on led.c
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+ */
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+
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+#include <common.h>
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+#include <dm.h>
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+#include <button.h>
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+#include <asm/gpio.h>
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+#include <dm/test.h>
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+#include <test/ut.h>
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+
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+/* Base test of the button uclass */
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+static int dm_test_button_base(struct unit_test_state *uts)
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+{
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+ struct udevice *dev;
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+
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+ /* Get the top-level device */
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+ ut_assertok(uclass_get_device(UCLASS_BUTTON, 0, &dev));
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+ ut_assertok(uclass_get_device(UCLASS_BUTTON, 1, &dev));
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+ ut_assertok(uclass_get_device(UCLASS_BUTTON, 2, &dev));
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+ ut_asserteq(-ENODEV, uclass_get_device(UCLASS_BUTTON, 3, &dev));
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+
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+ return 0;
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+}
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+DM_TEST(dm_test_button_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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+
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+/* Test of the button uclass using the button_gpio driver */
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+static int dm_test_button_gpio(struct unit_test_state *uts)
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+{
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+ const int offset = 3;
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+ struct udevice *dev, *gpio;
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+
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+ /*
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+ * Check that we can manipulate an BUTTON. BUTTON 1 is connected to GPIO
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+ * bank gpio_a, offset 3.
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+ */
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+ ut_assertok(uclass_get_device(UCLASS_BUTTON, 1, &dev));
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+ ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio));
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+
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+ ut_asserteq(0, sandbox_gpio_set_value(gpio, offset, 0));
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+ ut_asserteq(0, sandbox_gpio_get_value(gpio, offset));
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+ ut_asserteq(BUTTON_OFF, button_get_state(dev));
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+
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+ ut_asserteq(0, sandbox_gpio_set_value(gpio, offset, 1));
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+ ut_asserteq(1, sandbox_gpio_get_value(gpio, offset));
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+ ut_asserteq(BUTTON_ON, button_get_state(dev));
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+
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+ return 0;
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+}
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+DM_TEST(dm_test_button_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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+
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+/* Test obtaining an BUTTON by label */
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+static int dm_test_button_label(struct unit_test_state *uts)
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+{
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+ struct udevice *dev, *cmp;
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+
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+ ut_assertok(button_get_by_label("summer", &dev));
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+ ut_asserteq(1, device_active(dev));
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+ ut_assertok(uclass_get_device(UCLASS_BUTTON, 1, &cmp));
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+ ut_asserteq_ptr(dev, cmp);
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+
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+ ut_assertok(button_get_by_label("christmas", &dev));
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+ ut_asserteq(1, device_active(dev));
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+ ut_assertok(uclass_get_device(UCLASS_BUTTON, 2, &cmp));
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+ ut_asserteq_ptr(dev, cmp);
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+
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+ ut_asserteq(-ENODEV, button_get_by_label("spring", &dev));
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+
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+ return 0;
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+}
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+DM_TEST(dm_test_button_label, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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