tests: drivers: kscan: Add simple API tests

Introduce API tests for kscan driver

Signed-off-by: Francisco Munoz <[email protected]>

Author: franciscomunoz

tests/drivers/kscan/kscan_api/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.13.1)
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(kscan_api)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/drivers/kscan/kscan_api/mec15xxevb_assy6853.conf

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+CONFIG_KSCAN=y
+CONFIG_ZTEST=y
+

tests/drivers/kscan/kscan_api/prj.conf

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+CONFIG_KSCAN=y
+CONFIG_USERSPACE=y
+CONFIG_ZTEST=y
+

tests/drivers/kscan/kscan_api/src/main.c

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+/*
+ * Copyright (c) 2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+#include <ztest.h>
+
+void test_init_callback(void);
+void test_control_callback(void);
+
+void test_main(void)
+{
+	ztest_test_suite(kscan_basic_test,
+			 ztest_unit_test(test_init_callback),
+			 ztest_unit_test(test_control_callback));
+	ztest_run_test_suite(kscan_basic_test);
+}

tests/drivers/kscan/kscan_api/src/test_kscan.c

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+/*
+ * Copyright (c) 2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <device.h>
+#include <stdlib.h>
+#include <drivers/kscan.h>
+#include <zephyr.h>
+#include <ztest.h>
+
+#if defined(DT_KSCAN_0_NAME)
+#define KSCAN_DEV_NAME DT_KSCAN_0_NAME
+#endif
+
+static void kb_callback(struct device *dev, u8_t row, u8_t col, bool pressed)
+{
+	ARG_UNUSED(dev);
+	ARG_UNUSED(row);
+	ARG_UNUSED(col);
+	ARG_UNUSED(pressed);
+}
+
+static int test_kb_callback(void)
+{
+	struct device *kscan_dev = device_get_binding(KSCAN_DEV_NAME);
+
+	if (!kscan_dev) {
+		TC_PRINT("Cannot get KBSCAN device\n");
+		return TC_FAIL;
+	}
+
+	if (kscan_config(kscan_dev, kb_callback) != 0) {
+		TC_PRINT("Unexpected error code received\n");
+		return TC_FAIL;
+	}
+
+	return TC_PASS;
+}
+
+static int test_null_callback(void)
+{
+	struct device *kscan_dev = device_get_binding(KSCAN_DEV_NAME);
+
+	if (!kscan_dev) {
+		TC_PRINT("Cannot get KBSCAN device\n");
+		return TC_FAIL;
+	}
+
+	if (kscan_config(kscan_dev, NULL) != -EINVAL) {
+		TC_PRINT("Unexpected error code received\n");
+		return TC_FAIL;
+	}
+
+	return TC_PASS;
+}
+
+static int test_disable_enable_callback(void)
+{
+	struct device *kscan_dev = device_get_binding(KSCAN_DEV_NAME);
+
+	if (!kscan_dev) {
+		TC_PRINT("Cannot get KBSCAN device\n");
+		return TC_FAIL;
+	}
+
+	if (kscan_config(kscan_dev, kb_callback) != 0) {
+		TC_PRINT("Unexpected error code received\n");
+		return TC_FAIL;
+	}
+
+	if (kscan_disable_callback(kscan_dev) != 0) {
+		TC_PRINT("Error while disabling callback\n");
+		return TC_FAIL;
+	}
+
+	if (kscan_enable_callback(kscan_dev) != 0) {
+		TC_PRINT("Error while enabling callback\n");
+		return TC_FAIL;
+	}
+
+	return TC_PASS;
+}
+
+void test_init_callback(void)
+{
+	/* Configure kscan matrix with an appropriate callback */
+	zassert_true(test_kb_callback() == TC_PASS, NULL);
+	k_sleep(K_MSEC(1000));
+
+	/* Configure kscan with a null callback */
+	zassert_true(test_null_callback() == TC_PASS, NULL);
+}
+
+void test_control_callback(void)
+{
+	/* Disable/enable notifications to user */
+	zassert_true(test_disable_enable_callback() == TC_PASS, NULL);
+	k_sleep(K_MSEC(1000));
+}
+

tests/drivers/kscan/kscan_api/testcase.yaml

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+tests:
+  peripheral.kscan:
+    tags: drivers kscan userspace
+    depends_on: kscan
+    platform_exclude: mec15xxevb_assy6853
+  peripheral.kscan.mec15xxevb_assy6853:
+    depends_on: kscan
+    tags: drivers kscan
+    extra_args: CONF_FILE="mec15xxevb_assy6853.conf"
+    platform_whitelist: mec15xxevb_assy6853