| /* |
| * Copyright (c) 2021 Nordic Semiconductor ASA. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/ztest.h> |
| #include <zephyr/pm/device.h> |
| #include <zephyr/pm/device_runtime.h> |
| |
| #include "test_driver.h" |
| |
| static const struct device *dev; |
| static struct k_thread get_runner_td; |
| K_THREAD_STACK_DEFINE(get_runner_stack, 1024); |
| |
| static void get_runner(void *arg1, void *arg2, void *arg3) |
| { |
| int ret; |
| bool ongoing; |
| |
| ARG_UNUSED(arg1); |
| ARG_UNUSED(arg2); |
| ARG_UNUSED(arg3); |
| |
| /* make sure we test blocking path (suspend is ongoing) */ |
| ongoing = test_driver_pm_ongoing(dev); |
| zassert_equal(ongoing, true); |
| |
| /* usage: 0, +1, resume: yes */ |
| ret = pm_device_runtime_get(dev); |
| zassert_equal(ret, 0); |
| } |
| |
| void test_api_setup(void *data) |
| { |
| int ret; |
| enum pm_device_state state; |
| |
| /* check API always returns 0 when runtime PM is disabled */ |
| ret = pm_device_runtime_get(dev); |
| zassert_equal(ret, 0); |
| ret = pm_device_runtime_put(dev); |
| zassert_equal(ret, 0); |
| ret = pm_device_runtime_put_async(dev); |
| zassert_equal(ret, 0); |
| |
| /* enable runtime PM */ |
| ret = pm_device_runtime_enable(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_SUSPENDED); |
| |
| /* enabling again should succeed (no-op) */ |
| ret = pm_device_runtime_enable(dev); |
| zassert_equal(ret, 0); |
| } |
| |
| static void test_api_teardown(void *data) |
| { |
| int ret; |
| enum pm_device_state state; |
| |
| /* let test driver finish async PM (in case it was left pending due to |
| * a failure) |
| */ |
| if (test_driver_pm_ongoing(dev)) { |
| test_driver_pm_done(dev); |
| } |
| |
| /* disable runtime PM, make sure device is left into active state */ |
| ret = pm_device_runtime_disable(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_ACTIVE); |
| } |
| |
| /** |
| * @brief Test the behavior of the device runtime PM API. |
| * |
| * Scenarios tested: |
| * |
| * - get + put |
| * - get + asynchronous put until suspended |
| * - get + asynchronous put + get (while suspend still ongoing) |
| */ |
| ZTEST(device_runtime_api, test_api) |
| { |
| int ret; |
| enum pm_device_state state; |
| |
| /* device is initially suspended */ |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_SUSPENDED); |
| |
| /*** get + put ***/ |
| |
| /* usage: 0, +1, resume: yes */ |
| ret = pm_device_runtime_get(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_ACTIVE); |
| |
| /* usage: 1, +1, resume: no */ |
| ret = pm_device_runtime_get(dev); |
| zassert_equal(ret, 0); |
| |
| /* usage: 2, -1, suspend: no */ |
| ret = pm_device_runtime_put(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_ACTIVE); |
| |
| /* usage: 1, -1, suspend: yes */ |
| ret = pm_device_runtime_put(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_SUSPENDED); |
| |
| /* usage: 0, -1, suspend: no (unbalanced call) */ |
| ret = pm_device_runtime_put(dev); |
| zassert_equal(ret, -EALREADY); |
| |
| /*** get + asynchronous put until suspended ***/ |
| |
| /* usage: 0, +1, resume: yes */ |
| ret = pm_device_runtime_get(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_ACTIVE); |
| |
| test_driver_pm_async(dev); |
| |
| /* usage: 1, -1, suspend: yes (queued) */ |
| ret = pm_device_runtime_put_async(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_SUSPENDING); |
| |
| /* usage: 0, -1, suspend: no (unbalanced call) */ |
| ret = pm_device_runtime_put(dev); |
| zassert_equal(ret, -EALREADY); |
| |
| /* usage: 0, -1, suspend: no (unbalanced call) */ |
| ret = pm_device_runtime_put_async(dev); |
| zassert_equal(ret, -EALREADY); |
| |
| /* unblock test driver and let it finish */ |
| test_driver_pm_done(dev); |
| k_yield(); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_SUSPENDED); |
| |
| /*** get + asynchronous put + get (while suspend still ongoing) ***/ |
| |
| /* usage: 0, +1, resume: yes */ |
| ret = pm_device_runtime_get(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_ACTIVE); |
| |
| test_driver_pm_async(dev); |
| |
| /* usage: 1, -1, suspend: yes (queued) */ |
| ret = pm_device_runtime_put_async(dev); |
| zassert_equal(ret, 0); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_SUSPENDING); |
| |
| /* let suspension start */ |
| k_yield(); |
| |
| /* create and start get_runner thread |
| * get_runner thread is used to test synchronous path while asynchronous |
| * is ongoing. It is important to set its priority >= to the system work |
| * queue to make sure sync path run by the thread is forced to wait. |
| */ |
| k_thread_create(&get_runner_td, get_runner_stack, |
| K_THREAD_STACK_SIZEOF(get_runner_stack), get_runner, |
| NULL, NULL, NULL, CONFIG_SYSTEM_WORKQUEUE_PRIORITY, 0, |
| K_NO_WAIT); |
| k_yield(); |
| |
| /* let driver suspend to finish and wait until get_runner finishes |
| * resuming the driver |
| */ |
| test_driver_pm_done(dev); |
| k_thread_join(&get_runner_td, K_FOREVER); |
| |
| (void)pm_device_state_get(dev, &state); |
| zassert_equal(state, PM_DEVICE_STATE_ACTIVE); |
| |
| /* Put operation should fail due the state be locked. */ |
| ret = pm_device_runtime_disable(dev); |
| zassert_equal(ret, 0); |
| |
| pm_device_state_lock(dev); |
| |
| /* This operation should not succeed. */ |
| ret = pm_device_runtime_enable(dev); |
| zassert_equal(ret, -EPERM); |
| |
| /* After unlock the state, enable runtime should work. */ |
| pm_device_state_unlock(dev); |
| |
| ret = pm_device_runtime_enable(dev); |
| zassert_equal(ret, 0); |
| } |
| |
| DEVICE_DEFINE(pm_unsupported_device, "PM Unsupported", NULL, NULL, NULL, NULL, |
| APPLICATION, 0, NULL); |
| |
| ZTEST(device_runtime_api, test_unsupported) |
| { |
| const struct device *const dev = DEVICE_GET(pm_unsupported_device); |
| |
| zassert_false(pm_device_runtime_is_enabled(dev), ""); |
| zassert_equal(pm_device_runtime_enable(dev), -ENOTSUP, ""); |
| zassert_equal(pm_device_runtime_disable(dev), -ENOTSUP, ""); |
| zassert_equal(pm_device_runtime_get(dev), 0, ""); |
| zassert_equal(pm_device_runtime_put(dev), 0, ""); |
| } |
| |
| int dev_pm_control(const struct device *dev, enum pm_device_action action) |
| { |
| ARG_UNUSED(dev); |
| ARG_UNUSED(action); |
| |
| return 0; |
| } |
| |
| PM_DEVICE_DT_DEFINE(DT_NODELABEL(test_dev), dev_pm_control); |
| DEVICE_DT_DEFINE(DT_NODELABEL(test_dev), NULL, PM_DEVICE_DT_GET(DT_NODELABEL(test_dev)), |
| NULL, NULL, POST_KERNEL, 80, NULL); |
| |
| ZTEST(device_runtime_api, test_pm_device_runtime_auto) |
| { |
| const struct device *const dev = DEVICE_DT_GET(DT_NODELABEL(test_dev)); |
| |
| zassert_true(pm_device_runtime_is_enabled(dev), ""); |
| zassert_equal(pm_device_runtime_get(dev), 0, ""); |
| zassert_equal(pm_device_runtime_put(dev), 0, ""); |
| } |
| |
| void *device_runtime_api_setup(void) |
| { |
| dev = device_get_binding("test_driver"); |
| zassert_not_null(dev, NULL); |
| return NULL; |
| } |
| |
| ZTEST_SUITE(device_runtime_api, NULL, device_runtime_api_setup, |
| test_api_setup, test_api_teardown, NULL); |