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tests: drivers: pinctrl: add tests for API
Add a set of tests to check the API behavior. The API tests can only run on a platform that does not have an actual pinctrl driver, e.g. native_posix. The test itself implements a pinctrl mock driver and provides the required "pinctrl_soc.h" header with required types/macros. The implementation is used in the tests to verify the behavior of the API or Devicetree macros. Signed-off-by: Gerard Marull-Paretas <[email protected]>
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‎dts/bindings/test/vnd,pinctrl-device.yaml‎

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# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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description: Test device for pin controller.
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compatible: "vnd,pinctrl-device"
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include: [base.yaml, pinctrl-device.yaml]

‎dts/bindings/test/vnd,pinctrl-test.yaml‎

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# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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description: |
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Test pin controller.
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compatible: "vnd,pinctrl-test"
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include:
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- name: base.yaml
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- name: pincfg-node-group.yaml
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child-binding:
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child-binding:
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property-allowlist:
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- bias-pull-down
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- bias-pull-up
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child-binding:
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description: |
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Test pin controller pin configuration nodes. Each node is composed by one or
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more groups, each defining the configuration for a set of pins.
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child-binding:
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description: |
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Test pin controller pin configuration group. Each group contains a list of
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pins sharing the same set of properties. Example:
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/* node representing default state for test_device0 */
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test_device0_default: test_device0_default {
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/* group 1 (name is arbitrary) */
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pins1 {
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/* configure pins 0 and 1 */
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pins = <0>, <1>;
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/* both pins 0 and 1 have pull-up enabled */
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bias-pull-up;
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};
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...
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/* group N (name is arbitrary) */
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pinsN {
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/* configure pin M */
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pins = <M>;
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/* pin M has pull-down enabled */
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bias-pull-down;
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};
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};
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The list of supported standard properties:
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- bias-pull-up: Enable pull-up resistor.
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- bias-pull-down: Enable pull-down resistor.
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properties:
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pins:
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required: true
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type: array
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description: |
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An array of pins sharing the same group properties. Each entry is a
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32-bit integer that is just used to identify the entry for testing
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purposes.

‎tests/drivers/pinctrl/api/CMakeLists.txt‎

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# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(pinctrl_api)
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zephyr_include_directories(src)
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zephyr_include_directories(../common)
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target_sources(app PRIVATE src/main.c src/pinctrl_test.c ../common/test_device.c)

‎tests/drivers/pinctrl/api/Kconfig‎

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# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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mainmenu "pinctrl API Test"
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source "Kconfig.zephyr"
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config PINCTRL_TEST_STORE_REG
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bool "Store register address"
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select PINCTRL_STORE_REG
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help
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This option should be selected by unit tests that want to store the
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register address of devices.

‎tests/drivers/pinctrl/api/app.overlay‎

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/*
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* Copyright (c) 2021 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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pinctrl {
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compatible = "vnd,pinctrl-test";
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/* default state for device 0 */
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test_device0_default: test_device0_default {
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pins1 {
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pins = <0>;
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bias-pull-up;
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};
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pins2 {
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pins = <1>;
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bias-pull-down;
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};
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};
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/* sleep state for device 0 */
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test_device0_sleep: test_device0_sleep {
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pins1 {
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pins = <0>, <1>;
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};
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};
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/* alternative default state for device 0 */
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test_device0_alt_default: test_device0_alt_default {
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pins1 {
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pins = <2>;
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bias-pull-down;
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};
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pins2 {
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pins = <3>;
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bias-pull-up;
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};
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};
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/* alternative sleep state for device 0 */
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test_device0_alt_sleep: test_device0_alt_sleep {
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pins1 {
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pins = <2>, <3>;
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};
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};
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/* default state for device 1 */
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test_device1_default: test_device1_default {
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pins1 {
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pins = <10>, <11>, <12>;
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};
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};
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/* custom state "mystate" for device 1 */
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test_device1_mystate: test_device1_mystate {
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pins1 {
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pins = <10>;
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};
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pins2 {
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pins = <11>;
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bias-pull-up;
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};
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pins3 {
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pins = <12>;
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bias-pull-down;
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};
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};
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};
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zephyr,user {
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test_device0_alt_default = <&test_device0_alt_default>;
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test_device0_alt_sleep = <&test_device0_alt_sleep>;
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};
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test_device0: test_device@0 {
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compatible = "vnd,pinctrl-device";
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reg = <0x0 0x1>;
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pinctrl-0 = <&test_device0_default>;
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pinctrl-1 = <&test_device0_sleep>;
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pinctrl-names = "default", "sleep";
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};
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test_device1: test_device@1 {
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compatible = "vnd,pinctrl-device";
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reg = <0x1 0x1>;
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pinctrl-0 = <&test_device1_default>;
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pinctrl-1 = <&test_device1_mystate>;
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pinctrl-names = "default", "mystate";
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};
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};

‎tests/drivers/pinctrl/api/prj.conf‎

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# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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CONFIG_ZTEST=y
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CONFIG_ZTEST_MOCKING=y
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CONFIG_PINCTRL=y
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CONFIG_PINCTRL_DYNAMIC=y

‎tests/drivers/pinctrl/api/reg.conf‎

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# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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CONFIG_PINCTRL_TEST_STORE_REG=y

‎tests/drivers/pinctrl/api/src/main.c‎

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/*
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* Copyright (c) 2021 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <drivers/pinctrl.h>
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#include <ztest.h>
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#include "test_device.h"
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/* test device 0 */
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#define TEST_DEVICE0 DT_NODELABEL(test_device0)
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PINCTRL_DT_DEV_CONFIG_DECLARE(TEST_DEVICE0);
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static struct pinctrl_dev_config *pcfg0 = PINCTRL_DT_DEV_CONFIG_GET(TEST_DEVICE0);
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/* test device 1 */
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#define TEST_DEVICE1 DT_NODELABEL(test_device1)
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PINCTRL_DT_DEV_CONFIG_DECLARE(TEST_DEVICE1);
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static struct pinctrl_dev_config *pcfg1 = PINCTRL_DT_DEV_CONFIG_GET(TEST_DEVICE1);
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/**
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* @brief Test if configuration for device 0 has been stored as expected.
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*
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* Device 0 is also used to verify that certain states are skipped
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* automatically, e.g. "sleep" if CONFIG_PM_DEVICE is not active.
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*
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* This test together with test_config_dev1 is used to verify that the whole
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* set of macros used to define and initialize pin control config from
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* Devicetree works as expected.
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*/
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static void test_config_dev0(void)
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{
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const struct pinctrl_state *scfg;
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zassert_equal(pcfg0->state_cnt, 1, NULL);
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#ifdef CONFIG_PINCTRL_STORE_REG
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zassert_equal(pcfg0->reg, 0, NULL);
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#endif
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scfg = &pcfg0->states[0];
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zassert_equal(scfg->id, PINCTRL_STATE_DEFAULT, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[0]), 0, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[0]), TEST_PULL_UP, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[1]), 1, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[1]), TEST_PULL_DOWN, NULL);
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}
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/**
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* @brief Test if configuration for device 1 has been stored as expected.
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*
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* Device 1 is also used to verify that custom states can be defined.
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*
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* @see test_config_dev0()
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*/
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static void test_config_dev1(void)
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{
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const struct pinctrl_state *scfg;
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zassert_equal(pcfg1->state_cnt, 2, NULL);
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#ifdef CONFIG_PINCTRL_STORE_REG
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zassert_equal(pcfg1->reg, 1, NULL);
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#endif
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scfg = &pcfg1->states[0];
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zassert_equal(scfg->id, PINCTRL_STATE_DEFAULT, NULL);
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zassert_equal(scfg->pin_cnt, 3, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[0]), 10, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[0]), TEST_PULL_DISABLE, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[1]), 11, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[1]), TEST_PULL_DISABLE, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[2]), 12, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[2]), TEST_PULL_DISABLE, NULL);
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scfg = &pcfg1->states[1];
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zassert_equal(scfg->id, PINCTRL_STATE_MYSTATE, NULL);
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zassert_equal(scfg->pin_cnt, 3, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[0]), 10, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[0]), TEST_PULL_DISABLE, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[1]), 11, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[1]), TEST_PULL_UP, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[2]), 12, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[2]), TEST_PULL_DOWN, NULL);
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}
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/**
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* @brief Test that pinctrl_lookup_state() works as expected
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*/
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static void test_lookup_state(void)
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{
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int ret;
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const struct pinctrl_state *scfg;
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ret = pinctrl_lookup_state(pcfg0, PINCTRL_STATE_DEFAULT, &scfg);
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zassert_equal(ret, 0, NULL);
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zassert_equal_ptr(scfg, &pcfg0->states[0], NULL);
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ret = pinctrl_lookup_state(pcfg0, PINCTRL_STATE_SLEEP, &scfg);
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zassert_equal(ret, -ENOENT, NULL);
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}
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/**
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* @brief Test that pinctrl_apply_state() works as expected.
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*/
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static void test_apply_state(void)
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{
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int ret;
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ztest_expect_data(pinctrl_configure_pins, pins, pcfg0->states[0].pins);
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ztest_expect_value(pinctrl_configure_pins, pin_cnt,
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pcfg0->states[0].pin_cnt);
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#ifdef CONFIG_PINCTRL_STORE_REG
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ztest_expect_value(pinctrl_configure_pins, reg, 0);
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#else
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ztest_expect_value(pinctrl_configure_pins, reg, PINCTRL_REG_NONE);
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#endif
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ret = pinctrl_apply_state(pcfg0, PINCTRL_STATE_DEFAULT);
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zassert_equal(ret, 0, NULL);
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}
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/** Test device 0 alternative pins for default state */
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PINCTRL_DT_STATE_PINS_DEFINE(DT_PATH(zephyr_user), test_device0_alt_default);
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/** Test device 0 alternative pins for sleep state */
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PINCTRL_DT_STATE_PINS_DEFINE(DT_PATH(zephyr_user), test_device0_alt_sleep);
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/** Test device 0 alternative states. */
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static const struct pinctrl_state test_device0_alt[] = {
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PINCTRL_DT_STATE_INIT(test_device0_alt_default, PINCTRL_STATE_DEFAULT),
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};
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/** Test device 0 invalid alternative states. */
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static const struct pinctrl_state test_device0_alt_invalid[] = {
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PINCTRL_DT_STATE_INIT(test_device0_alt_default, PINCTRL_STATE_DEFAULT),
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/* sleep state is skipped (no CONFIG_PM_DEVICE), so it is invalid */
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PINCTRL_DT_STATE_INIT(test_device0_alt_sleep, PINCTRL_STATE_SLEEP),
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};
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/**
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* @brief This test checks if pinctrl_update_states() works as expected.
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*/
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static void test_update_states(void)
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{
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int ret;
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const struct pinctrl_state *scfg;
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ret = pinctrl_update_states(pcfg0, test_device0_alt,
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ARRAY_SIZE(test_device0_alt));
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zassert_equal(ret, 0, NULL);
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scfg = &pcfg0->states[0];
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zassert_equal(TEST_GET_PIN(scfg->pins[0]), 2, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[0]), TEST_PULL_DOWN, NULL);
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zassert_equal(TEST_GET_PIN(scfg->pins[1]), 3, NULL);
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zassert_equal(TEST_GET_PULL(scfg->pins[1]), TEST_PULL_UP, NULL);
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ret = pinctrl_update_states(pcfg0, test_device0_alt_invalid,
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ARRAY_SIZE(test_device0_alt_invalid));
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zassert_equal(ret, -EINVAL, NULL);
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}
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void test_main(void)
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{
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ztest_test_suite(pinctrl_api,
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ztest_unit_test(test_config_dev0),
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ztest_unit_test(test_config_dev1),
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ztest_unit_test(test_lookup_state),
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ztest_unit_test(test_apply_state),
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ztest_unit_test(test_update_states));
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ztest_run_test_suite(pinctrl_api);
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}

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