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Fri, 25 Oct 2024 21:46:06 +0200 (CEST) From: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= Subject: [PATCH RFC v2 0/5] Verify bias functionality for pinctrl_paris driver through new gpio test Date: Fri, 25 Oct 2024 15:45:35 -0400 Message-Id: <20241025-kselftest-gpio-set-get-config-v2-0-040d748840bb@collabora.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAF/1G2cC/4WNTQrCMBCFr1JmbSSpNlJXguAB3EoX6ThpB9tOS UpRSu9uKO5dPHg/8L0FIgWmCOdsgUAzR5YhhXyXAbZuaEjxM2XIdX7UpbbqFanzE8VJNSOLipR MEsrguVGWirq2J43GFZAYYyDP743/gPvtClUqW46ThM/2OZtt+uHLP/jZKK2MddoWzuMBzQWl6 1wtwe1ReqjWdf0C88Dq29MAAAA= X-Change-ID: 20240906-kselftest-gpio-set-get-config-6e5bb670c1a5 To: Sean Wang , Linus Walleij , Matthias Brugger , AngeloGioacchino Del Regno , Bamvor Jian Zhang , Shuah Khan Cc: kernel@collabora.com, linux-mediatek@lists.infradead.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kernelci@lists.linux.dev, =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= X-Mailer: b4 0.14.2 This series was motivated by the regression fixed by 166bf8af9122 ("pinctrl: mediatek: common-v2: Fix broken bias-disable for PULL_PU_PD_RSEL_TYPE"). A bug was introduced in the pinctrl_paris driver which prevented certain pins from having their bias configured. Running this test on the mt8195-tomato platform with the test plan included below[1] shows the test passing with the fix applied, but failing without the fix: With fix: $ ./gpio-setget-config.py TAP version 13 # Using test plan file: ./google,tomato.yaml 1..3 ok 1 pinctrl_paris.34.pull-up ok 2 pinctrl_paris.34.pull-down ok 3 pinctrl_paris.34.disabled # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0 Without fix: $ ./gpio-setget-config.py TAP version 13 # Using test plan file: ./google,tomato.yaml 1..3 # Bias doesn't match: Expected pull-up, read pull-down. not ok 1 pinctrl_paris.34.pull-up ok 2 pinctrl_paris.34.pull-down # Bias doesn't match: Expected disabled, read pull-down. not ok 3 pinctrl_paris.34.disabled # Totals: pass:1 fail:2 xfail:0 xpass:0 skip:0 error:0 In order to achieve this, the first three patches expose bias configuration through the GPIO API in the MediaTek pinctrl drivers, notably, pinctrl_paris, patch 4 extends the gpio-mockup-cdev utility for use by patch 5, and patch 5 introduces a new GPIO kselftest that takes a test plan in YAML, which can be tailored per-platform to specify the configurations to test, and sets and gets back each pin configuration to verify that they match and thus that the driver is behaving as expected. Since the GPIO uAPI only allows setting the pin configuration, getting it back is done through pinconf-pins in the pinctrl debugfs folder. The test currently only verifies bias but it would be easy to extend to verify other pin configurations. The test plan YAML file can be customized for each use-case and is platform-dependant. For that reason, only an example is included in patch 3 and the user is supposed to provide their test plan. That said, the aim is to collect test plans for ease of use at [2]. [1] This is the test plan used for mt8195-tomato: - label: "pinctrl_paris" tests: # Pin 34 has type MTK_PULL_PU_PD_RSEL_TYPE and is unused. # Setting bias to MTK_PULL_PU_PD_RSEL_TYPE pins was fixed by # 166bf8af9122 ("pinctrl: mediatek: common-v2: Fix broken bias-disable for PULL_PU_PD_RSEL_TYPE") - pin: 34 bias: "pull-up" - pin: 34 bias: "pull-down" - pin: 34 bias: "disabled" [2] https://github.com/kernelci/platform-test-parameters Signed-off-by: Nícolas F. R. A. Prado --- Changes in v2: - Added patches 2 and 3 enabling the extra GPIO pin configurations on the other mediatek drivers: pinctrl-moore and pinctrl-mtk-common - Tweaked function name in patch 1: mtk_pinconf_set -> mtk_paris_pin_config_set, to make it clear it is not a pinconf_ops - Adjusted commit message to make it clear the current support is limited to pins supported by the EINT controller - Link to v1: https://lore.kernel.org/r/20240909-kselftest-gpio-set-get-config-v1-0-16a065afc3c1@collabora.com --- Nícolas F. R. A. Prado (5): pinctrl: mediatek: paris: Expose more configurations to GPIO set_config pinctrl: mediatek: moore: Expose more configurations to GPIO set_config pinctrl: mediatek: common: Expose more configurations to GPIO set_config selftest: gpio: Add wait flag to gpio-mockup-cdev selftest: gpio: Add a new set-get config test drivers/pinctrl/mediatek/pinctrl-moore.c | 283 +++++++++++---------- drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 48 ++-- drivers/pinctrl/mediatek/pinctrl-paris.c | 26 +- tools/testing/selftests/gpio/Makefile | 2 +- tools/testing/selftests/gpio/gpio-mockup-cdev.c | 14 +- .../gpio-set-get-config-example-test-plan.yaml | 15 ++ .../testing/selftests/gpio/gpio-set-get-config.py | 183 +++++++++++++ 7 files changed, 395 insertions(+), 176 deletions(-) --- base-commit: a39230ecf6b3057f5897bc4744a790070cfbe7a8 change-id: 20240906-kselftest-gpio-set-get-config-6e5bb670c1a5 Best regards,