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[62.78.225.252]) by smtp.gmail.com with ESMTPSA id f9-20020a19ae09000000b004eff64a26ccsm4320559lfc.196.2023.05.03.02.49.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 May 2023 02:49:01 -0700 (PDT) Date: Wed, 3 May 2023 12:48:57 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Matti Vaittinen , Andy Shevchenko , Shreeya Patel , Zhigang Shi , Paul Gazzillo , Dmitry Osipenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/5] iio: trigger: Add simple trigger_validation helper Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Some triggers can only be attached to the IIO device that corresponds to the same physical device. Implement generic helper which can be used as a validate_trigger callback for such devices. Suggested-by: Jonathan Cameron Signed-off-by: Matti Vaittinen --- Revision history v2: => v3: - Fix title (space after iio:) v2: New patch --- drivers/iio/industrialio-trigger.c | 22 +++++++++++++++++++++- include/linux/iio/trigger.h | 1 + 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 784dc1e00310..c616297aa754 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -322,7 +322,7 @@ int iio_trigger_attach_poll_func(struct iio_trigger *trig, * this is the case if the IIO device and the trigger device share the * same parent device. */ - if (pf->indio_dev->dev.parent == trig->dev.parent) + if (iio_validate_own_trigger(pf->indio_dev, trig)) trig->attached_own_device = true; return ret; @@ -728,6 +728,26 @@ bool iio_trigger_using_own(struct iio_dev *indio_dev) } EXPORT_SYMBOL(iio_trigger_using_own); +/** + * iio_validate_own_trigger - Check if a trigger and IIO device belong to + * the same device + * @idev: the IIO device to check + * @trig: The IIO trigger to check + * + * This function can be used as the validate_trigger callback for triggers that + * can only be attached to their own device. + * + * Return: 0 if both the trigger and the IIO device belong to the same + * device, -EINVAL otherwise. + */ +int iio_validate_own_trigger(struct iio_dev *idev, struct iio_trigger *trig) +{ + if (idev->dev.parent != trig->dev.parent) + return -EINVAL; + return 0; +} +EXPORT_SYMBOL_GPL(iio_validate_own_trigger); + /** * iio_trigger_validate_own_device - Check if a trigger and IIO device belong to * the same device diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h index 51f52c5c6092..bce3b1788199 100644 --- a/include/linux/iio/trigger.h +++ b/include/linux/iio/trigger.h @@ -171,6 +171,7 @@ void iio_trigger_free(struct iio_trigger *trig); */ bool iio_trigger_using_own(struct iio_dev *indio_dev); +int iio_validate_own_trigger(struct iio_dev *idev, struct iio_trigger *trig); int iio_trigger_validate_own_device(struct iio_trigger *trig, struct iio_dev *indio_dev);