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([5.2.193.191]) by smtp.gmail.com with ESMTPSA id ga28sm1717809ejc.20.2021.05.13.05.08.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 May 2021 05:08:03 -0700 (PDT) From: Alexandru Ardelean To: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jic23@kernel.org, Jonathan.Cameron@huawei.com, alexandru.tachici@analog.com, linux@deviqon.com, Alexandru Ardelean Subject: [PATCH v4 05/12] iio: adc: ad_sigma_delta: introduct devm_ad_sd_setup_buffer_and_trigger() Date: Thu, 13 May 2021 15:07:45 +0300 Message-Id: <20210513120752.90074-6-aardelean@deviqon.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210513120752.90074-1-aardelean@deviqon.com> References: <20210513120752.90074-1-aardelean@deviqon.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a version of ad_sd_setup_buffer_and_trigger() with all underlying functions (that are used) being replaced with their device-managed variants. One thing to take care here is with {devm_}iio_trigger_alloc(), where both functions take a parent-device object as the first parameter. To make sure nothing quirky is happening, the devm_ad_sd_probe_trigger() function is checking that the provided 'dev' reference is the same as the one stored on the 'struct ad_sigma_delta' driver data. Signed-off-by: Alexandru Ardelean --- drivers/iio/adc/ad_sigma_delta.c | 60 ++++++++++++++++++++++++++ include/linux/iio/adc/ad_sigma_delta.h | 3 ++ 2 files changed, 63 insertions(+) diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c index 69b979331ccd..d5801a47be07 100644 --- a/drivers/iio/adc/ad_sigma_delta.c +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -513,6 +513,46 @@ static int ad_sd_probe_trigger(struct iio_dev *indio_dev) return ret; } +static int devm_ad_sd_probe_trigger(struct device *dev, struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + int ret; + + if (dev != &sigma_delta->spi->dev) { + dev_err(dev, "Trigger parent should be '%s', got '%s'\n", + dev_name(dev), dev_name(&sigma_delta->spi->dev)); + return -EFAULT; + } + + sigma_delta->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, + iio_device_id(indio_dev)); + if (sigma_delta->trig == NULL) + return -ENOMEM; + + sigma_delta->trig->ops = &ad_sd_trigger_ops; + init_completion(&sigma_delta->completion); + + sigma_delta->irq_dis = true; + ret = devm_request_irq(dev, sigma_delta->spi->irq, + ad_sd_data_rdy_trig_poll, + sigma_delta->info->irq_flags | IRQF_NO_AUTOEN, + indio_dev->name, + sigma_delta); + if (ret) + return ret; + + iio_trigger_set_drvdata(sigma_delta->trig, sigma_delta); + + ret = devm_iio_trigger_register(dev, sigma_delta->trig); + if (ret) + return ret; + + /* select default trigger */ + indio_dev->trig = iio_trigger_get(sigma_delta->trig); + + return 0; +} + static void ad_sd_remove_trigger(struct iio_dev *indio_dev) { struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); @@ -556,6 +596,26 @@ void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev) } EXPORT_SYMBOL_GPL(ad_sd_cleanup_buffer_and_trigger); +/** + * devm_ad_sd_setup_buffer_and_trigger() - Device-managed buffer & trigger setup + * @dev: Device object to which to bind the life-time of the resources attached + * @indio_dev: The IIO device + */ +int devm_ad_sd_setup_buffer_and_trigger(struct device *dev, struct iio_dev *indio_dev) +{ + int ret; + + ret = devm_iio_triggered_buffer_setup(dev, indio_dev, + &iio_pollfunc_store_time, + &ad_sd_trigger_handler, + &ad_sd_buffer_setup_ops); + if (ret) + return ret; + + return devm_ad_sd_probe_trigger(dev, indio_dev); +} +EXPORT_SYMBOL_GPL(devm_ad_sd_setup_buffer_and_trigger); + /** * ad_sd_init() - Initializes a ad_sigma_delta struct * @sigma_delta: The ad_sigma_delta device diff --git a/include/linux/iio/adc/ad_sigma_delta.h b/include/linux/iio/adc/ad_sigma_delta.h index 7199280d89ca..be81ad39fb7a 100644 --- a/include/linux/iio/adc/ad_sigma_delta.h +++ b/include/linux/iio/adc/ad_sigma_delta.h @@ -26,6 +26,7 @@ struct ad_sd_calib_data { }; struct ad_sigma_delta; +struct device; struct iio_dev; /** @@ -135,6 +136,8 @@ int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev, int ad_sd_setup_buffer_and_trigger(struct iio_dev *indio_dev); void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev); +int devm_ad_sd_setup_buffer_and_trigger(struct device *dev, struct iio_dev *indio_dev); + int ad_sd_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig); #endif -- 2.31.1