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iio: adc: ad_sigma_delta: introduct devm_ad_sd_setup_buffer_and_trigger()
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 <aardelean@deviqon.com> Link: https://lore.kernel.org/r/20210513120752.90074-6-aardelean@deviqon.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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e6148fe791
commit
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2 changed files with 63 additions and 0 deletions
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@ -513,6 +513,46 @@ static int ad_sd_probe_trigger(struct iio_dev *indio_dev)
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return ret;
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}
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static int devm_ad_sd_probe_trigger(struct device *dev, struct iio_dev *indio_dev)
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{
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struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev);
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int ret;
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if (dev != &sigma_delta->spi->dev) {
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dev_err(dev, "Trigger parent should be '%s', got '%s'\n",
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dev_name(dev), dev_name(&sigma_delta->spi->dev));
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return -EFAULT;
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}
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sigma_delta->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
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iio_device_id(indio_dev));
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if (sigma_delta->trig == NULL)
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return -ENOMEM;
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sigma_delta->trig->ops = &ad_sd_trigger_ops;
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init_completion(&sigma_delta->completion);
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sigma_delta->irq_dis = true;
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ret = devm_request_irq(dev, sigma_delta->spi->irq,
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ad_sd_data_rdy_trig_poll,
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sigma_delta->info->irq_flags | IRQF_NO_AUTOEN,
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indio_dev->name,
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sigma_delta);
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if (ret)
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return ret;
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iio_trigger_set_drvdata(sigma_delta->trig, sigma_delta);
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ret = devm_iio_trigger_register(dev, sigma_delta->trig);
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if (ret)
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return ret;
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/* select default trigger */
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indio_dev->trig = iio_trigger_get(sigma_delta->trig);
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return 0;
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}
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static void ad_sd_remove_trigger(struct iio_dev *indio_dev)
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{
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struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev);
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@ -556,6 +596,26 @@ void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev)
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}
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EXPORT_SYMBOL_GPL(ad_sd_cleanup_buffer_and_trigger);
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/**
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* devm_ad_sd_setup_buffer_and_trigger() - Device-managed buffer & trigger setup
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* @dev: Device object to which to bind the life-time of the resources attached
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* @indio_dev: The IIO device
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*/
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int devm_ad_sd_setup_buffer_and_trigger(struct device *dev, struct iio_dev *indio_dev)
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{
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int ret;
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ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
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&iio_pollfunc_store_time,
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&ad_sd_trigger_handler,
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&ad_sd_buffer_setup_ops);
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if (ret)
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return ret;
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return devm_ad_sd_probe_trigger(dev, indio_dev);
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}
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EXPORT_SYMBOL_GPL(devm_ad_sd_setup_buffer_and_trigger);
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/**
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* ad_sd_init() - Initializes a ad_sigma_delta struct
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* @sigma_delta: The ad_sigma_delta device
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@ -26,6 +26,7 @@ struct ad_sd_calib_data {
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};
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struct ad_sigma_delta;
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struct device;
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struct iio_dev;
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/**
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@ -135,6 +136,8 @@ int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev,
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int ad_sd_setup_buffer_and_trigger(struct iio_dev *indio_dev);
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void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev);
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int devm_ad_sd_setup_buffer_and_trigger(struct device *dev, struct iio_dev *indio_dev);
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int ad_sd_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig);
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#endif
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