linux-kernel - Re: [PATCH v3 5/5] iio: common: ssp_sensors: Add sensorhub gyroscope sensor

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Date:	Wed, 17 Dec 2014 23:20:38 +0100
From:	Hartmut Knaack <knaack.h@....de>
To:	Karol Wrona <k.wrona@...sung.com>,
	Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
CC:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Karol Wrona <wrona.vy@...il.com>
Subject: Re: [PATCH v3 5/5] iio: common: ssp_sensors: Add sensorhub
 gyroscope sensor

Karol Wrona schrieb am 05.12.2014 um 20:54:
> This patch adds gyroscope iio driver which uses sensorhub as data
> provider.
> 
This one has got a more serious issue.
> Change-Id: Ia16bc92159d062a29957de8e62ea3fefdcd7985a
> Signed-off-by: Karol Wrona <k.wrona@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>  drivers/iio/gyro/Makefile          |    2 +
>  drivers/iio/gyro/ssp_gyro_sensor.c |  202 ++++++++++++++++++++++++++++++++++++
>  2 files changed, 204 insertions(+)
>  create mode 100644 drivers/iio/gyro/ssp_gyro_sensor.c
> 

> +static int ssp_gyro_probe(struct platform_device *pdev)
> +{
> +	int ret;
> +	struct iio_dev *indio_dev;
> +	struct ssp_sensor_data *spd;
> +
> +	indio_dev = iio_device_alloc(sizeof(*spd));
Need to use devm_iio_device_alloc(), since iio_device_free() has been dropped.
> +	if (!indio_dev)
> +		return -ENOMEM;
> +
> +	spd = iio_priv(indio_dev);
> +
> +	spd->process_data = ssp_process_gyro_data;
> +	spd->type = SSP_GYROSCOPE_SENSOR;
> +
> +	indio_dev->name = ssp_gyro_name;
> +	indio_dev->dev.parent = &pdev->dev;
> +	indio_dev->info = &ssp_gyro_iio_info;
> +	indio_dev->modes = INDIO_BUFFER_HARDWARE;
> +	indio_dev->channels = ssp_gyro_channels;
> +	indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels);
> +
> +	ret = ssp_common_setup_buffer(indio_dev, &ssp_gyro_buffer_ops);
> +	if (ret < 0) {
> +		dev_err(&pdev->dev, "Buffer setup fail\n");
> +		return ret;
> +	}
> +
> +	platform_set_drvdata(pdev, indio_dev);
> +
> +	ret = iio_device_register(indio_dev);
> +	if (ret < 0) {
> +		iio_buffer_unregister(indio_dev);
> +		iio_kfifo_free(indio_dev->buffer);
> +		return ret;
> +	};
> +
> +	/* similar to accel */
> +	ssp_register_consumer(indio_dev, SSP_GYROSCOPE_SENSOR);
> +
> +	return 0;
> +}
> +
> +static int ssp_gyro_remove(struct platform_device *pdev)
> +{
> +	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> +
> +	iio_device_unregister(indio_dev);
> +	iio_buffer_unregister(indio_dev);
> +	iio_kfifo_free(indio_dev->buffer);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id ssp_gyro_id_table[] = {
> +	{
> +		.compatible = "samsung,mpu6500-gyro",
> +	},
> +	{},
> +};
> +
> +static struct platform_driver ssp_gyro_driver = {
> +	.driver = {
> +		.owner = THIS_MODULE,
> +		.name = SSP_GYROSCOPE_NAME,
> +		.of_match_table = ssp_gyro_id_table,
> +	},
> +	.probe = ssp_gyro_probe,
> +	.remove = ssp_gyro_remove,
> +};
> +
> +module_platform_driver(ssp_gyro_driver);
> +
> +MODULE_AUTHOR("Karol Wrona <k.wrona@...sung.com>");
> +MODULE_DESCRIPTION("Samsung sensorhub gyroscopes driver");
> +MODULE_LICENSE("GPL");
> 

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