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144 lines
3.6 KiB
144 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. |
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*/ |
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#include <linux/iio/common/ssp_sensors.h> |
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#include <linux/iio/iio.h> |
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#include <linux/iio/buffer.h> |
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#include <linux/iio/kfifo_buf.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/slab.h> |
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#include "../common/ssp_sensors/ssp_iio_sensor.h" |
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#define SSP_CHANNEL_COUNT 3 |
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#define SSP_GYROSCOPE_NAME "ssp-gyroscope" |
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static const char ssp_gyro_name[] = SSP_GYROSCOPE_NAME; |
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enum ssp_gyro_3d_channel { |
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SSP_CHANNEL_SCAN_INDEX_X, |
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SSP_CHANNEL_SCAN_INDEX_Y, |
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SSP_CHANNEL_SCAN_INDEX_Z, |
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SSP_CHANNEL_SCAN_INDEX_TIME, |
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}; |
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static int ssp_gyro_read_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, int *val, |
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int *val2, long mask) |
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{ |
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u32 t; |
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struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
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switch (mask) { |
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case IIO_CHAN_INFO_SAMP_FREQ: |
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t = ssp_get_sensor_delay(data, SSP_GYROSCOPE_SENSOR); |
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ssp_convert_to_freq(t, val, val2); |
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return IIO_VAL_INT_PLUS_MICRO; |
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default: |
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break; |
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} |
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return -EINVAL; |
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} |
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static int ssp_gyro_write_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, int val, |
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int val2, long mask) |
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{ |
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int ret; |
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struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
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switch (mask) { |
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case IIO_CHAN_INFO_SAMP_FREQ: |
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ret = ssp_convert_to_time(val, val2); |
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ret = ssp_change_delay(data, SSP_GYROSCOPE_SENSOR, ret); |
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if (ret < 0) |
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dev_err(&indio_dev->dev, "gyro sensor enable fail\n"); |
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return ret; |
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default: |
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break; |
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} |
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return -EINVAL; |
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} |
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static const struct iio_info ssp_gyro_iio_info = { |
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.read_raw = &ssp_gyro_read_raw, |
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.write_raw = &ssp_gyro_write_raw, |
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}; |
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static const unsigned long ssp_gyro_scan_mask[] = { 0x07, 0, }; |
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static const struct iio_chan_spec ssp_gyro_channels[] = { |
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SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), |
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SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), |
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SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z), |
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SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME), |
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}; |
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static int ssp_process_gyro_data(struct iio_dev *indio_dev, void *buf, |
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int64_t timestamp) |
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{ |
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return ssp_common_process_data(indio_dev, buf, SSP_GYROSCOPE_SIZE, |
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timestamp); |
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} |
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static const struct iio_buffer_setup_ops ssp_gyro_buffer_ops = { |
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.postenable = &ssp_common_buffer_postenable, |
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.postdisable = &ssp_common_buffer_postdisable, |
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}; |
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static int ssp_gyro_probe(struct platform_device *pdev) |
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{ |
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int ret; |
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struct iio_dev *indio_dev; |
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struct ssp_sensor_data *spd; |
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indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd)); |
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if (!indio_dev) |
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return -ENOMEM; |
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spd = iio_priv(indio_dev); |
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spd->process_data = ssp_process_gyro_data; |
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spd->type = SSP_GYROSCOPE_SENSOR; |
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indio_dev->name = ssp_gyro_name; |
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indio_dev->info = &ssp_gyro_iio_info; |
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indio_dev->channels = ssp_gyro_channels; |
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indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels); |
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indio_dev->available_scan_masks = ssp_gyro_scan_mask; |
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ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev, |
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INDIO_BUFFER_SOFTWARE, |
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&ssp_gyro_buffer_ops); |
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if (ret) |
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return ret; |
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platform_set_drvdata(pdev, indio_dev); |
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ret = devm_iio_device_register(&pdev->dev, indio_dev); |
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if (ret < 0) |
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return ret; |
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/* ssp registering should be done after all iio setup */ |
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ssp_register_consumer(indio_dev, SSP_GYROSCOPE_SENSOR); |
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return 0; |
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} |
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static struct platform_driver ssp_gyro_driver = { |
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.driver = { |
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.name = SSP_GYROSCOPE_NAME, |
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}, |
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.probe = ssp_gyro_probe, |
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}; |
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module_platform_driver(ssp_gyro_driver); |
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MODULE_AUTHOR("Karol Wrona <[email protected]>"); |
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MODULE_DESCRIPTION("Samsung sensorhub gyroscopes driver"); |
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MODULE_LICENSE("GPL");
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