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148 lines
3.8 KiB
148 lines
3.8 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_ACCEL_NAME "ssp-accelerometer" |
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static const char ssp_accel_device_name[] = SSP_ACCEL_NAME; |
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enum ssp_accel_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_accel_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_ACCELEROMETER_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_accel_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_ACCELEROMETER_SENSOR, ret); |
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if (ret < 0) |
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dev_err(&indio_dev->dev, "accel 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_accel_iio_info = { |
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.read_raw = &ssp_accel_read_raw, |
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.write_raw = &ssp_accel_write_raw, |
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}; |
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static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, }; |
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static const struct iio_chan_spec ssp_acc_channels[] = { |
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SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), |
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SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), |
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SSP_CHANNEL_AG(IIO_ACCEL, 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_accel_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_ACCELEROMETER_SIZE, |
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timestamp); |
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} |
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static const struct iio_buffer_setup_ops ssp_accel_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_accel_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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struct iio_buffer *buffer; |
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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_accel_data; |
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spd->type = SSP_ACCELEROMETER_SENSOR; |
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indio_dev->name = ssp_accel_device_name; |
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indio_dev->info = &ssp_accel_iio_info; |
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indio_dev->modes = INDIO_BUFFER_SOFTWARE; |
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indio_dev->channels = ssp_acc_channels; |
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indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels); |
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indio_dev->available_scan_masks = ssp_accel_scan_mask; |
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buffer = devm_iio_kfifo_allocate(&pdev->dev); |
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if (!buffer) |
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return -ENOMEM; |
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iio_device_attach_buffer(indio_dev, buffer); |
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indio_dev->setup_ops = &ssp_accel_buffer_ops; |
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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_ACCELEROMETER_SENSOR); |
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return 0; |
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} |
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static struct platform_driver ssp_accel_driver = { |
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.driver = { |
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.name = SSP_ACCEL_NAME, |
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}, |
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.probe = ssp_accel_probe, |
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}; |
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module_platform_driver(ssp_accel_driver); |
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MODULE_AUTHOR("Karol Wrona <[email protected]>"); |
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MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver"); |
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MODULE_LICENSE("GPL");
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