| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. |
| */ |
| |
| #include <linux/iio/common/ssp_sensors.h> |
| #include <linux/iio/iio.h> |
| #include <linux/iio/buffer.h> |
| #include <linux/iio/kfifo_buf.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include "../common/ssp_sensors/ssp_iio_sensor.h" |
| |
| #define SSP_CHANNEL_COUNT 3 |
| |
| #define SSP_ACCEL_NAME "ssp-accelerometer" |
| static const char ssp_accel_device_name[] = SSP_ACCEL_NAME; |
| |
| enum ssp_accel_3d_channel { |
| SSP_CHANNEL_SCAN_INDEX_X, |
| SSP_CHANNEL_SCAN_INDEX_Y, |
| SSP_CHANNEL_SCAN_INDEX_Z, |
| SSP_CHANNEL_SCAN_INDEX_TIME, |
| }; |
| |
| static int ssp_accel_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, int *val, |
| int *val2, long mask) |
| { |
| u32 t; |
| struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR); |
| ssp_convert_to_freq(t, val, val2); |
| return IIO_VAL_INT_PLUS_MICRO; |
| default: |
| break; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int ssp_accel_write_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, int val, |
| int val2, long mask) |
| { |
| int ret; |
| struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| ret = ssp_convert_to_time(val, val2); |
| ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret); |
| if (ret < 0) |
| dev_err(&indio_dev->dev, "accel sensor enable fail\n"); |
| |
| return ret; |
| default: |
| break; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static const struct iio_info ssp_accel_iio_info = { |
| .read_raw = &ssp_accel_read_raw, |
| .write_raw = &ssp_accel_write_raw, |
| }; |
| |
| static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, }; |
| |
| static const struct iio_chan_spec ssp_acc_channels[] = { |
| SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), |
| SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), |
| SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z), |
| SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME), |
| }; |
| |
| static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf, |
| int64_t timestamp) |
| { |
| return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE, |
| timestamp); |
| } |
| |
| static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = { |
| .postenable = &ssp_common_buffer_postenable, |
| .postdisable = &ssp_common_buffer_postdisable, |
| }; |
| |
| static int ssp_accel_probe(struct platform_device *pdev) |
| { |
| int ret; |
| struct iio_dev *indio_dev; |
| struct ssp_sensor_data *spd; |
| |
| indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd)); |
| if (!indio_dev) |
| return -ENOMEM; |
| |
| spd = iio_priv(indio_dev); |
| |
| spd->process_data = ssp_process_accel_data; |
| spd->type = SSP_ACCELEROMETER_SENSOR; |
| |
| indio_dev->name = ssp_accel_device_name; |
| indio_dev->info = &ssp_accel_iio_info; |
| indio_dev->channels = ssp_acc_channels; |
| indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels); |
| indio_dev->available_scan_masks = ssp_accel_scan_mask; |
| |
| ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev, |
| INDIO_BUFFER_SOFTWARE, |
| &ssp_accel_buffer_ops); |
| if (ret) |
| return ret; |
| |
| platform_set_drvdata(pdev, indio_dev); |
| |
| ret = devm_iio_device_register(&pdev->dev, indio_dev); |
| if (ret < 0) |
| return ret; |
| |
| /* ssp registering should be done after all iio setup */ |
| ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR); |
| |
| return 0; |
| } |
| |
| static struct platform_driver ssp_accel_driver = { |
| .driver = { |
| .name = SSP_ACCEL_NAME, |
| }, |
| .probe = ssp_accel_probe, |
| }; |
| |
| module_platform_driver(ssp_accel_driver); |
| |
| MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); |
| MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_IMPORT_NS(IIO_SSP_SENSORS); |