Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/iio/common/ssp_sensors.h> |
| 7 | #include <linux/iio/iio.h> |
Jonathan Cameron | 8abd5ba | 2017-01-02 19:28:30 +0000 | [diff] [blame] | 8 | #include <linux/iio/buffer.h> |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 9 | #include <linux/iio/kfifo_buf.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/platform_device.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include "../common/ssp_sensors/ssp_iio_sensor.h" |
| 14 | |
| 15 | #define SSP_CHANNEL_COUNT 3 |
| 16 | |
| 17 | #define SSP_ACCEL_NAME "ssp-accelerometer" |
| 18 | static const char ssp_accel_device_name[] = SSP_ACCEL_NAME; |
| 19 | |
| 20 | enum ssp_accel_3d_channel { |
| 21 | SSP_CHANNEL_SCAN_INDEX_X, |
| 22 | SSP_CHANNEL_SCAN_INDEX_Y, |
| 23 | SSP_CHANNEL_SCAN_INDEX_Z, |
| 24 | SSP_CHANNEL_SCAN_INDEX_TIME, |
| 25 | }; |
| 26 | |
| 27 | static int ssp_accel_read_raw(struct iio_dev *indio_dev, |
| 28 | struct iio_chan_spec const *chan, int *val, |
| 29 | int *val2, long mask) |
| 30 | { |
| 31 | u32 t; |
| 32 | struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
| 33 | |
| 34 | switch (mask) { |
| 35 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 36 | t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR); |
| 37 | ssp_convert_to_freq(t, val, val2); |
| 38 | return IIO_VAL_INT_PLUS_MICRO; |
| 39 | default: |
| 40 | break; |
| 41 | } |
| 42 | |
| 43 | return -EINVAL; |
| 44 | } |
| 45 | |
| 46 | static int ssp_accel_write_raw(struct iio_dev *indio_dev, |
| 47 | struct iio_chan_spec const *chan, int val, |
| 48 | int val2, long mask) |
| 49 | { |
| 50 | int ret; |
| 51 | struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
| 52 | |
| 53 | switch (mask) { |
| 54 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 55 | ret = ssp_convert_to_time(val, val2); |
| 56 | ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret); |
| 57 | if (ret < 0) |
| 58 | dev_err(&indio_dev->dev, "accel sensor enable fail\n"); |
| 59 | |
| 60 | return ret; |
| 61 | default: |
| 62 | break; |
| 63 | } |
| 64 | |
| 65 | return -EINVAL; |
| 66 | } |
| 67 | |
Julia Lawall | 7504dfc | 2016-09-16 12:55:24 +0200 | [diff] [blame] | 68 | static const struct iio_info ssp_accel_iio_info = { |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 69 | .read_raw = &ssp_accel_read_raw, |
| 70 | .write_raw = &ssp_accel_write_raw, |
| 71 | }; |
| 72 | |
| 73 | static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, }; |
| 74 | |
| 75 | static const struct iio_chan_spec ssp_acc_channels[] = { |
| 76 | SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), |
| 77 | SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), |
| 78 | SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z), |
| 79 | SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME), |
| 80 | }; |
| 81 | |
| 82 | static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf, |
| 83 | int64_t timestamp) |
| 84 | { |
| 85 | return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE, |
| 86 | timestamp); |
| 87 | } |
| 88 | |
| 89 | static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = { |
| 90 | .postenable = &ssp_common_buffer_postenable, |
| 91 | .postdisable = &ssp_common_buffer_postdisable, |
| 92 | }; |
| 93 | |
| 94 | static int ssp_accel_probe(struct platform_device *pdev) |
| 95 | { |
| 96 | int ret; |
| 97 | struct iio_dev *indio_dev; |
| 98 | struct ssp_sensor_data *spd; |
| 99 | struct iio_buffer *buffer; |
| 100 | |
| 101 | indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd)); |
| 102 | if (!indio_dev) |
| 103 | return -ENOMEM; |
| 104 | |
| 105 | spd = iio_priv(indio_dev); |
| 106 | |
| 107 | spd->process_data = ssp_process_accel_data; |
| 108 | spd->type = SSP_ACCELEROMETER_SENSOR; |
| 109 | |
| 110 | indio_dev->name = ssp_accel_device_name; |
| 111 | indio_dev->dev.parent = &pdev->dev; |
| 112 | indio_dev->dev.of_node = pdev->dev.of_node; |
| 113 | indio_dev->info = &ssp_accel_iio_info; |
| 114 | indio_dev->modes = INDIO_BUFFER_SOFTWARE; |
| 115 | indio_dev->channels = ssp_acc_channels; |
| 116 | indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels); |
| 117 | indio_dev->available_scan_masks = ssp_accel_scan_mask; |
| 118 | |
| 119 | buffer = devm_iio_kfifo_allocate(&pdev->dev); |
| 120 | if (!buffer) |
| 121 | return -ENOMEM; |
| 122 | |
| 123 | iio_device_attach_buffer(indio_dev, buffer); |
| 124 | |
| 125 | indio_dev->setup_ops = &ssp_accel_buffer_ops; |
| 126 | |
| 127 | platform_set_drvdata(pdev, indio_dev); |
| 128 | |
Wei Yongjun | fa4c115 | 2017-01-22 16:36:12 +0000 | [diff] [blame] | 129 | ret = devm_iio_device_register(&pdev->dev, indio_dev); |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 130 | if (ret < 0) |
| 131 | return ret; |
| 132 | |
| 133 | /* ssp registering should be done after all iio setup */ |
| 134 | ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR); |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 139 | static struct platform_driver ssp_accel_driver = { |
| 140 | .driver = { |
| 141 | .name = SSP_ACCEL_NAME, |
| 142 | }, |
| 143 | .probe = ssp_accel_probe, |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 144 | }; |
| 145 | |
| 146 | module_platform_driver(ssp_accel_driver); |
| 147 | |
| 148 | MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); |
| 149 | MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver"); |
| 150 | MODULE_LICENSE("GPL"); |