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427 lines
12 KiB
427 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* HID Sensors Driver |
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* Copyright (c) 2013, Intel Corporation. |
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*/ |
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#include <linux/device.h> |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/interrupt.h> |
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#include <linux/irq.h> |
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#include <linux/slab.h> |
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#include <linux/delay.h> |
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#include <linux/hid-sensor-hub.h> |
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#include <linux/iio/iio.h> |
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#include <linux/iio/sysfs.h> |
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#include <linux/iio/buffer.h> |
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#include "../common/hid-sensors/hid-sensor-trigger.h" |
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enum incl_3d_channel { |
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CHANNEL_SCAN_INDEX_X, |
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CHANNEL_SCAN_INDEX_Y, |
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CHANNEL_SCAN_INDEX_Z, |
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INCLI_3D_CHANNEL_MAX, |
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}; |
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#define CHANNEL_SCAN_INDEX_TIMESTAMP INCLI_3D_CHANNEL_MAX |
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struct incl_3d_state { |
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struct hid_sensor_hub_callbacks callbacks; |
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struct hid_sensor_common common_attributes; |
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struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX]; |
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struct { |
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u32 incl_val[INCLI_3D_CHANNEL_MAX]; |
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u64 timestamp __aligned(8); |
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} scan; |
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int scale_pre_decml; |
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int scale_post_decml; |
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int scale_precision; |
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int value_offset; |
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s64 timestamp; |
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}; |
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static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = { |
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HID_USAGE_SENSOR_ORIENT_TILT_X, |
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HID_USAGE_SENSOR_ORIENT_TILT_Y, |
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HID_USAGE_SENSOR_ORIENT_TILT_Z |
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}; |
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static const u32 incl_3d_sensitivity_addresses[] = { |
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HID_USAGE_SENSOR_DATA_ORIENTATION, |
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HID_USAGE_SENSOR_ORIENT_TILT, |
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}; |
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/* Channel definitions */ |
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static const struct iio_chan_spec incl_3d_channels[] = { |
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{ |
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.type = IIO_INCLI, |
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.modified = 1, |
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.channel2 = IIO_MOD_X, |
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
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BIT(IIO_CHAN_INFO_SCALE) | |
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BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
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BIT(IIO_CHAN_INFO_HYSTERESIS), |
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.scan_index = CHANNEL_SCAN_INDEX_X, |
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}, { |
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.type = IIO_INCLI, |
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.modified = 1, |
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.channel2 = IIO_MOD_Y, |
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
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BIT(IIO_CHAN_INFO_SCALE) | |
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BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
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BIT(IIO_CHAN_INFO_HYSTERESIS), |
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.scan_index = CHANNEL_SCAN_INDEX_Y, |
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}, { |
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.type = IIO_INCLI, |
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.modified = 1, |
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.channel2 = IIO_MOD_Z, |
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
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BIT(IIO_CHAN_INFO_SCALE) | |
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BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
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BIT(IIO_CHAN_INFO_HYSTERESIS), |
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.scan_index = CHANNEL_SCAN_INDEX_Z, |
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}, |
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IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP), |
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}; |
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/* Adjust channel real bits based on report descriptor */ |
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static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan, |
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int size) |
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{ |
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chan->scan_type.sign = 's'; |
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/* Real storage bits will change based on the report desc. */ |
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chan->scan_type.realbits = size * 8; |
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/* Maximum size of a sample to capture is u32 */ |
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chan->scan_type.storagebits = sizeof(u32) * 8; |
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} |
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/* Channel read_raw handler */ |
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static int incl_3d_read_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int *val, int *val2, |
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long mask) |
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{ |
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struct incl_3d_state *incl_state = iio_priv(indio_dev); |
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int report_id = -1; |
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u32 address; |
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int ret_type; |
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s32 min; |
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*val = 0; |
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*val2 = 0; |
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switch (mask) { |
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case IIO_CHAN_INFO_RAW: |
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hid_sensor_power_state(&incl_state->common_attributes, true); |
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report_id = incl_state->incl[chan->scan_index].report_id; |
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min = incl_state->incl[chan->scan_index].logical_minimum; |
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address = incl_3d_addresses[chan->scan_index]; |
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if (report_id >= 0) |
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*val = sensor_hub_input_attr_get_raw_value( |
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incl_state->common_attributes.hsdev, |
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HID_USAGE_SENSOR_INCLINOMETER_3D, address, |
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report_id, |
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SENSOR_HUB_SYNC, |
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min < 0); |
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else { |
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hid_sensor_power_state(&incl_state->common_attributes, |
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false); |
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return -EINVAL; |
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} |
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hid_sensor_power_state(&incl_state->common_attributes, false); |
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ret_type = IIO_VAL_INT; |
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break; |
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case IIO_CHAN_INFO_SCALE: |
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*val = incl_state->scale_pre_decml; |
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*val2 = incl_state->scale_post_decml; |
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ret_type = incl_state->scale_precision; |
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break; |
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case IIO_CHAN_INFO_OFFSET: |
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*val = incl_state->value_offset; |
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ret_type = IIO_VAL_INT; |
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break; |
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case IIO_CHAN_INFO_SAMP_FREQ: |
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ret_type = hid_sensor_read_samp_freq_value( |
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&incl_state->common_attributes, val, val2); |
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break; |
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case IIO_CHAN_INFO_HYSTERESIS: |
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ret_type = hid_sensor_read_raw_hyst_value( |
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&incl_state->common_attributes, val, val2); |
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break; |
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default: |
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ret_type = -EINVAL; |
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break; |
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} |
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return ret_type; |
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} |
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/* Channel write_raw handler */ |
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static int incl_3d_write_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int val, |
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int val2, |
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long mask) |
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{ |
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struct incl_3d_state *incl_state = iio_priv(indio_dev); |
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int ret; |
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switch (mask) { |
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case IIO_CHAN_INFO_SAMP_FREQ: |
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ret = hid_sensor_write_samp_freq_value( |
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&incl_state->common_attributes, val, val2); |
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break; |
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case IIO_CHAN_INFO_HYSTERESIS: |
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ret = hid_sensor_write_raw_hyst_value( |
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&incl_state->common_attributes, val, val2); |
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break; |
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default: |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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static const struct iio_info incl_3d_info = { |
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.read_raw = &incl_3d_read_raw, |
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.write_raw = &incl_3d_write_raw, |
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}; |
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/* Callback handler to send event after all samples are received and captured */ |
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static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev, |
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unsigned usage_id, |
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void *priv) |
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{ |
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struct iio_dev *indio_dev = platform_get_drvdata(priv); |
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struct incl_3d_state *incl_state = iio_priv(indio_dev); |
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dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n"); |
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if (atomic_read(&incl_state->common_attributes.data_ready)) { |
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if (!incl_state->timestamp) |
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incl_state->timestamp = iio_get_time_ns(indio_dev); |
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iio_push_to_buffers_with_timestamp(indio_dev, |
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&incl_state->scan, |
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incl_state->timestamp); |
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incl_state->timestamp = 0; |
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} |
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return 0; |
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} |
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/* Capture samples in local storage */ |
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static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev, |
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unsigned usage_id, |
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size_t raw_len, char *raw_data, |
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void *priv) |
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{ |
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struct iio_dev *indio_dev = platform_get_drvdata(priv); |
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struct incl_3d_state *incl_state = iio_priv(indio_dev); |
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int ret = 0; |
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switch (usage_id) { |
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case HID_USAGE_SENSOR_ORIENT_TILT_X: |
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incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data; |
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break; |
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case HID_USAGE_SENSOR_ORIENT_TILT_Y: |
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incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data; |
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break; |
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case HID_USAGE_SENSOR_ORIENT_TILT_Z: |
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incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data; |
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break; |
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case HID_USAGE_SENSOR_TIME_TIMESTAMP: |
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incl_state->timestamp = |
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hid_sensor_convert_timestamp(&incl_state->common_attributes, |
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*(s64 *)raw_data); |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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return ret; |
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} |
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/* Parse report which is specific to an usage id*/ |
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static int incl_3d_parse_report(struct platform_device *pdev, |
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struct hid_sensor_hub_device *hsdev, |
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struct iio_chan_spec *channels, |
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unsigned usage_id, |
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struct incl_3d_state *st) |
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{ |
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int ret; |
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ret = sensor_hub_input_get_attribute_info(hsdev, |
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HID_INPUT_REPORT, |
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usage_id, |
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HID_USAGE_SENSOR_ORIENT_TILT_X, |
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&st->incl[CHANNEL_SCAN_INDEX_X]); |
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if (ret) |
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return ret; |
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incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X], |
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st->incl[CHANNEL_SCAN_INDEX_X].size); |
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ret = sensor_hub_input_get_attribute_info(hsdev, |
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HID_INPUT_REPORT, |
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usage_id, |
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HID_USAGE_SENSOR_ORIENT_TILT_Y, |
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&st->incl[CHANNEL_SCAN_INDEX_Y]); |
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if (ret) |
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return ret; |
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incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y], |
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st->incl[CHANNEL_SCAN_INDEX_Y].size); |
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ret = sensor_hub_input_get_attribute_info(hsdev, |
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HID_INPUT_REPORT, |
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usage_id, |
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HID_USAGE_SENSOR_ORIENT_TILT_Z, |
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&st->incl[CHANNEL_SCAN_INDEX_Z]); |
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if (ret) |
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return ret; |
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incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z], |
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st->incl[CHANNEL_SCAN_INDEX_Z].size); |
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dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n", |
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st->incl[0].index, |
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st->incl[0].report_id, |
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st->incl[1].index, st->incl[1].report_id, |
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st->incl[2].index, st->incl[2].report_id); |
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st->scale_precision = hid_sensor_format_scale( |
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HID_USAGE_SENSOR_INCLINOMETER_3D, |
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&st->incl[CHANNEL_SCAN_INDEX_X], |
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&st->scale_pre_decml, &st->scale_post_decml); |
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return ret; |
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} |
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/* Function to initialize the processing for usage id */ |
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static int hid_incl_3d_probe(struct platform_device *pdev) |
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{ |
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int ret; |
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static char *name = "incli_3d"; |
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struct iio_dev *indio_dev; |
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struct incl_3d_state *incl_state; |
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struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
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indio_dev = devm_iio_device_alloc(&pdev->dev, |
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sizeof(struct incl_3d_state)); |
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if (indio_dev == NULL) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, indio_dev); |
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incl_state = iio_priv(indio_dev); |
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incl_state->common_attributes.hsdev = hsdev; |
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incl_state->common_attributes.pdev = pdev; |
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ret = hid_sensor_parse_common_attributes(hsdev, |
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HID_USAGE_SENSOR_INCLINOMETER_3D, |
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&incl_state->common_attributes, |
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incl_3d_sensitivity_addresses, |
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ARRAY_SIZE(incl_3d_sensitivity_addresses)); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to setup common attributes\n"); |
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return ret; |
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} |
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indio_dev->channels = kmemdup(incl_3d_channels, |
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sizeof(incl_3d_channels), GFP_KERNEL); |
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if (!indio_dev->channels) { |
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dev_err(&pdev->dev, "failed to duplicate channels\n"); |
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return -ENOMEM; |
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} |
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ret = incl_3d_parse_report(pdev, hsdev, |
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(struct iio_chan_spec *)indio_dev->channels, |
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HID_USAGE_SENSOR_INCLINOMETER_3D, |
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incl_state); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to setup attributes\n"); |
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goto error_free_dev_mem; |
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} |
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indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels); |
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indio_dev->info = &incl_3d_info; |
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indio_dev->name = name; |
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indio_dev->modes = INDIO_DIRECT_MODE; |
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atomic_set(&incl_state->common_attributes.data_ready, 0); |
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ret = hid_sensor_setup_trigger(indio_dev, name, |
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&incl_state->common_attributes); |
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if (ret) { |
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dev_err(&pdev->dev, "trigger setup failed\n"); |
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goto error_free_dev_mem; |
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} |
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ret = iio_device_register(indio_dev); |
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if (ret) { |
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dev_err(&pdev->dev, "device register failed\n"); |
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goto error_remove_trigger; |
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} |
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incl_state->callbacks.send_event = incl_3d_proc_event; |
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incl_state->callbacks.capture_sample = incl_3d_capture_sample; |
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incl_state->callbacks.pdev = pdev; |
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ret = sensor_hub_register_callback(hsdev, |
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HID_USAGE_SENSOR_INCLINOMETER_3D, |
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&incl_state->callbacks); |
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if (ret) { |
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dev_err(&pdev->dev, "callback reg failed\n"); |
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goto error_iio_unreg; |
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} |
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return 0; |
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error_iio_unreg: |
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iio_device_unregister(indio_dev); |
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error_remove_trigger: |
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hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes); |
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error_free_dev_mem: |
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kfree(indio_dev->channels); |
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return ret; |
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} |
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/* Function to deinitialize the processing for usage id */ |
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static int hid_incl_3d_remove(struct platform_device *pdev) |
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{ |
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struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
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struct iio_dev *indio_dev = platform_get_drvdata(pdev); |
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struct incl_3d_state *incl_state = iio_priv(indio_dev); |
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sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D); |
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iio_device_unregister(indio_dev); |
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hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes); |
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kfree(indio_dev->channels); |
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return 0; |
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} |
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static const struct platform_device_id hid_incl_3d_ids[] = { |
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{ |
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/* Format: HID-SENSOR-usage_id_in_hex_lowercase */ |
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.name = "HID-SENSOR-200086", |
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}, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids); |
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static struct platform_driver hid_incl_3d_platform_driver = { |
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.id_table = hid_incl_3d_ids, |
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.driver = { |
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.name = KBUILD_MODNAME, |
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.pm = &hid_sensor_pm_ops, |
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}, |
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.probe = hid_incl_3d_probe, |
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.remove = hid_incl_3d_remove, |
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}; |
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module_platform_driver(hid_incl_3d_platform_driver); |
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MODULE_DESCRIPTION("HID Sensor Inclinometer 3D"); |
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MODULE_AUTHOR("Srinivas Pandruvada <[email protected]>"); |
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MODULE_LICENSE("GPL");
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