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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HID Sensors Driver
4 * Copyright (c) 2014, Intel Corporation.
5 */
6#include <linux/device.h>
7#include <linux/platform_device.h>
8#include <linux/module.h>
9#include <linux/interrupt.h>
10#include <linux/irq.h>
11#include <linux/slab.h>
12#include <linux/delay.h>
13#include <linux/hid-sensor-hub.h>
14#include <linux/iio/iio.h>
15#include <linux/iio/sysfs.h>
16#include <linux/iio/buffer.h>
17#include "../common/hid-sensors/hid-sensor-trigger.h"
18
19#define CHANNEL_SCAN_INDEX_PRESENCE 0
20
21struct prox_state {
22 struct hid_sensor_hub_callbacks callbacks;
23 struct hid_sensor_common common_attributes;
24 struct hid_sensor_hub_attribute_info prox_attr;
25 u32 human_presence;
26};
27
28/* Channel definitions */
29static const struct iio_chan_spec prox_channels[] = {
30 {
31 .type = IIO_PROXIMITY,
32 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
33 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
34 BIT(IIO_CHAN_INFO_SCALE) |
35 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
36 BIT(IIO_CHAN_INFO_HYSTERESIS),
37 .scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
38 }
39};
40
41/* Adjust channel real bits based on report descriptor */
42static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
43 int channel, int size)
44{
45 channels[channel].scan_type.sign = 's';
46 /* Real storage bits will change based on the report desc. */
47 channels[channel].scan_type.realbits = size * 8;
48 /* Maximum size of a sample to capture is u32 */
49 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
50}
51
52/* Channel read_raw handler */
53static int prox_read_raw(struct iio_dev *indio_dev,
54 struct iio_chan_spec const *chan,
55 int *val, int *val2,
56 long mask)
57{
58 struct prox_state *prox_state = iio_priv(indio_dev);
59 int report_id = -1;
60 u32 address;
61 int ret_type;
62 s32 min;
63
64 *val = 0;
65 *val2 = 0;
66 switch (mask) {
67 case IIO_CHAN_INFO_RAW:
68 switch (chan->scan_index) {
69 case CHANNEL_SCAN_INDEX_PRESENCE:
70 report_id = prox_state->prox_attr.report_id;
71 min = prox_state->prox_attr.logical_minimum;
72 address = HID_USAGE_SENSOR_HUMAN_PRESENCE;
73 break;
74 default:
75 report_id = -1;
76 break;
77 }
78 if (report_id >= 0) {
79 hid_sensor_power_state(&prox_state->common_attributes,
80 true);
81 *val = sensor_hub_input_attr_get_raw_value(
82 prox_state->common_attributes.hsdev,
83 HID_USAGE_SENSOR_PROX, address,
84 report_id,
85 SENSOR_HUB_SYNC,
86 min < 0);
87 hid_sensor_power_state(&prox_state->common_attributes,
88 false);
89 } else {
90 *val = 0;
91 return -EINVAL;
92 }
93 ret_type = IIO_VAL_INT;
94 break;
95 case IIO_CHAN_INFO_SCALE:
96 *val = prox_state->prox_attr.units;
97 ret_type = IIO_VAL_INT;
98 break;
99 case IIO_CHAN_INFO_OFFSET:
100 *val = hid_sensor_convert_exponent(
101 prox_state->prox_attr.unit_expo);
102 ret_type = IIO_VAL_INT;
103 break;
104 case IIO_CHAN_INFO_SAMP_FREQ:
105 ret_type = hid_sensor_read_samp_freq_value(
106 &prox_state->common_attributes, val, val2);
107 break;
108 case IIO_CHAN_INFO_HYSTERESIS:
109 ret_type = hid_sensor_read_raw_hyst_value(
110 &prox_state->common_attributes, val, val2);
111 break;
112 default:
113 ret_type = -EINVAL;
114 break;
115 }
116
117 return ret_type;
118}
119
120/* Channel write_raw handler */
121static int prox_write_raw(struct iio_dev *indio_dev,
122 struct iio_chan_spec const *chan,
123 int val,
124 int val2,
125 long mask)
126{
127 struct prox_state *prox_state = iio_priv(indio_dev);
128 int ret = 0;
129
130 switch (mask) {
131 case IIO_CHAN_INFO_SAMP_FREQ:
132 ret = hid_sensor_write_samp_freq_value(
133 &prox_state->common_attributes, val, val2);
134 break;
135 case IIO_CHAN_INFO_HYSTERESIS:
136 ret = hid_sensor_write_raw_hyst_value(
137 &prox_state->common_attributes, val, val2);
138 break;
139 default:
140 ret = -EINVAL;
141 }
142
143 return ret;
144}
145
146static const struct iio_info prox_info = {
147 .read_raw = &prox_read_raw,
148 .write_raw = &prox_write_raw,
149};
150
151/* Function to push data to buffer */
152static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
153 int len)
154{
155 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
156 iio_push_to_buffers(indio_dev, data);
157}
158
159/* Callback handler to send event after all samples are received and captured */
160static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
161 unsigned usage_id,
162 void *priv)
163{
164 struct iio_dev *indio_dev = platform_get_drvdata(priv);
165 struct prox_state *prox_state = iio_priv(indio_dev);
166
167 dev_dbg(&indio_dev->dev, "prox_proc_event\n");
168 if (atomic_read(&prox_state->common_attributes.data_ready))
169 hid_sensor_push_data(indio_dev,
170 &prox_state->human_presence,
171 sizeof(prox_state->human_presence));
172
173 return 0;
174}
175
176/* Capture samples in local storage */
177static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
178 unsigned usage_id,
179 size_t raw_len, char *raw_data,
180 void *priv)
181{
182 struct iio_dev *indio_dev = platform_get_drvdata(priv);
183 struct prox_state *prox_state = iio_priv(indio_dev);
184 int ret = -EINVAL;
185
186 switch (usage_id) {
187 case HID_USAGE_SENSOR_HUMAN_PRESENCE:
188 prox_state->human_presence = *(u32 *)raw_data;
189 ret = 0;
190 break;
191 default:
192 break;
193 }
194
195 return ret;
196}
197
198/* Parse report which is specific to an usage id*/
199static int prox_parse_report(struct platform_device *pdev,
200 struct hid_sensor_hub_device *hsdev,
201 struct iio_chan_spec *channels,
202 unsigned usage_id,
203 struct prox_state *st)
204{
205 int ret;
206
207 ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
208 usage_id,
209 HID_USAGE_SENSOR_HUMAN_PRESENCE,
210 &st->prox_attr);
211 if (ret < 0)
212 return ret;
213 prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
214 st->prox_attr.size);
215
216 dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
217 st->prox_attr.report_id);
218
219 /* Set Sensitivity field ids, when there is no individual modifier */
220 if (st->common_attributes.sensitivity.index < 0) {
221 sensor_hub_input_get_attribute_info(hsdev,
222 HID_FEATURE_REPORT, usage_id,
223 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
224 HID_USAGE_SENSOR_DATA_PRESENCE,
225 &st->common_attributes.sensitivity);
226 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
227 st->common_attributes.sensitivity.index,
228 st->common_attributes.sensitivity.report_id);
229 }
230 if (st->common_attributes.sensitivity.index < 0)
231 sensor_hub_input_get_attribute_info(hsdev,
232 HID_FEATURE_REPORT, usage_id,
233 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
234 HID_USAGE_SENSOR_HUMAN_PRESENCE,
235 &st->common_attributes.sensitivity);
236
237 return ret;
238}
239
240/* Function to initialize the processing for usage id */
241static int hid_prox_probe(struct platform_device *pdev)
242{
243 int ret = 0;
244 static const char *name = "prox";
245 struct iio_dev *indio_dev;
246 struct prox_state *prox_state;
247 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
248
249 indio_dev = devm_iio_device_alloc(&pdev->dev,
250 sizeof(struct prox_state));
251 if (!indio_dev)
252 return -ENOMEM;
253 platform_set_drvdata(pdev, indio_dev);
254
255 prox_state = iio_priv(indio_dev);
256 prox_state->common_attributes.hsdev = hsdev;
257 prox_state->common_attributes.pdev = pdev;
258
259 ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
260 &prox_state->common_attributes);
261 if (ret) {
262 dev_err(&pdev->dev, "failed to setup common attributes\n");
263 return ret;
264 }
265
266 indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
267 GFP_KERNEL);
268 if (!indio_dev->channels) {
269 dev_err(&pdev->dev, "failed to duplicate channels\n");
270 return -ENOMEM;
271 }
272
273 ret = prox_parse_report(pdev, hsdev,
274 (struct iio_chan_spec *)indio_dev->channels,
275 HID_USAGE_SENSOR_PROX, prox_state);
276 if (ret) {
277 dev_err(&pdev->dev, "failed to setup attributes\n");
278 goto error_free_dev_mem;
279 }
280
281 indio_dev->num_channels = ARRAY_SIZE(prox_channels);
282 indio_dev->info = &prox_info;
283 indio_dev->name = name;
284 indio_dev->modes = INDIO_DIRECT_MODE;
285
286 atomic_set(&prox_state->common_attributes.data_ready, 0);
287
288 ret = hid_sensor_setup_trigger(indio_dev, name,
289 &prox_state->common_attributes);
290 if (ret) {
291 dev_err(&pdev->dev, "trigger setup failed\n");
292 goto error_free_dev_mem;
293 }
294
295 ret = iio_device_register(indio_dev);
296 if (ret) {
297 dev_err(&pdev->dev, "device register failed\n");
298 goto error_remove_trigger;
299 }
300
301 prox_state->callbacks.send_event = prox_proc_event;
302 prox_state->callbacks.capture_sample = prox_capture_sample;
303 prox_state->callbacks.pdev = pdev;
304 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
305 &prox_state->callbacks);
306 if (ret < 0) {
307 dev_err(&pdev->dev, "callback reg failed\n");
308 goto error_iio_unreg;
309 }
310
311 return ret;
312
313error_iio_unreg:
314 iio_device_unregister(indio_dev);
315error_remove_trigger:
316 hid_sensor_remove_trigger(indio_dev, &prox_state->common_attributes);
317error_free_dev_mem:
318 kfree(indio_dev->channels);
319 return ret;
320}
321
322/* Function to deinitialize the processing for usage id */
323static int hid_prox_remove(struct platform_device *pdev)
324{
325 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
326 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
327 struct prox_state *prox_state = iio_priv(indio_dev);
328
329 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
330 iio_device_unregister(indio_dev);
331 hid_sensor_remove_trigger(indio_dev, &prox_state->common_attributes);
332 kfree(indio_dev->channels);
333
334 return 0;
335}
336
337static const struct platform_device_id hid_prox_ids[] = {
338 {
339 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
340 .name = "HID-SENSOR-200011",
341 },
342 { /* sentinel */ }
343};
344MODULE_DEVICE_TABLE(platform, hid_prox_ids);
345
346static struct platform_driver hid_prox_platform_driver = {
347 .id_table = hid_prox_ids,
348 .driver = {
349 .name = KBUILD_MODNAME,
350 .pm = &hid_sensor_pm_ops,
351 },
352 .probe = hid_prox_probe,
353 .remove = hid_prox_remove,
354};
355module_platform_driver(hid_prox_platform_driver);
356
357MODULE_DESCRIPTION("HID Sensor Proximity");
358MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
359MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HID Sensors Driver
4 * Copyright (c) 2014, Intel Corporation.
5 */
6#include <linux/device.h>
7#include <linux/platform_device.h>
8#include <linux/module.h>
9#include <linux/interrupt.h>
10#include <linux/irq.h>
11#include <linux/slab.h>
12#include <linux/delay.h>
13#include <linux/hid-sensor-hub.h>
14#include <linux/iio/iio.h>
15#include <linux/iio/sysfs.h>
16#include <linux/iio/buffer.h>
17#include <linux/iio/trigger_consumer.h>
18#include <linux/iio/triggered_buffer.h>
19#include "../common/hid-sensors/hid-sensor-trigger.h"
20
21#define CHANNEL_SCAN_INDEX_PRESENCE 0
22
23struct prox_state {
24 struct hid_sensor_hub_callbacks callbacks;
25 struct hid_sensor_common common_attributes;
26 struct hid_sensor_hub_attribute_info prox_attr;
27 u32 human_presence;
28};
29
30/* Channel definitions */
31static const struct iio_chan_spec prox_channels[] = {
32 {
33 .type = IIO_PROXIMITY,
34 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
35 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
36 BIT(IIO_CHAN_INFO_SCALE) |
37 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
38 BIT(IIO_CHAN_INFO_HYSTERESIS),
39 .scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
40 }
41};
42
43/* Adjust channel real bits based on report descriptor */
44static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
45 int channel, int size)
46{
47 channels[channel].scan_type.sign = 's';
48 /* Real storage bits will change based on the report desc. */
49 channels[channel].scan_type.realbits = size * 8;
50 /* Maximum size of a sample to capture is u32 */
51 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
52}
53
54/* Channel read_raw handler */
55static int prox_read_raw(struct iio_dev *indio_dev,
56 struct iio_chan_spec const *chan,
57 int *val, int *val2,
58 long mask)
59{
60 struct prox_state *prox_state = iio_priv(indio_dev);
61 int report_id = -1;
62 u32 address;
63 int ret_type;
64 s32 min;
65
66 *val = 0;
67 *val2 = 0;
68 switch (mask) {
69 case IIO_CHAN_INFO_RAW:
70 switch (chan->scan_index) {
71 case CHANNEL_SCAN_INDEX_PRESENCE:
72 report_id = prox_state->prox_attr.report_id;
73 min = prox_state->prox_attr.logical_minimum;
74 address = HID_USAGE_SENSOR_HUMAN_PRESENCE;
75 break;
76 default:
77 report_id = -1;
78 break;
79 }
80 if (report_id >= 0) {
81 hid_sensor_power_state(&prox_state->common_attributes,
82 true);
83 *val = sensor_hub_input_attr_get_raw_value(
84 prox_state->common_attributes.hsdev,
85 HID_USAGE_SENSOR_PROX, address,
86 report_id,
87 SENSOR_HUB_SYNC,
88 min < 0);
89 hid_sensor_power_state(&prox_state->common_attributes,
90 false);
91 } else {
92 *val = 0;
93 return -EINVAL;
94 }
95 ret_type = IIO_VAL_INT;
96 break;
97 case IIO_CHAN_INFO_SCALE:
98 *val = prox_state->prox_attr.units;
99 ret_type = IIO_VAL_INT;
100 break;
101 case IIO_CHAN_INFO_OFFSET:
102 *val = hid_sensor_convert_exponent(
103 prox_state->prox_attr.unit_expo);
104 ret_type = IIO_VAL_INT;
105 break;
106 case IIO_CHAN_INFO_SAMP_FREQ:
107 ret_type = hid_sensor_read_samp_freq_value(
108 &prox_state->common_attributes, val, val2);
109 break;
110 case IIO_CHAN_INFO_HYSTERESIS:
111 ret_type = hid_sensor_read_raw_hyst_value(
112 &prox_state->common_attributes, val, val2);
113 break;
114 default:
115 ret_type = -EINVAL;
116 break;
117 }
118
119 return ret_type;
120}
121
122/* Channel write_raw handler */
123static int prox_write_raw(struct iio_dev *indio_dev,
124 struct iio_chan_spec const *chan,
125 int val,
126 int val2,
127 long mask)
128{
129 struct prox_state *prox_state = iio_priv(indio_dev);
130 int ret = 0;
131
132 switch (mask) {
133 case IIO_CHAN_INFO_SAMP_FREQ:
134 ret = hid_sensor_write_samp_freq_value(
135 &prox_state->common_attributes, val, val2);
136 break;
137 case IIO_CHAN_INFO_HYSTERESIS:
138 ret = hid_sensor_write_raw_hyst_value(
139 &prox_state->common_attributes, val, val2);
140 break;
141 default:
142 ret = -EINVAL;
143 }
144
145 return ret;
146}
147
148static const struct iio_info prox_info = {
149 .read_raw = &prox_read_raw,
150 .write_raw = &prox_write_raw,
151};
152
153/* Function to push data to buffer */
154static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
155 int len)
156{
157 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
158 iio_push_to_buffers(indio_dev, data);
159}
160
161/* Callback handler to send event after all samples are received and captured */
162static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
163 unsigned usage_id,
164 void *priv)
165{
166 struct iio_dev *indio_dev = platform_get_drvdata(priv);
167 struct prox_state *prox_state = iio_priv(indio_dev);
168
169 dev_dbg(&indio_dev->dev, "prox_proc_event\n");
170 if (atomic_read(&prox_state->common_attributes.data_ready))
171 hid_sensor_push_data(indio_dev,
172 &prox_state->human_presence,
173 sizeof(prox_state->human_presence));
174
175 return 0;
176}
177
178/* Capture samples in local storage */
179static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
180 unsigned usage_id,
181 size_t raw_len, char *raw_data,
182 void *priv)
183{
184 struct iio_dev *indio_dev = platform_get_drvdata(priv);
185 struct prox_state *prox_state = iio_priv(indio_dev);
186 int ret = -EINVAL;
187
188 switch (usage_id) {
189 case HID_USAGE_SENSOR_HUMAN_PRESENCE:
190 prox_state->human_presence = *(u32 *)raw_data;
191 ret = 0;
192 break;
193 default:
194 break;
195 }
196
197 return ret;
198}
199
200/* Parse report which is specific to an usage id*/
201static int prox_parse_report(struct platform_device *pdev,
202 struct hid_sensor_hub_device *hsdev,
203 struct iio_chan_spec *channels,
204 unsigned usage_id,
205 struct prox_state *st)
206{
207 int ret;
208
209 ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
210 usage_id,
211 HID_USAGE_SENSOR_HUMAN_PRESENCE,
212 &st->prox_attr);
213 if (ret < 0)
214 return ret;
215 prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
216 st->prox_attr.size);
217
218 dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
219 st->prox_attr.report_id);
220
221 /* Set Sensitivity field ids, when there is no individual modifier */
222 if (st->common_attributes.sensitivity.index < 0) {
223 sensor_hub_input_get_attribute_info(hsdev,
224 HID_FEATURE_REPORT, usage_id,
225 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
226 HID_USAGE_SENSOR_DATA_PRESENCE,
227 &st->common_attributes.sensitivity);
228 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
229 st->common_attributes.sensitivity.index,
230 st->common_attributes.sensitivity.report_id);
231 }
232 if (st->common_attributes.sensitivity.index < 0)
233 sensor_hub_input_get_attribute_info(hsdev,
234 HID_FEATURE_REPORT, usage_id,
235 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
236 HID_USAGE_SENSOR_HUMAN_PRESENCE,
237 &st->common_attributes.sensitivity);
238
239 return ret;
240}
241
242/* Function to initialize the processing for usage id */
243static int hid_prox_probe(struct platform_device *pdev)
244{
245 int ret = 0;
246 static const char *name = "prox";
247 struct iio_dev *indio_dev;
248 struct prox_state *prox_state;
249 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
250
251 indio_dev = devm_iio_device_alloc(&pdev->dev,
252 sizeof(struct prox_state));
253 if (!indio_dev)
254 return -ENOMEM;
255 platform_set_drvdata(pdev, indio_dev);
256
257 prox_state = iio_priv(indio_dev);
258 prox_state->common_attributes.hsdev = hsdev;
259 prox_state->common_attributes.pdev = pdev;
260
261 ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
262 &prox_state->common_attributes);
263 if (ret) {
264 dev_err(&pdev->dev, "failed to setup common attributes\n");
265 return ret;
266 }
267
268 indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
269 GFP_KERNEL);
270 if (!indio_dev->channels) {
271 dev_err(&pdev->dev, "failed to duplicate channels\n");
272 return -ENOMEM;
273 }
274
275 ret = prox_parse_report(pdev, hsdev,
276 (struct iio_chan_spec *)indio_dev->channels,
277 HID_USAGE_SENSOR_PROX, prox_state);
278 if (ret) {
279 dev_err(&pdev->dev, "failed to setup attributes\n");
280 goto error_free_dev_mem;
281 }
282
283 indio_dev->num_channels = ARRAY_SIZE(prox_channels);
284 indio_dev->dev.parent = &pdev->dev;
285 indio_dev->info = &prox_info;
286 indio_dev->name = name;
287 indio_dev->modes = INDIO_DIRECT_MODE;
288
289 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
290 NULL, NULL);
291 if (ret) {
292 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
293 goto error_free_dev_mem;
294 }
295 atomic_set(&prox_state->common_attributes.data_ready, 0);
296 ret = hid_sensor_setup_trigger(indio_dev, name,
297 &prox_state->common_attributes);
298 if (ret) {
299 dev_err(&pdev->dev, "trigger setup failed\n");
300 goto error_unreg_buffer_funcs;
301 }
302
303 ret = iio_device_register(indio_dev);
304 if (ret) {
305 dev_err(&pdev->dev, "device register failed\n");
306 goto error_remove_trigger;
307 }
308
309 prox_state->callbacks.send_event = prox_proc_event;
310 prox_state->callbacks.capture_sample = prox_capture_sample;
311 prox_state->callbacks.pdev = pdev;
312 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
313 &prox_state->callbacks);
314 if (ret < 0) {
315 dev_err(&pdev->dev, "callback reg failed\n");
316 goto error_iio_unreg;
317 }
318
319 return ret;
320
321error_iio_unreg:
322 iio_device_unregister(indio_dev);
323error_remove_trigger:
324 hid_sensor_remove_trigger(&prox_state->common_attributes);
325error_unreg_buffer_funcs:
326 iio_triggered_buffer_cleanup(indio_dev);
327error_free_dev_mem:
328 kfree(indio_dev->channels);
329 return ret;
330}
331
332/* Function to deinitialize the processing for usage id */
333static int hid_prox_remove(struct platform_device *pdev)
334{
335 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
336 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
337 struct prox_state *prox_state = iio_priv(indio_dev);
338
339 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
340 iio_device_unregister(indio_dev);
341 hid_sensor_remove_trigger(&prox_state->common_attributes);
342 iio_triggered_buffer_cleanup(indio_dev);
343 kfree(indio_dev->channels);
344
345 return 0;
346}
347
348static const struct platform_device_id hid_prox_ids[] = {
349 {
350 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
351 .name = "HID-SENSOR-200011",
352 },
353 { /* sentinel */ }
354};
355MODULE_DEVICE_TABLE(platform, hid_prox_ids);
356
357static struct platform_driver hid_prox_platform_driver = {
358 .id_table = hid_prox_ids,
359 .driver = {
360 .name = KBUILD_MODNAME,
361 .pm = &hid_sensor_pm_ops,
362 },
363 .probe = hid_prox_probe,
364 .remove = hid_prox_remove,
365};
366module_platform_driver(hid_prox_platform_driver);
367
368MODULE_DESCRIPTION("HID Sensor Proximity");
369MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
370MODULE_LICENSE("GPL");