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1/*
2 * HID Sensors Driver
3 * Copyright (c) 2012, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19#include <linux/device.h>
20#include <linux/platform_device.h>
21#include <linux/module.h>
22#include <linux/interrupt.h>
23#include <linux/irq.h>
24#include <linux/slab.h>
25#include <linux/delay.h>
26#include <linux/hid-sensor-hub.h>
27#include <linux/iio/iio.h>
28#include <linux/iio/sysfs.h>
29#include <linux/iio/buffer.h>
30#include <linux/iio/trigger_consumer.h>
31#include <linux/iio/triggered_buffer.h>
32#include "../common/hid-sensors/hid-sensor-trigger.h"
33
34#define CHANNEL_SCAN_INDEX_ILLUM 0
35
36struct als_state {
37 struct hid_sensor_hub_callbacks callbacks;
38 struct hid_sensor_common common_attributes;
39 struct hid_sensor_hub_attribute_info als_illum;
40 u32 illum;
41 int scale_pre_decml;
42 int scale_post_decml;
43 int scale_precision;
44 int value_offset;
45};
46
47/* Channel definitions */
48static const struct iio_chan_spec als_channels[] = {
49 {
50 .type = IIO_INTENSITY,
51 .modified = 1,
52 .channel2 = IIO_MOD_LIGHT_BOTH,
53 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
54 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
55 BIT(IIO_CHAN_INFO_SCALE) |
56 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
57 BIT(IIO_CHAN_INFO_HYSTERESIS),
58 .scan_index = CHANNEL_SCAN_INDEX_ILLUM,
59 }
60};
61
62/* Adjust channel real bits based on report descriptor */
63static void als_adjust_channel_bit_mask(struct iio_chan_spec *channels,
64 int channel, int size)
65{
66 channels[channel].scan_type.sign = 's';
67 /* Real storage bits will change based on the report desc. */
68 channels[channel].scan_type.realbits = size * 8;
69 /* Maximum size of a sample to capture is u32 */
70 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
71}
72
73/* Channel read_raw handler */
74static int als_read_raw(struct iio_dev *indio_dev,
75 struct iio_chan_spec const *chan,
76 int *val, int *val2,
77 long mask)
78{
79 struct als_state *als_state = iio_priv(indio_dev);
80 int report_id = -1;
81 u32 address;
82 int ret_type;
83
84 *val = 0;
85 *val2 = 0;
86 switch (mask) {
87 case 0:
88 switch (chan->scan_index) {
89 case CHANNEL_SCAN_INDEX_ILLUM:
90 report_id = als_state->als_illum.report_id;
91 address =
92 HID_USAGE_SENSOR_LIGHT_ILLUM;
93 break;
94 default:
95 report_id = -1;
96 break;
97 }
98 if (report_id >= 0) {
99 hid_sensor_power_state(&als_state->common_attributes,
100 true);
101 *val = sensor_hub_input_attr_get_raw_value(
102 als_state->common_attributes.hsdev,
103 HID_USAGE_SENSOR_ALS, address,
104 report_id,
105 SENSOR_HUB_SYNC);
106 hid_sensor_power_state(&als_state->common_attributes,
107 false);
108 } else {
109 *val = 0;
110 return -EINVAL;
111 }
112 ret_type = IIO_VAL_INT;
113 break;
114 case IIO_CHAN_INFO_SCALE:
115 *val = als_state->scale_pre_decml;
116 *val2 = als_state->scale_post_decml;
117 ret_type = als_state->scale_precision;
118 break;
119 case IIO_CHAN_INFO_OFFSET:
120 *val = als_state->value_offset;
121 ret_type = IIO_VAL_INT;
122 break;
123 case IIO_CHAN_INFO_SAMP_FREQ:
124 ret_type = hid_sensor_read_samp_freq_value(
125 &als_state->common_attributes, val, val2);
126 break;
127 case IIO_CHAN_INFO_HYSTERESIS:
128 ret_type = hid_sensor_read_raw_hyst_value(
129 &als_state->common_attributes, val, val2);
130 break;
131 default:
132 ret_type = -EINVAL;
133 break;
134 }
135
136 return ret_type;
137}
138
139/* Channel write_raw handler */
140static int als_write_raw(struct iio_dev *indio_dev,
141 struct iio_chan_spec const *chan,
142 int val,
143 int val2,
144 long mask)
145{
146 struct als_state *als_state = iio_priv(indio_dev);
147 int ret = 0;
148
149 switch (mask) {
150 case IIO_CHAN_INFO_SAMP_FREQ:
151 ret = hid_sensor_write_samp_freq_value(
152 &als_state->common_attributes, val, val2);
153 break;
154 case IIO_CHAN_INFO_HYSTERESIS:
155 ret = hid_sensor_write_raw_hyst_value(
156 &als_state->common_attributes, val, val2);
157 break;
158 default:
159 ret = -EINVAL;
160 }
161
162 return ret;
163}
164
165static const struct iio_info als_info = {
166 .driver_module = THIS_MODULE,
167 .read_raw = &als_read_raw,
168 .write_raw = &als_write_raw,
169};
170
171/* Function to push data to buffer */
172static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
173 int len)
174{
175 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
176 iio_push_to_buffers(indio_dev, data);
177}
178
179/* Callback handler to send event after all samples are received and captured */
180static int als_proc_event(struct hid_sensor_hub_device *hsdev,
181 unsigned usage_id,
182 void *priv)
183{
184 struct iio_dev *indio_dev = platform_get_drvdata(priv);
185 struct als_state *als_state = iio_priv(indio_dev);
186
187 dev_dbg(&indio_dev->dev, "als_proc_event\n");
188 if (atomic_read(&als_state->common_attributes.data_ready))
189 hid_sensor_push_data(indio_dev,
190 &als_state->illum,
191 sizeof(als_state->illum));
192
193 return 0;
194}
195
196/* Capture samples in local storage */
197static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
198 unsigned usage_id,
199 size_t raw_len, char *raw_data,
200 void *priv)
201{
202 struct iio_dev *indio_dev = platform_get_drvdata(priv);
203 struct als_state *als_state = iio_priv(indio_dev);
204 int ret = -EINVAL;
205
206 switch (usage_id) {
207 case HID_USAGE_SENSOR_LIGHT_ILLUM:
208 als_state->illum = *(u32 *)raw_data;
209 ret = 0;
210 break;
211 default:
212 break;
213 }
214
215 return ret;
216}
217
218/* Parse report which is specific to an usage id*/
219static int als_parse_report(struct platform_device *pdev,
220 struct hid_sensor_hub_device *hsdev,
221 struct iio_chan_spec *channels,
222 unsigned usage_id,
223 struct als_state *st)
224{
225 int ret;
226
227 ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
228 usage_id,
229 HID_USAGE_SENSOR_LIGHT_ILLUM,
230 &st->als_illum);
231 if (ret < 0)
232 return ret;
233 als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
234 st->als_illum.size);
235
236 dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index,
237 st->als_illum.report_id);
238
239 st->scale_precision = hid_sensor_format_scale(
240 HID_USAGE_SENSOR_ALS,
241 &st->als_illum,
242 &st->scale_pre_decml, &st->scale_post_decml);
243
244 /* Set Sensitivity field ids, when there is no individual modifier */
245 if (st->common_attributes.sensitivity.index < 0) {
246 sensor_hub_input_get_attribute_info(hsdev,
247 HID_FEATURE_REPORT, usage_id,
248 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
249 HID_USAGE_SENSOR_DATA_LIGHT,
250 &st->common_attributes.sensitivity);
251 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
252 st->common_attributes.sensitivity.index,
253 st->common_attributes.sensitivity.report_id);
254 }
255 return ret;
256}
257
258/* Function to initialize the processing for usage id */
259static int hid_als_probe(struct platform_device *pdev)
260{
261 int ret = 0;
262 static const char *name = "als";
263 struct iio_dev *indio_dev;
264 struct als_state *als_state;
265 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
266
267 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct als_state));
268 if (!indio_dev)
269 return -ENOMEM;
270 platform_set_drvdata(pdev, indio_dev);
271
272 als_state = iio_priv(indio_dev);
273 als_state->common_attributes.hsdev = hsdev;
274 als_state->common_attributes.pdev = pdev;
275
276 ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_ALS,
277 &als_state->common_attributes);
278 if (ret) {
279 dev_err(&pdev->dev, "failed to setup common attributes\n");
280 return ret;
281 }
282
283 indio_dev->channels = kmemdup(als_channels,
284 sizeof(als_channels), GFP_KERNEL);
285 if (!indio_dev->channels) {
286 dev_err(&pdev->dev, "failed to duplicate channels\n");
287 return -ENOMEM;
288 }
289
290 ret = als_parse_report(pdev, hsdev,
291 (struct iio_chan_spec *)indio_dev->channels,
292 HID_USAGE_SENSOR_ALS, als_state);
293 if (ret) {
294 dev_err(&pdev->dev, "failed to setup attributes\n");
295 goto error_free_dev_mem;
296 }
297
298 indio_dev->num_channels =
299 ARRAY_SIZE(als_channels);
300 indio_dev->dev.parent = &pdev->dev;
301 indio_dev->info = &als_info;
302 indio_dev->name = name;
303 indio_dev->modes = INDIO_DIRECT_MODE;
304
305 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
306 NULL, NULL);
307 if (ret) {
308 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
309 goto error_free_dev_mem;
310 }
311 atomic_set(&als_state->common_attributes.data_ready, 0);
312 ret = hid_sensor_setup_trigger(indio_dev, name,
313 &als_state->common_attributes);
314 if (ret < 0) {
315 dev_err(&pdev->dev, "trigger setup failed\n");
316 goto error_unreg_buffer_funcs;
317 }
318
319 ret = iio_device_register(indio_dev);
320 if (ret) {
321 dev_err(&pdev->dev, "device register failed\n");
322 goto error_remove_trigger;
323 }
324
325 als_state->callbacks.send_event = als_proc_event;
326 als_state->callbacks.capture_sample = als_capture_sample;
327 als_state->callbacks.pdev = pdev;
328 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ALS,
329 &als_state->callbacks);
330 if (ret < 0) {
331 dev_err(&pdev->dev, "callback reg failed\n");
332 goto error_iio_unreg;
333 }
334
335 return ret;
336
337error_iio_unreg:
338 iio_device_unregister(indio_dev);
339error_remove_trigger:
340 hid_sensor_remove_trigger(&als_state->common_attributes);
341error_unreg_buffer_funcs:
342 iio_triggered_buffer_cleanup(indio_dev);
343error_free_dev_mem:
344 kfree(indio_dev->channels);
345 return ret;
346}
347
348/* Function to deinitialize the processing for usage id */
349static int hid_als_remove(struct platform_device *pdev)
350{
351 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
352 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
353 struct als_state *als_state = iio_priv(indio_dev);
354
355 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
356 iio_device_unregister(indio_dev);
357 hid_sensor_remove_trigger(&als_state->common_attributes);
358 iio_triggered_buffer_cleanup(indio_dev);
359 kfree(indio_dev->channels);
360
361 return 0;
362}
363
364static const struct platform_device_id hid_als_ids[] = {
365 {
366 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
367 .name = "HID-SENSOR-200041",
368 },
369 { /* sentinel */ }
370};
371MODULE_DEVICE_TABLE(platform, hid_als_ids);
372
373static struct platform_driver hid_als_platform_driver = {
374 .id_table = hid_als_ids,
375 .driver = {
376 .name = KBUILD_MODNAME,
377 .pm = &hid_sensor_pm_ops,
378 },
379 .probe = hid_als_probe,
380 .remove = hid_als_remove,
381};
382module_platform_driver(hid_als_platform_driver);
383
384MODULE_DESCRIPTION("HID Sensor ALS");
385MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
386MODULE_LICENSE("GPL");
1/*
2 * HID Sensors Driver
3 * Copyright (c) 2012, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19#include <linux/device.h>
20#include <linux/platform_device.h>
21#include <linux/module.h>
22#include <linux/interrupt.h>
23#include <linux/irq.h>
24#include <linux/slab.h>
25#include <linux/hid-sensor-hub.h>
26#include <linux/iio/iio.h>
27#include <linux/iio/sysfs.h>
28#include <linux/iio/buffer.h>
29#include <linux/iio/trigger_consumer.h>
30#include <linux/iio/triggered_buffer.h>
31#include "../common/hid-sensors/hid-sensor-trigger.h"
32
33#define CHANNEL_SCAN_INDEX_ILLUM 0
34
35struct als_state {
36 struct hid_sensor_hub_callbacks callbacks;
37 struct hid_sensor_common common_attributes;
38 struct hid_sensor_hub_attribute_info als_illum;
39 u32 illum;
40};
41
42/* Channel definitions */
43static const struct iio_chan_spec als_channels[] = {
44 {
45 .type = IIO_INTENSITY,
46 .modified = 1,
47 .channel2 = IIO_MOD_LIGHT_BOTH,
48 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
49 BIT(IIO_CHAN_INFO_SCALE) |
50 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
51 BIT(IIO_CHAN_INFO_HYSTERESIS),
52 .scan_index = CHANNEL_SCAN_INDEX_ILLUM,
53 }
54};
55
56/* Adjust channel real bits based on report descriptor */
57static void als_adjust_channel_bit_mask(struct iio_chan_spec *channels,
58 int channel, int size)
59{
60 channels[channel].scan_type.sign = 's';
61 /* Real storage bits will change based on the report desc. */
62 channels[channel].scan_type.realbits = size * 8;
63 /* Maximum size of a sample to capture is u32 */
64 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
65}
66
67/* Channel read_raw handler */
68static int als_read_raw(struct iio_dev *indio_dev,
69 struct iio_chan_spec const *chan,
70 int *val, int *val2,
71 long mask)
72{
73 struct als_state *als_state = iio_priv(indio_dev);
74 int report_id = -1;
75 u32 address;
76 int ret;
77 int ret_type;
78
79 *val = 0;
80 *val2 = 0;
81 switch (mask) {
82 case 0:
83 switch (chan->scan_index) {
84 case CHANNEL_SCAN_INDEX_ILLUM:
85 report_id = als_state->als_illum.report_id;
86 address =
87 HID_USAGE_SENSOR_LIGHT_ILLUM;
88 break;
89 default:
90 report_id = -1;
91 break;
92 }
93 if (report_id >= 0)
94 *val = sensor_hub_input_attr_get_raw_value(
95 als_state->common_attributes.hsdev,
96 HID_USAGE_SENSOR_ALS, address,
97 report_id);
98 else {
99 *val = 0;
100 return -EINVAL;
101 }
102 ret_type = IIO_VAL_INT;
103 break;
104 case IIO_CHAN_INFO_SCALE:
105 *val = als_state->als_illum.units;
106 ret_type = IIO_VAL_INT;
107 break;
108 case IIO_CHAN_INFO_OFFSET:
109 *val = hid_sensor_convert_exponent(
110 als_state->als_illum.unit_expo);
111 ret_type = IIO_VAL_INT;
112 break;
113 case IIO_CHAN_INFO_SAMP_FREQ:
114 ret = hid_sensor_read_samp_freq_value(
115 &als_state->common_attributes, val, val2);
116 ret_type = IIO_VAL_INT_PLUS_MICRO;
117 break;
118 case IIO_CHAN_INFO_HYSTERESIS:
119 ret = hid_sensor_read_raw_hyst_value(
120 &als_state->common_attributes, val, val2);
121 ret_type = IIO_VAL_INT_PLUS_MICRO;
122 break;
123 default:
124 ret_type = -EINVAL;
125 break;
126 }
127
128 return ret_type;
129}
130
131/* Channel write_raw handler */
132static int als_write_raw(struct iio_dev *indio_dev,
133 struct iio_chan_spec const *chan,
134 int val,
135 int val2,
136 long mask)
137{
138 struct als_state *als_state = iio_priv(indio_dev);
139 int ret = 0;
140
141 switch (mask) {
142 case IIO_CHAN_INFO_SAMP_FREQ:
143 ret = hid_sensor_write_samp_freq_value(
144 &als_state->common_attributes, val, val2);
145 break;
146 case IIO_CHAN_INFO_HYSTERESIS:
147 ret = hid_sensor_write_raw_hyst_value(
148 &als_state->common_attributes, val, val2);
149 break;
150 default:
151 ret = -EINVAL;
152 }
153
154 return ret;
155}
156
157static const struct iio_info als_info = {
158 .driver_module = THIS_MODULE,
159 .read_raw = &als_read_raw,
160 .write_raw = &als_write_raw,
161};
162
163/* Function to push data to buffer */
164static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
165 int len)
166{
167 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
168 iio_push_to_buffers(indio_dev, data);
169}
170
171/* Callback handler to send event after all samples are received and captured */
172static int als_proc_event(struct hid_sensor_hub_device *hsdev,
173 unsigned usage_id,
174 void *priv)
175{
176 struct iio_dev *indio_dev = platform_get_drvdata(priv);
177 struct als_state *als_state = iio_priv(indio_dev);
178
179 dev_dbg(&indio_dev->dev, "als_proc_event [%d]\n",
180 als_state->common_attributes.data_ready);
181 if (als_state->common_attributes.data_ready)
182 hid_sensor_push_data(indio_dev,
183 &als_state->illum,
184 sizeof(als_state->illum));
185
186 return 0;
187}
188
189/* Capture samples in local storage */
190static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
191 unsigned usage_id,
192 size_t raw_len, char *raw_data,
193 void *priv)
194{
195 struct iio_dev *indio_dev = platform_get_drvdata(priv);
196 struct als_state *als_state = iio_priv(indio_dev);
197 int ret = -EINVAL;
198
199 switch (usage_id) {
200 case HID_USAGE_SENSOR_LIGHT_ILLUM:
201 als_state->illum = *(u32 *)raw_data;
202 ret = 0;
203 break;
204 default:
205 break;
206 }
207
208 return ret;
209}
210
211/* Parse report which is specific to an usage id*/
212static int als_parse_report(struct platform_device *pdev,
213 struct hid_sensor_hub_device *hsdev,
214 struct iio_chan_spec *channels,
215 unsigned usage_id,
216 struct als_state *st)
217{
218 int ret;
219
220 ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
221 usage_id,
222 HID_USAGE_SENSOR_LIGHT_ILLUM,
223 &st->als_illum);
224 if (ret < 0)
225 return ret;
226 als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
227 st->als_illum.size);
228
229 dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index,
230 st->als_illum.report_id);
231
232 /* Set Sensitivity field ids, when there is no individual modifier */
233 if (st->common_attributes.sensitivity.index < 0) {
234 sensor_hub_input_get_attribute_info(hsdev,
235 HID_FEATURE_REPORT, usage_id,
236 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
237 HID_USAGE_SENSOR_DATA_LIGHT,
238 &st->common_attributes.sensitivity);
239 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
240 st->common_attributes.sensitivity.index,
241 st->common_attributes.sensitivity.report_id);
242 }
243 return ret;
244}
245
246/* Function to initialize the processing for usage id */
247static int hid_als_probe(struct platform_device *pdev)
248{
249 int ret = 0;
250 static const char *name = "als";
251 struct iio_dev *indio_dev;
252 struct als_state *als_state;
253 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
254 struct iio_chan_spec *channels;
255
256 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct als_state));
257 if (!indio_dev)
258 return -ENOMEM;
259 platform_set_drvdata(pdev, indio_dev);
260
261 als_state = iio_priv(indio_dev);
262 als_state->common_attributes.hsdev = hsdev;
263 als_state->common_attributes.pdev = pdev;
264
265 ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_ALS,
266 &als_state->common_attributes);
267 if (ret) {
268 dev_err(&pdev->dev, "failed to setup common attributes\n");
269 return ret;
270 }
271
272 channels = kmemdup(als_channels, sizeof(als_channels), GFP_KERNEL);
273 if (!channels) {
274 dev_err(&pdev->dev, "failed to duplicate channels\n");
275 return -ENOMEM;
276 }
277
278 ret = als_parse_report(pdev, hsdev, channels,
279 HID_USAGE_SENSOR_ALS, als_state);
280 if (ret) {
281 dev_err(&pdev->dev, "failed to setup attributes\n");
282 goto error_free_dev_mem;
283 }
284
285 indio_dev->channels = channels;
286 indio_dev->num_channels =
287 ARRAY_SIZE(als_channels);
288 indio_dev->dev.parent = &pdev->dev;
289 indio_dev->info = &als_info;
290 indio_dev->name = name;
291 indio_dev->modes = INDIO_DIRECT_MODE;
292
293 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
294 NULL, NULL);
295 if (ret) {
296 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
297 goto error_free_dev_mem;
298 }
299 als_state->common_attributes.data_ready = false;
300 ret = hid_sensor_setup_trigger(indio_dev, name,
301 &als_state->common_attributes);
302 if (ret < 0) {
303 dev_err(&pdev->dev, "trigger setup failed\n");
304 goto error_unreg_buffer_funcs;
305 }
306
307 ret = iio_device_register(indio_dev);
308 if (ret) {
309 dev_err(&pdev->dev, "device register failed\n");
310 goto error_remove_trigger;
311 }
312
313 als_state->callbacks.send_event = als_proc_event;
314 als_state->callbacks.capture_sample = als_capture_sample;
315 als_state->callbacks.pdev = pdev;
316 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ALS,
317 &als_state->callbacks);
318 if (ret < 0) {
319 dev_err(&pdev->dev, "callback reg failed\n");
320 goto error_iio_unreg;
321 }
322
323 return ret;
324
325error_iio_unreg:
326 iio_device_unregister(indio_dev);
327error_remove_trigger:
328 hid_sensor_remove_trigger(&als_state->common_attributes);
329error_unreg_buffer_funcs:
330 iio_triggered_buffer_cleanup(indio_dev);
331error_free_dev_mem:
332 kfree(indio_dev->channels);
333 return ret;
334}
335
336/* Function to deinitialize the processing for usage id */
337static int hid_als_remove(struct platform_device *pdev)
338{
339 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
340 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
341 struct als_state *als_state = iio_priv(indio_dev);
342
343 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
344 iio_device_unregister(indio_dev);
345 hid_sensor_remove_trigger(&als_state->common_attributes);
346 iio_triggered_buffer_cleanup(indio_dev);
347 kfree(indio_dev->channels);
348
349 return 0;
350}
351
352static struct platform_device_id hid_als_ids[] = {
353 {
354 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
355 .name = "HID-SENSOR-200041",
356 },
357 { /* sentinel */ }
358};
359MODULE_DEVICE_TABLE(platform, hid_als_ids);
360
361static struct platform_driver hid_als_platform_driver = {
362 .id_table = hid_als_ids,
363 .driver = {
364 .name = KBUILD_MODNAME,
365 .owner = THIS_MODULE,
366 },
367 .probe = hid_als_probe,
368 .remove = hid_als_remove,
369};
370module_platform_driver(hid_als_platform_driver);
371
372MODULE_DESCRIPTION("HID Sensor ALS");
373MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
374MODULE_LICENSE("GPL");