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c78b9171 VD |
1 | /* |
2 | * Freescale MMA9551L Intelligent Motion-Sensing Platform driver | |
3 | * Copyright (c) 2014, 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 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/acpi.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/gpio/consumer.h> | |
22 | #include <linux/iio/iio.h> | |
23 | #include <linux/iio/sysfs.h> | |
24 | #include <linux/iio/events.h> | |
6da93a67 | 25 | #include <linux/pm_runtime.h> |
d5b97f5c | 26 | #include "mma9551_core.h" |
c78b9171 VD |
27 | |
28 | #define MMA9551_DRV_NAME "mma9551" | |
29 | #define MMA9551_IRQ_NAME "mma9551_event" | |
c78b9171 VD |
30 | #define MMA9551_GPIO_COUNT 4 |
31 | ||
c78b9171 VD |
32 | /* Tilt application (inclination in IIO terms). */ |
33 | #define MMA9551_TILT_XZ_ANG_REG 0x00 | |
34 | #define MMA9551_TILT_YZ_ANG_REG 0x01 | |
35 | #define MMA9551_TILT_XY_ANG_REG 0x02 | |
36 | #define MMA9551_TILT_ANGFLG BIT(7) | |
37 | #define MMA9551_TILT_QUAD_REG 0x03 | |
38 | #define MMA9551_TILT_XY_QUAD_SHIFT 0 | |
39 | #define MMA9551_TILT_YZ_QUAD_SHIFT 2 | |
40 | #define MMA9551_TILT_XZ_QUAD_SHIFT 4 | |
41 | #define MMA9551_TILT_CFG_REG 0x01 | |
42 | #define MMA9551_TILT_ANG_THRESH_MASK GENMASK(3, 0) | |
43 | ||
d5b97f5c IT |
44 | #define MMA9551_DEFAULT_SAMPLE_RATE 122 /* Hz */ |
45 | ||
c78b9171 VD |
46 | /* Tilt events are mapped to the first three GPIO pins. */ |
47 | enum mma9551_tilt_axis { | |
48 | mma9551_x = 0, | |
49 | mma9551_y, | |
50 | mma9551_z, | |
51 | }; | |
52 | ||
c78b9171 VD |
53 | struct mma9551_data { |
54 | struct i2c_client *client; | |
55 | struct mutex mutex; | |
56 | int event_enabled[3]; | |
57 | int irqs[MMA9551_GPIO_COUNT]; | |
58 | }; | |
59 | ||
c78b9171 VD |
60 | static int mma9551_read_incli_chan(struct i2c_client *client, |
61 | const struct iio_chan_spec *chan, | |
62 | int *val) | |
63 | { | |
64 | u8 quad_shift, angle, quadrant; | |
65 | u16 reg_addr; | |
66 | int ret; | |
67 | ||
68 | switch (chan->channel2) { | |
69 | case IIO_MOD_X: | |
70 | reg_addr = MMA9551_TILT_YZ_ANG_REG; | |
71 | quad_shift = MMA9551_TILT_YZ_QUAD_SHIFT; | |
72 | break; | |
73 | case IIO_MOD_Y: | |
74 | reg_addr = MMA9551_TILT_XZ_ANG_REG; | |
75 | quad_shift = MMA9551_TILT_XZ_QUAD_SHIFT; | |
76 | break; | |
77 | case IIO_MOD_Z: | |
78 | reg_addr = MMA9551_TILT_XY_ANG_REG; | |
79 | quad_shift = MMA9551_TILT_XY_QUAD_SHIFT; | |
80 | break; | |
81 | default: | |
82 | return -EINVAL; | |
83 | } | |
84 | ||
6da93a67 IT |
85 | ret = mma9551_set_power_state(client, true); |
86 | if (ret < 0) | |
87 | return ret; | |
88 | ||
c78b9171 VD |
89 | ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT, |
90 | reg_addr, &angle); | |
91 | if (ret < 0) | |
6da93a67 | 92 | goto out_poweroff; |
c78b9171 VD |
93 | |
94 | ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT, | |
95 | MMA9551_TILT_QUAD_REG, &quadrant); | |
96 | if (ret < 0) | |
6da93a67 | 97 | goto out_poweroff; |
c78b9171 VD |
98 | |
99 | angle &= ~MMA9551_TILT_ANGFLG; | |
100 | quadrant = (quadrant >> quad_shift) & 0x03; | |
101 | ||
102 | if (quadrant == 1 || quadrant == 3) | |
103 | *val = 90 * (quadrant + 1) - angle; | |
104 | else | |
105 | *val = angle + 90 * quadrant; | |
106 | ||
6da93a67 IT |
107 | ret = IIO_VAL_INT; |
108 | ||
109 | out_poweroff: | |
110 | mma9551_set_power_state(client, false); | |
111 | return ret; | |
c78b9171 VD |
112 | } |
113 | ||
c78b9171 VD |
114 | static int mma9551_read_raw(struct iio_dev *indio_dev, |
115 | struct iio_chan_spec const *chan, | |
116 | int *val, int *val2, long mask) | |
117 | { | |
118 | struct mma9551_data *data = iio_priv(indio_dev); | |
119 | int ret; | |
120 | ||
121 | switch (mask) { | |
122 | case IIO_CHAN_INFO_PROCESSED: | |
123 | switch (chan->type) { | |
124 | case IIO_INCLI: | |
125 | mutex_lock(&data->mutex); | |
126 | ret = mma9551_read_incli_chan(data->client, chan, val); | |
127 | mutex_unlock(&data->mutex); | |
128 | return ret; | |
129 | default: | |
130 | return -EINVAL; | |
131 | } | |
132 | case IIO_CHAN_INFO_RAW: | |
133 | switch (chan->type) { | |
134 | case IIO_ACCEL: | |
135 | mutex_lock(&data->mutex); | |
136 | ret = mma9551_read_accel_chan(data->client, | |
137 | chan, val, val2); | |
138 | mutex_unlock(&data->mutex); | |
139 | return ret; | |
140 | default: | |
141 | return -EINVAL; | |
142 | } | |
143 | case IIO_CHAN_INFO_SCALE: | |
144 | switch (chan->type) { | |
145 | case IIO_ACCEL: | |
d5b97f5c | 146 | return mma9551_read_accel_scale(val, val2); |
c78b9171 VD |
147 | default: |
148 | return -EINVAL; | |
149 | } | |
150 | default: | |
151 | return -EINVAL; | |
152 | } | |
153 | } | |
154 | ||
155 | static int mma9551_read_event_config(struct iio_dev *indio_dev, | |
156 | const struct iio_chan_spec *chan, | |
157 | enum iio_event_type type, | |
158 | enum iio_event_direction dir) | |
159 | { | |
160 | struct mma9551_data *data = iio_priv(indio_dev); | |
161 | ||
162 | switch (chan->type) { | |
163 | case IIO_INCLI: | |
164 | /* IIO counts axes from 1, because IIO_NO_MOD is 0. */ | |
165 | return data->event_enabled[chan->channel2 - 1]; | |
166 | default: | |
167 | return -EINVAL; | |
168 | } | |
169 | } | |
170 | ||
171 | static int mma9551_config_incli_event(struct iio_dev *indio_dev, | |
172 | enum iio_modifier axis, | |
173 | int state) | |
174 | { | |
175 | struct mma9551_data *data = iio_priv(indio_dev); | |
176 | enum mma9551_tilt_axis mma_axis; | |
177 | int ret; | |
178 | ||
179 | /* IIO counts axes from 1, because IIO_NO_MOD is 0. */ | |
180 | mma_axis = axis - 1; | |
181 | ||
182 | if (data->event_enabled[mma_axis] == state) | |
183 | return 0; | |
184 | ||
185 | if (state == 0) { | |
60347e71 VD |
186 | ret = mma9551_gpio_config(data->client, |
187 | (enum mma9551_gpio_pin)mma_axis, | |
c78b9171 VD |
188 | MMA9551_APPID_NONE, 0, 0); |
189 | if (ret < 0) | |
190 | return ret; | |
6da93a67 IT |
191 | |
192 | ret = mma9551_set_power_state(data->client, false); | |
193 | if (ret < 0) | |
194 | return ret; | |
c78b9171 VD |
195 | } else { |
196 | int bitnum; | |
197 | ||
198 | /* Bit 7 of each angle register holds the angle flag. */ | |
199 | switch (axis) { | |
200 | case IIO_MOD_X: | |
201 | bitnum = 7 + 8 * MMA9551_TILT_YZ_ANG_REG; | |
202 | break; | |
203 | case IIO_MOD_Y: | |
204 | bitnum = 7 + 8 * MMA9551_TILT_XZ_ANG_REG; | |
205 | break; | |
206 | case IIO_MOD_Z: | |
207 | bitnum = 7 + 8 * MMA9551_TILT_XY_ANG_REG; | |
208 | break; | |
209 | default: | |
210 | return -EINVAL; | |
211 | } | |
212 | ||
6da93a67 IT |
213 | |
214 | ret = mma9551_set_power_state(data->client, true); | |
215 | if (ret < 0) | |
216 | return ret; | |
217 | ||
60347e71 VD |
218 | ret = mma9551_gpio_config(data->client, |
219 | (enum mma9551_gpio_pin)mma_axis, | |
c78b9171 | 220 | MMA9551_APPID_TILT, bitnum, 0); |
6da93a67 IT |
221 | if (ret < 0) { |
222 | mma9551_set_power_state(data->client, false); | |
c78b9171 | 223 | return ret; |
6da93a67 | 224 | } |
c78b9171 VD |
225 | } |
226 | ||
227 | data->event_enabled[mma_axis] = state; | |
228 | ||
229 | return ret; | |
230 | } | |
231 | ||
232 | static int mma9551_write_event_config(struct iio_dev *indio_dev, | |
233 | const struct iio_chan_spec *chan, | |
234 | enum iio_event_type type, | |
235 | enum iio_event_direction dir, | |
236 | int state) | |
237 | { | |
238 | struct mma9551_data *data = iio_priv(indio_dev); | |
239 | int ret; | |
240 | ||
241 | switch (chan->type) { | |
242 | case IIO_INCLI: | |
243 | mutex_lock(&data->mutex); | |
244 | ret = mma9551_config_incli_event(indio_dev, | |
245 | chan->channel2, state); | |
246 | mutex_unlock(&data->mutex); | |
247 | return ret; | |
248 | default: | |
249 | return -EINVAL; | |
250 | } | |
251 | } | |
252 | ||
253 | static int mma9551_write_event_value(struct iio_dev *indio_dev, | |
254 | const struct iio_chan_spec *chan, | |
255 | enum iio_event_type type, | |
256 | enum iio_event_direction dir, | |
257 | enum iio_event_info info, | |
258 | int val, int val2) | |
259 | { | |
260 | struct mma9551_data *data = iio_priv(indio_dev); | |
261 | int ret; | |
262 | ||
263 | switch (chan->type) { | |
264 | case IIO_INCLI: | |
265 | if (val2 != 0 || val < 1 || val > 10) | |
266 | return -EINVAL; | |
267 | mutex_lock(&data->mutex); | |
268 | ret = mma9551_update_config_bits(data->client, | |
269 | MMA9551_APPID_TILT, | |
270 | MMA9551_TILT_CFG_REG, | |
271 | MMA9551_TILT_ANG_THRESH_MASK, | |
272 | val); | |
273 | mutex_unlock(&data->mutex); | |
274 | return ret; | |
275 | default: | |
276 | return -EINVAL; | |
277 | } | |
278 | } | |
279 | ||
280 | static int mma9551_read_event_value(struct iio_dev *indio_dev, | |
281 | const struct iio_chan_spec *chan, | |
282 | enum iio_event_type type, | |
283 | enum iio_event_direction dir, | |
284 | enum iio_event_info info, | |
285 | int *val, int *val2) | |
286 | { | |
287 | struct mma9551_data *data = iio_priv(indio_dev); | |
288 | int ret; | |
289 | u8 tmp; | |
290 | ||
291 | switch (chan->type) { | |
292 | case IIO_INCLI: | |
293 | mutex_lock(&data->mutex); | |
294 | ret = mma9551_read_config_byte(data->client, | |
295 | MMA9551_APPID_TILT, | |
296 | MMA9551_TILT_CFG_REG, &tmp); | |
297 | mutex_unlock(&data->mutex); | |
298 | if (ret < 0) | |
299 | return ret; | |
300 | *val = tmp & MMA9551_TILT_ANG_THRESH_MASK; | |
301 | *val2 = 0; | |
302 | return IIO_VAL_INT; | |
303 | default: | |
304 | return -EINVAL; | |
305 | } | |
306 | } | |
307 | ||
308 | static const struct iio_event_spec mma9551_incli_event = { | |
309 | .type = IIO_EV_TYPE_ROC, | |
310 | .dir = IIO_EV_DIR_RISING, | |
311 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
312 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE), | |
313 | }; | |
314 | ||
c78b9171 VD |
315 | #define MMA9551_INCLI_CHANNEL(axis) { \ |
316 | .type = IIO_INCLI, \ | |
317 | .modified = 1, \ | |
318 | .channel2 = axis, \ | |
319 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ | |
320 | .event_spec = &mma9551_incli_event, \ | |
321 | .num_event_specs = 1, \ | |
322 | } | |
323 | ||
324 | static const struct iio_chan_spec mma9551_channels[] = { | |
325 | MMA9551_ACCEL_CHANNEL(IIO_MOD_X), | |
326 | MMA9551_ACCEL_CHANNEL(IIO_MOD_Y), | |
327 | MMA9551_ACCEL_CHANNEL(IIO_MOD_Z), | |
328 | ||
329 | MMA9551_INCLI_CHANNEL(IIO_MOD_X), | |
330 | MMA9551_INCLI_CHANNEL(IIO_MOD_Y), | |
331 | MMA9551_INCLI_CHANNEL(IIO_MOD_Z), | |
332 | }; | |
333 | ||
334 | static const struct iio_info mma9551_info = { | |
c78b9171 VD |
335 | .read_raw = mma9551_read_raw, |
336 | .read_event_config = mma9551_read_event_config, | |
337 | .write_event_config = mma9551_write_event_config, | |
338 | .read_event_value = mma9551_read_event_value, | |
339 | .write_event_value = mma9551_write_event_value, | |
340 | }; | |
341 | ||
342 | static irqreturn_t mma9551_event_handler(int irq, void *private) | |
343 | { | |
344 | struct iio_dev *indio_dev = private; | |
345 | struct mma9551_data *data = iio_priv(indio_dev); | |
346 | int i, ret, mma_axis = -1; | |
347 | u16 reg; | |
348 | u8 val; | |
349 | ||
350 | mutex_lock(&data->mutex); | |
351 | ||
352 | for (i = 0; i < 3; i++) | |
353 | if (irq == data->irqs[i]) { | |
354 | mma_axis = i; | |
355 | break; | |
356 | } | |
357 | ||
358 | if (mma_axis == -1) { | |
359 | /* IRQ was triggered on 4th line, which we don't use. */ | |
360 | dev_warn(&data->client->dev, | |
361 | "irq triggered on unused line %d\n", data->irqs[3]); | |
362 | goto out; | |
363 | } | |
364 | ||
365 | switch (mma_axis) { | |
366 | case mma9551_x: | |
367 | reg = MMA9551_TILT_YZ_ANG_REG; | |
368 | break; | |
369 | case mma9551_y: | |
370 | reg = MMA9551_TILT_XZ_ANG_REG; | |
371 | break; | |
372 | case mma9551_z: | |
373 | reg = MMA9551_TILT_XY_ANG_REG; | |
374 | break; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Read the angle even though we don't use it, otherwise we | |
379 | * won't get any further interrupts. | |
380 | */ | |
381 | ret = mma9551_read_status_byte(data->client, MMA9551_APPID_TILT, | |
382 | reg, &val); | |
383 | if (ret < 0) { | |
384 | dev_err(&data->client->dev, | |
385 | "error %d reading tilt register in IRQ\n", ret); | |
386 | goto out; | |
387 | } | |
388 | ||
389 | iio_push_event(indio_dev, | |
390 | IIO_MOD_EVENT_CODE(IIO_INCLI, 0, (mma_axis + 1), | |
391 | IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING), | |
bc2b7dab | 392 | iio_get_time_ns(indio_dev)); |
c78b9171 VD |
393 | |
394 | out: | |
395 | mutex_unlock(&data->mutex); | |
396 | ||
397 | return IRQ_HANDLED; | |
398 | } | |
399 | ||
400 | static int mma9551_init(struct mma9551_data *data) | |
401 | { | |
402 | int ret; | |
403 | ||
404 | ret = mma9551_read_version(data->client); | |
405 | if (ret) | |
406 | return ret; | |
407 | ||
6da93a67 | 408 | return mma9551_set_device_state(data->client, true); |
c78b9171 VD |
409 | } |
410 | ||
411 | static int mma9551_gpio_probe(struct iio_dev *indio_dev) | |
412 | { | |
413 | struct gpio_desc *gpio; | |
414 | int i, ret; | |
415 | struct mma9551_data *data = iio_priv(indio_dev); | |
416 | struct device *dev = &data->client->dev; | |
417 | ||
418 | for (i = 0; i < MMA9551_GPIO_COUNT; i++) { | |
ed3edc09 | 419 | gpio = devm_gpiod_get_index(dev, NULL, i, GPIOD_IN); |
c78b9171 VD |
420 | if (IS_ERR(gpio)) { |
421 | dev_err(dev, "acpi gpio get index failed\n"); | |
422 | return PTR_ERR(gpio); | |
423 | } | |
424 | ||
debf6d84 RD |
425 | ret = gpiod_to_irq(gpio); |
426 | if (ret < 0) | |
427 | return ret; | |
428 | ||
429 | data->irqs[i] = ret; | |
c78b9171 VD |
430 | ret = devm_request_threaded_irq(dev, data->irqs[i], |
431 | NULL, mma9551_event_handler, | |
432 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
433 | MMA9551_IRQ_NAME, indio_dev); | |
434 | if (ret < 0) { | |
435 | dev_err(dev, "request irq %d failed\n", data->irqs[i]); | |
436 | return ret; | |
437 | } | |
438 | ||
439 | dev_dbg(dev, "gpio resource, no:%d irq:%d\n", | |
440 | desc_to_gpio(gpio), data->irqs[i]); | |
441 | } | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
446 | static const char *mma9551_match_acpi_device(struct device *dev) | |
447 | { | |
448 | const struct acpi_device_id *id; | |
449 | ||
450 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
451 | if (!id) | |
452 | return NULL; | |
453 | ||
454 | return dev_name(dev); | |
455 | } | |
456 | ||
457 | static int mma9551_probe(struct i2c_client *client, | |
458 | const struct i2c_device_id *id) | |
459 | { | |
460 | struct mma9551_data *data; | |
461 | struct iio_dev *indio_dev; | |
462 | const char *name = NULL; | |
463 | int ret; | |
464 | ||
465 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
466 | if (!indio_dev) | |
467 | return -ENOMEM; | |
468 | ||
469 | data = iio_priv(indio_dev); | |
470 | i2c_set_clientdata(client, indio_dev); | |
471 | data->client = client; | |
472 | ||
473 | if (id) | |
474 | name = id->name; | |
475 | else if (ACPI_HANDLE(&client->dev)) | |
476 | name = mma9551_match_acpi_device(&client->dev); | |
477 | ||
478 | ret = mma9551_init(data); | |
479 | if (ret < 0) | |
480 | return ret; | |
481 | ||
482 | mutex_init(&data->mutex); | |
483 | ||
484 | indio_dev->dev.parent = &client->dev; | |
485 | indio_dev->channels = mma9551_channels; | |
486 | indio_dev->num_channels = ARRAY_SIZE(mma9551_channels); | |
487 | indio_dev->name = name; | |
488 | indio_dev->modes = INDIO_DIRECT_MODE; | |
489 | indio_dev->info = &mma9551_info; | |
490 | ||
491 | ret = mma9551_gpio_probe(indio_dev); | |
492 | if (ret < 0) | |
493 | goto out_poweroff; | |
494 | ||
6da93a67 IT |
495 | ret = pm_runtime_set_active(&client->dev); |
496 | if (ret < 0) | |
7d0ead5c | 497 | goto out_poweroff; |
6da93a67 IT |
498 | |
499 | pm_runtime_enable(&client->dev); | |
500 | pm_runtime_set_autosuspend_delay(&client->dev, | |
501 | MMA9551_AUTO_SUSPEND_DELAY_MS); | |
502 | pm_runtime_use_autosuspend(&client->dev); | |
503 | ||
7d0ead5c AR |
504 | ret = iio_device_register(indio_dev); |
505 | if (ret < 0) { | |
506 | dev_err(&client->dev, "unable to register iio device\n"); | |
507 | goto out_poweroff; | |
508 | } | |
509 | ||
c78b9171 VD |
510 | return 0; |
511 | ||
512 | out_poweroff: | |
513 | mma9551_set_device_state(client, false); | |
514 | ||
515 | return ret; | |
516 | } | |
517 | ||
518 | static int mma9551_remove(struct i2c_client *client) | |
519 | { | |
520 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
521 | struct mma9551_data *data = iio_priv(indio_dev); | |
522 | ||
7d0ead5c AR |
523 | iio_device_unregister(indio_dev); |
524 | ||
6da93a67 IT |
525 | pm_runtime_disable(&client->dev); |
526 | pm_runtime_set_suspended(&client->dev); | |
527 | pm_runtime_put_noidle(&client->dev); | |
528 | ||
c78b9171 VD |
529 | mutex_lock(&data->mutex); |
530 | mma9551_set_device_state(data->client, false); | |
531 | mutex_unlock(&data->mutex); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
6da93a67 IT |
536 | #ifdef CONFIG_PM |
537 | static int mma9551_runtime_suspend(struct device *dev) | |
538 | { | |
539 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
540 | struct mma9551_data *data = iio_priv(indio_dev); | |
541 | int ret; | |
542 | ||
543 | mutex_lock(&data->mutex); | |
544 | ret = mma9551_set_device_state(data->client, false); | |
545 | mutex_unlock(&data->mutex); | |
546 | if (ret < 0) { | |
547 | dev_err(&data->client->dev, "powering off device failed\n"); | |
548 | return -EAGAIN; | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int mma9551_runtime_resume(struct device *dev) | |
555 | { | |
556 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
557 | struct mma9551_data *data = iio_priv(indio_dev); | |
558 | int ret; | |
559 | ||
560 | ret = mma9551_set_device_state(data->client, true); | |
561 | if (ret < 0) | |
562 | return ret; | |
563 | ||
564 | mma9551_sleep(MMA9551_DEFAULT_SAMPLE_RATE); | |
565 | ||
566 | return 0; | |
567 | } | |
568 | #endif | |
569 | ||
c78b9171 VD |
570 | #ifdef CONFIG_PM_SLEEP |
571 | static int mma9551_suspend(struct device *dev) | |
572 | { | |
573 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
574 | struct mma9551_data *data = iio_priv(indio_dev); | |
6da93a67 | 575 | int ret; |
c78b9171 VD |
576 | |
577 | mutex_lock(&data->mutex); | |
6da93a67 | 578 | ret = mma9551_set_device_state(data->client, false); |
c78b9171 VD |
579 | mutex_unlock(&data->mutex); |
580 | ||
6da93a67 | 581 | return ret; |
c78b9171 VD |
582 | } |
583 | ||
584 | static int mma9551_resume(struct device *dev) | |
585 | { | |
586 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
587 | struct mma9551_data *data = iio_priv(indio_dev); | |
6da93a67 | 588 | int ret; |
c78b9171 VD |
589 | |
590 | mutex_lock(&data->mutex); | |
6da93a67 | 591 | ret = mma9551_set_device_state(data->client, true); |
c78b9171 VD |
592 | mutex_unlock(&data->mutex); |
593 | ||
6da93a67 | 594 | return ret; |
c78b9171 | 595 | } |
c78b9171 VD |
596 | #endif |
597 | ||
598 | static const struct dev_pm_ops mma9551_pm_ops = { | |
599 | SET_SYSTEM_SLEEP_PM_OPS(mma9551_suspend, mma9551_resume) | |
6da93a67 IT |
600 | SET_RUNTIME_PM_OPS(mma9551_runtime_suspend, |
601 | mma9551_runtime_resume, NULL) | |
c78b9171 VD |
602 | }; |
603 | ||
604 | static const struct acpi_device_id mma9551_acpi_match[] = { | |
605 | {"MMA9551", 0}, | |
606 | {}, | |
607 | }; | |
608 | ||
609 | MODULE_DEVICE_TABLE(acpi, mma9551_acpi_match); | |
610 | ||
611 | static const struct i2c_device_id mma9551_id[] = { | |
612 | {"mma9551", 0}, | |
613 | {} | |
614 | }; | |
615 | ||
616 | MODULE_DEVICE_TABLE(i2c, mma9551_id); | |
617 | ||
618 | static struct i2c_driver mma9551_driver = { | |
619 | .driver = { | |
620 | .name = MMA9551_DRV_NAME, | |
621 | .acpi_match_table = ACPI_PTR(mma9551_acpi_match), | |
622 | .pm = &mma9551_pm_ops, | |
623 | }, | |
624 | .probe = mma9551_probe, | |
625 | .remove = mma9551_remove, | |
626 | .id_table = mma9551_id, | |
627 | }; | |
628 | ||
629 | module_i2c_driver(mma9551_driver); | |
630 | ||
631 | MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>"); | |
632 | MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); | |
633 | MODULE_LICENSE("GPL v2"); | |
634 | MODULE_DESCRIPTION("MMA9551L motion-sensing platform driver"); |