1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * MMC35240 - MEMSIC 3-axis Magnetic Sensor |
4 | * |
5 | * Copyright (c) 2015, Intel Corporation. |
6 | * |
7 | * IIO driver for MMC35240 (7-bit I2C slave address 0x30). |
8 | * |
9 | * TODO: offset, ACPI, continuous measurement mode, PM |
10 | */ |
11 | |
12 | #include <linux/module.h> |
13 | #include <linux/mod_devicetable.h> |
14 | #include <linux/init.h> |
15 | #include <linux/i2c.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/regmap.h> |
18 | #include <linux/pm.h> |
19 | |
20 | #include <linux/iio/iio.h> |
21 | #include <linux/iio/sysfs.h> |
22 | |
23 | #define MMC35240_DRV_NAME "mmc35240" |
24 | #define MMC35240_REGMAP_NAME "mmc35240_regmap" |
25 | |
26 | #define MMC35240_REG_XOUT_L 0x00 |
27 | #define MMC35240_REG_XOUT_H 0x01 |
28 | #define MMC35240_REG_YOUT_L 0x02 |
29 | #define MMC35240_REG_YOUT_H 0x03 |
30 | #define MMC35240_REG_ZOUT_L 0x04 |
31 | #define MMC35240_REG_ZOUT_H 0x05 |
32 | |
33 | #define MMC35240_REG_STATUS 0x06 |
34 | #define MMC35240_REG_CTRL0 0x07 |
35 | #define MMC35240_REG_CTRL1 0x08 |
36 | |
37 | #define MMC35240_REG_ID 0x20 |
38 | |
39 | #define MMC35240_STATUS_MEAS_DONE_BIT BIT(0) |
40 | |
41 | #define MMC35240_CTRL0_REFILL_BIT BIT(7) |
42 | #define MMC35240_CTRL0_RESET_BIT BIT(6) |
43 | #define MMC35240_CTRL0_SET_BIT BIT(5) |
44 | #define MMC35240_CTRL0_CMM_BIT BIT(1) |
45 | #define MMC35240_CTRL0_TM_BIT BIT(0) |
46 | |
47 | /* output resolution bits */ |
48 | #define MMC35240_CTRL1_BW0_BIT BIT(0) |
49 | #define MMC35240_CTRL1_BW1_BIT BIT(1) |
50 | |
51 | #define MMC35240_CTRL1_BW_MASK (MMC35240_CTRL1_BW0_BIT | \ |
52 | MMC35240_CTRL1_BW1_BIT) |
53 | #define MMC35240_CTRL1_BW_SHIFT 0 |
54 | |
55 | #define MMC35240_WAIT_CHARGE_PUMP 50000 /* us */ |
56 | #define MMC35240_WAIT_SET_RESET 1000 /* us */ |
57 | |
58 | /* |
59 | * Memsic OTP process code piece is put here for reference: |
60 | * |
61 | * #define OTP_CONVERT(REG) ((float)((REG) >=32 ? (32 - (REG)) : (REG)) * 0.006 |
62 | * 1) For X axis, the COEFFICIENT is always 1. |
63 | * 2) For Y axis, the COEFFICIENT is as below: |
64 | * f_OTP_matrix[4] = OTP_CONVERT(((reg_data[1] & 0x03) << 4) | |
65 | * (reg_data[2] >> 4)) + 1.0; |
66 | * 3) For Z axis, the COEFFICIENT is as below: |
67 | * f_OTP_matrix[8] = (OTP_CONVERT(reg_data[3] & 0x3f) + 1) * 1.35; |
68 | * We implemented the OTP logic into driver. |
69 | */ |
70 | |
71 | /* scale = 1000 here for Y otp */ |
72 | #define MMC35240_OTP_CONVERT_Y(REG) (((REG) >= 32 ? (32 - (REG)) : (REG)) * 6) |
73 | |
74 | /* 0.6 * 1.35 = 0.81, scale 10000 for Z otp */ |
75 | #define MMC35240_OTP_CONVERT_Z(REG) (((REG) >= 32 ? (32 - (REG)) : (REG)) * 81) |
76 | |
77 | #define MMC35240_X_COEFF(x) (x) |
78 | #define MMC35240_Y_COEFF(y) (y + 1000) |
79 | #define MMC35240_Z_COEFF(z) (z + 13500) |
80 | |
81 | #define MMC35240_OTP_START_ADDR 0x1B |
82 | |
83 | enum mmc35240_resolution { |
84 | MMC35240_16_BITS_SLOW = 0, /* 7.92 ms */ |
85 | MMC35240_16_BITS_FAST, /* 4.08 ms */ |
86 | MMC35240_14_BITS, /* 2.16 ms */ |
87 | MMC35240_12_BITS, /* 1.20 ms */ |
88 | }; |
89 | |
90 | enum mmc35240_axis { |
91 | AXIS_X = 0, |
92 | AXIS_Y, |
93 | AXIS_Z, |
94 | }; |
95 | |
96 | static const struct { |
97 | int sens[3]; /* sensitivity per X, Y, Z axis */ |
98 | int nfo; /* null field output */ |
99 | } mmc35240_props_table[] = { |
100 | /* 16 bits, 125Hz ODR */ |
101 | { |
102 | {1024, 1024, 1024}, |
103 | 32768, |
104 | }, |
105 | /* 16 bits, 250Hz ODR */ |
106 | { |
107 | {1024, 1024, 770}, |
108 | 32768, |
109 | }, |
110 | /* 14 bits, 450Hz ODR */ |
111 | { |
112 | {256, 256, 193}, |
113 | 8192, |
114 | }, |
115 | /* 12 bits, 800Hz ODR */ |
116 | { |
117 | {64, 64, 48}, |
118 | 2048, |
119 | }, |
120 | }; |
121 | |
122 | struct mmc35240_data { |
123 | struct i2c_client *client; |
124 | struct mutex mutex; |
125 | struct regmap *regmap; |
126 | enum mmc35240_resolution res; |
127 | |
128 | /* OTP compensation */ |
129 | int axis_coef[3]; |
130 | int axis_scale[3]; |
131 | }; |
132 | |
133 | static const struct { |
134 | int val; |
135 | int val2; |
136 | } mmc35240_samp_freq[] = { {1, 500000}, |
137 | {13, 0}, |
138 | {25, 0}, |
139 | {50, 0} }; |
140 | |
141 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("1.5 13 25 50" ); |
142 | |
143 | #define MMC35240_CHANNEL(_axis) { \ |
144 | .type = IIO_MAGN, \ |
145 | .modified = 1, \ |
146 | .channel2 = IIO_MOD_ ## _axis, \ |
147 | .address = AXIS_ ## _axis, \ |
148 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
149 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ |
150 | BIT(IIO_CHAN_INFO_SCALE), \ |
151 | } |
152 | |
153 | static const struct iio_chan_spec mmc35240_channels[] = { |
154 | MMC35240_CHANNEL(X), |
155 | MMC35240_CHANNEL(Y), |
156 | MMC35240_CHANNEL(Z), |
157 | }; |
158 | |
159 | static struct attribute *mmc35240_attributes[] = { |
160 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
161 | NULL |
162 | }; |
163 | |
164 | static const struct attribute_group mmc35240_attribute_group = { |
165 | .attrs = mmc35240_attributes, |
166 | }; |
167 | |
168 | static int mmc35240_get_samp_freq_index(struct mmc35240_data *data, |
169 | int val, int val2) |
170 | { |
171 | int i; |
172 | |
173 | for (i = 0; i < ARRAY_SIZE(mmc35240_samp_freq); i++) |
174 | if (mmc35240_samp_freq[i].val == val && |
175 | mmc35240_samp_freq[i].val2 == val2) |
176 | return i; |
177 | return -EINVAL; |
178 | } |
179 | |
180 | static int mmc35240_hw_set(struct mmc35240_data *data, bool set) |
181 | { |
182 | int ret; |
183 | u8 coil_bit; |
184 | |
185 | /* |
186 | * Recharge the capacitor at VCAP pin, requested to be issued |
187 | * before a SET/RESET command. |
188 | */ |
189 | ret = regmap_update_bits(map: data->regmap, MMC35240_REG_CTRL0, |
190 | MMC35240_CTRL0_REFILL_BIT, |
191 | MMC35240_CTRL0_REFILL_BIT); |
192 | if (ret < 0) |
193 | return ret; |
194 | usleep_range(MMC35240_WAIT_CHARGE_PUMP, MMC35240_WAIT_CHARGE_PUMP + 1); |
195 | |
196 | if (set) |
197 | coil_bit = MMC35240_CTRL0_SET_BIT; |
198 | else |
199 | coil_bit = MMC35240_CTRL0_RESET_BIT; |
200 | |
201 | return regmap_update_bits(map: data->regmap, MMC35240_REG_CTRL0, |
202 | mask: coil_bit, val: coil_bit); |
203 | |
204 | } |
205 | |
206 | static int mmc35240_init(struct mmc35240_data *data) |
207 | { |
208 | int ret, y_convert, z_convert; |
209 | unsigned int reg_id; |
210 | u8 otp_data[6]; |
211 | |
212 | ret = regmap_read(map: data->regmap, MMC35240_REG_ID, val: ®_id); |
213 | if (ret < 0) { |
214 | dev_err(&data->client->dev, "Error reading product id\n" ); |
215 | return ret; |
216 | } |
217 | |
218 | dev_dbg(&data->client->dev, "MMC35240 chip id %x\n" , reg_id); |
219 | |
220 | /* |
221 | * make sure we restore sensor characteristics, by doing |
222 | * a SET/RESET sequence, the axis polarity being naturally |
223 | * aligned after RESET |
224 | */ |
225 | ret = mmc35240_hw_set(data, set: true); |
226 | if (ret < 0) |
227 | return ret; |
228 | usleep_range(MMC35240_WAIT_SET_RESET, MMC35240_WAIT_SET_RESET + 1); |
229 | |
230 | ret = mmc35240_hw_set(data, set: false); |
231 | if (ret < 0) |
232 | return ret; |
233 | |
234 | /* set default sampling frequency */ |
235 | ret = regmap_update_bits(map: data->regmap, MMC35240_REG_CTRL1, |
236 | MMC35240_CTRL1_BW_MASK, |
237 | val: data->res << MMC35240_CTRL1_BW_SHIFT); |
238 | if (ret < 0) |
239 | return ret; |
240 | |
241 | ret = regmap_bulk_read(map: data->regmap, MMC35240_OTP_START_ADDR, |
242 | val: otp_data, val_count: sizeof(otp_data)); |
243 | if (ret < 0) |
244 | return ret; |
245 | |
246 | y_convert = MMC35240_OTP_CONVERT_Y(((otp_data[1] & 0x03) << 4) | |
247 | (otp_data[2] >> 4)); |
248 | z_convert = MMC35240_OTP_CONVERT_Z(otp_data[3] & 0x3f); |
249 | |
250 | data->axis_coef[0] = MMC35240_X_COEFF(1); |
251 | data->axis_coef[1] = MMC35240_Y_COEFF(y_convert); |
252 | data->axis_coef[2] = MMC35240_Z_COEFF(z_convert); |
253 | |
254 | data->axis_scale[0] = 1; |
255 | data->axis_scale[1] = 1000; |
256 | data->axis_scale[2] = 10000; |
257 | |
258 | return 0; |
259 | } |
260 | |
261 | static int mmc35240_take_measurement(struct mmc35240_data *data) |
262 | { |
263 | int ret, tries = 100; |
264 | unsigned int reg_status; |
265 | |
266 | ret = regmap_write(map: data->regmap, MMC35240_REG_CTRL0, |
267 | MMC35240_CTRL0_TM_BIT); |
268 | if (ret < 0) |
269 | return ret; |
270 | |
271 | while (tries-- > 0) { |
272 | ret = regmap_read(map: data->regmap, MMC35240_REG_STATUS, |
273 | val: ®_status); |
274 | if (ret < 0) |
275 | return ret; |
276 | if (reg_status & MMC35240_STATUS_MEAS_DONE_BIT) |
277 | break; |
278 | /* minimum wait time to complete measurement is 10 ms */ |
279 | usleep_range(min: 10000, max: 11000); |
280 | } |
281 | |
282 | if (tries < 0) { |
283 | dev_err(&data->client->dev, "data not ready\n" ); |
284 | return -EIO; |
285 | } |
286 | |
287 | return 0; |
288 | } |
289 | |
290 | static int mmc35240_read_measurement(struct mmc35240_data *data, __le16 buf[3]) |
291 | { |
292 | int ret; |
293 | |
294 | ret = mmc35240_take_measurement(data); |
295 | if (ret < 0) |
296 | return ret; |
297 | |
298 | return regmap_bulk_read(map: data->regmap, MMC35240_REG_XOUT_L, val: buf, |
299 | val_count: 3 * sizeof(__le16)); |
300 | } |
301 | |
302 | /** |
303 | * mmc35240_raw_to_mgauss - convert raw readings to milli gauss. Also apply |
304 | * compensation for output value. |
305 | * |
306 | * @data: device private data |
307 | * @index: axis index for which we want the conversion |
308 | * @buf: raw data to be converted, 2 bytes in little endian format |
309 | * @val: compensated output reading (unit is milli gauss) |
310 | * |
311 | * Returns: 0 in case of success, -EINVAL when @index is not valid |
312 | */ |
313 | static int mmc35240_raw_to_mgauss(struct mmc35240_data *data, int index, |
314 | __le16 buf[], int *val) |
315 | { |
316 | int raw[3]; |
317 | int sens[3]; |
318 | int nfo; |
319 | |
320 | raw[AXIS_X] = le16_to_cpu(buf[AXIS_X]); |
321 | raw[AXIS_Y] = le16_to_cpu(buf[AXIS_Y]); |
322 | raw[AXIS_Z] = le16_to_cpu(buf[AXIS_Z]); |
323 | |
324 | sens[AXIS_X] = mmc35240_props_table[data->res].sens[AXIS_X]; |
325 | sens[AXIS_Y] = mmc35240_props_table[data->res].sens[AXIS_Y]; |
326 | sens[AXIS_Z] = mmc35240_props_table[data->res].sens[AXIS_Z]; |
327 | |
328 | nfo = mmc35240_props_table[data->res].nfo; |
329 | |
330 | switch (index) { |
331 | case AXIS_X: |
332 | *val = (raw[AXIS_X] - nfo) * 1000 / sens[AXIS_X]; |
333 | break; |
334 | case AXIS_Y: |
335 | *val = (raw[AXIS_Y] - nfo) * 1000 / sens[AXIS_Y] - |
336 | (raw[AXIS_Z] - nfo) * 1000 / sens[AXIS_Z]; |
337 | break; |
338 | case AXIS_Z: |
339 | *val = (raw[AXIS_Y] - nfo) * 1000 / sens[AXIS_Y] + |
340 | (raw[AXIS_Z] - nfo) * 1000 / sens[AXIS_Z]; |
341 | break; |
342 | default: |
343 | return -EINVAL; |
344 | } |
345 | /* apply OTP compensation */ |
346 | *val = (*val) * data->axis_coef[index] / data->axis_scale[index]; |
347 | |
348 | return 0; |
349 | } |
350 | |
351 | static int mmc35240_read_raw(struct iio_dev *indio_dev, |
352 | struct iio_chan_spec const *chan, int *val, |
353 | int *val2, long mask) |
354 | { |
355 | struct mmc35240_data *data = iio_priv(indio_dev); |
356 | int ret, i; |
357 | unsigned int reg; |
358 | __le16 buf[3]; |
359 | |
360 | switch (mask) { |
361 | case IIO_CHAN_INFO_RAW: |
362 | mutex_lock(&data->mutex); |
363 | ret = mmc35240_read_measurement(data, buf); |
364 | mutex_unlock(lock: &data->mutex); |
365 | if (ret < 0) |
366 | return ret; |
367 | ret = mmc35240_raw_to_mgauss(data, index: chan->address, buf, val); |
368 | if (ret < 0) |
369 | return ret; |
370 | return IIO_VAL_INT; |
371 | case IIO_CHAN_INFO_SCALE: |
372 | *val = 0; |
373 | *val2 = 1000; |
374 | return IIO_VAL_INT_PLUS_MICRO; |
375 | case IIO_CHAN_INFO_SAMP_FREQ: |
376 | mutex_lock(&data->mutex); |
377 | ret = regmap_read(map: data->regmap, MMC35240_REG_CTRL1, val: ®); |
378 | mutex_unlock(lock: &data->mutex); |
379 | if (ret < 0) |
380 | return ret; |
381 | |
382 | i = (reg & MMC35240_CTRL1_BW_MASK) >> MMC35240_CTRL1_BW_SHIFT; |
383 | if (i < 0 || i >= ARRAY_SIZE(mmc35240_samp_freq)) |
384 | return -EINVAL; |
385 | |
386 | *val = mmc35240_samp_freq[i].val; |
387 | *val2 = mmc35240_samp_freq[i].val2; |
388 | return IIO_VAL_INT_PLUS_MICRO; |
389 | default: |
390 | return -EINVAL; |
391 | } |
392 | } |
393 | |
394 | static int mmc35240_write_raw(struct iio_dev *indio_dev, |
395 | struct iio_chan_spec const *chan, int val, |
396 | int val2, long mask) |
397 | { |
398 | struct mmc35240_data *data = iio_priv(indio_dev); |
399 | int i, ret; |
400 | |
401 | switch (mask) { |
402 | case IIO_CHAN_INFO_SAMP_FREQ: |
403 | i = mmc35240_get_samp_freq_index(data, val, val2); |
404 | if (i < 0) |
405 | return -EINVAL; |
406 | mutex_lock(&data->mutex); |
407 | ret = regmap_update_bits(map: data->regmap, MMC35240_REG_CTRL1, |
408 | MMC35240_CTRL1_BW_MASK, |
409 | val: i << MMC35240_CTRL1_BW_SHIFT); |
410 | mutex_unlock(lock: &data->mutex); |
411 | return ret; |
412 | default: |
413 | return -EINVAL; |
414 | } |
415 | } |
416 | |
417 | static const struct iio_info mmc35240_info = { |
418 | .read_raw = mmc35240_read_raw, |
419 | .write_raw = mmc35240_write_raw, |
420 | .attrs = &mmc35240_attribute_group, |
421 | }; |
422 | |
423 | static bool mmc35240_is_writeable_reg(struct device *dev, unsigned int reg) |
424 | { |
425 | switch (reg) { |
426 | case MMC35240_REG_CTRL0: |
427 | case MMC35240_REG_CTRL1: |
428 | return true; |
429 | default: |
430 | return false; |
431 | } |
432 | } |
433 | |
434 | static bool mmc35240_is_readable_reg(struct device *dev, unsigned int reg) |
435 | { |
436 | switch (reg) { |
437 | case MMC35240_REG_XOUT_L: |
438 | case MMC35240_REG_XOUT_H: |
439 | case MMC35240_REG_YOUT_L: |
440 | case MMC35240_REG_YOUT_H: |
441 | case MMC35240_REG_ZOUT_L: |
442 | case MMC35240_REG_ZOUT_H: |
443 | case MMC35240_REG_STATUS: |
444 | case MMC35240_REG_ID: |
445 | return true; |
446 | default: |
447 | return false; |
448 | } |
449 | } |
450 | |
451 | static bool mmc35240_is_volatile_reg(struct device *dev, unsigned int reg) |
452 | { |
453 | switch (reg) { |
454 | case MMC35240_REG_CTRL0: |
455 | case MMC35240_REG_CTRL1: |
456 | return false; |
457 | default: |
458 | return true; |
459 | } |
460 | } |
461 | |
462 | static const struct reg_default mmc35240_reg_defaults[] = { |
463 | { MMC35240_REG_CTRL0, 0x00 }, |
464 | { MMC35240_REG_CTRL1, 0x00 }, |
465 | }; |
466 | |
467 | static const struct regmap_config mmc35240_regmap_config = { |
468 | .name = MMC35240_REGMAP_NAME, |
469 | |
470 | .reg_bits = 8, |
471 | .val_bits = 8, |
472 | |
473 | .max_register = MMC35240_REG_ID, |
474 | .cache_type = REGCACHE_FLAT, |
475 | |
476 | .writeable_reg = mmc35240_is_writeable_reg, |
477 | .readable_reg = mmc35240_is_readable_reg, |
478 | .volatile_reg = mmc35240_is_volatile_reg, |
479 | |
480 | .reg_defaults = mmc35240_reg_defaults, |
481 | .num_reg_defaults = ARRAY_SIZE(mmc35240_reg_defaults), |
482 | }; |
483 | |
484 | static int mmc35240_probe(struct i2c_client *client) |
485 | { |
486 | struct mmc35240_data *data; |
487 | struct iio_dev *indio_dev; |
488 | struct regmap *regmap; |
489 | int ret; |
490 | |
491 | indio_dev = devm_iio_device_alloc(parent: &client->dev, sizeof_priv: sizeof(*data)); |
492 | if (!indio_dev) |
493 | return -ENOMEM; |
494 | |
495 | regmap = devm_regmap_init_i2c(client, &mmc35240_regmap_config); |
496 | if (IS_ERR(ptr: regmap)) { |
497 | dev_err(&client->dev, "regmap initialization failed\n" ); |
498 | return PTR_ERR(ptr: regmap); |
499 | } |
500 | |
501 | data = iio_priv(indio_dev); |
502 | i2c_set_clientdata(client, data: indio_dev); |
503 | data->client = client; |
504 | data->regmap = regmap; |
505 | data->res = MMC35240_16_BITS_SLOW; |
506 | |
507 | mutex_init(&data->mutex); |
508 | |
509 | indio_dev->info = &mmc35240_info; |
510 | indio_dev->name = MMC35240_DRV_NAME; |
511 | indio_dev->channels = mmc35240_channels; |
512 | indio_dev->num_channels = ARRAY_SIZE(mmc35240_channels); |
513 | indio_dev->modes = INDIO_DIRECT_MODE; |
514 | |
515 | ret = mmc35240_init(data); |
516 | if (ret < 0) { |
517 | dev_err(&client->dev, "mmc35240 chip init failed\n" ); |
518 | return ret; |
519 | } |
520 | return devm_iio_device_register(&client->dev, indio_dev); |
521 | } |
522 | |
523 | static int mmc35240_suspend(struct device *dev) |
524 | { |
525 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
526 | struct mmc35240_data *data = iio_priv(indio_dev); |
527 | |
528 | regcache_cache_only(map: data->regmap, enable: true); |
529 | |
530 | return 0; |
531 | } |
532 | |
533 | static int mmc35240_resume(struct device *dev) |
534 | { |
535 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
536 | struct mmc35240_data *data = iio_priv(indio_dev); |
537 | int ret; |
538 | |
539 | regcache_mark_dirty(map: data->regmap); |
540 | ret = regcache_sync_region(map: data->regmap, MMC35240_REG_CTRL0, |
541 | MMC35240_REG_CTRL1); |
542 | if (ret < 0) |
543 | dev_err(dev, "Failed to restore control registers\n" ); |
544 | |
545 | regcache_cache_only(map: data->regmap, enable: false); |
546 | |
547 | return 0; |
548 | } |
549 | |
550 | static DEFINE_SIMPLE_DEV_PM_OPS(mmc35240_pm_ops, mmc35240_suspend, |
551 | mmc35240_resume); |
552 | |
553 | static const struct of_device_id mmc35240_of_match[] = { |
554 | { .compatible = "memsic,mmc35240" , }, |
555 | { } |
556 | }; |
557 | MODULE_DEVICE_TABLE(of, mmc35240_of_match); |
558 | |
559 | static const struct acpi_device_id mmc35240_acpi_match[] = { |
560 | {"MMC35240" , 0}, |
561 | { }, |
562 | }; |
563 | MODULE_DEVICE_TABLE(acpi, mmc35240_acpi_match); |
564 | |
565 | static const struct i2c_device_id mmc35240_id[] = { |
566 | {"mmc35240" , 0}, |
567 | {} |
568 | }; |
569 | MODULE_DEVICE_TABLE(i2c, mmc35240_id); |
570 | |
571 | static struct i2c_driver mmc35240_driver = { |
572 | .driver = { |
573 | .name = MMC35240_DRV_NAME, |
574 | .of_match_table = mmc35240_of_match, |
575 | .pm = pm_sleep_ptr(&mmc35240_pm_ops), |
576 | .acpi_match_table = mmc35240_acpi_match, |
577 | }, |
578 | .probe = mmc35240_probe, |
579 | .id_table = mmc35240_id, |
580 | }; |
581 | |
582 | module_i2c_driver(mmc35240_driver); |
583 | |
584 | MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>" ); |
585 | MODULE_DESCRIPTION("MEMSIC MMC35240 magnetic sensor driver" ); |
586 | MODULE_LICENSE("GPL v2" ); |
587 | |