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94042874 RK |
1 | /* |
2 | * A iio driver for the light sensor ISL 29018. | |
3 | * | |
4 | * IIO driver for monitoring ambient light intensity in luxi, proximity | |
5 | * sensing and infrared sensing. | |
6 | * | |
7 | * Copyright (c) 2010, NVIDIA Corporation. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
17 | * more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/i2c.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/mutex.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/slab.h> | |
30 | #include "../iio.h" | |
9dd1cb30 | 31 | #include "../sysfs.h" |
94042874 RK |
32 | #define CONVERSION_TIME_MS 100 |
33 | ||
34 | #define ISL29018_REG_ADD_COMMAND1 0x00 | |
35 | #define COMMMAND1_OPMODE_SHIFT 5 | |
36 | #define COMMMAND1_OPMODE_MASK (7 << COMMMAND1_OPMODE_SHIFT) | |
37 | #define COMMMAND1_OPMODE_POWER_DOWN 0 | |
38 | #define COMMMAND1_OPMODE_ALS_ONCE 1 | |
39 | #define COMMMAND1_OPMODE_IR_ONCE 2 | |
40 | #define COMMMAND1_OPMODE_PROX_ONCE 3 | |
41 | ||
42 | #define ISL29018_REG_ADD_COMMANDII 0x01 | |
43 | #define COMMANDII_RESOLUTION_SHIFT 2 | |
44 | #define COMMANDII_RESOLUTION_MASK (0x3 << COMMANDII_RESOLUTION_SHIFT) | |
45 | ||
46 | #define COMMANDII_RANGE_SHIFT 0 | |
47 | #define COMMANDII_RANGE_MASK (0x3 << COMMANDII_RANGE_SHIFT) | |
48 | ||
49 | #define COMMANDII_SCHEME_SHIFT 7 | |
50 | #define COMMANDII_SCHEME_MASK (0x1 << COMMANDII_SCHEME_SHIFT) | |
51 | ||
52 | #define ISL29018_REG_ADD_DATA_LSB 0x02 | |
53 | #define ISL29018_REG_ADD_DATA_MSB 0x03 | |
25d7315a | 54 | #define ISL29018_MAX_REGS (ISL29018_REG_ADD_DATA_MSB+1) |
94042874 | 55 | |
176f9f29 GG |
56 | #define ISL29018_REG_TEST 0x08 |
57 | #define ISL29018_TEST_SHIFT 0 | |
58 | #define ISL29018_TEST_MASK (0xFF << ISL29018_TEST_SHIFT) | |
59 | ||
94042874 | 60 | struct isl29018_chip { |
94042874 RK |
61 | struct i2c_client *client; |
62 | struct mutex lock; | |
6d1ad0f8 | 63 | unsigned int lux_scale; |
94042874 RK |
64 | unsigned int range; |
65 | unsigned int adc_bit; | |
66 | int prox_scheme; | |
67 | u8 reg_cache[ISL29018_MAX_REGS]; | |
68 | }; | |
69 | ||
70 | static int isl29018_write_data(struct i2c_client *client, u8 reg, | |
71 | u8 val, u8 mask, u8 shift) | |
72 | { | |
25d7315a JC |
73 | u8 regval = val; |
74 | int ret; | |
152d52cf | 75 | struct isl29018_chip *chip = iio_priv(i2c_get_clientdata(client)); |
94042874 | 76 | |
25d7315a JC |
77 | /* don't cache or mask REG_TEST */ |
78 | if (reg < ISL29018_MAX_REGS) { | |
79 | regval = chip->reg_cache[reg]; | |
80 | regval &= ~mask; | |
81 | regval |= val << shift; | |
82 | } | |
94042874 RK |
83 | |
84 | ret = i2c_smbus_write_byte_data(client, reg, regval); | |
85 | if (ret) { | |
86 | dev_err(&client->dev, "Write to device fails status %x\n", ret); | |
25d7315a JC |
87 | } else { |
88 | /* don't update cache on err */ | |
89 | if (reg < ISL29018_MAX_REGS) | |
90 | chip->reg_cache[reg] = regval; | |
94042874 | 91 | } |
94042874 | 92 | |
25d7315a | 93 | return ret; |
94042874 RK |
94 | } |
95 | ||
96 | static int isl29018_set_range(struct i2c_client *client, unsigned long range, | |
97 | unsigned int *new_range) | |
98 | { | |
99 | static const unsigned long supp_ranges[] = {1000, 4000, 16000, 64000}; | |
100 | int i; | |
101 | ||
102 | for (i = 0; i < ARRAY_SIZE(supp_ranges); ++i) { | |
103 | if (range <= supp_ranges[i]) { | |
104 | *new_range = (unsigned int)supp_ranges[i]; | |
105 | break; | |
106 | } | |
107 | } | |
108 | ||
109 | if (i >= ARRAY_SIZE(supp_ranges)) | |
110 | return -EINVAL; | |
111 | ||
112 | return isl29018_write_data(client, ISL29018_REG_ADD_COMMANDII, | |
113 | i, COMMANDII_RANGE_MASK, COMMANDII_RANGE_SHIFT); | |
114 | } | |
115 | ||
116 | static int isl29018_set_resolution(struct i2c_client *client, | |
117 | unsigned long adcbit, unsigned int *conf_adc_bit) | |
118 | { | |
119 | static const unsigned long supp_adcbit[] = {16, 12, 8, 4}; | |
120 | int i; | |
121 | ||
122 | for (i = 0; i < ARRAY_SIZE(supp_adcbit); ++i) { | |
123 | if (adcbit >= supp_adcbit[i]) { | |
124 | *conf_adc_bit = (unsigned int)supp_adcbit[i]; | |
125 | break; | |
126 | } | |
127 | } | |
128 | ||
129 | if (i >= ARRAY_SIZE(supp_adcbit)) | |
130 | return -EINVAL; | |
131 | ||
132 | return isl29018_write_data(client, ISL29018_REG_ADD_COMMANDII, | |
133 | i, COMMANDII_RESOLUTION_MASK, | |
134 | COMMANDII_RESOLUTION_SHIFT); | |
135 | } | |
136 | ||
137 | static int isl29018_read_sensor_input(struct i2c_client *client, int mode) | |
138 | { | |
139 | int status; | |
140 | int lsb; | |
141 | int msb; | |
142 | ||
143 | /* Set mode */ | |
144 | status = isl29018_write_data(client, ISL29018_REG_ADD_COMMAND1, | |
145 | mode, COMMMAND1_OPMODE_MASK, COMMMAND1_OPMODE_SHIFT); | |
146 | if (status) { | |
147 | dev_err(&client->dev, "Error in setting operating mode\n"); | |
148 | return status; | |
149 | } | |
150 | msleep(CONVERSION_TIME_MS); | |
151 | lsb = i2c_smbus_read_byte_data(client, ISL29018_REG_ADD_DATA_LSB); | |
152 | if (lsb < 0) { | |
153 | dev_err(&client->dev, "Error in reading LSB DATA\n"); | |
154 | return lsb; | |
155 | } | |
156 | ||
157 | msb = i2c_smbus_read_byte_data(client, ISL29018_REG_ADD_DATA_MSB); | |
158 | if (msb < 0) { | |
159 | dev_err(&client->dev, "Error in reading MSB DATA\n"); | |
160 | return msb; | |
161 | } | |
162 | dev_vdbg(&client->dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb); | |
163 | ||
164 | return (msb << 8) | lsb; | |
165 | } | |
166 | ||
167 | static int isl29018_read_lux(struct i2c_client *client, int *lux) | |
168 | { | |
169 | int lux_data; | |
152d52cf | 170 | struct isl29018_chip *chip = iio_priv(i2c_get_clientdata(client)); |
94042874 RK |
171 | |
172 | lux_data = isl29018_read_sensor_input(client, | |
173 | COMMMAND1_OPMODE_ALS_ONCE); | |
174 | ||
175 | if (lux_data < 0) | |
176 | return lux_data; | |
177 | ||
6d1ad0f8 | 178 | *lux = (lux_data * chip->range * chip->lux_scale) >> chip->adc_bit; |
94042874 RK |
179 | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static int isl29018_read_ir(struct i2c_client *client, int *ir) | |
184 | { | |
185 | int ir_data; | |
186 | ||
187 | ir_data = isl29018_read_sensor_input(client, COMMMAND1_OPMODE_IR_ONCE); | |
188 | ||
189 | if (ir_data < 0) | |
190 | return ir_data; | |
191 | ||
192 | *ir = ir_data; | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | static int isl29018_read_proximity_ir(struct i2c_client *client, int scheme, | |
198 | int *near_ir) | |
199 | { | |
200 | int status; | |
201 | int prox_data = -1; | |
202 | int ir_data = -1; | |
203 | ||
204 | /* Do proximity sensing with required scheme */ | |
205 | status = isl29018_write_data(client, ISL29018_REG_ADD_COMMANDII, | |
206 | scheme, COMMANDII_SCHEME_MASK, COMMANDII_SCHEME_SHIFT); | |
207 | if (status) { | |
208 | dev_err(&client->dev, "Error in setting operating mode\n"); | |
209 | return status; | |
210 | } | |
211 | ||
212 | prox_data = isl29018_read_sensor_input(client, | |
213 | COMMMAND1_OPMODE_PROX_ONCE); | |
214 | if (prox_data < 0) | |
215 | return prox_data; | |
216 | ||
217 | if (scheme == 1) { | |
218 | *near_ir = prox_data; | |
219 | return 0; | |
220 | } | |
221 | ||
222 | ir_data = isl29018_read_sensor_input(client, | |
223 | COMMMAND1_OPMODE_IR_ONCE); | |
224 | ||
225 | if (ir_data < 0) | |
226 | return ir_data; | |
227 | ||
228 | if (prox_data >= ir_data) | |
229 | *near_ir = prox_data - ir_data; | |
230 | else | |
231 | *near_ir = 0; | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
94042874 RK |
236 | /* Sysfs interface */ |
237 | /* range */ | |
238 | static ssize_t show_range(struct device *dev, | |
239 | struct device_attribute *attr, char *buf) | |
240 | { | |
241 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
927afbec | 242 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 RK |
243 | |
244 | return sprintf(buf, "%u\n", chip->range); | |
245 | } | |
246 | ||
247 | static ssize_t store_range(struct device *dev, | |
248 | struct device_attribute *attr, const char *buf, size_t count) | |
249 | { | |
250 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
927afbec | 251 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 RK |
252 | struct i2c_client *client = chip->client; |
253 | int status; | |
254 | unsigned long lval; | |
255 | unsigned int new_range; | |
256 | ||
257 | if (strict_strtoul(buf, 10, &lval)) | |
258 | return -EINVAL; | |
259 | ||
260 | if (!(lval == 1000UL || lval == 4000UL || | |
261 | lval == 16000UL || lval == 64000UL)) { | |
262 | dev_err(dev, "The range is not supported\n"); | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | mutex_lock(&chip->lock); | |
267 | status = isl29018_set_range(client, lval, &new_range); | |
268 | if (status < 0) { | |
269 | mutex_unlock(&chip->lock); | |
270 | dev_err(dev, "Error in setting max range\n"); | |
271 | return status; | |
272 | } | |
273 | chip->range = new_range; | |
274 | mutex_unlock(&chip->lock); | |
275 | ||
276 | return count; | |
277 | } | |
278 | ||
279 | /* resolution */ | |
280 | static ssize_t show_resolution(struct device *dev, | |
281 | struct device_attribute *attr, char *buf) | |
282 | { | |
283 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
927afbec | 284 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 RK |
285 | |
286 | return sprintf(buf, "%u\n", chip->adc_bit); | |
287 | } | |
288 | ||
289 | static ssize_t store_resolution(struct device *dev, | |
290 | struct device_attribute *attr, const char *buf, size_t count) | |
291 | { | |
292 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
927afbec | 293 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 RK |
294 | struct i2c_client *client = chip->client; |
295 | int status; | |
296 | unsigned long lval; | |
297 | unsigned int new_adc_bit; | |
298 | ||
299 | if (strict_strtoul(buf, 10, &lval)) | |
300 | return -EINVAL; | |
301 | if (!(lval == 4 || lval == 8 || lval == 12 || lval == 16)) { | |
302 | dev_err(dev, "The resolution is not supported\n"); | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | mutex_lock(&chip->lock); | |
307 | status = isl29018_set_resolution(client, lval, &new_adc_bit); | |
308 | if (status < 0) { | |
309 | mutex_unlock(&chip->lock); | |
310 | dev_err(dev, "Error in setting resolution\n"); | |
311 | return status; | |
312 | } | |
313 | chip->adc_bit = new_adc_bit; | |
314 | mutex_unlock(&chip->lock); | |
315 | ||
316 | return count; | |
317 | } | |
318 | ||
319 | /* proximity scheme */ | |
320 | static ssize_t show_prox_infrared_supression(struct device *dev, | |
321 | struct device_attribute *attr, char *buf) | |
322 | { | |
323 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
927afbec | 324 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 RK |
325 | |
326 | /* return the "proximity scheme" i.e. if the chip does on chip | |
327 | infrared supression (1 means perform on chip supression) */ | |
328 | return sprintf(buf, "%d\n", chip->prox_scheme); | |
329 | } | |
330 | ||
331 | static ssize_t store_prox_infrared_supression(struct device *dev, | |
332 | struct device_attribute *attr, const char *buf, size_t count) | |
333 | { | |
334 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
927afbec | 335 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 RK |
336 | unsigned long lval; |
337 | ||
338 | if (strict_strtoul(buf, 10, &lval)) | |
339 | return -EINVAL; | |
340 | if (!(lval == 0UL || lval == 1UL)) { | |
341 | dev_err(dev, "The mode is not supported\n"); | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | /* get the "proximity scheme" i.e. if the chip does on chip | |
346 | infrared supression (1 means perform on chip supression) */ | |
347 | mutex_lock(&chip->lock); | |
348 | chip->prox_scheme = (int)lval; | |
349 | mutex_unlock(&chip->lock); | |
350 | ||
351 | return count; | |
352 | } | |
353 | ||
01e57c57 BF |
354 | /* Channel IO */ |
355 | static int isl29018_write_raw(struct iio_dev *indio_dev, | |
356 | struct iio_chan_spec const *chan, | |
357 | int val, | |
358 | int val2, | |
359 | long mask) | |
94042874 | 360 | { |
01e57c57 BF |
361 | struct isl29018_chip *chip = iio_priv(indio_dev); |
362 | int ret = -EINVAL; | |
94042874 | 363 | |
01e57c57 | 364 | mutex_lock(&chip->lock); |
924f8a21 | 365 | if (mask == IIO_CHAN_INFO_CALIBSCALE_SEPARATE && |
01e57c57 BF |
366 | chan->type == IIO_LIGHT) { |
367 | chip->lux_scale = val; | |
368 | ret = 0; | |
369 | } | |
370 | mutex_unlock(&chip->lock); | |
371 | ||
372 | return 0; | |
94042874 RK |
373 | } |
374 | ||
01e57c57 BF |
375 | static int isl29018_read_raw(struct iio_dev *indio_dev, |
376 | struct iio_chan_spec const *chan, | |
377 | int *val, | |
378 | int *val2, | |
379 | long mask) | |
94042874 | 380 | { |
01e57c57 BF |
381 | int ret = -EINVAL; |
382 | struct isl29018_chip *chip = iio_priv(indio_dev); | |
383 | struct i2c_client *client = chip->client; | |
384 | ||
385 | mutex_lock(&chip->lock); | |
386 | switch (mask) { | |
387 | case 0: | |
388 | switch (chan->type) { | |
389 | case IIO_LIGHT: | |
390 | ret = isl29018_read_lux(client, val); | |
391 | break; | |
392 | case IIO_INTENSITY: | |
393 | ret = isl29018_read_ir(client, val); | |
394 | break; | |
395 | case IIO_PROXIMITY: | |
396 | ret = isl29018_read_proximity_ir(client, | |
397 | chip->prox_scheme, val); | |
398 | break; | |
399 | default: | |
400 | break; | |
401 | } | |
402 | if (!ret) | |
403 | ret = IIO_VAL_INT; | |
404 | break; | |
924f8a21 | 405 | case IIO_CHAN_INFO_CALIBSCALE_SEPARATE: |
01e57c57 BF |
406 | if (chan->type == IIO_LIGHT) { |
407 | *val = chip->lux_scale; | |
408 | ret = IIO_VAL_INT; | |
409 | } | |
410 | break; | |
411 | default: | |
412 | break; | |
413 | } | |
414 | mutex_unlock(&chip->lock); | |
415 | return ret; | |
94042874 RK |
416 | } |
417 | ||
01e57c57 BF |
418 | static const struct iio_chan_spec isl29018_channels[] = { |
419 | { | |
420 | .type = IIO_LIGHT, | |
421 | .indexed = 1, | |
422 | .channel = 0, | |
4a705130 | 423 | .processed_val = IIO_PROCESSED, |
01e57c57 BF |
424 | .info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE), |
425 | }, { | |
426 | .type = IIO_INTENSITY, | |
427 | .modified = 1, | |
428 | .channel2 = IIO_MOD_LIGHT_IR, | |
429 | }, { | |
430 | /* Unindexed in current ABI. But perhaps it should be. */ | |
431 | .type = IIO_PROXIMITY, | |
432 | } | |
433 | }; | |
434 | ||
94042874 RK |
435 | static IIO_DEVICE_ATTR(range, S_IRUGO | S_IWUSR, show_range, store_range, 0); |
436 | static IIO_CONST_ATTR(range_available, "1000 4000 16000 64000"); | |
437 | static IIO_CONST_ATTR(adc_resolution_available, "4 8 12 16"); | |
438 | static IIO_DEVICE_ATTR(adc_resolution, S_IRUGO | S_IWUSR, | |
439 | show_resolution, store_resolution, 0); | |
440 | static IIO_DEVICE_ATTR(proximity_on_chip_ambient_infrared_supression, | |
441 | S_IRUGO | S_IWUSR, | |
442 | show_prox_infrared_supression, | |
443 | store_prox_infrared_supression, 0); | |
94042874 RK |
444 | |
445 | #define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr) | |
446 | #define ISL29018_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr) | |
447 | static struct attribute *isl29018_attributes[] = { | |
94042874 RK |
448 | ISL29018_DEV_ATTR(range), |
449 | ISL29018_CONST_ATTR(range_available), | |
450 | ISL29018_DEV_ATTR(adc_resolution), | |
451 | ISL29018_CONST_ATTR(adc_resolution_available), | |
452 | ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_supression), | |
94042874 RK |
453 | NULL |
454 | }; | |
455 | ||
456 | static const struct attribute_group isl29108_group = { | |
457 | .attrs = isl29018_attributes, | |
458 | }; | |
459 | ||
460 | static int isl29018_chip_init(struct i2c_client *client) | |
461 | { | |
152d52cf | 462 | struct isl29018_chip *chip = iio_priv(i2c_get_clientdata(client)); |
94042874 RK |
463 | int status; |
464 | int new_adc_bit; | |
465 | unsigned int new_range; | |
466 | ||
467 | memset(chip->reg_cache, 0, sizeof(chip->reg_cache)); | |
468 | ||
176f9f29 GG |
469 | /* Code added per Intersil Application Note 1534: |
470 | * When VDD sinks to approximately 1.8V or below, some of | |
471 | * the part's registers may change their state. When VDD | |
472 | * recovers to 2.25V (or greater), the part may thus be in an | |
473 | * unknown mode of operation. The user can return the part to | |
474 | * a known mode of operation either by (a) setting VDD = 0V for | |
475 | * 1 second or more and then powering back up with a slew rate | |
476 | * of 0.5V/ms or greater, or (b) via I2C disable all ALS/PROX | |
477 | * conversions, clear the test registers, and then rewrite all | |
478 | * registers to the desired values. | |
479 | * ... | |
480 | * FOR ISL29011, ISL29018, ISL29021, ISL29023 | |
481 | * 1. Write 0x00 to register 0x08 (TEST) | |
482 | * 2. Write 0x00 to register 0x00 (CMD1) | |
483 | * 3. Rewrite all registers to the desired values | |
484 | * | |
485 | * ISL29018 Data Sheet (FN6619.1, Feb 11, 2010) essentially says | |
486 | * the same thing EXCEPT the data sheet asks for a 1ms delay after | |
487 | * writing the CMD1 register. | |
488 | */ | |
489 | status = isl29018_write_data(client, ISL29018_REG_TEST, 0, | |
490 | ISL29018_TEST_MASK, ISL29018_TEST_SHIFT); | |
491 | if (status < 0) { | |
492 | dev_err(&client->dev, "Failed to clear isl29018 TEST reg." | |
493 | "(%d)\n", status); | |
494 | return status; | |
495 | } | |
496 | ||
497 | /* See Intersil AN1534 comments above. | |
498 | * "Operating Mode" (COMMAND1) register is reprogrammed when | |
499 | * data is read from the device. | |
500 | */ | |
501 | status = isl29018_write_data(client, ISL29018_REG_ADD_COMMAND1, 0, | |
502 | 0xff, 0); | |
503 | if (status < 0) { | |
504 | dev_err(&client->dev, "Failed to clear isl29018 CMD1 reg." | |
505 | "(%d)\n", status); | |
506 | return status; | |
507 | } | |
508 | ||
509 | msleep(1); /* per data sheet, page 10 */ | |
510 | ||
94042874 RK |
511 | /* set defaults */ |
512 | status = isl29018_set_range(client, chip->range, &new_range); | |
513 | if (status < 0) { | |
514 | dev_err(&client->dev, "Init of isl29018 fails\n"); | |
515 | return status; | |
516 | } | |
517 | ||
518 | status = isl29018_set_resolution(client, chip->adc_bit, | |
519 | &new_adc_bit); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
6fe8135f JC |
524 | static const struct iio_info isl29108_info = { |
525 | .attrs = &isl29108_group, | |
526 | .driver_module = THIS_MODULE, | |
01e57c57 BF |
527 | .read_raw = &isl29018_read_raw, |
528 | .write_raw = &isl29018_write_raw, | |
6fe8135f JC |
529 | }; |
530 | ||
94042874 RK |
531 | static int __devinit isl29018_probe(struct i2c_client *client, |
532 | const struct i2c_device_id *id) | |
533 | { | |
534 | struct isl29018_chip *chip; | |
927afbec | 535 | struct iio_dev *indio_dev; |
94042874 RK |
536 | int err; |
537 | ||
927afbec JC |
538 | indio_dev = iio_allocate_device(sizeof(*chip)); |
539 | if (indio_dev == NULL) { | |
540 | dev_err(&client->dev, "iio allocation fails\n"); | |
94042874 RK |
541 | err = -ENOMEM; |
542 | goto exit; | |
543 | } | |
927afbec | 544 | chip = iio_priv(indio_dev); |
94042874 | 545 | |
927afbec | 546 | i2c_set_clientdata(client, indio_dev); |
94042874 RK |
547 | chip->client = client; |
548 | ||
549 | mutex_init(&chip->lock); | |
550 | ||
6d1ad0f8 | 551 | chip->lux_scale = 1; |
94042874 RK |
552 | chip->range = 1000; |
553 | chip->adc_bit = 16; | |
554 | ||
555 | err = isl29018_chip_init(client); | |
556 | if (err) | |
927afbec | 557 | goto exit_iio_free; |
94042874 | 558 | |
927afbec | 559 | indio_dev->info = &isl29108_info; |
01e57c57 BF |
560 | indio_dev->channels = isl29018_channels; |
561 | indio_dev->num_channels = ARRAY_SIZE(isl29018_channels); | |
927afbec JC |
562 | indio_dev->name = id->name; |
563 | indio_dev->dev.parent = &client->dev; | |
564 | indio_dev->modes = INDIO_DIRECT_MODE; | |
565 | err = iio_device_register(indio_dev); | |
94042874 RK |
566 | if (err) { |
567 | dev_err(&client->dev, "iio registration fails\n"); | |
568 | goto exit_iio_free; | |
569 | } | |
570 | ||
571 | return 0; | |
572 | exit_iio_free: | |
927afbec | 573 | iio_free_device(indio_dev); |
94042874 RK |
574 | exit: |
575 | return err; | |
576 | } | |
577 | ||
578 | static int __devexit isl29018_remove(struct i2c_client *client) | |
579 | { | |
927afbec | 580 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
94042874 RK |
581 | |
582 | dev_dbg(&client->dev, "%s()\n", __func__); | |
927afbec | 583 | iio_device_unregister(indio_dev); |
d2fffd6c | 584 | iio_free_device(indio_dev); |
94042874 RK |
585 | |
586 | return 0; | |
587 | } | |
588 | ||
589 | static const struct i2c_device_id isl29018_id[] = { | |
590 | {"isl29018", 0}, | |
591 | {} | |
592 | }; | |
593 | ||
594 | MODULE_DEVICE_TABLE(i2c, isl29018_id); | |
595 | ||
596 | static struct i2c_driver isl29018_driver = { | |
597 | .class = I2C_CLASS_HWMON, | |
598 | .driver = { | |
599 | .name = "isl29018", | |
600 | .owner = THIS_MODULE, | |
601 | }, | |
602 | .probe = isl29018_probe, | |
603 | .remove = __devexit_p(isl29018_remove), | |
604 | .id_table = isl29018_id, | |
605 | }; | |
606 | ||
607 | static int __init isl29018_init(void) | |
608 | { | |
609 | return i2c_add_driver(&isl29018_driver); | |
610 | } | |
611 | ||
612 | static void __exit isl29018_exit(void) | |
613 | { | |
614 | i2c_del_driver(&isl29018_driver); | |
615 | } | |
616 | ||
617 | module_init(isl29018_init); | |
618 | module_exit(isl29018_exit); | |
619 | ||
620 | MODULE_DESCRIPTION("ISL29018 Ambient Light Sensor driver"); | |
621 | MODULE_LICENSE("GPL"); |