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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
94042874 | 2 | /* |
609acefa | 3 | * A iio driver for the light sensor ISL 29018/29023/29035. |
94042874 RK |
4 | * |
5 | * IIO driver for monitoring ambient light intensity in luxi, proximity | |
6 | * sensing and infrared sensing. | |
7 | * | |
8 | * Copyright (c) 2010, NVIDIA Corporation. | |
94042874 RK |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/i2c.h> | |
13 | #include <linux/err.h> | |
14 | #include <linux/mutex.h> | |
15 | #include <linux/delay.h> | |
057340e3 | 16 | #include <linux/regmap.h> |
1a02d123 | 17 | #include <linux/regulator/consumer.h> |
94042874 | 18 | #include <linux/slab.h> |
06458e27 JC |
19 | #include <linux/iio/iio.h> |
20 | #include <linux/iio/sysfs.h> | |
dc4ecaf2 | 21 | #include <linux/acpi.h> |
057340e3 | 22 | |
13e6d634 | 23 | #define ISL29018_CONV_TIME_MS 100 |
94042874 RK |
24 | |
25 | #define ISL29018_REG_ADD_COMMAND1 0x00 | |
13e6d634 PMS |
26 | #define ISL29018_CMD1_OPMODE_SHIFT 5 |
27 | #define ISL29018_CMD1_OPMODE_MASK (7 << ISL29018_CMD1_OPMODE_SHIFT) | |
28 | #define ISL29018_CMD1_OPMODE_POWER_DOWN 0 | |
29 | #define ISL29018_CMD1_OPMODE_ALS_ONCE 1 | |
30 | #define ISL29018_CMD1_OPMODE_IR_ONCE 2 | |
31 | #define ISL29018_CMD1_OPMODE_PROX_ONCE 3 | |
94042874 | 32 | |
13e6d634 PMS |
33 | #define ISL29018_REG_ADD_COMMAND2 0x01 |
34 | #define ISL29018_CMD2_RESOLUTION_SHIFT 2 | |
35 | #define ISL29018_CMD2_RESOLUTION_MASK (0x3 << ISL29018_CMD2_RESOLUTION_SHIFT) | |
94042874 | 36 | |
13e6d634 PMS |
37 | #define ISL29018_CMD2_RANGE_SHIFT 0 |
38 | #define ISL29018_CMD2_RANGE_MASK (0x3 << ISL29018_CMD2_RANGE_SHIFT) | |
94042874 | 39 | |
13e6d634 PMS |
40 | #define ISL29018_CMD2_SCHEME_SHIFT 7 |
41 | #define ISL29018_CMD2_SCHEME_MASK (0x1 << ISL29018_CMD2_SCHEME_SHIFT) | |
94042874 RK |
42 | |
43 | #define ISL29018_REG_ADD_DATA_LSB 0x02 | |
44 | #define ISL29018_REG_ADD_DATA_MSB 0x03 | |
94042874 | 45 | |
176f9f29 GG |
46 | #define ISL29018_REG_TEST 0x08 |
47 | #define ISL29018_TEST_SHIFT 0 | |
48 | #define ISL29018_TEST_MASK (0xFF << ISL29018_TEST_SHIFT) | |
49 | ||
609acefa LP |
50 | #define ISL29035_REG_DEVICE_ID 0x0F |
51 | #define ISL29035_DEVICE_ID_SHIFT 0x03 | |
52 | #define ISL29035_DEVICE_ID_MASK (0x7 << ISL29035_DEVICE_ID_SHIFT) | |
53 | #define ISL29035_DEVICE_ID 0x5 | |
54 | #define ISL29035_BOUT_SHIFT 0x07 | |
55 | #define ISL29035_BOUT_MASK (0x01 << ISL29035_BOUT_SHIFT) | |
56 | ||
6920ccf6 RD |
57 | enum isl29018_int_time { |
58 | ISL29018_INT_TIME_16, | |
59 | ISL29018_INT_TIME_12, | |
60 | ISL29018_INT_TIME_8, | |
61 | ISL29018_INT_TIME_4, | |
62 | }; | |
63 | ||
64 | static const unsigned int isl29018_int_utimes[3][4] = { | |
65 | {90000, 5630, 351, 21}, | |
66 | {90000, 5600, 352, 22}, | |
67 | {105000, 6500, 410, 25}, | |
68 | }; | |
69 | ||
70 | static const struct isl29018_scale { | |
71 | unsigned int scale; | |
72 | unsigned int uscale; | |
73 | } isl29018_scales[4][4] = { | |
74 | { {0, 15258}, {0, 61035}, {0, 244140}, {0, 976562} }, | |
75 | { {0, 244140}, {0, 976562}, {3, 906250}, {15, 625000} }, | |
76 | { {3, 906250}, {15, 625000}, {62, 500000}, {250, 0} }, | |
77 | { {62, 500000}, {250, 0}, {1000, 0}, {4000, 0} } | |
78 | }; | |
79 | ||
94042874 | 80 | struct isl29018_chip { |
057340e3 | 81 | struct regmap *regmap; |
94042874 | 82 | struct mutex lock; |
609acefa | 83 | int type; |
809a591b RD |
84 | unsigned int calibscale; |
85 | unsigned int ucalibscale; | |
6920ccf6 RD |
86 | unsigned int int_time; |
87 | struct isl29018_scale scale; | |
94042874 | 88 | int prox_scheme; |
1e45cf3c | 89 | bool suspended; |
1a02d123 | 90 | struct regulator *vcc_reg; |
94042874 RK |
91 | }; |
92 | ||
6920ccf6 RD |
93 | static int isl29018_set_integration_time(struct isl29018_chip *chip, |
94 | unsigned int utime) | |
94042874 | 95 | { |
ea908ab6 BM |
96 | unsigned int i; |
97 | int ret; | |
6920ccf6 | 98 | unsigned int int_time, new_int_time; |
6920ccf6 RD |
99 | |
100 | for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i) { | |
101 | if (utime == isl29018_int_utimes[chip->type][i]) { | |
102 | new_int_time = i; | |
94042874 RK |
103 | break; |
104 | } | |
105 | } | |
106 | ||
6920ccf6 | 107 | if (i >= ARRAY_SIZE(isl29018_int_utimes[chip->type])) |
94042874 RK |
108 | return -EINVAL; |
109 | ||
13e6d634 PMS |
110 | ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2, |
111 | ISL29018_CMD2_RESOLUTION_MASK, | |
112 | i << ISL29018_CMD2_RESOLUTION_SHIFT); | |
6920ccf6 RD |
113 | if (ret < 0) |
114 | return ret; | |
115 | ||
96273f43 | 116 | /* Keep the same range when integration time changes */ |
6920ccf6 RD |
117 | int_time = chip->int_time; |
118 | for (i = 0; i < ARRAY_SIZE(isl29018_scales[int_time]); ++i) { | |
119 | if (chip->scale.scale == isl29018_scales[int_time][i].scale && | |
120 | chip->scale.uscale == isl29018_scales[int_time][i].uscale) { | |
121 | chip->scale = isl29018_scales[new_int_time][i]; | |
122 | break; | |
123 | } | |
124 | } | |
125 | chip->int_time = new_int_time; | |
126 | ||
127 | return 0; | |
94042874 RK |
128 | } |
129 | ||
6920ccf6 | 130 | static int isl29018_set_scale(struct isl29018_chip *chip, int scale, int uscale) |
94042874 | 131 | { |
ea908ab6 BM |
132 | unsigned int i; |
133 | int ret; | |
6920ccf6 | 134 | struct isl29018_scale new_scale; |
94042874 | 135 | |
6920ccf6 RD |
136 | for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i) { |
137 | if (scale == isl29018_scales[chip->int_time][i].scale && | |
138 | uscale == isl29018_scales[chip->int_time][i].uscale) { | |
139 | new_scale = isl29018_scales[chip->int_time][i]; | |
94042874 RK |
140 | break; |
141 | } | |
142 | } | |
143 | ||
6920ccf6 | 144 | if (i >= ARRAY_SIZE(isl29018_scales[chip->int_time])) |
94042874 RK |
145 | return -EINVAL; |
146 | ||
13e6d634 PMS |
147 | ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2, |
148 | ISL29018_CMD2_RANGE_MASK, | |
149 | i << ISL29018_CMD2_RANGE_SHIFT); | |
6920ccf6 RD |
150 | if (ret < 0) |
151 | return ret; | |
152 | ||
153 | chip->scale = new_scale; | |
154 | ||
155 | return 0; | |
94042874 RK |
156 | } |
157 | ||
057340e3 | 158 | static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode) |
94042874 RK |
159 | { |
160 | int status; | |
057340e3 LD |
161 | unsigned int lsb; |
162 | unsigned int msb; | |
64670869 | 163 | struct device *dev = regmap_get_device(chip->regmap); |
94042874 RK |
164 | |
165 | /* Set mode */ | |
057340e3 | 166 | status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, |
13e6d634 | 167 | mode << ISL29018_CMD1_OPMODE_SHIFT); |
94042874 | 168 | if (status) { |
64670869 | 169 | dev_err(dev, |
057340e3 | 170 | "Error in setting operating mode err %d\n", status); |
94042874 RK |
171 | return status; |
172 | } | |
13e6d634 | 173 | msleep(ISL29018_CONV_TIME_MS); |
057340e3 LD |
174 | status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_LSB, &lsb); |
175 | if (status < 0) { | |
64670869 | 176 | dev_err(dev, |
057340e3 LD |
177 | "Error in reading LSB DATA with err %d\n", status); |
178 | return status; | |
94042874 RK |
179 | } |
180 | ||
057340e3 LD |
181 | status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_MSB, &msb); |
182 | if (status < 0) { | |
64670869 | 183 | dev_err(dev, |
057340e3 LD |
184 | "Error in reading MSB DATA with error %d\n", status); |
185 | return status; | |
94042874 | 186 | } |
64670869 | 187 | dev_vdbg(dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb); |
94042874 RK |
188 | |
189 | return (msb << 8) | lsb; | |
190 | } | |
191 | ||
057340e3 | 192 | static int isl29018_read_lux(struct isl29018_chip *chip, int *lux) |
94042874 RK |
193 | { |
194 | int lux_data; | |
6920ccf6 | 195 | unsigned int data_x_range; |
94042874 | 196 | |
13e6d634 PMS |
197 | lux_data = isl29018_read_sensor_input(chip, |
198 | ISL29018_CMD1_OPMODE_ALS_ONCE); | |
94042874 RK |
199 | if (lux_data < 0) |
200 | return lux_data; | |
201 | ||
6920ccf6 RD |
202 | data_x_range = lux_data * chip->scale.scale + |
203 | lux_data * chip->scale.uscale / 1000000; | |
204 | *lux = data_x_range * chip->calibscale + | |
205 | data_x_range * chip->ucalibscale / 1000000; | |
94042874 RK |
206 | |
207 | return 0; | |
208 | } | |
209 | ||
057340e3 | 210 | static int isl29018_read_ir(struct isl29018_chip *chip, int *ir) |
94042874 RK |
211 | { |
212 | int ir_data; | |
213 | ||
13e6d634 PMS |
214 | ir_data = isl29018_read_sensor_input(chip, |
215 | ISL29018_CMD1_OPMODE_IR_ONCE); | |
94042874 RK |
216 | if (ir_data < 0) |
217 | return ir_data; | |
218 | ||
219 | *ir = ir_data; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
057340e3 | 224 | static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme, |
ca52c88c | 225 | int *near_ir) |
94042874 RK |
226 | { |
227 | int status; | |
228 | int prox_data = -1; | |
229 | int ir_data = -1; | |
64670869 | 230 | struct device *dev = regmap_get_device(chip->regmap); |
94042874 RK |
231 | |
232 | /* Do proximity sensing with required scheme */ | |
13e6d634 PMS |
233 | status = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2, |
234 | ISL29018_CMD2_SCHEME_MASK, | |
235 | scheme << ISL29018_CMD2_SCHEME_SHIFT); | |
94042874 | 236 | if (status) { |
64670869 | 237 | dev_err(dev, "Error in setting operating mode\n"); |
94042874 RK |
238 | return status; |
239 | } | |
240 | ||
057340e3 | 241 | prox_data = isl29018_read_sensor_input(chip, |
13e6d634 | 242 | ISL29018_CMD1_OPMODE_PROX_ONCE); |
94042874 RK |
243 | if (prox_data < 0) |
244 | return prox_data; | |
245 | ||
246 | if (scheme == 1) { | |
247 | *near_ir = prox_data; | |
248 | return 0; | |
249 | } | |
250 | ||
13e6d634 PMS |
251 | ir_data = isl29018_read_sensor_input(chip, |
252 | ISL29018_CMD1_OPMODE_IR_ONCE); | |
94042874 RK |
253 | if (ir_data < 0) |
254 | return ir_data; | |
255 | ||
256 | if (prox_data >= ir_data) | |
257 | *near_ir = prox_data - ir_data; | |
258 | else | |
259 | *near_ir = 0; | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
02819966 BM |
264 | static ssize_t in_illuminance_scale_available_show |
265 | (struct device *dev, struct device_attribute *attr, | |
266 | char *buf) | |
6920ccf6 RD |
267 | { |
268 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
269 | struct isl29018_chip *chip = iio_priv(indio_dev); | |
ea908ab6 BM |
270 | unsigned int i; |
271 | int len = 0; | |
6920ccf6 | 272 | |
5faf98cb | 273 | mutex_lock(&chip->lock); |
6920ccf6 RD |
274 | for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i) |
275 | len += sprintf(buf + len, "%d.%06d ", | |
276 | isl29018_scales[chip->int_time][i].scale, | |
277 | isl29018_scales[chip->int_time][i].uscale); | |
5faf98cb | 278 | mutex_unlock(&chip->lock); |
6920ccf6 RD |
279 | |
280 | buf[len - 1] = '\n'; | |
281 | ||
282 | return len; | |
283 | } | |
284 | ||
02819966 BM |
285 | static ssize_t in_illuminance_integration_time_available_show |
286 | (struct device *dev, struct device_attribute *attr, | |
287 | char *buf) | |
6920ccf6 RD |
288 | { |
289 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
290 | struct isl29018_chip *chip = iio_priv(indio_dev); | |
ea908ab6 BM |
291 | unsigned int i; |
292 | int len = 0; | |
6920ccf6 RD |
293 | |
294 | for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i) | |
295 | len += sprintf(buf + len, "0.%06d ", | |
296 | isl29018_int_utimes[chip->type][i]); | |
297 | ||
298 | buf[len - 1] = '\n'; | |
299 | ||
300 | return len; | |
301 | } | |
302 | ||
e748e280 BM |
303 | /* |
304 | * From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the | |
305 | * infrared suppression: | |
306 | * | |
307 | * Proximity Sensing Scheme: Bit 7. This bit programs the function | |
308 | * of the proximity detection. Logic 0 of this bit, Scheme 0, makes | |
309 | * full n (4, 8, 12, 16) bits (unsigned) proximity detection. The range | |
310 | * of Scheme 0 proximity count is from 0 to 2^n. Logic 1 of this bit, | |
311 | * Scheme 1, makes n-1 (3, 7, 11, 15) bits (2's complementary) | |
312 | * proximity_less_ambient detection. The range of Scheme 1 | |
313 | * proximity count is from -2^(n-1) to 2^(n-1) . The sign bit is extended | |
314 | * for resolutions less than 16. While Scheme 0 has wider dynamic | |
315 | * range, Scheme 1 proximity detection is less affected by the | |
316 | * ambient IR noise variation. | |
317 | * | |
318 | * 0 Sensing IR from LED and ambient | |
319 | * 1 Sensing IR from LED with ambient IR rejection | |
320 | */ | |
02819966 BM |
321 | static ssize_t proximity_on_chip_ambient_infrared_suppression_show |
322 | (struct device *dev, struct device_attribute *attr, | |
323 | char *buf) | |
94042874 | 324 | { |
96f691f9 | 325 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
927afbec | 326 | struct isl29018_chip *chip = iio_priv(indio_dev); |
94042874 | 327 | |
7f3829a3 | 328 | /* |
96273f43 | 329 | * Return the "proximity scheme" i.e. if the chip does on chip |
7f3829a3 ERR |
330 | * infrared suppression (1 means perform on chip suppression) |
331 | */ | |
94042874 RK |
332 | return sprintf(buf, "%d\n", chip->prox_scheme); |
333 | } | |
334 | ||
02819966 BM |
335 | static ssize_t proximity_on_chip_ambient_infrared_suppression_store |
336 | (struct device *dev, struct device_attribute *attr, | |
337 | const char *buf, size_t count) | |
94042874 | 338 | { |
96f691f9 | 339 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
927afbec | 340 | struct isl29018_chip *chip = iio_priv(indio_dev); |
e5e26dd5 | 341 | int val; |
94042874 | 342 | |
e5e26dd5 | 343 | if (kstrtoint(buf, 10, &val)) |
94042874 | 344 | return -EINVAL; |
ab5b9492 | 345 | if (!(val == 0 || val == 1)) |
94042874 | 346 | return -EINVAL; |
94042874 | 347 | |
7f3829a3 | 348 | /* |
96273f43 | 349 | * Get the "proximity scheme" i.e. if the chip does on chip |
7f3829a3 ERR |
350 | * infrared suppression (1 means perform on chip suppression) |
351 | */ | |
94042874 | 352 | mutex_lock(&chip->lock); |
e5e26dd5 | 353 | chip->prox_scheme = val; |
94042874 RK |
354 | mutex_unlock(&chip->lock); |
355 | ||
356 | return count; | |
357 | } | |
358 | ||
01e57c57 BF |
359 | static int isl29018_write_raw(struct iio_dev *indio_dev, |
360 | struct iio_chan_spec const *chan, | |
361 | int val, | |
362 | int val2, | |
363 | long mask) | |
94042874 | 364 | { |
01e57c57 BF |
365 | struct isl29018_chip *chip = iio_priv(indio_dev); |
366 | int ret = -EINVAL; | |
94042874 | 367 | |
01e57c57 | 368 | mutex_lock(&chip->lock); |
00053566 BM |
369 | if (chip->suspended) { |
370 | ret = -EBUSY; | |
371 | goto write_done; | |
372 | } | |
6920ccf6 RD |
373 | switch (mask) { |
374 | case IIO_CHAN_INFO_CALIBSCALE: | |
375 | if (chan->type == IIO_LIGHT) { | |
376 | chip->calibscale = val; | |
377 | chip->ucalibscale = val2; | |
378 | ret = 0; | |
379 | } | |
380 | break; | |
381 | case IIO_CHAN_INFO_INT_TIME: | |
528021fc | 382 | if (chan->type == IIO_LIGHT && !val) |
6920ccf6 RD |
383 | ret = isl29018_set_integration_time(chip, val2); |
384 | break; | |
385 | case IIO_CHAN_INFO_SCALE: | |
386 | if (chan->type == IIO_LIGHT) | |
387 | ret = isl29018_set_scale(chip, val, val2); | |
388 | break; | |
389 | default: | |
390 | break; | |
01e57c57 | 391 | } |
01e57c57 | 392 | |
00053566 BM |
393 | write_done: |
394 | mutex_unlock(&chip->lock); | |
744ef62c | 395 | |
6dc973d4 | 396 | return ret; |
94042874 RK |
397 | } |
398 | ||
01e57c57 BF |
399 | static int isl29018_read_raw(struct iio_dev *indio_dev, |
400 | struct iio_chan_spec const *chan, | |
401 | int *val, | |
402 | int *val2, | |
403 | long mask) | |
94042874 | 404 | { |
01e57c57 BF |
405 | int ret = -EINVAL; |
406 | struct isl29018_chip *chip = iio_priv(indio_dev); | |
01e57c57 BF |
407 | |
408 | mutex_lock(&chip->lock); | |
1e45cf3c | 409 | if (chip->suspended) { |
5611cd6f BM |
410 | ret = -EBUSY; |
411 | goto read_done; | |
1e45cf3c | 412 | } |
01e57c57 | 413 | switch (mask) { |
90354d00 JC |
414 | case IIO_CHAN_INFO_RAW: |
415 | case IIO_CHAN_INFO_PROCESSED: | |
01e57c57 BF |
416 | switch (chan->type) { |
417 | case IIO_LIGHT: | |
057340e3 | 418 | ret = isl29018_read_lux(chip, val); |
01e57c57 BF |
419 | break; |
420 | case IIO_INTENSITY: | |
057340e3 | 421 | ret = isl29018_read_ir(chip, val); |
01e57c57 BF |
422 | break; |
423 | case IIO_PROXIMITY: | |
057340e3 | 424 | ret = isl29018_read_proximity_ir(chip, |
ca52c88c ERR |
425 | chip->prox_scheme, |
426 | val); | |
01e57c57 BF |
427 | break; |
428 | default: | |
429 | break; | |
430 | } | |
431 | if (!ret) | |
432 | ret = IIO_VAL_INT; | |
433 | break; | |
6920ccf6 RD |
434 | case IIO_CHAN_INFO_INT_TIME: |
435 | if (chan->type == IIO_LIGHT) { | |
436 | *val = 0; | |
437 | *val2 = isl29018_int_utimes[chip->type][chip->int_time]; | |
438 | ret = IIO_VAL_INT_PLUS_MICRO; | |
439 | } | |
440 | break; | |
441 | case IIO_CHAN_INFO_SCALE: | |
442 | if (chan->type == IIO_LIGHT) { | |
443 | *val = chip->scale.scale; | |
444 | *val2 = chip->scale.uscale; | |
445 | ret = IIO_VAL_INT_PLUS_MICRO; | |
446 | } | |
447 | break; | |
c8a9f805 | 448 | case IIO_CHAN_INFO_CALIBSCALE: |
01e57c57 | 449 | if (chan->type == IIO_LIGHT) { |
809a591b RD |
450 | *val = chip->calibscale; |
451 | *val2 = chip->ucalibscale; | |
932323b7 | 452 | ret = IIO_VAL_INT_PLUS_MICRO; |
01e57c57 BF |
453 | } |
454 | break; | |
455 | default: | |
456 | break; | |
457 | } | |
5611cd6f BM |
458 | |
459 | read_done: | |
01e57c57 | 460 | mutex_unlock(&chip->lock); |
744ef62c | 461 | |
01e57c57 | 462 | return ret; |
94042874 RK |
463 | } |
464 | ||
609acefa LP |
465 | #define ISL29018_LIGHT_CHANNEL { \ |
466 | .type = IIO_LIGHT, \ | |
467 | .indexed = 1, \ | |
468 | .channel = 0, \ | |
469 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | \ | |
6920ccf6 RD |
470 | BIT(IIO_CHAN_INFO_CALIBSCALE) | \ |
471 | BIT(IIO_CHAN_INFO_SCALE) | \ | |
472 | BIT(IIO_CHAN_INFO_INT_TIME), \ | |
609acefa LP |
473 | } |
474 | ||
475 | #define ISL29018_IR_CHANNEL { \ | |
476 | .type = IIO_INTENSITY, \ | |
477 | .modified = 1, \ | |
478 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
479 | .channel2 = IIO_MOD_LIGHT_IR, \ | |
480 | } | |
481 | ||
482 | #define ISL29018_PROXIMITY_CHANNEL { \ | |
483 | .type = IIO_PROXIMITY, \ | |
484 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
485 | } | |
486 | ||
01e57c57 | 487 | static const struct iio_chan_spec isl29018_channels[] = { |
609acefa LP |
488 | ISL29018_LIGHT_CHANNEL, |
489 | ISL29018_IR_CHANNEL, | |
490 | ISL29018_PROXIMITY_CHANNEL, | |
491 | }; | |
492 | ||
493 | static const struct iio_chan_spec isl29023_channels[] = { | |
494 | ISL29018_LIGHT_CHANNEL, | |
495 | ISL29018_IR_CHANNEL, | |
01e57c57 BF |
496 | }; |
497 | ||
02819966 BM |
498 | static IIO_DEVICE_ATTR_RO(in_illuminance_integration_time_available, 0); |
499 | static IIO_DEVICE_ATTR_RO(in_illuminance_scale_available, 0); | |
500 | static IIO_DEVICE_ATTR_RW(proximity_on_chip_ambient_infrared_suppression, 0); | |
94042874 RK |
501 | |
502 | #define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr) | |
6920ccf6 | 503 | |
94042874 | 504 | static struct attribute *isl29018_attributes[] = { |
6920ccf6 RD |
505 | ISL29018_DEV_ATTR(in_illuminance_scale_available), |
506 | ISL29018_DEV_ATTR(in_illuminance_integration_time_available), | |
2a1d45ec | 507 | ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_suppression), |
94042874 RK |
508 | NULL |
509 | }; | |
510 | ||
609acefa | 511 | static struct attribute *isl29023_attributes[] = { |
6920ccf6 RD |
512 | ISL29018_DEV_ATTR(in_illuminance_scale_available), |
513 | ISL29018_DEV_ATTR(in_illuminance_integration_time_available), | |
609acefa LP |
514 | NULL |
515 | }; | |
516 | ||
5b4b5b9c | 517 | static const struct attribute_group isl29018_group = { |
94042874 RK |
518 | .attrs = isl29018_attributes, |
519 | }; | |
520 | ||
609acefa LP |
521 | static const struct attribute_group isl29023_group = { |
522 | .attrs = isl29023_attributes, | |
523 | }; | |
524 | ||
609acefa LP |
525 | enum { |
526 | isl29018, | |
527 | isl29023, | |
528 | isl29035, | |
529 | }; | |
530 | ||
057340e3 | 531 | static int isl29018_chip_init(struct isl29018_chip *chip) |
94042874 | 532 | { |
94042874 | 533 | int status; |
64670869 | 534 | struct device *dev = regmap_get_device(chip->regmap); |
94042874 | 535 | |
609acefa | 536 | if (chip->type == isl29035) { |
8281101c BM |
537 | unsigned int id; |
538 | ||
539 | status = regmap_read(chip->regmap, ISL29035_REG_DEVICE_ID, &id); | |
540 | if (status < 0) { | |
541 | dev_err(dev, | |
542 | "Error reading ID register with error %d\n", | |
543 | status); | |
544 | return status; | |
545 | } | |
546 | ||
547 | id = (id & ISL29035_DEVICE_ID_MASK) >> ISL29035_DEVICE_ID_SHIFT; | |
548 | ||
549 | if (id != ISL29035_DEVICE_ID) | |
550 | return -ENODEV; | |
551 | ||
552 | /* Clear brownout bit */ | |
553 | status = regmap_update_bits(chip->regmap, | |
554 | ISL29035_REG_DEVICE_ID, | |
555 | ISL29035_BOUT_MASK, 0); | |
609acefa LP |
556 | if (status < 0) |
557 | return status; | |
558 | } | |
559 | ||
19a00a9d BM |
560 | /* |
561 | * Code added per Intersil Application Note 1534: | |
176f9f29 GG |
562 | * When VDD sinks to approximately 1.8V or below, some of |
563 | * the part's registers may change their state. When VDD | |
564 | * recovers to 2.25V (or greater), the part may thus be in an | |
565 | * unknown mode of operation. The user can return the part to | |
566 | * a known mode of operation either by (a) setting VDD = 0V for | |
567 | * 1 second or more and then powering back up with a slew rate | |
568 | * of 0.5V/ms or greater, or (b) via I2C disable all ALS/PROX | |
569 | * conversions, clear the test registers, and then rewrite all | |
570 | * registers to the desired values. | |
571 | * ... | |
96273f43 | 572 | * For ISL29011, ISL29018, ISL29021, ISL29023 |
176f9f29 GG |
573 | * 1. Write 0x00 to register 0x08 (TEST) |
574 | * 2. Write 0x00 to register 0x00 (CMD1) | |
575 | * 3. Rewrite all registers to the desired values | |
576 | * | |
577 | * ISL29018 Data Sheet (FN6619.1, Feb 11, 2010) essentially says | |
578 | * the same thing EXCEPT the data sheet asks for a 1ms delay after | |
579 | * writing the CMD1 register. | |
580 | */ | |
057340e3 | 581 | status = regmap_write(chip->regmap, ISL29018_REG_TEST, 0x0); |
176f9f29 | 582 | if (status < 0) { |
64670869 | 583 | dev_err(dev, "Failed to clear isl29018 TEST reg.(%d)\n", |
ad3e646c | 584 | status); |
176f9f29 GG |
585 | return status; |
586 | } | |
587 | ||
19a00a9d BM |
588 | /* |
589 | * See Intersil AN1534 comments above. | |
176f9f29 GG |
590 | * "Operating Mode" (COMMAND1) register is reprogrammed when |
591 | * data is read from the device. | |
592 | */ | |
057340e3 | 593 | status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, 0); |
176f9f29 | 594 | if (status < 0) { |
64670869 | 595 | dev_err(dev, "Failed to clear isl29018 CMD1 reg.(%d)\n", |
ad3e646c | 596 | status); |
176f9f29 GG |
597 | return status; |
598 | } | |
599 | ||
890d228f | 600 | usleep_range(1000, 2000); /* per data sheet, page 10 */ |
176f9f29 | 601 | |
96273f43 | 602 | /* Set defaults */ |
6920ccf6 RD |
603 | status = isl29018_set_scale(chip, chip->scale.scale, |
604 | chip->scale.uscale); | |
94042874 | 605 | if (status < 0) { |
64670869 | 606 | dev_err(dev, "Init of isl29018 fails\n"); |
94042874 RK |
607 | return status; |
608 | } | |
609 | ||
6920ccf6 RD |
610 | status = isl29018_set_integration_time(chip, |
611 | isl29018_int_utimes[chip->type][chip->int_time]); | |
aba1a8d7 | 612 | if (status < 0) |
64670869 | 613 | dev_err(dev, "Init of isl29018 fails\n"); |
94042874 | 614 | |
aba1a8d7 | 615 | return status; |
94042874 RK |
616 | } |
617 | ||
5b4b5b9c LP |
618 | static const struct iio_info isl29018_info = { |
619 | .attrs = &isl29018_group, | |
6d9b10c8 BG |
620 | .read_raw = isl29018_read_raw, |
621 | .write_raw = isl29018_write_raw, | |
6fe8135f JC |
622 | }; |
623 | ||
609acefa LP |
624 | static const struct iio_info isl29023_info = { |
625 | .attrs = &isl29023_group, | |
6d9b10c8 BG |
626 | .read_raw = isl29018_read_raw, |
627 | .write_raw = isl29018_write_raw, | |
609acefa LP |
628 | }; |
629 | ||
9219376d | 630 | static bool isl29018_is_volatile_reg(struct device *dev, unsigned int reg) |
057340e3 LD |
631 | { |
632 | switch (reg) { | |
633 | case ISL29018_REG_ADD_DATA_LSB: | |
634 | case ISL29018_REG_ADD_DATA_MSB: | |
635 | case ISL29018_REG_ADD_COMMAND1: | |
636 | case ISL29018_REG_TEST: | |
609acefa | 637 | case ISL29035_REG_DEVICE_ID: |
057340e3 LD |
638 | return true; |
639 | default: | |
640 | return false; | |
641 | } | |
642 | } | |
643 | ||
057340e3 LD |
644 | static const struct regmap_config isl29018_regmap_config = { |
645 | .reg_bits = 8, | |
646 | .val_bits = 8, | |
9219376d | 647 | .volatile_reg = isl29018_is_volatile_reg, |
057340e3 LD |
648 | .max_register = ISL29018_REG_TEST, |
649 | .num_reg_defaults_raw = ISL29018_REG_TEST + 1, | |
650 | .cache_type = REGCACHE_RBTREE, | |
651 | }; | |
652 | ||
609acefa LP |
653 | static const struct regmap_config isl29035_regmap_config = { |
654 | .reg_bits = 8, | |
655 | .val_bits = 8, | |
9219376d | 656 | .volatile_reg = isl29018_is_volatile_reg, |
609acefa LP |
657 | .max_register = ISL29035_REG_DEVICE_ID, |
658 | .num_reg_defaults_raw = ISL29035_REG_DEVICE_ID + 1, | |
659 | .cache_type = REGCACHE_RBTREE, | |
660 | }; | |
661 | ||
9219376d | 662 | struct isl29018_chip_info { |
609acefa LP |
663 | const struct iio_chan_spec *channels; |
664 | int num_channels; | |
665 | const struct iio_info *indio_info; | |
666 | const struct regmap_config *regmap_cfg; | |
667 | }; | |
668 | ||
9219376d | 669 | static const struct isl29018_chip_info isl29018_chip_info_tbl[] = { |
609acefa LP |
670 | [isl29018] = { |
671 | .channels = isl29018_channels, | |
672 | .num_channels = ARRAY_SIZE(isl29018_channels), | |
673 | .indio_info = &isl29018_info, | |
674 | .regmap_cfg = &isl29018_regmap_config, | |
675 | }, | |
676 | [isl29023] = { | |
677 | .channels = isl29023_channels, | |
678 | .num_channels = ARRAY_SIZE(isl29023_channels), | |
679 | .indio_info = &isl29023_info, | |
680 | .regmap_cfg = &isl29018_regmap_config, | |
681 | }, | |
682 | [isl29035] = { | |
683 | .channels = isl29023_channels, | |
684 | .num_channels = ARRAY_SIZE(isl29023_channels), | |
685 | .indio_info = &isl29023_info, | |
686 | .regmap_cfg = &isl29035_regmap_config, | |
687 | }, | |
688 | }; | |
689 | ||
dc4ecaf2 LP |
690 | static const char *isl29018_match_acpi_device(struct device *dev, int *data) |
691 | { | |
692 | const struct acpi_device_id *id; | |
693 | ||
694 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
695 | ||
696 | if (!id) | |
697 | return NULL; | |
698 | ||
79783b31 | 699 | *data = (int)id->driver_data; |
dc4ecaf2 LP |
700 | |
701 | return dev_name(dev); | |
702 | } | |
703 | ||
1a02d123 AH |
704 | static void isl29018_disable_regulator_action(void *_data) |
705 | { | |
706 | struct isl29018_chip *chip = _data; | |
707 | int err; | |
708 | ||
709 | err = regulator_disable(chip->vcc_reg); | |
710 | if (err) | |
711 | pr_err("failed to disable isl29018's VCC regulator!\n"); | |
712 | } | |
713 | ||
4ae1c61f | 714 | static int isl29018_probe(struct i2c_client *client, |
ca52c88c | 715 | const struct i2c_device_id *id) |
94042874 RK |
716 | { |
717 | struct isl29018_chip *chip; | |
927afbec | 718 | struct iio_dev *indio_dev; |
94042874 | 719 | int err; |
dc4ecaf2 LP |
720 | const char *name = NULL; |
721 | int dev_id = 0; | |
94042874 | 722 | |
e434dcf3 | 723 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); |
ab5b9492 | 724 | if (!indio_dev) |
e434dcf3 | 725 | return -ENOMEM; |
744ef62c | 726 | |
927afbec | 727 | chip = iio_priv(indio_dev); |
94042874 | 728 | |
927afbec | 729 | i2c_set_clientdata(client, indio_dev); |
94042874 | 730 | |
dc4ecaf2 LP |
731 | if (id) { |
732 | name = id->name; | |
733 | dev_id = id->driver_data; | |
734 | } | |
735 | ||
736 | if (ACPI_HANDLE(&client->dev)) | |
737 | name = isl29018_match_acpi_device(&client->dev, &dev_id); | |
738 | ||
94042874 RK |
739 | mutex_init(&chip->lock); |
740 | ||
dc4ecaf2 | 741 | chip->type = dev_id; |
809a591b RD |
742 | chip->calibscale = 1; |
743 | chip->ucalibscale = 0; | |
6920ccf6 RD |
744 | chip->int_time = ISL29018_INT_TIME_16; |
745 | chip->scale = isl29018_scales[chip->int_time][0]; | |
1e45cf3c | 746 | chip->suspended = false; |
94042874 | 747 | |
1a02d123 AH |
748 | chip->vcc_reg = devm_regulator_get(&client->dev, "vcc"); |
749 | if (IS_ERR(chip->vcc_reg)) { | |
750 | err = PTR_ERR(chip->vcc_reg); | |
751 | if (err != -EPROBE_DEFER) | |
752 | dev_err(&client->dev, "failed to get VCC regulator!\n"); | |
753 | return err; | |
754 | } | |
755 | ||
756 | err = regulator_enable(chip->vcc_reg); | |
757 | if (err) { | |
758 | dev_err(&client->dev, "failed to enable VCC regulator!\n"); | |
759 | return err; | |
760 | } | |
761 | ||
762 | err = devm_add_action_or_reset(&client->dev, isl29018_disable_regulator_action, | |
763 | chip); | |
764 | if (err) { | |
765 | dev_err(&client->dev, "failed to setup regulator cleanup action!\n"); | |
766 | return err; | |
767 | } | |
768 | ||
609acefa | 769 | chip->regmap = devm_regmap_init_i2c(client, |
9219376d | 770 | isl29018_chip_info_tbl[dev_id].regmap_cfg); |
057340e3 LD |
771 | if (IS_ERR(chip->regmap)) { |
772 | err = PTR_ERR(chip->regmap); | |
64670869 | 773 | dev_err(&client->dev, "regmap initialization fails: %d\n", err); |
e434dcf3 | 774 | return err; |
057340e3 LD |
775 | } |
776 | ||
777 | err = isl29018_chip_init(chip); | |
94042874 | 778 | if (err) |
e434dcf3 | 779 | return err; |
94042874 | 780 | |
9219376d PMS |
781 | indio_dev->info = isl29018_chip_info_tbl[dev_id].indio_info; |
782 | indio_dev->channels = isl29018_chip_info_tbl[dev_id].channels; | |
783 | indio_dev->num_channels = isl29018_chip_info_tbl[dev_id].num_channels; | |
dc4ecaf2 | 784 | indio_dev->name = name; |
927afbec JC |
785 | indio_dev->dev.parent = &client->dev; |
786 | indio_dev->modes = INDIO_DIRECT_MODE; | |
744ef62c | 787 | |
ab5b9492 | 788 | return devm_iio_device_register(&client->dev, indio_dev); |
94042874 RK |
789 | } |
790 | ||
1e45cf3c BF |
791 | #ifdef CONFIG_PM_SLEEP |
792 | static int isl29018_suspend(struct device *dev) | |
793 | { | |
794 | struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev)); | |
1a02d123 | 795 | int ret; |
1e45cf3c BF |
796 | |
797 | mutex_lock(&chip->lock); | |
798 | ||
19a00a9d BM |
799 | /* |
800 | * Since this driver uses only polling commands, we are by default in | |
1e45cf3c BF |
801 | * auto shutdown (ie, power-down) mode. |
802 | * So we do not have much to do here. | |
803 | */ | |
804 | chip->suspended = true; | |
1a02d123 AH |
805 | ret = regulator_disable(chip->vcc_reg); |
806 | if (ret) | |
807 | dev_err(dev, "failed to disable VCC regulator\n"); | |
1e45cf3c BF |
808 | |
809 | mutex_unlock(&chip->lock); | |
744ef62c | 810 | |
1a02d123 | 811 | return ret; |
1e45cf3c BF |
812 | } |
813 | ||
814 | static int isl29018_resume(struct device *dev) | |
815 | { | |
816 | struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev)); | |
817 | int err; | |
818 | ||
819 | mutex_lock(&chip->lock); | |
820 | ||
1a02d123 AH |
821 | err = regulator_enable(chip->vcc_reg); |
822 | if (err) { | |
823 | dev_err(dev, "failed to enable VCC regulator\n"); | |
824 | mutex_unlock(&chip->lock); | |
825 | return err; | |
826 | } | |
827 | ||
1e45cf3c BF |
828 | err = isl29018_chip_init(chip); |
829 | if (!err) | |
830 | chip->suspended = false; | |
831 | ||
832 | mutex_unlock(&chip->lock); | |
744ef62c | 833 | |
1e45cf3c BF |
834 | return err; |
835 | } | |
836 | ||
837 | static SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume); | |
838 | #define ISL29018_PM_OPS (&isl29018_pm_ops) | |
839 | #else | |
840 | #define ISL29018_PM_OPS NULL | |
841 | #endif | |
842 | ||
14b39dce | 843 | #ifdef CONFIG_ACPI |
dc4ecaf2 LP |
844 | static const struct acpi_device_id isl29018_acpi_match[] = { |
845 | {"ISL29018", isl29018}, | |
846 | {"ISL29023", isl29023}, | |
847 | {"ISL29035", isl29035}, | |
848 | {}, | |
849 | }; | |
850 | MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match); | |
14b39dce | 851 | #endif |
dc4ecaf2 | 852 | |
94042874 | 853 | static const struct i2c_device_id isl29018_id[] = { |
609acefa LP |
854 | {"isl29018", isl29018}, |
855 | {"isl29023", isl29023}, | |
856 | {"isl29035", isl29035}, | |
94042874 RK |
857 | {} |
858 | }; | |
94042874 RK |
859 | MODULE_DEVICE_TABLE(i2c, isl29018_id); |
860 | ||
4ee19524 | 861 | static const struct of_device_id isl29018_of_match[] = { |
610202dd | 862 | { .compatible = "isil,isl29018", }, |
609acefa LP |
863 | { .compatible = "isil,isl29023", }, |
864 | { .compatible = "isil,isl29035", }, | |
4ee19524 OJ |
865 | { }, |
866 | }; | |
867 | MODULE_DEVICE_TABLE(of, isl29018_of_match); | |
868 | ||
94042874 | 869 | static struct i2c_driver isl29018_driver = { |
94042874 RK |
870 | .driver = { |
871 | .name = "isl29018", | |
dc4ecaf2 | 872 | .acpi_match_table = ACPI_PTR(isl29018_acpi_match), |
1e45cf3c | 873 | .pm = ISL29018_PM_OPS, |
4ee19524 | 874 | .of_match_table = isl29018_of_match, |
94042874 RK |
875 | }, |
876 | .probe = isl29018_probe, | |
94042874 RK |
877 | .id_table = isl29018_id, |
878 | }; | |
6e5af184 | 879 | module_i2c_driver(isl29018_driver); |
94042874 RK |
880 | |
881 | MODULE_DESCRIPTION("ISL29018 Ambient Light Sensor driver"); | |
882 | MODULE_LICENSE("GPL"); |