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Commit | Line | Data |
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efa86e9f DB |
1 | /* |
2 | * RPR-0521 ROHM Ambient Light and Proximity Sensor | |
3 | * | |
4 | * Copyright (c) 2015, Intel Corporation. | |
5 | * | |
6 | * This file is subject to the terms and conditions of version 2 of | |
7 | * the GNU General Public License. See the file COPYING in the main | |
8 | * directory of this archive for more details. | |
9 | * | |
10 | * IIO driver for RPR-0521RS (7-bit I2C slave address 0x38). | |
11 | * | |
484c314b | 12 | * TODO: illuminance channel, buffer |
efa86e9f DB |
13 | */ |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/i2c.h> | |
18 | #include <linux/regmap.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/acpi.h> | |
21 | ||
22 | #include <linux/iio/iio.h> | |
23 | #include <linux/iio/sysfs.h> | |
24 | #include <linux/pm_runtime.h> | |
25 | ||
26 | #define RPR0521_REG_SYSTEM_CTRL 0x40 | |
27 | #define RPR0521_REG_MODE_CTRL 0x41 | |
28 | #define RPR0521_REG_ALS_CTRL 0x42 | |
29 | #define RPR0521_REG_PXS_CTRL 0x43 | |
30 | #define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */ | |
31 | #define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */ | |
32 | #define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */ | |
734c4423 | 33 | #define RPR0521_REG_PS_OFFSET_LSB 0x53 |
efa86e9f DB |
34 | #define RPR0521_REG_ID 0x92 |
35 | ||
36 | #define RPR0521_MODE_ALS_MASK BIT(7) | |
37 | #define RPR0521_MODE_PXS_MASK BIT(6) | |
38 | #define RPR0521_MODE_MEAS_TIME_MASK GENMASK(3, 0) | |
39 | #define RPR0521_ALS_DATA0_GAIN_MASK GENMASK(5, 4) | |
40 | #define RPR0521_ALS_DATA0_GAIN_SHIFT 4 | |
41 | #define RPR0521_ALS_DATA1_GAIN_MASK GENMASK(3, 2) | |
42 | #define RPR0521_ALS_DATA1_GAIN_SHIFT 2 | |
43 | #define RPR0521_PXS_GAIN_MASK GENMASK(5, 4) | |
44 | #define RPR0521_PXS_GAIN_SHIFT 4 | |
45 | ||
46 | #define RPR0521_MODE_ALS_ENABLE BIT(7) | |
47 | #define RPR0521_MODE_ALS_DISABLE 0x00 | |
48 | #define RPR0521_MODE_PXS_ENABLE BIT(6) | |
49 | #define RPR0521_MODE_PXS_DISABLE 0x00 | |
50 | ||
51 | #define RPR0521_MANUFACT_ID 0xE0 | |
52 | #define RPR0521_DEFAULT_MEAS_TIME 0x06 /* ALS - 100ms, PXS - 100ms */ | |
53 | ||
54 | #define RPR0521_DRV_NAME "RPR0521" | |
55 | #define RPR0521_REGMAP_NAME "rpr0521_regmap" | |
56 | ||
57 | #define RPR0521_SLEEP_DELAY_MS 2000 | |
58 | ||
59 | #define RPR0521_ALS_SCALE_AVAIL "0.007812 0.015625 0.5 1" | |
60 | #define RPR0521_PXS_SCALE_AVAIL "0.125 0.5 1" | |
61 | ||
62 | struct rpr0521_gain { | |
63 | int scale; | |
64 | int uscale; | |
65 | }; | |
66 | ||
67 | static const struct rpr0521_gain rpr0521_als_gain[4] = { | |
68 | {1, 0}, /* x1 */ | |
69 | {0, 500000}, /* x2 */ | |
70 | {0, 15625}, /* x64 */ | |
71 | {0, 7812}, /* x128 */ | |
72 | }; | |
73 | ||
74 | static const struct rpr0521_gain rpr0521_pxs_gain[3] = { | |
75 | {1, 0}, /* x1 */ | |
76 | {0, 500000}, /* x2 */ | |
77 | {0, 125000}, /* x4 */ | |
78 | }; | |
79 | ||
80 | enum rpr0521_channel { | |
9ece370b | 81 | RPR0521_CHAN_PXS, |
efa86e9f DB |
82 | RPR0521_CHAN_ALS_DATA0, |
83 | RPR0521_CHAN_ALS_DATA1, | |
efa86e9f DB |
84 | }; |
85 | ||
86 | struct rpr0521_reg_desc { | |
87 | u8 address; | |
88 | u8 device_mask; | |
89 | }; | |
90 | ||
91 | static const struct rpr0521_reg_desc rpr0521_data_reg[] = { | |
9ece370b MK |
92 | [RPR0521_CHAN_PXS] = { |
93 | .address = RPR0521_REG_PXS_DATA, | |
94 | .device_mask = RPR0521_MODE_PXS_MASK, | |
95 | }, | |
efa86e9f DB |
96 | [RPR0521_CHAN_ALS_DATA0] = { |
97 | .address = RPR0521_REG_ALS_DATA0, | |
98 | .device_mask = RPR0521_MODE_ALS_MASK, | |
99 | }, | |
100 | [RPR0521_CHAN_ALS_DATA1] = { | |
101 | .address = RPR0521_REG_ALS_DATA1, | |
102 | .device_mask = RPR0521_MODE_ALS_MASK, | |
103 | }, | |
efa86e9f DB |
104 | }; |
105 | ||
106 | static const struct rpr0521_gain_info { | |
107 | u8 reg; | |
108 | u8 mask; | |
109 | u8 shift; | |
110 | const struct rpr0521_gain *gain; | |
111 | int size; | |
112 | } rpr0521_gain[] = { | |
9ece370b MK |
113 | [RPR0521_CHAN_PXS] = { |
114 | .reg = RPR0521_REG_PXS_CTRL, | |
115 | .mask = RPR0521_PXS_GAIN_MASK, | |
116 | .shift = RPR0521_PXS_GAIN_SHIFT, | |
117 | .gain = rpr0521_pxs_gain, | |
118 | .size = ARRAY_SIZE(rpr0521_pxs_gain), | |
119 | }, | |
efa86e9f DB |
120 | [RPR0521_CHAN_ALS_DATA0] = { |
121 | .reg = RPR0521_REG_ALS_CTRL, | |
122 | .mask = RPR0521_ALS_DATA0_GAIN_MASK, | |
123 | .shift = RPR0521_ALS_DATA0_GAIN_SHIFT, | |
124 | .gain = rpr0521_als_gain, | |
125 | .size = ARRAY_SIZE(rpr0521_als_gain), | |
126 | }, | |
127 | [RPR0521_CHAN_ALS_DATA1] = { | |
128 | .reg = RPR0521_REG_ALS_CTRL, | |
129 | .mask = RPR0521_ALS_DATA1_GAIN_MASK, | |
130 | .shift = RPR0521_ALS_DATA1_GAIN_SHIFT, | |
131 | .gain = rpr0521_als_gain, | |
132 | .size = ARRAY_SIZE(rpr0521_als_gain), | |
133 | }, | |
efa86e9f DB |
134 | }; |
135 | ||
c91a88ef MK |
136 | struct rpr0521_samp_freq { |
137 | int als_hz; | |
138 | int als_uhz; | |
139 | int pxs_hz; | |
140 | int pxs_uhz; | |
141 | }; | |
142 | ||
143 | static const struct rpr0521_samp_freq rpr0521_samp_freq_i[13] = { | |
144 | /* {ALS, PXS}, W==currently writable option */ | |
145 | {0, 0, 0, 0}, /* W0000, 0=standby */ | |
146 | {0, 0, 100, 0}, /* 0001 */ | |
147 | {0, 0, 25, 0}, /* 0010 */ | |
148 | {0, 0, 10, 0}, /* 0011 */ | |
149 | {0, 0, 2, 500000}, /* 0100 */ | |
150 | {10, 0, 20, 0}, /* 0101 */ | |
151 | {10, 0, 10, 0}, /* W0110 */ | |
152 | {10, 0, 2, 500000}, /* 0111 */ | |
153 | {2, 500000, 20, 0}, /* 1000, measurement 100ms, sleep 300ms */ | |
154 | {2, 500000, 10, 0}, /* 1001, measurement 100ms, sleep 300ms */ | |
155 | {2, 500000, 0, 0}, /* 1010, high sensitivity mode */ | |
156 | {2, 500000, 2, 500000}, /* W1011, high sensitivity mode */ | |
157 | {20, 0, 20, 0} /* 1100, ALS_data x 0.5, see specification P.18 */ | |
158 | }; | |
159 | ||
efa86e9f DB |
160 | struct rpr0521_data { |
161 | struct i2c_client *client; | |
162 | ||
163 | /* protect device params updates (e.g state, gain) */ | |
164 | struct mutex lock; | |
165 | ||
166 | /* device active status */ | |
167 | bool als_dev_en; | |
168 | bool pxs_dev_en; | |
169 | ||
484c314b | 170 | /* optimize runtime pm ops - enable/disable device only if needed */ |
efa86e9f DB |
171 | bool als_ps_need_en; |
172 | bool pxs_ps_need_en; | |
484c314b MK |
173 | bool als_need_dis; |
174 | bool pxs_need_dis; | |
efa86e9f DB |
175 | |
176 | struct regmap *regmap; | |
177 | }; | |
178 | ||
179 | static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL); | |
180 | static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL); | |
181 | ||
c91a88ef MK |
182 | /* |
183 | * Start with easy freq first, whole table of freq combinations is more | |
184 | * complicated. | |
185 | */ | |
186 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("2.5 10"); | |
187 | ||
efa86e9f DB |
188 | static struct attribute *rpr0521_attributes[] = { |
189 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, | |
190 | &iio_const_attr_in_proximity_scale_available.dev_attr.attr, | |
c91a88ef | 191 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
efa86e9f DB |
192 | NULL, |
193 | }; | |
194 | ||
195 | static const struct attribute_group rpr0521_attribute_group = { | |
196 | .attrs = rpr0521_attributes, | |
197 | }; | |
198 | ||
199 | static const struct iio_chan_spec rpr0521_channels[] = { | |
9ece370b MK |
200 | { |
201 | .type = IIO_PROXIMITY, | |
202 | .address = RPR0521_CHAN_PXS, | |
203 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | | |
204 | BIT(IIO_CHAN_INFO_OFFSET) | | |
205 | BIT(IIO_CHAN_INFO_SCALE), | |
206 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), | |
207 | }, | |
efa86e9f DB |
208 | { |
209 | .type = IIO_INTENSITY, | |
210 | .modified = 1, | |
211 | .address = RPR0521_CHAN_ALS_DATA0, | |
212 | .channel2 = IIO_MOD_LIGHT_BOTH, | |
213 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | | |
214 | BIT(IIO_CHAN_INFO_SCALE), | |
c91a88ef | 215 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
efa86e9f DB |
216 | }, |
217 | { | |
218 | .type = IIO_INTENSITY, | |
219 | .modified = 1, | |
220 | .address = RPR0521_CHAN_ALS_DATA1, | |
221 | .channel2 = IIO_MOD_LIGHT_IR, | |
222 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | | |
223 | BIT(IIO_CHAN_INFO_SCALE), | |
c91a88ef | 224 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
efa86e9f | 225 | }, |
efa86e9f DB |
226 | }; |
227 | ||
228 | static int rpr0521_als_enable(struct rpr0521_data *data, u8 status) | |
229 | { | |
230 | int ret; | |
231 | ||
232 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, | |
233 | RPR0521_MODE_ALS_MASK, | |
234 | status); | |
235 | if (ret < 0) | |
236 | return ret; | |
237 | ||
f87fa261 MK |
238 | if (status & RPR0521_MODE_ALS_MASK) |
239 | data->als_dev_en = true; | |
240 | else | |
241 | data->als_dev_en = false; | |
efa86e9f DB |
242 | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status) | |
247 | { | |
248 | int ret; | |
249 | ||
250 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, | |
251 | RPR0521_MODE_PXS_MASK, | |
252 | status); | |
253 | if (ret < 0) | |
254 | return ret; | |
255 | ||
f87fa261 MK |
256 | if (status & RPR0521_MODE_PXS_MASK) |
257 | data->pxs_dev_en = true; | |
258 | else | |
259 | data->pxs_dev_en = false; | |
efa86e9f DB |
260 | |
261 | return 0; | |
262 | } | |
263 | ||
264 | /** | |
265 | * rpr0521_set_power_state - handles runtime PM state and sensors enabled status | |
266 | * | |
267 | * @data: rpr0521 device private data | |
268 | * @on: state to be set for devices in @device_mask | |
269 | * @device_mask: bitmask specifying for which device we need to update @on state | |
270 | * | |
484c314b MK |
271 | * Calls for this function must be balanced so that each ON should have matching |
272 | * OFF. Otherwise pm usage_count gets out of sync. | |
efa86e9f DB |
273 | */ |
274 | static int rpr0521_set_power_state(struct rpr0521_data *data, bool on, | |
275 | u8 device_mask) | |
276 | { | |
277 | #ifdef CONFIG_PM | |
278 | int ret; | |
efa86e9f DB |
279 | |
280 | if (device_mask & RPR0521_MODE_ALS_MASK) { | |
484c314b MK |
281 | data->als_ps_need_en = on; |
282 | data->als_need_dis = !on; | |
efa86e9f DB |
283 | } |
284 | ||
285 | if (device_mask & RPR0521_MODE_PXS_MASK) { | |
484c314b MK |
286 | data->pxs_ps_need_en = on; |
287 | data->pxs_need_dis = !on; | |
efa86e9f DB |
288 | } |
289 | ||
484c314b MK |
290 | /* |
291 | * On: _resume() is called only when we are suspended | |
292 | * Off: _suspend() is called after delay if _resume() is not | |
293 | * called before that. | |
294 | * Note: If either measurement is re-enabled before _suspend(), | |
295 | * both stay enabled until _suspend(). | |
296 | */ | |
efa86e9f DB |
297 | if (on) { |
298 | ret = pm_runtime_get_sync(&data->client->dev); | |
299 | } else { | |
300 | pm_runtime_mark_last_busy(&data->client->dev); | |
301 | ret = pm_runtime_put_autosuspend(&data->client->dev); | |
302 | } | |
303 | if (ret < 0) { | |
304 | dev_err(&data->client->dev, | |
305 | "Failed: rpr0521_set_power_state for %d, ret %d\n", | |
306 | on, ret); | |
307 | if (on) | |
308 | pm_runtime_put_noidle(&data->client->dev); | |
309 | ||
310 | return ret; | |
311 | } | |
484c314b MK |
312 | |
313 | if (on) { | |
314 | /* If _resume() was not called, enable measurement now. */ | |
315 | if (data->als_ps_need_en) { | |
316 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); | |
317 | if (ret) | |
318 | return ret; | |
319 | data->als_ps_need_en = false; | |
320 | } | |
321 | ||
322 | if (data->pxs_ps_need_en) { | |
323 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); | |
324 | if (ret) | |
325 | return ret; | |
326 | data->pxs_ps_need_en = false; | |
327 | } | |
328 | } | |
efa86e9f DB |
329 | #endif |
330 | return 0; | |
331 | } | |
332 | ||
333 | static int rpr0521_get_gain(struct rpr0521_data *data, int chan, | |
334 | int *val, int *val2) | |
335 | { | |
336 | int ret, reg, idx; | |
337 | ||
338 | ret = regmap_read(data->regmap, rpr0521_gain[chan].reg, ®); | |
339 | if (ret < 0) | |
340 | return ret; | |
341 | ||
342 | idx = (rpr0521_gain[chan].mask & reg) >> rpr0521_gain[chan].shift; | |
343 | *val = rpr0521_gain[chan].gain[idx].scale; | |
344 | *val2 = rpr0521_gain[chan].gain[idx].uscale; | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static int rpr0521_set_gain(struct rpr0521_data *data, int chan, | |
350 | int val, int val2) | |
351 | { | |
352 | int i, idx = -EINVAL; | |
353 | ||
354 | /* get gain index */ | |
355 | for (i = 0; i < rpr0521_gain[chan].size; i++) | |
356 | if (val == rpr0521_gain[chan].gain[i].scale && | |
357 | val2 == rpr0521_gain[chan].gain[i].uscale) { | |
358 | idx = i; | |
359 | break; | |
360 | } | |
361 | ||
362 | if (idx < 0) | |
363 | return idx; | |
364 | ||
365 | return regmap_update_bits(data->regmap, rpr0521_gain[chan].reg, | |
366 | rpr0521_gain[chan].mask, | |
367 | idx << rpr0521_gain[chan].shift); | |
368 | } | |
369 | ||
c91a88ef MK |
370 | static int rpr0521_read_samp_freq(struct rpr0521_data *data, |
371 | enum iio_chan_type chan_type, | |
372 | int *val, int *val2) | |
373 | { | |
374 | int reg, ret; | |
375 | ||
376 | ret = regmap_read(data->regmap, RPR0521_REG_MODE_CTRL, ®); | |
377 | if (ret < 0) | |
378 | return ret; | |
379 | ||
380 | reg &= RPR0521_MODE_MEAS_TIME_MASK; | |
381 | if (reg >= ARRAY_SIZE(rpr0521_samp_freq_i)) | |
382 | return -EINVAL; | |
383 | ||
384 | switch (chan_type) { | |
385 | case IIO_INTENSITY: | |
386 | *val = rpr0521_samp_freq_i[reg].als_hz; | |
387 | *val2 = rpr0521_samp_freq_i[reg].als_uhz; | |
388 | return 0; | |
389 | ||
390 | case IIO_PROXIMITY: | |
391 | *val = rpr0521_samp_freq_i[reg].pxs_hz; | |
392 | *val2 = rpr0521_samp_freq_i[reg].pxs_uhz; | |
393 | return 0; | |
394 | ||
395 | default: | |
396 | return -EINVAL; | |
397 | } | |
398 | } | |
399 | ||
400 | static int rpr0521_write_samp_freq_common(struct rpr0521_data *data, | |
401 | enum iio_chan_type chan_type, | |
402 | int val, int val2) | |
403 | { | |
404 | int i; | |
405 | ||
406 | /* | |
407 | * Ignore channel | |
408 | * both pxs and als are setup only to same freq because of simplicity | |
409 | */ | |
410 | switch (val) { | |
411 | case 0: | |
412 | i = 0; | |
413 | break; | |
414 | ||
415 | case 2: | |
416 | if (val2 != 500000) | |
417 | return -EINVAL; | |
418 | ||
419 | i = 11; | |
420 | break; | |
421 | ||
422 | case 10: | |
423 | i = 6; | |
424 | break; | |
425 | ||
426 | default: | |
427 | return -EINVAL; | |
428 | } | |
429 | ||
430 | return regmap_update_bits(data->regmap, | |
431 | RPR0521_REG_MODE_CTRL, | |
432 | RPR0521_MODE_MEAS_TIME_MASK, | |
433 | i); | |
434 | } | |
435 | ||
734c4423 MK |
436 | static int rpr0521_read_ps_offset(struct rpr0521_data *data, int *offset) |
437 | { | |
438 | int ret; | |
439 | __le16 buffer; | |
440 | ||
441 | ret = regmap_bulk_read(data->regmap, | |
442 | RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer)); | |
443 | ||
444 | if (ret < 0) { | |
445 | dev_err(&data->client->dev, "Failed to read PS OFFSET register\n"); | |
446 | return ret; | |
447 | } | |
448 | *offset = le16_to_cpu(buffer); | |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
453 | static int rpr0521_write_ps_offset(struct rpr0521_data *data, int offset) | |
454 | { | |
455 | int ret; | |
456 | __le16 buffer; | |
457 | ||
458 | buffer = cpu_to_le16(offset & 0x3ff); | |
459 | ret = regmap_raw_write(data->regmap, | |
460 | RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer)); | |
461 | ||
462 | if (ret < 0) { | |
463 | dev_err(&data->client->dev, "Failed to write PS OFFSET register\n"); | |
464 | return ret; | |
465 | } | |
466 | ||
467 | return ret; | |
468 | } | |
469 | ||
efa86e9f DB |
470 | static int rpr0521_read_raw(struct iio_dev *indio_dev, |
471 | struct iio_chan_spec const *chan, int *val, | |
472 | int *val2, long mask) | |
473 | { | |
474 | struct rpr0521_data *data = iio_priv(indio_dev); | |
475 | int ret; | |
476 | u8 device_mask; | |
477 | __le16 raw_data; | |
478 | ||
479 | switch (mask) { | |
480 | case IIO_CHAN_INFO_RAW: | |
481 | if (chan->type != IIO_INTENSITY && chan->type != IIO_PROXIMITY) | |
482 | return -EINVAL; | |
483 | ||
484 | device_mask = rpr0521_data_reg[chan->address].device_mask; | |
485 | ||
486 | mutex_lock(&data->lock); | |
487 | ret = rpr0521_set_power_state(data, true, device_mask); | |
488 | if (ret < 0) { | |
489 | mutex_unlock(&data->lock); | |
490 | return ret; | |
491 | } | |
492 | ||
493 | ret = regmap_bulk_read(data->regmap, | |
494 | rpr0521_data_reg[chan->address].address, | |
ae591650 | 495 | &raw_data, sizeof(raw_data)); |
efa86e9f DB |
496 | if (ret < 0) { |
497 | rpr0521_set_power_state(data, false, device_mask); | |
498 | mutex_unlock(&data->lock); | |
499 | return ret; | |
500 | } | |
501 | ||
502 | ret = rpr0521_set_power_state(data, false, device_mask); | |
503 | mutex_unlock(&data->lock); | |
504 | if (ret < 0) | |
505 | return ret; | |
506 | ||
507 | *val = le16_to_cpu(raw_data); | |
508 | ||
509 | return IIO_VAL_INT; | |
624c389e | 510 | |
efa86e9f DB |
511 | case IIO_CHAN_INFO_SCALE: |
512 | mutex_lock(&data->lock); | |
513 | ret = rpr0521_get_gain(data, chan->address, val, val2); | |
514 | mutex_unlock(&data->lock); | |
515 | if (ret < 0) | |
516 | return ret; | |
517 | ||
518 | return IIO_VAL_INT_PLUS_MICRO; | |
624c389e | 519 | |
c91a88ef MK |
520 | case IIO_CHAN_INFO_SAMP_FREQ: |
521 | mutex_lock(&data->lock); | |
522 | ret = rpr0521_read_samp_freq(data, chan->type, val, val2); | |
523 | mutex_unlock(&data->lock); | |
524 | if (ret < 0) | |
525 | return ret; | |
526 | ||
527 | return IIO_VAL_INT_PLUS_MICRO; | |
528 | ||
734c4423 MK |
529 | case IIO_CHAN_INFO_OFFSET: |
530 | mutex_lock(&data->lock); | |
531 | ret = rpr0521_read_ps_offset(data, val); | |
532 | mutex_unlock(&data->lock); | |
533 | if (ret < 0) | |
534 | return ret; | |
535 | ||
536 | return IIO_VAL_INT; | |
537 | ||
efa86e9f DB |
538 | default: |
539 | return -EINVAL; | |
540 | } | |
541 | } | |
542 | ||
543 | static int rpr0521_write_raw(struct iio_dev *indio_dev, | |
544 | struct iio_chan_spec const *chan, int val, | |
545 | int val2, long mask) | |
546 | { | |
547 | struct rpr0521_data *data = iio_priv(indio_dev); | |
548 | int ret; | |
549 | ||
550 | switch (mask) { | |
551 | case IIO_CHAN_INFO_SCALE: | |
552 | mutex_lock(&data->lock); | |
553 | ret = rpr0521_set_gain(data, chan->address, val, val2); | |
554 | mutex_unlock(&data->lock); | |
555 | ||
556 | return ret; | |
624c389e | 557 | |
c91a88ef MK |
558 | case IIO_CHAN_INFO_SAMP_FREQ: |
559 | mutex_lock(&data->lock); | |
560 | ret = rpr0521_write_samp_freq_common(data, chan->type, | |
561 | val, val2); | |
562 | mutex_unlock(&data->lock); | |
563 | ||
564 | return ret; | |
565 | ||
734c4423 MK |
566 | case IIO_CHAN_INFO_OFFSET: |
567 | mutex_lock(&data->lock); | |
568 | ret = rpr0521_write_ps_offset(data, val); | |
569 | mutex_unlock(&data->lock); | |
570 | ||
571 | return ret; | |
572 | ||
efa86e9f DB |
573 | default: |
574 | return -EINVAL; | |
575 | } | |
576 | } | |
577 | ||
578 | static const struct iio_info rpr0521_info = { | |
579 | .driver_module = THIS_MODULE, | |
580 | .read_raw = rpr0521_read_raw, | |
581 | .write_raw = rpr0521_write_raw, | |
582 | .attrs = &rpr0521_attribute_group, | |
583 | }; | |
584 | ||
585 | static int rpr0521_init(struct rpr0521_data *data) | |
586 | { | |
587 | int ret; | |
588 | int id; | |
589 | ||
590 | ret = regmap_read(data->regmap, RPR0521_REG_ID, &id); | |
591 | if (ret < 0) { | |
592 | dev_err(&data->client->dev, "Failed to read REG_ID register\n"); | |
593 | return ret; | |
594 | } | |
595 | ||
596 | if (id != RPR0521_MANUFACT_ID) { | |
597 | dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n", | |
598 | id, RPR0521_MANUFACT_ID); | |
599 | return -ENODEV; | |
600 | } | |
601 | ||
602 | /* set default measurement time - 100 ms for both ALS and PS */ | |
603 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, | |
604 | RPR0521_MODE_MEAS_TIME_MASK, | |
605 | RPR0521_DEFAULT_MEAS_TIME); | |
606 | if (ret) { | |
607 | pr_err("regmap_update_bits returned %d\n", ret); | |
608 | return ret; | |
609 | } | |
610 | ||
484c314b | 611 | #ifndef CONFIG_PM |
efa86e9f DB |
612 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); |
613 | if (ret < 0) | |
614 | return ret; | |
615 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); | |
616 | if (ret < 0) | |
617 | return ret; | |
484c314b | 618 | #endif |
efa86e9f DB |
619 | |
620 | return 0; | |
621 | } | |
622 | ||
623 | static int rpr0521_poweroff(struct rpr0521_data *data) | |
624 | { | |
625 | int ret; | |
626 | ||
627 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, | |
628 | RPR0521_MODE_ALS_MASK | | |
629 | RPR0521_MODE_PXS_MASK, | |
630 | RPR0521_MODE_ALS_DISABLE | | |
631 | RPR0521_MODE_PXS_DISABLE); | |
632 | if (ret < 0) | |
633 | return ret; | |
634 | ||
635 | data->als_dev_en = false; | |
636 | data->pxs_dev_en = false; | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | static bool rpr0521_is_volatile_reg(struct device *dev, unsigned int reg) | |
642 | { | |
643 | switch (reg) { | |
644 | case RPR0521_REG_MODE_CTRL: | |
645 | case RPR0521_REG_ALS_CTRL: | |
646 | case RPR0521_REG_PXS_CTRL: | |
647 | return false; | |
648 | default: | |
649 | return true; | |
650 | } | |
651 | } | |
652 | ||
653 | static const struct regmap_config rpr0521_regmap_config = { | |
654 | .name = RPR0521_REGMAP_NAME, | |
655 | ||
656 | .reg_bits = 8, | |
657 | .val_bits = 8, | |
658 | ||
659 | .max_register = RPR0521_REG_ID, | |
660 | .cache_type = REGCACHE_RBTREE, | |
661 | .volatile_reg = rpr0521_is_volatile_reg, | |
662 | }; | |
663 | ||
664 | static int rpr0521_probe(struct i2c_client *client, | |
665 | const struct i2c_device_id *id) | |
666 | { | |
667 | struct rpr0521_data *data; | |
668 | struct iio_dev *indio_dev; | |
669 | struct regmap *regmap; | |
670 | int ret; | |
671 | ||
672 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
673 | if (!indio_dev) | |
674 | return -ENOMEM; | |
675 | ||
676 | regmap = devm_regmap_init_i2c(client, &rpr0521_regmap_config); | |
677 | if (IS_ERR(regmap)) { | |
678 | dev_err(&client->dev, "regmap_init failed!\n"); | |
679 | return PTR_ERR(regmap); | |
680 | } | |
681 | ||
682 | data = iio_priv(indio_dev); | |
683 | i2c_set_clientdata(client, indio_dev); | |
684 | data->client = client; | |
685 | data->regmap = regmap; | |
686 | ||
687 | mutex_init(&data->lock); | |
688 | ||
689 | indio_dev->dev.parent = &client->dev; | |
690 | indio_dev->info = &rpr0521_info; | |
691 | indio_dev->name = RPR0521_DRV_NAME; | |
692 | indio_dev->channels = rpr0521_channels; | |
693 | indio_dev->num_channels = ARRAY_SIZE(rpr0521_channels); | |
694 | indio_dev->modes = INDIO_DIRECT_MODE; | |
695 | ||
696 | ret = rpr0521_init(data); | |
697 | if (ret < 0) { | |
698 | dev_err(&client->dev, "rpr0521 chip init failed\n"); | |
699 | return ret; | |
700 | } | |
efa86e9f DB |
701 | |
702 | ret = pm_runtime_set_active(&client->dev); | |
703 | if (ret < 0) | |
12d74949 | 704 | goto err_poweroff; |
efa86e9f DB |
705 | |
706 | pm_runtime_enable(&client->dev); | |
707 | pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS); | |
708 | pm_runtime_use_autosuspend(&client->dev); | |
709 | ||
12d74949 MK |
710 | ret = iio_device_register(indio_dev); |
711 | if (ret) | |
712 | goto err_pm_disable; | |
713 | ||
714 | return 0; | |
715 | ||
716 | err_pm_disable: | |
717 | pm_runtime_disable(&client->dev); | |
718 | pm_runtime_set_suspended(&client->dev); | |
719 | pm_runtime_put_noidle(&client->dev); | |
720 | err_poweroff: | |
721 | rpr0521_poweroff(data); | |
722 | ||
723 | return ret; | |
efa86e9f DB |
724 | } |
725 | ||
726 | static int rpr0521_remove(struct i2c_client *client) | |
727 | { | |
728 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
729 | ||
7d0ead5c AR |
730 | iio_device_unregister(indio_dev); |
731 | ||
efa86e9f DB |
732 | pm_runtime_disable(&client->dev); |
733 | pm_runtime_set_suspended(&client->dev); | |
734 | pm_runtime_put_noidle(&client->dev); | |
735 | ||
efa86e9f DB |
736 | rpr0521_poweroff(iio_priv(indio_dev)); |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
741 | #ifdef CONFIG_PM | |
742 | static int rpr0521_runtime_suspend(struct device *dev) | |
743 | { | |
744 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
745 | struct rpr0521_data *data = iio_priv(indio_dev); | |
746 | int ret; | |
747 | ||
efa86e9f | 748 | mutex_lock(&data->lock); |
484c314b MK |
749 | /* If measurements are enabled, enable them on resume */ |
750 | if (!data->als_need_dis) | |
751 | data->als_ps_need_en = data->als_dev_en; | |
752 | if (!data->pxs_need_dis) | |
753 | data->pxs_ps_need_en = data->pxs_dev_en; | |
754 | ||
755 | /* disable channels and sets {als,pxs}_dev_en to false */ | |
efa86e9f | 756 | ret = rpr0521_poweroff(data); |
484c314b | 757 | regcache_mark_dirty(data->regmap); |
efa86e9f DB |
758 | mutex_unlock(&data->lock); |
759 | ||
760 | return ret; | |
761 | } | |
762 | ||
763 | static int rpr0521_runtime_resume(struct device *dev) | |
764 | { | |
765 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
766 | struct rpr0521_data *data = iio_priv(indio_dev); | |
767 | int ret; | |
768 | ||
484c314b | 769 | regcache_sync(data->regmap); |
efa86e9f DB |
770 | if (data->als_ps_need_en) { |
771 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); | |
772 | if (ret < 0) | |
773 | return ret; | |
774 | data->als_ps_need_en = false; | |
775 | } | |
776 | ||
777 | if (data->pxs_ps_need_en) { | |
778 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); | |
779 | if (ret < 0) | |
780 | return ret; | |
781 | data->pxs_ps_need_en = false; | |
782 | } | |
484c314b | 783 | msleep(100); //wait for first measurement result |
efa86e9f DB |
784 | |
785 | return 0; | |
786 | } | |
787 | #endif | |
788 | ||
789 | static const struct dev_pm_ops rpr0521_pm_ops = { | |
790 | SET_RUNTIME_PM_OPS(rpr0521_runtime_suspend, | |
791 | rpr0521_runtime_resume, NULL) | |
792 | }; | |
793 | ||
794 | static const struct acpi_device_id rpr0521_acpi_match[] = { | |
795 | {"RPR0521", 0}, | |
796 | { } | |
797 | }; | |
798 | MODULE_DEVICE_TABLE(acpi, rpr0521_acpi_match); | |
799 | ||
800 | static const struct i2c_device_id rpr0521_id[] = { | |
801 | {"rpr0521", 0}, | |
802 | { } | |
803 | }; | |
804 | ||
805 | MODULE_DEVICE_TABLE(i2c, rpr0521_id); | |
806 | ||
807 | static struct i2c_driver rpr0521_driver = { | |
808 | .driver = { | |
809 | .name = RPR0521_DRV_NAME, | |
810 | .pm = &rpr0521_pm_ops, | |
811 | .acpi_match_table = ACPI_PTR(rpr0521_acpi_match), | |
812 | }, | |
813 | .probe = rpr0521_probe, | |
814 | .remove = rpr0521_remove, | |
815 | .id_table = rpr0521_id, | |
816 | }; | |
817 | ||
818 | module_i2c_driver(rpr0521_driver); | |
819 | ||
820 | MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); | |
821 | MODULE_DESCRIPTION("RPR0521 ROHM Ambient Light and Proximity Sensor driver"); | |
822 | MODULE_LICENSE("GPL v2"); |