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2b27bdcc | 1 | // SPDX-License-Identifier: GPL-2.0-only |
92b1f84d SO |
2 | /* |
3 | * This file is part of the APDS990x sensor driver. | |
4 | * Chip is combined proximity and ambient light sensor. | |
5 | * | |
6 | * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). | |
7 | * | |
8 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
92b1f84d SO |
9 | */ |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/mutex.h> | |
16 | #include <linux/regulator/consumer.h> | |
17 | #include <linux/pm_runtime.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/wait.h> | |
20 | #include <linux/slab.h> | |
610387d1 | 21 | #include <linux/platform_data/apds990x.h> |
92b1f84d SO |
22 | |
23 | /* Register map */ | |
24 | #define APDS990X_ENABLE 0x00 /* Enable of states and interrupts */ | |
25 | #define APDS990X_ATIME 0x01 /* ALS ADC time */ | |
26 | #define APDS990X_PTIME 0x02 /* Proximity ADC time */ | |
27 | #define APDS990X_WTIME 0x03 /* Wait time */ | |
28 | #define APDS990X_AILTL 0x04 /* ALS interrupt low threshold low byte */ | |
29 | #define APDS990X_AILTH 0x05 /* ALS interrupt low threshold hi byte */ | |
30 | #define APDS990X_AIHTL 0x06 /* ALS interrupt hi threshold low byte */ | |
31 | #define APDS990X_AIHTH 0x07 /* ALS interrupt hi threshold hi byte */ | |
32 | #define APDS990X_PILTL 0x08 /* Proximity interrupt low threshold low byte */ | |
33 | #define APDS990X_PILTH 0x09 /* Proximity interrupt low threshold hi byte */ | |
34 | #define APDS990X_PIHTL 0x0a /* Proximity interrupt hi threshold low byte */ | |
35 | #define APDS990X_PIHTH 0x0b /* Proximity interrupt hi threshold hi byte */ | |
36 | #define APDS990X_PERS 0x0c /* Interrupt persistence filters */ | |
37 | #define APDS990X_CONFIG 0x0d /* Configuration */ | |
38 | #define APDS990X_PPCOUNT 0x0e /* Proximity pulse count */ | |
39 | #define APDS990X_CONTROL 0x0f /* Gain control register */ | |
40 | #define APDS990X_REV 0x11 /* Revision Number */ | |
41 | #define APDS990X_ID 0x12 /* Device ID */ | |
42 | #define APDS990X_STATUS 0x13 /* Device status */ | |
43 | #define APDS990X_CDATAL 0x14 /* Clear ADC low data register */ | |
44 | #define APDS990X_CDATAH 0x15 /* Clear ADC high data register */ | |
45 | #define APDS990X_IRDATAL 0x16 /* IR ADC low data register */ | |
46 | #define APDS990X_IRDATAH 0x17 /* IR ADC high data register */ | |
47 | #define APDS990X_PDATAL 0x18 /* Proximity ADC low data register */ | |
48 | #define APDS990X_PDATAH 0x19 /* Proximity ADC high data register */ | |
49 | ||
50 | /* Control */ | |
51 | #define APDS990X_MAX_AGAIN 3 | |
52 | ||
53 | /* Enable register */ | |
54 | #define APDS990X_EN_PIEN (0x1 << 5) | |
55 | #define APDS990X_EN_AIEN (0x1 << 4) | |
56 | #define APDS990X_EN_WEN (0x1 << 3) | |
57 | #define APDS990X_EN_PEN (0x1 << 2) | |
58 | #define APDS990X_EN_AEN (0x1 << 1) | |
59 | #define APDS990X_EN_PON (0x1 << 0) | |
60 | #define APDS990X_EN_DISABLE_ALL 0 | |
61 | ||
62 | /* Status register */ | |
63 | #define APDS990X_ST_PINT (0x1 << 5) | |
64 | #define APDS990X_ST_AINT (0x1 << 4) | |
65 | ||
66 | /* I2C access types */ | |
67 | #define APDS990x_CMD_TYPE_MASK (0x03 << 5) | |
68 | #define APDS990x_CMD_TYPE_RB (0x00 << 5) /* Repeated byte */ | |
69 | #define APDS990x_CMD_TYPE_INC (0x01 << 5) /* Auto increment */ | |
70 | #define APDS990x_CMD_TYPE_SPE (0x03 << 5) /* Special function */ | |
71 | ||
72 | #define APDS990x_ADDR_SHIFT 0 | |
73 | #define APDS990x_CMD 0x80 | |
74 | ||
75 | /* Interrupt ack commands */ | |
76 | #define APDS990X_INT_ACK_ALS 0x6 | |
77 | #define APDS990X_INT_ACK_PS 0x5 | |
78 | #define APDS990X_INT_ACK_BOTH 0x7 | |
79 | ||
80 | /* ptime */ | |
81 | #define APDS990X_PTIME_DEFAULT 0xff /* Recommended conversion time 2.7ms*/ | |
82 | ||
83 | /* wtime */ | |
84 | #define APDS990X_WTIME_DEFAULT 0xee /* ~50ms wait time */ | |
85 | ||
86 | #define APDS990X_TIME_TO_ADC 1024 /* One timetick as ADC count value */ | |
87 | ||
88 | /* Persistence */ | |
89 | #define APDS990X_APERS_SHIFT 0 | |
90 | #define APDS990X_PPERS_SHIFT 4 | |
91 | ||
92 | /* Supported ID:s */ | |
93 | #define APDS990X_ID_0 0x0 | |
94 | #define APDS990X_ID_4 0x4 | |
95 | #define APDS990X_ID_29 0x29 | |
96 | ||
97 | /* pgain and pdiode settings */ | |
98 | #define APDS_PGAIN_1X 0x0 | |
99 | #define APDS_PDIODE_IR 0x2 | |
100 | ||
101 | #define APDS990X_LUX_OUTPUT_SCALE 10 | |
102 | ||
103 | /* Reverse chip factors for threshold calculation */ | |
104 | struct reverse_factors { | |
105 | u32 afactor; | |
106 | int cf1; | |
107 | int irf1; | |
108 | int cf2; | |
109 | int irf2; | |
110 | }; | |
111 | ||
112 | struct apds990x_chip { | |
113 | struct apds990x_platform_data *pdata; | |
114 | struct i2c_client *client; | |
115 | struct mutex mutex; /* avoid parallel access */ | |
116 | struct regulator_bulk_data regs[2]; | |
117 | wait_queue_head_t wait; | |
118 | ||
119 | int prox_en; | |
120 | bool prox_continuous_mode; | |
121 | bool lux_wait_fresh_res; | |
122 | ||
123 | /* Chip parameters */ | |
124 | struct apds990x_chip_factors cf; | |
125 | struct reverse_factors rcf; | |
126 | u16 atime; /* als integration time */ | |
127 | u16 arate; /* als reporting rate */ | |
128 | u16 a_max_result; /* Max possible ADC value with current atime */ | |
129 | u8 again_meas; /* Gain used in last measurement */ | |
130 | u8 again_next; /* Next calculated gain */ | |
131 | u8 pgain; | |
132 | u8 pdiode; | |
133 | u8 pdrive; | |
134 | u8 lux_persistence; | |
135 | u8 prox_persistence; | |
136 | ||
137 | u32 lux_raw; | |
138 | u32 lux; | |
139 | u16 lux_clear; | |
140 | u16 lux_ir; | |
141 | u16 lux_calib; | |
142 | u32 lux_thres_hi; | |
143 | u32 lux_thres_lo; | |
144 | ||
145 | u32 prox_thres; | |
146 | u16 prox_data; | |
147 | u16 prox_calib; | |
148 | ||
149 | char chipname[10]; | |
150 | u8 revision; | |
151 | }; | |
152 | ||
153 | #define APDS_CALIB_SCALER 8192 | |
154 | #define APDS_LUX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER) | |
155 | #define APDS_PROX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER) | |
156 | ||
157 | #define APDS_PROX_DEF_THRES 600 | |
158 | #define APDS_PROX_HYSTERESIS 50 | |
159 | #define APDS_LUX_DEF_THRES_HI 101 | |
160 | #define APDS_LUX_DEF_THRES_LO 100 | |
161 | #define APDS_DEFAULT_PROX_PERS 1 | |
162 | ||
163 | #define APDS_TIMEOUT 2000 | |
164 | #define APDS_STARTUP_DELAY 25000 /* us */ | |
165 | #define APDS_RANGE 65535 | |
166 | #define APDS_PROX_RANGE 1023 | |
167 | #define APDS_LUX_GAIN_LO_LIMIT 100 | |
168 | #define APDS_LUX_GAIN_LO_LIMIT_STRICT 25 | |
169 | ||
170 | #define TIMESTEP 87 /* 2.7ms is about 87 / 32 */ | |
171 | #define TIME_STEP_SCALER 32 | |
172 | ||
173 | #define APDS_LUX_AVERAGING_TIME 50 /* tolerates 50/60Hz ripple */ | |
174 | #define APDS_LUX_DEFAULT_RATE 200 | |
175 | ||
176 | static const u8 again[] = {1, 8, 16, 120}; /* ALS gain steps */ | |
92b1f84d SO |
177 | |
178 | /* Following two tables must match i.e 10Hz rate means 1 as persistence value */ | |
179 | static const u16 arates_hz[] = {10, 5, 2, 1}; | |
180 | static const u8 apersis[] = {1, 2, 4, 5}; | |
181 | ||
182 | /* Regulators */ | |
183 | static const char reg_vcc[] = "Vdd"; | |
184 | static const char reg_vled[] = "Vled"; | |
185 | ||
186 | static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data) | |
187 | { | |
188 | struct i2c_client *client = chip->client; | |
189 | s32 ret; | |
190 | ||
191 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
192 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB; | |
193 | ||
194 | ret = i2c_smbus_read_byte_data(client, reg); | |
195 | *data = ret; | |
196 | return (int)ret; | |
197 | } | |
198 | ||
199 | static int apds990x_read_word(struct apds990x_chip *chip, u8 reg, u16 *data) | |
200 | { | |
201 | struct i2c_client *client = chip->client; | |
202 | s32 ret; | |
203 | ||
204 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
205 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC; | |
206 | ||
207 | ret = i2c_smbus_read_word_data(client, reg); | |
208 | *data = ret; | |
209 | return (int)ret; | |
210 | } | |
211 | ||
212 | static int apds990x_write_byte(struct apds990x_chip *chip, u8 reg, u8 data) | |
213 | { | |
214 | struct i2c_client *client = chip->client; | |
215 | s32 ret; | |
216 | ||
217 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
218 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB; | |
219 | ||
220 | ret = i2c_smbus_write_byte_data(client, reg, data); | |
221 | return (int)ret; | |
222 | } | |
223 | ||
224 | static int apds990x_write_word(struct apds990x_chip *chip, u8 reg, u16 data) | |
225 | { | |
226 | struct i2c_client *client = chip->client; | |
227 | s32 ret; | |
228 | ||
229 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
230 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC; | |
231 | ||
232 | ret = i2c_smbus_write_word_data(client, reg, data); | |
233 | return (int)ret; | |
234 | } | |
235 | ||
236 | static int apds990x_mode_on(struct apds990x_chip *chip) | |
237 | { | |
238 | /* ALS is mandatory, proximity optional */ | |
239 | u8 reg = APDS990X_EN_AIEN | APDS990X_EN_PON | APDS990X_EN_AEN | | |
240 | APDS990X_EN_WEN; | |
241 | ||
242 | if (chip->prox_en) | |
243 | reg |= APDS990X_EN_PIEN | APDS990X_EN_PEN; | |
244 | ||
245 | return apds990x_write_byte(chip, APDS990X_ENABLE, reg); | |
246 | } | |
247 | ||
248 | static u16 apds990x_lux_to_threshold(struct apds990x_chip *chip, u32 lux) | |
249 | { | |
250 | u32 thres; | |
251 | u32 cpl; | |
252 | u32 ir; | |
253 | ||
254 | if (lux == 0) | |
255 | return 0; | |
256 | else if (lux == APDS_RANGE) | |
257 | return APDS_RANGE; | |
258 | ||
259 | /* | |
260 | * Reported LUX value is a combination of the IR and CLEAR channel | |
261 | * values. However, interrupt threshold is only for clear channel. | |
262 | * This function approximates needed HW threshold value for a given | |
263 | * LUX value in the current lightning type. | |
264 | * IR level compared to visible light varies heavily depending on the | |
265 | * source of the light | |
266 | * | |
267 | * Calculate threshold value for the next measurement period. | |
268 | * Math: threshold = lux * cpl where | |
269 | * cpl = atime * again / (glass_attenuation * device_factor) | |
270 | * (count-per-lux) | |
271 | * | |
272 | * First remove calibration. Division by four is to avoid overflow | |
273 | */ | |
274 | lux = lux * (APDS_CALIB_SCALER / 4) / (chip->lux_calib / 4); | |
275 | ||
276 | /* Multiplication by 64 is to increase accuracy */ | |
277 | cpl = ((u32)chip->atime * (u32)again[chip->again_next] * | |
278 | APDS_PARAM_SCALE * 64) / (chip->cf.ga * chip->cf.df); | |
279 | ||
280 | thres = lux * cpl / 64; | |
281 | /* | |
282 | * Convert IR light from the latest result to match with | |
283 | * new gain step. This helps to adapt with the current | |
284 | * source of light. | |
285 | */ | |
286 | ir = (u32)chip->lux_ir * (u32)again[chip->again_next] / | |
287 | (u32)again[chip->again_meas]; | |
288 | ||
289 | /* | |
290 | * Compensate count with IR light impact | |
291 | * IAC1 > IAC2 (see apds990x_get_lux for formulas) | |
292 | */ | |
293 | if (chip->lux_clear * APDS_PARAM_SCALE >= | |
294 | chip->rcf.afactor * chip->lux_ir) | |
295 | thres = (chip->rcf.cf1 * thres + chip->rcf.irf1 * ir) / | |
296 | APDS_PARAM_SCALE; | |
297 | else | |
298 | thres = (chip->rcf.cf2 * thres + chip->rcf.irf2 * ir) / | |
299 | APDS_PARAM_SCALE; | |
300 | ||
301 | if (thres >= chip->a_max_result) | |
302 | thres = chip->a_max_result - 1; | |
303 | return thres; | |
304 | } | |
305 | ||
306 | static inline int apds990x_set_atime(struct apds990x_chip *chip, u32 time_ms) | |
307 | { | |
308 | u8 reg_value; | |
309 | ||
310 | chip->atime = time_ms; | |
311 | /* Formula is specified in the data sheet */ | |
312 | reg_value = 256 - ((time_ms * TIME_STEP_SCALER) / TIMESTEP); | |
313 | /* Calculate max ADC value for given integration time */ | |
314 | chip->a_max_result = (u16)(256 - reg_value) * APDS990X_TIME_TO_ADC; | |
315 | return apds990x_write_byte(chip, APDS990X_ATIME, reg_value); | |
316 | } | |
317 | ||
318 | /* Called always with mutex locked */ | |
319 | static int apds990x_refresh_pthres(struct apds990x_chip *chip, int data) | |
320 | { | |
321 | int ret, lo, hi; | |
322 | ||
323 | /* If the chip is not in use, don't try to access it */ | |
324 | if (pm_runtime_suspended(&chip->client->dev)) | |
325 | return 0; | |
326 | ||
327 | if (data < chip->prox_thres) { | |
328 | lo = 0; | |
329 | hi = chip->prox_thres; | |
330 | } else { | |
331 | lo = chip->prox_thres - APDS_PROX_HYSTERESIS; | |
332 | if (chip->prox_continuous_mode) | |
333 | hi = chip->prox_thres; | |
334 | else | |
335 | hi = APDS_RANGE; | |
336 | } | |
337 | ||
338 | ret = apds990x_write_word(chip, APDS990X_PILTL, lo); | |
339 | ret |= apds990x_write_word(chip, APDS990X_PIHTL, hi); | |
340 | return ret; | |
341 | } | |
342 | ||
343 | /* Called always with mutex locked */ | |
344 | static int apds990x_refresh_athres(struct apds990x_chip *chip) | |
345 | { | |
346 | int ret; | |
347 | /* If the chip is not in use, don't try to access it */ | |
348 | if (pm_runtime_suspended(&chip->client->dev)) | |
349 | return 0; | |
350 | ||
351 | ret = apds990x_write_word(chip, APDS990X_AILTL, | |
352 | apds990x_lux_to_threshold(chip, chip->lux_thres_lo)); | |
353 | ret |= apds990x_write_word(chip, APDS990X_AIHTL, | |
354 | apds990x_lux_to_threshold(chip, chip->lux_thres_hi)); | |
355 | ||
356 | return ret; | |
357 | } | |
358 | ||
359 | /* Called always with mutex locked */ | |
360 | static void apds990x_force_a_refresh(struct apds990x_chip *chip) | |
361 | { | |
362 | /* This will force ALS interrupt after the next measurement. */ | |
363 | apds990x_write_word(chip, APDS990X_AILTL, APDS_LUX_DEF_THRES_LO); | |
364 | apds990x_write_word(chip, APDS990X_AIHTL, APDS_LUX_DEF_THRES_HI); | |
365 | } | |
366 | ||
367 | /* Called always with mutex locked */ | |
368 | static void apds990x_force_p_refresh(struct apds990x_chip *chip) | |
369 | { | |
370 | /* This will force proximity interrupt after the next measurement. */ | |
371 | apds990x_write_word(chip, APDS990X_PILTL, APDS_PROX_DEF_THRES - 1); | |
372 | apds990x_write_word(chip, APDS990X_PIHTL, APDS_PROX_DEF_THRES); | |
373 | } | |
374 | ||
375 | /* Called always with mutex locked */ | |
376 | static int apds990x_calc_again(struct apds990x_chip *chip) | |
377 | { | |
378 | int curr_again = chip->again_meas; | |
379 | int next_again = chip->again_meas; | |
380 | int ret = 0; | |
381 | ||
382 | /* Calculate suitable als gain */ | |
383 | if (chip->lux_clear == chip->a_max_result) | |
384 | next_again -= 2; /* ALS saturated. Decrease gain by 2 steps */ | |
385 | else if (chip->lux_clear > chip->a_max_result / 2) | |
386 | next_again--; | |
387 | else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT) | |
388 | next_again += 2; /* Too dark. Increase gain by 2 steps */ | |
389 | else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT) | |
390 | next_again++; | |
391 | ||
392 | /* Limit gain to available range */ | |
393 | if (next_again < 0) | |
394 | next_again = 0; | |
395 | else if (next_again > APDS990X_MAX_AGAIN) | |
396 | next_again = APDS990X_MAX_AGAIN; | |
397 | ||
398 | /* Let's check can we trust the measured result */ | |
399 | if (chip->lux_clear == chip->a_max_result) | |
400 | /* Result can be totally garbage due to saturation */ | |
401 | ret = -ERANGE; | |
402 | else if (next_again != curr_again && | |
403 | chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT) | |
404 | /* | |
405 | * Gain is changed and measurement result is very small. | |
406 | * Result can be totally garbage due to underflow | |
407 | */ | |
408 | ret = -ERANGE; | |
409 | ||
410 | chip->again_next = next_again; | |
411 | apds990x_write_byte(chip, APDS990X_CONTROL, | |
412 | (chip->pdrive << 6) | | |
413 | (chip->pdiode << 4) | | |
414 | (chip->pgain << 2) | | |
415 | (chip->again_next << 0)); | |
416 | ||
417 | /* | |
418 | * Error means bad result -> re-measurement is needed. The forced | |
419 | * refresh uses fastest possible persistence setting to get result | |
420 | * as soon as possible. | |
421 | */ | |
422 | if (ret < 0) | |
423 | apds990x_force_a_refresh(chip); | |
424 | else | |
425 | apds990x_refresh_athres(chip); | |
426 | ||
427 | return ret; | |
428 | } | |
429 | ||
430 | /* Called always with mutex locked */ | |
431 | static int apds990x_get_lux(struct apds990x_chip *chip, int clear, int ir) | |
432 | { | |
433 | int iac, iac1, iac2; /* IR adjusted counts */ | |
434 | u32 lpc; /* Lux per count */ | |
435 | ||
436 | /* Formulas: | |
437 | * iac1 = CF1 * CLEAR_CH - IRF1 * IR_CH | |
438 | * iac2 = CF2 * CLEAR_CH - IRF2 * IR_CH | |
439 | */ | |
440 | iac1 = (chip->cf.cf1 * clear - chip->cf.irf1 * ir) / APDS_PARAM_SCALE; | |
441 | iac2 = (chip->cf.cf2 * clear - chip->cf.irf2 * ir) / APDS_PARAM_SCALE; | |
442 | ||
443 | iac = max(iac1, iac2); | |
444 | iac = max(iac, 0); | |
445 | ||
446 | lpc = APDS990X_LUX_OUTPUT_SCALE * (chip->cf.df * chip->cf.ga) / | |
447 | (u32)(again[chip->again_meas] * (u32)chip->atime); | |
448 | ||
449 | return (iac * lpc) / APDS_PARAM_SCALE; | |
450 | } | |
451 | ||
452 | static int apds990x_ack_int(struct apds990x_chip *chip, u8 mode) | |
453 | { | |
454 | struct i2c_client *client = chip->client; | |
455 | s32 ret; | |
456 | u8 reg = APDS990x_CMD | APDS990x_CMD_TYPE_SPE; | |
457 | ||
458 | switch (mode & (APDS990X_ST_AINT | APDS990X_ST_PINT)) { | |
459 | case APDS990X_ST_AINT: | |
460 | reg |= APDS990X_INT_ACK_ALS; | |
461 | break; | |
462 | case APDS990X_ST_PINT: | |
463 | reg |= APDS990X_INT_ACK_PS; | |
464 | break; | |
465 | default: | |
466 | reg |= APDS990X_INT_ACK_BOTH; | |
467 | break; | |
468 | } | |
469 | ||
470 | ret = i2c_smbus_read_byte_data(client, reg); | |
471 | return (int)ret; | |
472 | } | |
473 | ||
474 | static irqreturn_t apds990x_irq(int irq, void *data) | |
475 | { | |
476 | struct apds990x_chip *chip = data; | |
477 | u8 status; | |
478 | ||
479 | apds990x_read_byte(chip, APDS990X_STATUS, &status); | |
480 | apds990x_ack_int(chip, status); | |
481 | ||
482 | mutex_lock(&chip->mutex); | |
483 | if (!pm_runtime_suspended(&chip->client->dev)) { | |
484 | if (status & APDS990X_ST_AINT) { | |
485 | apds990x_read_word(chip, APDS990X_CDATAL, | |
486 | &chip->lux_clear); | |
487 | apds990x_read_word(chip, APDS990X_IRDATAL, | |
488 | &chip->lux_ir); | |
489 | /* Store used gain for calculations */ | |
490 | chip->again_meas = chip->again_next; | |
491 | ||
492 | chip->lux_raw = apds990x_get_lux(chip, | |
493 | chip->lux_clear, | |
494 | chip->lux_ir); | |
495 | ||
496 | if (apds990x_calc_again(chip) == 0) { | |
497 | /* Result is valid */ | |
498 | chip->lux = chip->lux_raw; | |
499 | chip->lux_wait_fresh_res = false; | |
500 | wake_up(&chip->wait); | |
501 | sysfs_notify(&chip->client->dev.kobj, | |
502 | NULL, "lux0_input"); | |
503 | } | |
504 | } | |
505 | ||
506 | if ((status & APDS990X_ST_PINT) && chip->prox_en) { | |
507 | u16 clr_ch; | |
508 | ||
509 | apds990x_read_word(chip, APDS990X_CDATAL, &clr_ch); | |
510 | /* | |
511 | * If ALS channel is saturated at min gain, | |
512 | * proximity gives false posivite values. | |
513 | * Just ignore them. | |
514 | */ | |
515 | if (chip->again_meas == 0 && | |
516 | clr_ch == chip->a_max_result) | |
517 | chip->prox_data = 0; | |
518 | else | |
519 | apds990x_read_word(chip, | |
520 | APDS990X_PDATAL, | |
521 | &chip->prox_data); | |
522 | ||
523 | apds990x_refresh_pthres(chip, chip->prox_data); | |
524 | if (chip->prox_data < chip->prox_thres) | |
525 | chip->prox_data = 0; | |
526 | else if (!chip->prox_continuous_mode) | |
527 | chip->prox_data = APDS_PROX_RANGE; | |
528 | sysfs_notify(&chip->client->dev.kobj, | |
529 | NULL, "prox0_raw"); | |
530 | } | |
531 | } | |
532 | mutex_unlock(&chip->mutex); | |
533 | return IRQ_HANDLED; | |
534 | } | |
535 | ||
536 | static int apds990x_configure(struct apds990x_chip *chip) | |
537 | { | |
538 | /* It is recommended to use disabled mode during these operations */ | |
539 | apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL); | |
540 | ||
541 | /* conversion and wait times for different state machince states */ | |
542 | apds990x_write_byte(chip, APDS990X_PTIME, APDS990X_PTIME_DEFAULT); | |
543 | apds990x_write_byte(chip, APDS990X_WTIME, APDS990X_WTIME_DEFAULT); | |
544 | apds990x_set_atime(chip, APDS_LUX_AVERAGING_TIME); | |
545 | ||
546 | apds990x_write_byte(chip, APDS990X_CONFIG, 0); | |
547 | ||
548 | /* Persistence levels */ | |
549 | apds990x_write_byte(chip, APDS990X_PERS, | |
550 | (chip->lux_persistence << APDS990X_APERS_SHIFT) | | |
551 | (chip->prox_persistence << APDS990X_PPERS_SHIFT)); | |
552 | ||
553 | apds990x_write_byte(chip, APDS990X_PPCOUNT, chip->pdata->ppcount); | |
554 | ||
555 | /* Start with relatively small gain */ | |
556 | chip->again_meas = 1; | |
557 | chip->again_next = 1; | |
558 | apds990x_write_byte(chip, APDS990X_CONTROL, | |
559 | (chip->pdrive << 6) | | |
560 | (chip->pdiode << 4) | | |
561 | (chip->pgain << 2) | | |
562 | (chip->again_next << 0)); | |
563 | return 0; | |
564 | } | |
565 | ||
566 | static int apds990x_detect(struct apds990x_chip *chip) | |
567 | { | |
568 | struct i2c_client *client = chip->client; | |
569 | int ret; | |
570 | u8 id; | |
571 | ||
572 | ret = apds990x_read_byte(chip, APDS990X_ID, &id); | |
573 | if (ret < 0) { | |
574 | dev_err(&client->dev, "ID read failed\n"); | |
575 | return ret; | |
576 | } | |
577 | ||
578 | ret = apds990x_read_byte(chip, APDS990X_REV, &chip->revision); | |
579 | if (ret < 0) { | |
580 | dev_err(&client->dev, "REV read failed\n"); | |
581 | return ret; | |
582 | } | |
583 | ||
584 | switch (id) { | |
585 | case APDS990X_ID_0: | |
586 | case APDS990X_ID_4: | |
587 | case APDS990X_ID_29: | |
588 | snprintf(chip->chipname, sizeof(chip->chipname), "APDS-990x"); | |
589 | break; | |
590 | default: | |
591 | ret = -ENODEV; | |
592 | break; | |
593 | } | |
594 | return ret; | |
595 | } | |
596 | ||
bbd6d050 | 597 | #ifdef CONFIG_PM |
92b1f84d SO |
598 | static int apds990x_chip_on(struct apds990x_chip *chip) |
599 | { | |
600 | int err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), | |
601 | chip->regs); | |
602 | if (err < 0) | |
603 | return err; | |
604 | ||
605 | usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY); | |
606 | ||
607 | /* Refresh all configs in case of regulators were off */ | |
608 | chip->prox_data = 0; | |
609 | apds990x_configure(chip); | |
610 | apds990x_mode_on(chip); | |
611 | return 0; | |
612 | } | |
ec8f9cea | 613 | #endif |
92b1f84d SO |
614 | |
615 | static int apds990x_chip_off(struct apds990x_chip *chip) | |
616 | { | |
617 | apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL); | |
618 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); | |
619 | return 0; | |
620 | } | |
621 | ||
622 | static ssize_t apds990x_lux_show(struct device *dev, | |
623 | struct device_attribute *attr, char *buf) | |
624 | { | |
625 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
626 | ssize_t ret; | |
627 | u32 result; | |
71f592d2 | 628 | long time_left; |
92b1f84d SO |
629 | |
630 | if (pm_runtime_suspended(dev)) | |
631 | return -EIO; | |
632 | ||
71f592d2 WS |
633 | time_left = wait_event_interruptible_timeout(chip->wait, |
634 | !chip->lux_wait_fresh_res, | |
635 | msecs_to_jiffies(APDS_TIMEOUT)); | |
636 | if (!time_left) | |
92b1f84d SO |
637 | return -EIO; |
638 | ||
639 | mutex_lock(&chip->mutex); | |
640 | result = (chip->lux * chip->lux_calib) / APDS_CALIB_SCALER; | |
641 | if (result > (APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE)) | |
642 | result = APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE; | |
643 | ||
644 | ret = sprintf(buf, "%d.%d\n", | |
645 | result / APDS990X_LUX_OUTPUT_SCALE, | |
646 | result % APDS990X_LUX_OUTPUT_SCALE); | |
647 | mutex_unlock(&chip->mutex); | |
648 | return ret; | |
649 | } | |
650 | ||
651 | static DEVICE_ATTR(lux0_input, S_IRUGO, apds990x_lux_show, NULL); | |
652 | ||
653 | static ssize_t apds990x_lux_range_show(struct device *dev, | |
654 | struct device_attribute *attr, char *buf) | |
655 | { | |
656 | return sprintf(buf, "%u\n", APDS_RANGE); | |
657 | } | |
658 | ||
659 | static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, apds990x_lux_range_show, NULL); | |
660 | ||
661 | static ssize_t apds990x_lux_calib_format_show(struct device *dev, | |
662 | struct device_attribute *attr, char *buf) | |
663 | { | |
664 | return sprintf(buf, "%u\n", APDS_CALIB_SCALER); | |
665 | } | |
666 | ||
667 | static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, | |
668 | apds990x_lux_calib_format_show, NULL); | |
669 | ||
670 | static ssize_t apds990x_lux_calib_show(struct device *dev, | |
671 | struct device_attribute *attr, char *buf) | |
672 | { | |
673 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
674 | ||
675 | return sprintf(buf, "%u\n", chip->lux_calib); | |
676 | } | |
677 | ||
678 | static ssize_t apds990x_lux_calib_store(struct device *dev, | |
679 | struct device_attribute *attr, | |
680 | const char *buf, size_t len) | |
681 | { | |
682 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
683 | unsigned long value; | |
f7b41276 | 684 | int ret; |
92b1f84d | 685 | |
f7b41276 JH |
686 | ret = kstrtoul(buf, 0, &value); |
687 | if (ret) | |
688 | return ret; | |
92b1f84d | 689 | |
92b1f84d SO |
690 | chip->lux_calib = value; |
691 | ||
692 | return len; | |
693 | } | |
694 | ||
695 | static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, apds990x_lux_calib_show, | |
696 | apds990x_lux_calib_store); | |
697 | ||
698 | static ssize_t apds990x_rate_avail(struct device *dev, | |
699 | struct device_attribute *attr, char *buf) | |
700 | { | |
701 | int i; | |
702 | int pos = 0; | |
ef7e69fc | 703 | |
92b1f84d SO |
704 | for (i = 0; i < ARRAY_SIZE(arates_hz); i++) |
705 | pos += sprintf(buf + pos, "%d ", arates_hz[i]); | |
706 | sprintf(buf + pos - 1, "\n"); | |
707 | return pos; | |
708 | } | |
709 | ||
710 | static ssize_t apds990x_rate_show(struct device *dev, | |
711 | struct device_attribute *attr, char *buf) | |
712 | { | |
713 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 714 | |
92b1f84d SO |
715 | return sprintf(buf, "%d\n", chip->arate); |
716 | } | |
717 | ||
718 | static int apds990x_set_arate(struct apds990x_chip *chip, int rate) | |
719 | { | |
720 | int i; | |
721 | ||
722 | for (i = 0; i < ARRAY_SIZE(arates_hz); i++) | |
723 | if (rate >= arates_hz[i]) | |
724 | break; | |
725 | ||
726 | if (i == ARRAY_SIZE(arates_hz)) | |
727 | return -EINVAL; | |
728 | ||
729 | /* Pick up corresponding persistence value */ | |
730 | chip->lux_persistence = apersis[i]; | |
731 | chip->arate = arates_hz[i]; | |
732 | ||
733 | /* If the chip is not in use, don't try to access it */ | |
734 | if (pm_runtime_suspended(&chip->client->dev)) | |
735 | return 0; | |
736 | ||
737 | /* Persistence levels */ | |
738 | return apds990x_write_byte(chip, APDS990X_PERS, | |
739 | (chip->lux_persistence << APDS990X_APERS_SHIFT) | | |
740 | (chip->prox_persistence << APDS990X_PPERS_SHIFT)); | |
741 | } | |
742 | ||
743 | static ssize_t apds990x_rate_store(struct device *dev, | |
744 | struct device_attribute *attr, | |
745 | const char *buf, size_t len) | |
746 | { | |
747 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
748 | unsigned long value; | |
749 | int ret; | |
750 | ||
f7b41276 JH |
751 | ret = kstrtoul(buf, 0, &value); |
752 | if (ret) | |
753 | return ret; | |
92b1f84d SO |
754 | |
755 | mutex_lock(&chip->mutex); | |
756 | ret = apds990x_set_arate(chip, value); | |
757 | mutex_unlock(&chip->mutex); | |
758 | ||
759 | if (ret < 0) | |
760 | return ret; | |
761 | return len; | |
762 | } | |
763 | ||
764 | static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, apds990x_rate_avail, NULL); | |
765 | ||
766 | static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, apds990x_rate_show, | |
767 | apds990x_rate_store); | |
768 | ||
769 | static ssize_t apds990x_prox_show(struct device *dev, | |
770 | struct device_attribute *attr, char *buf) | |
771 | { | |
772 | ssize_t ret; | |
773 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 774 | |
92b1f84d SO |
775 | if (pm_runtime_suspended(dev) || !chip->prox_en) |
776 | return -EIO; | |
777 | ||
778 | mutex_lock(&chip->mutex); | |
779 | ret = sprintf(buf, "%d\n", chip->prox_data); | |
780 | mutex_unlock(&chip->mutex); | |
781 | return ret; | |
782 | } | |
783 | ||
784 | static DEVICE_ATTR(prox0_raw, S_IRUGO, apds990x_prox_show, NULL); | |
785 | ||
786 | static ssize_t apds990x_prox_range_show(struct device *dev, | |
787 | struct device_attribute *attr, char *buf) | |
788 | { | |
789 | return sprintf(buf, "%u\n", APDS_PROX_RANGE); | |
790 | } | |
791 | ||
792 | static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, apds990x_prox_range_show, NULL); | |
793 | ||
794 | static ssize_t apds990x_prox_enable_show(struct device *dev, | |
795 | struct device_attribute *attr, char *buf) | |
796 | { | |
797 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 798 | |
92b1f84d SO |
799 | return sprintf(buf, "%d\n", chip->prox_en); |
800 | } | |
801 | ||
802 | static ssize_t apds990x_prox_enable_store(struct device *dev, | |
803 | struct device_attribute *attr, | |
804 | const char *buf, size_t len) | |
805 | { | |
806 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
807 | unsigned long value; | |
f7b41276 | 808 | int ret; |
92b1f84d | 809 | |
f7b41276 JH |
810 | ret = kstrtoul(buf, 0, &value); |
811 | if (ret) | |
812 | return ret; | |
92b1f84d SO |
813 | |
814 | mutex_lock(&chip->mutex); | |
815 | ||
816 | if (!chip->prox_en) | |
817 | chip->prox_data = 0; | |
818 | ||
819 | if (value) | |
820 | chip->prox_en++; | |
821 | else if (chip->prox_en > 0) | |
822 | chip->prox_en--; | |
823 | ||
824 | if (!pm_runtime_suspended(dev)) | |
825 | apds990x_mode_on(chip); | |
826 | mutex_unlock(&chip->mutex); | |
827 | return len; | |
828 | } | |
829 | ||
830 | static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, apds990x_prox_enable_show, | |
831 | apds990x_prox_enable_store); | |
832 | ||
cbbdc608 | 833 | static const char *reporting_modes[] = {"trigger", "periodic"}; |
92b1f84d SO |
834 | |
835 | static ssize_t apds990x_prox_reporting_mode_show(struct device *dev, | |
836 | struct device_attribute *attr, char *buf) | |
837 | { | |
838 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 839 | |
92b1f84d SO |
840 | return sprintf(buf, "%s\n", |
841 | reporting_modes[!!chip->prox_continuous_mode]); | |
842 | } | |
843 | ||
844 | static ssize_t apds990x_prox_reporting_mode_store(struct device *dev, | |
845 | struct device_attribute *attr, | |
846 | const char *buf, size_t len) | |
847 | { | |
848 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
cbbdc608 | 849 | int ret; |
92b1f84d | 850 | |
cbbdc608 AS |
851 | ret = sysfs_match_string(reporting_modes, buf); |
852 | if (ret < 0) | |
853 | return ret; | |
854 | ||
855 | chip->prox_continuous_mode = ret; | |
92b1f84d SO |
856 | return len; |
857 | } | |
858 | ||
859 | static DEVICE_ATTR(prox0_reporting_mode, S_IRUGO | S_IWUSR, | |
860 | apds990x_prox_reporting_mode_show, | |
861 | apds990x_prox_reporting_mode_store); | |
862 | ||
863 | static ssize_t apds990x_prox_reporting_avail_show(struct device *dev, | |
864 | struct device_attribute *attr, char *buf) | |
865 | { | |
866 | return sprintf(buf, "%s %s\n", reporting_modes[0], reporting_modes[1]); | |
867 | } | |
868 | ||
869 | static DEVICE_ATTR(prox0_reporting_mode_avail, S_IRUGO | S_IWUSR, | |
870 | apds990x_prox_reporting_avail_show, NULL); | |
871 | ||
872 | ||
873 | static ssize_t apds990x_lux_thresh_above_show(struct device *dev, | |
874 | struct device_attribute *attr, char *buf) | |
875 | { | |
876 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 877 | |
92b1f84d SO |
878 | return sprintf(buf, "%d\n", chip->lux_thres_hi); |
879 | } | |
880 | ||
881 | static ssize_t apds990x_lux_thresh_below_show(struct device *dev, | |
882 | struct device_attribute *attr, char *buf) | |
883 | { | |
884 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 885 | |
92b1f84d SO |
886 | return sprintf(buf, "%d\n", chip->lux_thres_lo); |
887 | } | |
888 | ||
889 | static ssize_t apds990x_set_lux_thresh(struct apds990x_chip *chip, u32 *target, | |
890 | const char *buf) | |
891 | { | |
92b1f84d | 892 | unsigned long thresh; |
f7b41276 | 893 | int ret; |
92b1f84d | 894 | |
f7b41276 JH |
895 | ret = kstrtoul(buf, 0, &thresh); |
896 | if (ret) | |
897 | return ret; | |
92b1f84d SO |
898 | |
899 | if (thresh > APDS_RANGE) | |
900 | return -EINVAL; | |
901 | ||
902 | mutex_lock(&chip->mutex); | |
903 | *target = thresh; | |
904 | /* | |
905 | * Don't update values in HW if we are still waiting for | |
906 | * first interrupt to come after device handle open call. | |
907 | */ | |
908 | if (!chip->lux_wait_fresh_res) | |
909 | apds990x_refresh_athres(chip); | |
910 | mutex_unlock(&chip->mutex); | |
911 | return ret; | |
912 | ||
913 | } | |
914 | ||
915 | static ssize_t apds990x_lux_thresh_above_store(struct device *dev, | |
916 | struct device_attribute *attr, | |
917 | const char *buf, size_t len) | |
918 | { | |
919 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
920 | int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_hi, buf); | |
ef7e69fc | 921 | |
92b1f84d SO |
922 | if (ret < 0) |
923 | return ret; | |
924 | return len; | |
925 | } | |
926 | ||
927 | static ssize_t apds990x_lux_thresh_below_store(struct device *dev, | |
928 | struct device_attribute *attr, | |
929 | const char *buf, size_t len) | |
930 | { | |
931 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
932 | int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_lo, buf); | |
ef7e69fc | 933 | |
92b1f84d SO |
934 | if (ret < 0) |
935 | return ret; | |
936 | return len; | |
937 | } | |
938 | ||
939 | static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, | |
940 | apds990x_lux_thresh_above_show, | |
941 | apds990x_lux_thresh_above_store); | |
942 | ||
943 | static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, | |
944 | apds990x_lux_thresh_below_show, | |
945 | apds990x_lux_thresh_below_store); | |
946 | ||
947 | static ssize_t apds990x_prox_threshold_show(struct device *dev, | |
948 | struct device_attribute *attr, char *buf) | |
949 | { | |
950 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 951 | |
92b1f84d SO |
952 | return sprintf(buf, "%d\n", chip->prox_thres); |
953 | } | |
954 | ||
955 | static ssize_t apds990x_prox_threshold_store(struct device *dev, | |
956 | struct device_attribute *attr, | |
957 | const char *buf, size_t len) | |
958 | { | |
959 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
960 | unsigned long value; | |
f7b41276 | 961 | int ret; |
92b1f84d | 962 | |
f7b41276 JH |
963 | ret = kstrtoul(buf, 0, &value); |
964 | if (ret) | |
965 | return ret; | |
92b1f84d SO |
966 | |
967 | if ((value > APDS_RANGE) || (value == 0) || | |
968 | (value < APDS_PROX_HYSTERESIS)) | |
969 | return -EINVAL; | |
970 | ||
971 | mutex_lock(&chip->mutex); | |
972 | chip->prox_thres = value; | |
973 | ||
974 | apds990x_force_p_refresh(chip); | |
975 | mutex_unlock(&chip->mutex); | |
976 | return len; | |
977 | } | |
978 | ||
979 | static DEVICE_ATTR(prox0_thresh_above_value, S_IRUGO | S_IWUSR, | |
980 | apds990x_prox_threshold_show, | |
981 | apds990x_prox_threshold_store); | |
982 | ||
983 | static ssize_t apds990x_power_state_show(struct device *dev, | |
984 | struct device_attribute *attr, char *buf) | |
985 | { | |
986 | return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); | |
987 | return 0; | |
988 | } | |
989 | ||
990 | static ssize_t apds990x_power_state_store(struct device *dev, | |
991 | struct device_attribute *attr, | |
992 | const char *buf, size_t len) | |
993 | { | |
994 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
995 | unsigned long value; | |
f7b41276 JH |
996 | int ret; |
997 | ||
998 | ret = kstrtoul(buf, 0, &value); | |
999 | if (ret) | |
1000 | return ret; | |
92b1f84d | 1001 | |
92b1f84d SO |
1002 | if (value) { |
1003 | pm_runtime_get_sync(dev); | |
1004 | mutex_lock(&chip->mutex); | |
1005 | chip->lux_wait_fresh_res = true; | |
1006 | apds990x_force_a_refresh(chip); | |
1007 | apds990x_force_p_refresh(chip); | |
1008 | mutex_unlock(&chip->mutex); | |
1009 | } else { | |
1010 | if (!pm_runtime_suspended(dev)) | |
1011 | pm_runtime_put(dev); | |
1012 | } | |
1013 | return len; | |
1014 | } | |
1015 | ||
1016 | static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, | |
1017 | apds990x_power_state_show, | |
1018 | apds990x_power_state_store); | |
1019 | ||
1020 | static ssize_t apds990x_chip_id_show(struct device *dev, | |
1021 | struct device_attribute *attr, char *buf) | |
1022 | { | |
1023 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
ef7e69fc | 1024 | |
92b1f84d SO |
1025 | return sprintf(buf, "%s %d\n", chip->chipname, chip->revision); |
1026 | } | |
1027 | ||
1028 | static DEVICE_ATTR(chip_id, S_IRUGO, apds990x_chip_id_show, NULL); | |
1029 | ||
1030 | static struct attribute *sysfs_attrs_ctrl[] = { | |
1031 | &dev_attr_lux0_calibscale.attr, | |
1032 | &dev_attr_lux0_calibscale_default.attr, | |
1033 | &dev_attr_lux0_input.attr, | |
1034 | &dev_attr_lux0_sensor_range.attr, | |
1035 | &dev_attr_lux0_rate.attr, | |
1036 | &dev_attr_lux0_rate_avail.attr, | |
1037 | &dev_attr_lux0_thresh_above_value.attr, | |
1038 | &dev_attr_lux0_thresh_below_value.attr, | |
1039 | &dev_attr_prox0_raw_en.attr, | |
1040 | &dev_attr_prox0_raw.attr, | |
1041 | &dev_attr_prox0_sensor_range.attr, | |
1042 | &dev_attr_prox0_thresh_above_value.attr, | |
1043 | &dev_attr_prox0_reporting_mode.attr, | |
1044 | &dev_attr_prox0_reporting_mode_avail.attr, | |
1045 | &dev_attr_chip_id.attr, | |
1046 | &dev_attr_power_state.attr, | |
1047 | NULL | |
1048 | }; | |
1049 | ||
68b9e993 | 1050 | static const struct attribute_group apds990x_attribute_group[] = { |
92b1f84d SO |
1051 | {.attrs = sysfs_attrs_ctrl }, |
1052 | }; | |
1053 | ||
6757c648 | 1054 | static int apds990x_probe(struct i2c_client *client) |
92b1f84d SO |
1055 | { |
1056 | struct apds990x_chip *chip; | |
1057 | int err; | |
1058 | ||
1059 | chip = kzalloc(sizeof *chip, GFP_KERNEL); | |
1060 | if (!chip) | |
1061 | return -ENOMEM; | |
1062 | ||
1063 | i2c_set_clientdata(client, chip); | |
1064 | chip->client = client; | |
1065 | ||
1066 | init_waitqueue_head(&chip->wait); | |
1067 | mutex_init(&chip->mutex); | |
1068 | chip->pdata = client->dev.platform_data; | |
1069 | ||
1070 | if (chip->pdata == NULL) { | |
1071 | dev_err(&client->dev, "platform data is mandatory\n"); | |
1072 | err = -EINVAL; | |
1073 | goto fail1; | |
1074 | } | |
1075 | ||
1076 | if (chip->pdata->cf.ga == 0) { | |
1077 | /* set uncovered sensor default parameters */ | |
1078 | chip->cf.ga = 1966; /* 0.48 * APDS_PARAM_SCALE */ | |
1079 | chip->cf.cf1 = 4096; /* 1.00 * APDS_PARAM_SCALE */ | |
1080 | chip->cf.irf1 = 9134; /* 2.23 * APDS_PARAM_SCALE */ | |
1081 | chip->cf.cf2 = 2867; /* 0.70 * APDS_PARAM_SCALE */ | |
1082 | chip->cf.irf2 = 5816; /* 1.42 * APDS_PARAM_SCALE */ | |
1083 | chip->cf.df = 52; | |
1084 | } else { | |
1085 | chip->cf = chip->pdata->cf; | |
1086 | } | |
1087 | ||
1088 | /* precalculate inverse chip factors for threshold control */ | |
1089 | chip->rcf.afactor = | |
1090 | (chip->cf.irf1 - chip->cf.irf2) * APDS_PARAM_SCALE / | |
1091 | (chip->cf.cf1 - chip->cf.cf2); | |
1092 | chip->rcf.cf1 = APDS_PARAM_SCALE * APDS_PARAM_SCALE / | |
1093 | chip->cf.cf1; | |
1094 | chip->rcf.irf1 = chip->cf.irf1 * APDS_PARAM_SCALE / | |
1095 | chip->cf.cf1; | |
1096 | chip->rcf.cf2 = APDS_PARAM_SCALE * APDS_PARAM_SCALE / | |
1097 | chip->cf.cf2; | |
1098 | chip->rcf.irf2 = chip->cf.irf2 * APDS_PARAM_SCALE / | |
1099 | chip->cf.cf2; | |
1100 | ||
1101 | /* Set something to start with */ | |
1102 | chip->lux_thres_hi = APDS_LUX_DEF_THRES_HI; | |
1103 | chip->lux_thres_lo = APDS_LUX_DEF_THRES_LO; | |
1104 | chip->lux_calib = APDS_LUX_NEUTRAL_CALIB_VALUE; | |
1105 | ||
1106 | chip->prox_thres = APDS_PROX_DEF_THRES; | |
1107 | chip->pdrive = chip->pdata->pdrive; | |
1108 | chip->pdiode = APDS_PDIODE_IR; | |
1109 | chip->pgain = APDS_PGAIN_1X; | |
1110 | chip->prox_calib = APDS_PROX_NEUTRAL_CALIB_VALUE; | |
1111 | chip->prox_persistence = APDS_DEFAULT_PROX_PERS; | |
1112 | chip->prox_continuous_mode = false; | |
1113 | ||
1114 | chip->regs[0].supply = reg_vcc; | |
1115 | chip->regs[1].supply = reg_vled; | |
1116 | ||
1117 | err = regulator_bulk_get(&client->dev, | |
1118 | ARRAY_SIZE(chip->regs), chip->regs); | |
1119 | if (err < 0) { | |
1120 | dev_err(&client->dev, "Cannot get regulators\n"); | |
1121 | goto fail1; | |
1122 | } | |
1123 | ||
1124 | err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), chip->regs); | |
1125 | if (err < 0) { | |
1126 | dev_err(&client->dev, "Cannot enable regulators\n"); | |
1127 | goto fail2; | |
1128 | } | |
1129 | ||
1130 | usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY); | |
1131 | ||
1132 | err = apds990x_detect(chip); | |
1133 | if (err < 0) { | |
1134 | dev_err(&client->dev, "APDS990X not found\n"); | |
1135 | goto fail3; | |
1136 | } | |
1137 | ||
1138 | pm_runtime_set_active(&client->dev); | |
1139 | ||
1140 | apds990x_configure(chip); | |
1141 | apds990x_set_arate(chip, APDS_LUX_DEFAULT_RATE); | |
1142 | apds990x_mode_on(chip); | |
1143 | ||
1144 | pm_runtime_enable(&client->dev); | |
1145 | ||
1146 | if (chip->pdata->setup_resources) { | |
1147 | err = chip->pdata->setup_resources(); | |
1148 | if (err) { | |
1149 | err = -EINVAL; | |
1150 | goto fail3; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | err = sysfs_create_group(&chip->client->dev.kobj, | |
1155 | apds990x_attribute_group); | |
1156 | if (err < 0) { | |
1157 | dev_err(&chip->client->dev, "Sysfs registration failed\n"); | |
1158 | goto fail4; | |
1159 | } | |
1160 | ||
1161 | err = request_threaded_irq(client->irq, NULL, | |
1162 | apds990x_irq, | |
1163 | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW | | |
1164 | IRQF_ONESHOT, | |
1165 | "apds990x", chip); | |
1166 | if (err) { | |
1167 | dev_err(&client->dev, "could not get IRQ %d\n", | |
1168 | client->irq); | |
1169 | goto fail5; | |
1170 | } | |
1171 | return err; | |
1172 | fail5: | |
1173 | sysfs_remove_group(&chip->client->dev.kobj, | |
1174 | &apds990x_attribute_group[0]); | |
1175 | fail4: | |
1176 | if (chip->pdata && chip->pdata->release_resources) | |
1177 | chip->pdata->release_resources(); | |
1178 | fail3: | |
1179 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); | |
1180 | fail2: | |
1181 | regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs); | |
1182 | fail1: | |
1183 | kfree(chip); | |
1184 | return err; | |
1185 | } | |
1186 | ||
ed5c2f5f | 1187 | static void apds990x_remove(struct i2c_client *client) |
92b1f84d SO |
1188 | { |
1189 | struct apds990x_chip *chip = i2c_get_clientdata(client); | |
1190 | ||
1191 | free_irq(client->irq, chip); | |
1192 | sysfs_remove_group(&chip->client->dev.kobj, | |
1193 | apds990x_attribute_group); | |
1194 | ||
1195 | if (chip->pdata && chip->pdata->release_resources) | |
1196 | chip->pdata->release_resources(); | |
1197 | ||
1198 | if (!pm_runtime_suspended(&client->dev)) | |
1199 | apds990x_chip_off(chip); | |
1200 | ||
1201 | pm_runtime_disable(&client->dev); | |
1202 | pm_runtime_set_suspended(&client->dev); | |
1203 | ||
1204 | regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs); | |
1205 | ||
1206 | kfree(chip); | |
92b1f84d SO |
1207 | } |
1208 | ||
39d79164 | 1209 | #ifdef CONFIG_PM_SLEEP |
92b1f84d SO |
1210 | static int apds990x_suspend(struct device *dev) |
1211 | { | |
8c99d8e6 | 1212 | struct i2c_client *client = to_i2c_client(dev); |
92b1f84d SO |
1213 | struct apds990x_chip *chip = i2c_get_clientdata(client); |
1214 | ||
1215 | apds990x_chip_off(chip); | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | static int apds990x_resume(struct device *dev) | |
1220 | { | |
8c99d8e6 | 1221 | struct i2c_client *client = to_i2c_client(dev); |
92b1f84d SO |
1222 | struct apds990x_chip *chip = i2c_get_clientdata(client); |
1223 | ||
1224 | /* | |
1225 | * If we were enabled at suspend time, it is expected | |
1226 | * everything works nice and smoothly. Chip_on is enough | |
1227 | */ | |
1228 | apds990x_chip_on(chip); | |
1229 | ||
1230 | return 0; | |
1231 | } | |
92b1f84d SO |
1232 | #endif |
1233 | ||
bbd6d050 | 1234 | #ifdef CONFIG_PM |
92b1f84d SO |
1235 | static int apds990x_runtime_suspend(struct device *dev) |
1236 | { | |
8c99d8e6 | 1237 | struct i2c_client *client = to_i2c_client(dev); |
92b1f84d SO |
1238 | struct apds990x_chip *chip = i2c_get_clientdata(client); |
1239 | ||
1240 | apds990x_chip_off(chip); | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | static int apds990x_runtime_resume(struct device *dev) | |
1245 | { | |
8c99d8e6 | 1246 | struct i2c_client *client = to_i2c_client(dev); |
92b1f84d SO |
1247 | struct apds990x_chip *chip = i2c_get_clientdata(client); |
1248 | ||
1249 | apds990x_chip_on(chip); | |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | #endif | |
1254 | ||
1255 | static const struct i2c_device_id apds990x_id[] = { | |
b45c696c | 1256 | { "apds990x" }, |
92b1f84d SO |
1257 | {} |
1258 | }; | |
1259 | ||
1260 | MODULE_DEVICE_TABLE(i2c, apds990x_id); | |
1261 | ||
1262 | static const struct dev_pm_ops apds990x_pm_ops = { | |
1263 | SET_SYSTEM_SLEEP_PM_OPS(apds990x_suspend, apds990x_resume) | |
1264 | SET_RUNTIME_PM_OPS(apds990x_runtime_suspend, | |
1265 | apds990x_runtime_resume, | |
1266 | NULL) | |
1267 | }; | |
1268 | ||
1269 | static struct i2c_driver apds990x_driver = { | |
f050bb8f | 1270 | .driver = { |
92b1f84d | 1271 | .name = "apds990x", |
92b1f84d SO |
1272 | .pm = &apds990x_pm_ops, |
1273 | }, | |
f050bb8f | 1274 | .probe = apds990x_probe, |
2d6bed9c | 1275 | .remove = apds990x_remove, |
92b1f84d SO |
1276 | .id_table = apds990x_id, |
1277 | }; | |
1278 | ||
a64fe2ed | 1279 | module_i2c_driver(apds990x_driver); |
92b1f84d SO |
1280 | |
1281 | MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor"); | |
1282 | MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); | |
1283 | MODULE_LICENSE("GPL v2"); |