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1 | /* |
2 | * This file is part of the APDS990x sensor driver. | |
3 | * Chip is combined proximity and ambient light sensor. | |
4 | * | |
5 | * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). | |
6 | * | |
7 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
21 | * 02110-1301 USA | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/i2c.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/mutex.h> | |
30 | #include <linux/regulator/consumer.h> | |
31 | #include <linux/pm_runtime.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/wait.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/i2c/apds990x.h> | |
36 | ||
37 | /* Register map */ | |
38 | #define APDS990X_ENABLE 0x00 /* Enable of states and interrupts */ | |
39 | #define APDS990X_ATIME 0x01 /* ALS ADC time */ | |
40 | #define APDS990X_PTIME 0x02 /* Proximity ADC time */ | |
41 | #define APDS990X_WTIME 0x03 /* Wait time */ | |
42 | #define APDS990X_AILTL 0x04 /* ALS interrupt low threshold low byte */ | |
43 | #define APDS990X_AILTH 0x05 /* ALS interrupt low threshold hi byte */ | |
44 | #define APDS990X_AIHTL 0x06 /* ALS interrupt hi threshold low byte */ | |
45 | #define APDS990X_AIHTH 0x07 /* ALS interrupt hi threshold hi byte */ | |
46 | #define APDS990X_PILTL 0x08 /* Proximity interrupt low threshold low byte */ | |
47 | #define APDS990X_PILTH 0x09 /* Proximity interrupt low threshold hi byte */ | |
48 | #define APDS990X_PIHTL 0x0a /* Proximity interrupt hi threshold low byte */ | |
49 | #define APDS990X_PIHTH 0x0b /* Proximity interrupt hi threshold hi byte */ | |
50 | #define APDS990X_PERS 0x0c /* Interrupt persistence filters */ | |
51 | #define APDS990X_CONFIG 0x0d /* Configuration */ | |
52 | #define APDS990X_PPCOUNT 0x0e /* Proximity pulse count */ | |
53 | #define APDS990X_CONTROL 0x0f /* Gain control register */ | |
54 | #define APDS990X_REV 0x11 /* Revision Number */ | |
55 | #define APDS990X_ID 0x12 /* Device ID */ | |
56 | #define APDS990X_STATUS 0x13 /* Device status */ | |
57 | #define APDS990X_CDATAL 0x14 /* Clear ADC low data register */ | |
58 | #define APDS990X_CDATAH 0x15 /* Clear ADC high data register */ | |
59 | #define APDS990X_IRDATAL 0x16 /* IR ADC low data register */ | |
60 | #define APDS990X_IRDATAH 0x17 /* IR ADC high data register */ | |
61 | #define APDS990X_PDATAL 0x18 /* Proximity ADC low data register */ | |
62 | #define APDS990X_PDATAH 0x19 /* Proximity ADC high data register */ | |
63 | ||
64 | /* Control */ | |
65 | #define APDS990X_MAX_AGAIN 3 | |
66 | ||
67 | /* Enable register */ | |
68 | #define APDS990X_EN_PIEN (0x1 << 5) | |
69 | #define APDS990X_EN_AIEN (0x1 << 4) | |
70 | #define APDS990X_EN_WEN (0x1 << 3) | |
71 | #define APDS990X_EN_PEN (0x1 << 2) | |
72 | #define APDS990X_EN_AEN (0x1 << 1) | |
73 | #define APDS990X_EN_PON (0x1 << 0) | |
74 | #define APDS990X_EN_DISABLE_ALL 0 | |
75 | ||
76 | /* Status register */ | |
77 | #define APDS990X_ST_PINT (0x1 << 5) | |
78 | #define APDS990X_ST_AINT (0x1 << 4) | |
79 | ||
80 | /* I2C access types */ | |
81 | #define APDS990x_CMD_TYPE_MASK (0x03 << 5) | |
82 | #define APDS990x_CMD_TYPE_RB (0x00 << 5) /* Repeated byte */ | |
83 | #define APDS990x_CMD_TYPE_INC (0x01 << 5) /* Auto increment */ | |
84 | #define APDS990x_CMD_TYPE_SPE (0x03 << 5) /* Special function */ | |
85 | ||
86 | #define APDS990x_ADDR_SHIFT 0 | |
87 | #define APDS990x_CMD 0x80 | |
88 | ||
89 | /* Interrupt ack commands */ | |
90 | #define APDS990X_INT_ACK_ALS 0x6 | |
91 | #define APDS990X_INT_ACK_PS 0x5 | |
92 | #define APDS990X_INT_ACK_BOTH 0x7 | |
93 | ||
94 | /* ptime */ | |
95 | #define APDS990X_PTIME_DEFAULT 0xff /* Recommended conversion time 2.7ms*/ | |
96 | ||
97 | /* wtime */ | |
98 | #define APDS990X_WTIME_DEFAULT 0xee /* ~50ms wait time */ | |
99 | ||
100 | #define APDS990X_TIME_TO_ADC 1024 /* One timetick as ADC count value */ | |
101 | ||
102 | /* Persistence */ | |
103 | #define APDS990X_APERS_SHIFT 0 | |
104 | #define APDS990X_PPERS_SHIFT 4 | |
105 | ||
106 | /* Supported ID:s */ | |
107 | #define APDS990X_ID_0 0x0 | |
108 | #define APDS990X_ID_4 0x4 | |
109 | #define APDS990X_ID_29 0x29 | |
110 | ||
111 | /* pgain and pdiode settings */ | |
112 | #define APDS_PGAIN_1X 0x0 | |
113 | #define APDS_PDIODE_IR 0x2 | |
114 | ||
115 | #define APDS990X_LUX_OUTPUT_SCALE 10 | |
116 | ||
117 | /* Reverse chip factors for threshold calculation */ | |
118 | struct reverse_factors { | |
119 | u32 afactor; | |
120 | int cf1; | |
121 | int irf1; | |
122 | int cf2; | |
123 | int irf2; | |
124 | }; | |
125 | ||
126 | struct apds990x_chip { | |
127 | struct apds990x_platform_data *pdata; | |
128 | struct i2c_client *client; | |
129 | struct mutex mutex; /* avoid parallel access */ | |
130 | struct regulator_bulk_data regs[2]; | |
131 | wait_queue_head_t wait; | |
132 | ||
133 | int prox_en; | |
134 | bool prox_continuous_mode; | |
135 | bool lux_wait_fresh_res; | |
136 | ||
137 | /* Chip parameters */ | |
138 | struct apds990x_chip_factors cf; | |
139 | struct reverse_factors rcf; | |
140 | u16 atime; /* als integration time */ | |
141 | u16 arate; /* als reporting rate */ | |
142 | u16 a_max_result; /* Max possible ADC value with current atime */ | |
143 | u8 again_meas; /* Gain used in last measurement */ | |
144 | u8 again_next; /* Next calculated gain */ | |
145 | u8 pgain; | |
146 | u8 pdiode; | |
147 | u8 pdrive; | |
148 | u8 lux_persistence; | |
149 | u8 prox_persistence; | |
150 | ||
151 | u32 lux_raw; | |
152 | u32 lux; | |
153 | u16 lux_clear; | |
154 | u16 lux_ir; | |
155 | u16 lux_calib; | |
156 | u32 lux_thres_hi; | |
157 | u32 lux_thres_lo; | |
158 | ||
159 | u32 prox_thres; | |
160 | u16 prox_data; | |
161 | u16 prox_calib; | |
162 | ||
163 | char chipname[10]; | |
164 | u8 revision; | |
165 | }; | |
166 | ||
167 | #define APDS_CALIB_SCALER 8192 | |
168 | #define APDS_LUX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER) | |
169 | #define APDS_PROX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER) | |
170 | ||
171 | #define APDS_PROX_DEF_THRES 600 | |
172 | #define APDS_PROX_HYSTERESIS 50 | |
173 | #define APDS_LUX_DEF_THRES_HI 101 | |
174 | #define APDS_LUX_DEF_THRES_LO 100 | |
175 | #define APDS_DEFAULT_PROX_PERS 1 | |
176 | ||
177 | #define APDS_TIMEOUT 2000 | |
178 | #define APDS_STARTUP_DELAY 25000 /* us */ | |
179 | #define APDS_RANGE 65535 | |
180 | #define APDS_PROX_RANGE 1023 | |
181 | #define APDS_LUX_GAIN_LO_LIMIT 100 | |
182 | #define APDS_LUX_GAIN_LO_LIMIT_STRICT 25 | |
183 | ||
184 | #define TIMESTEP 87 /* 2.7ms is about 87 / 32 */ | |
185 | #define TIME_STEP_SCALER 32 | |
186 | ||
187 | #define APDS_LUX_AVERAGING_TIME 50 /* tolerates 50/60Hz ripple */ | |
188 | #define APDS_LUX_DEFAULT_RATE 200 | |
189 | ||
190 | static const u8 again[] = {1, 8, 16, 120}; /* ALS gain steps */ | |
191 | static const u8 ir_currents[] = {100, 50, 25, 12}; /* IRled currents in mA */ | |
192 | ||
193 | /* Following two tables must match i.e 10Hz rate means 1 as persistence value */ | |
194 | static const u16 arates_hz[] = {10, 5, 2, 1}; | |
195 | static const u8 apersis[] = {1, 2, 4, 5}; | |
196 | ||
197 | /* Regulators */ | |
198 | static const char reg_vcc[] = "Vdd"; | |
199 | static const char reg_vled[] = "Vled"; | |
200 | ||
201 | static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data) | |
202 | { | |
203 | struct i2c_client *client = chip->client; | |
204 | s32 ret; | |
205 | ||
206 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
207 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB; | |
208 | ||
209 | ret = i2c_smbus_read_byte_data(client, reg); | |
210 | *data = ret; | |
211 | return (int)ret; | |
212 | } | |
213 | ||
214 | static int apds990x_read_word(struct apds990x_chip *chip, u8 reg, u16 *data) | |
215 | { | |
216 | struct i2c_client *client = chip->client; | |
217 | s32 ret; | |
218 | ||
219 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
220 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC; | |
221 | ||
222 | ret = i2c_smbus_read_word_data(client, reg); | |
223 | *data = ret; | |
224 | return (int)ret; | |
225 | } | |
226 | ||
227 | static int apds990x_write_byte(struct apds990x_chip *chip, u8 reg, u8 data) | |
228 | { | |
229 | struct i2c_client *client = chip->client; | |
230 | s32 ret; | |
231 | ||
232 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
233 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB; | |
234 | ||
235 | ret = i2c_smbus_write_byte_data(client, reg, data); | |
236 | return (int)ret; | |
237 | } | |
238 | ||
239 | static int apds990x_write_word(struct apds990x_chip *chip, u8 reg, u16 data) | |
240 | { | |
241 | struct i2c_client *client = chip->client; | |
242 | s32 ret; | |
243 | ||
244 | reg &= ~APDS990x_CMD_TYPE_MASK; | |
245 | reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC; | |
246 | ||
247 | ret = i2c_smbus_write_word_data(client, reg, data); | |
248 | return (int)ret; | |
249 | } | |
250 | ||
251 | static int apds990x_mode_on(struct apds990x_chip *chip) | |
252 | { | |
253 | /* ALS is mandatory, proximity optional */ | |
254 | u8 reg = APDS990X_EN_AIEN | APDS990X_EN_PON | APDS990X_EN_AEN | | |
255 | APDS990X_EN_WEN; | |
256 | ||
257 | if (chip->prox_en) | |
258 | reg |= APDS990X_EN_PIEN | APDS990X_EN_PEN; | |
259 | ||
260 | return apds990x_write_byte(chip, APDS990X_ENABLE, reg); | |
261 | } | |
262 | ||
263 | static u16 apds990x_lux_to_threshold(struct apds990x_chip *chip, u32 lux) | |
264 | { | |
265 | u32 thres; | |
266 | u32 cpl; | |
267 | u32 ir; | |
268 | ||
269 | if (lux == 0) | |
270 | return 0; | |
271 | else if (lux == APDS_RANGE) | |
272 | return APDS_RANGE; | |
273 | ||
274 | /* | |
275 | * Reported LUX value is a combination of the IR and CLEAR channel | |
276 | * values. However, interrupt threshold is only for clear channel. | |
277 | * This function approximates needed HW threshold value for a given | |
278 | * LUX value in the current lightning type. | |
279 | * IR level compared to visible light varies heavily depending on the | |
280 | * source of the light | |
281 | * | |
282 | * Calculate threshold value for the next measurement period. | |
283 | * Math: threshold = lux * cpl where | |
284 | * cpl = atime * again / (glass_attenuation * device_factor) | |
285 | * (count-per-lux) | |
286 | * | |
287 | * First remove calibration. Division by four is to avoid overflow | |
288 | */ | |
289 | lux = lux * (APDS_CALIB_SCALER / 4) / (chip->lux_calib / 4); | |
290 | ||
291 | /* Multiplication by 64 is to increase accuracy */ | |
292 | cpl = ((u32)chip->atime * (u32)again[chip->again_next] * | |
293 | APDS_PARAM_SCALE * 64) / (chip->cf.ga * chip->cf.df); | |
294 | ||
295 | thres = lux * cpl / 64; | |
296 | /* | |
297 | * Convert IR light from the latest result to match with | |
298 | * new gain step. This helps to adapt with the current | |
299 | * source of light. | |
300 | */ | |
301 | ir = (u32)chip->lux_ir * (u32)again[chip->again_next] / | |
302 | (u32)again[chip->again_meas]; | |
303 | ||
304 | /* | |
305 | * Compensate count with IR light impact | |
306 | * IAC1 > IAC2 (see apds990x_get_lux for formulas) | |
307 | */ | |
308 | if (chip->lux_clear * APDS_PARAM_SCALE >= | |
309 | chip->rcf.afactor * chip->lux_ir) | |
310 | thres = (chip->rcf.cf1 * thres + chip->rcf.irf1 * ir) / | |
311 | APDS_PARAM_SCALE; | |
312 | else | |
313 | thres = (chip->rcf.cf2 * thres + chip->rcf.irf2 * ir) / | |
314 | APDS_PARAM_SCALE; | |
315 | ||
316 | if (thres >= chip->a_max_result) | |
317 | thres = chip->a_max_result - 1; | |
318 | return thres; | |
319 | } | |
320 | ||
321 | static inline int apds990x_set_atime(struct apds990x_chip *chip, u32 time_ms) | |
322 | { | |
323 | u8 reg_value; | |
324 | ||
325 | chip->atime = time_ms; | |
326 | /* Formula is specified in the data sheet */ | |
327 | reg_value = 256 - ((time_ms * TIME_STEP_SCALER) / TIMESTEP); | |
328 | /* Calculate max ADC value for given integration time */ | |
329 | chip->a_max_result = (u16)(256 - reg_value) * APDS990X_TIME_TO_ADC; | |
330 | return apds990x_write_byte(chip, APDS990X_ATIME, reg_value); | |
331 | } | |
332 | ||
333 | /* Called always with mutex locked */ | |
334 | static int apds990x_refresh_pthres(struct apds990x_chip *chip, int data) | |
335 | { | |
336 | int ret, lo, hi; | |
337 | ||
338 | /* If the chip is not in use, don't try to access it */ | |
339 | if (pm_runtime_suspended(&chip->client->dev)) | |
340 | return 0; | |
341 | ||
342 | if (data < chip->prox_thres) { | |
343 | lo = 0; | |
344 | hi = chip->prox_thres; | |
345 | } else { | |
346 | lo = chip->prox_thres - APDS_PROX_HYSTERESIS; | |
347 | if (chip->prox_continuous_mode) | |
348 | hi = chip->prox_thres; | |
349 | else | |
350 | hi = APDS_RANGE; | |
351 | } | |
352 | ||
353 | ret = apds990x_write_word(chip, APDS990X_PILTL, lo); | |
354 | ret |= apds990x_write_word(chip, APDS990X_PIHTL, hi); | |
355 | return ret; | |
356 | } | |
357 | ||
358 | /* Called always with mutex locked */ | |
359 | static int apds990x_refresh_athres(struct apds990x_chip *chip) | |
360 | { | |
361 | int ret; | |
362 | /* If the chip is not in use, don't try to access it */ | |
363 | if (pm_runtime_suspended(&chip->client->dev)) | |
364 | return 0; | |
365 | ||
366 | ret = apds990x_write_word(chip, APDS990X_AILTL, | |
367 | apds990x_lux_to_threshold(chip, chip->lux_thres_lo)); | |
368 | ret |= apds990x_write_word(chip, APDS990X_AIHTL, | |
369 | apds990x_lux_to_threshold(chip, chip->lux_thres_hi)); | |
370 | ||
371 | return ret; | |
372 | } | |
373 | ||
374 | /* Called always with mutex locked */ | |
375 | static void apds990x_force_a_refresh(struct apds990x_chip *chip) | |
376 | { | |
377 | /* This will force ALS interrupt after the next measurement. */ | |
378 | apds990x_write_word(chip, APDS990X_AILTL, APDS_LUX_DEF_THRES_LO); | |
379 | apds990x_write_word(chip, APDS990X_AIHTL, APDS_LUX_DEF_THRES_HI); | |
380 | } | |
381 | ||
382 | /* Called always with mutex locked */ | |
383 | static void apds990x_force_p_refresh(struct apds990x_chip *chip) | |
384 | { | |
385 | /* This will force proximity interrupt after the next measurement. */ | |
386 | apds990x_write_word(chip, APDS990X_PILTL, APDS_PROX_DEF_THRES - 1); | |
387 | apds990x_write_word(chip, APDS990X_PIHTL, APDS_PROX_DEF_THRES); | |
388 | } | |
389 | ||
390 | /* Called always with mutex locked */ | |
391 | static int apds990x_calc_again(struct apds990x_chip *chip) | |
392 | { | |
393 | int curr_again = chip->again_meas; | |
394 | int next_again = chip->again_meas; | |
395 | int ret = 0; | |
396 | ||
397 | /* Calculate suitable als gain */ | |
398 | if (chip->lux_clear == chip->a_max_result) | |
399 | next_again -= 2; /* ALS saturated. Decrease gain by 2 steps */ | |
400 | else if (chip->lux_clear > chip->a_max_result / 2) | |
401 | next_again--; | |
402 | else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT) | |
403 | next_again += 2; /* Too dark. Increase gain by 2 steps */ | |
404 | else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT) | |
405 | next_again++; | |
406 | ||
407 | /* Limit gain to available range */ | |
408 | if (next_again < 0) | |
409 | next_again = 0; | |
410 | else if (next_again > APDS990X_MAX_AGAIN) | |
411 | next_again = APDS990X_MAX_AGAIN; | |
412 | ||
413 | /* Let's check can we trust the measured result */ | |
414 | if (chip->lux_clear == chip->a_max_result) | |
415 | /* Result can be totally garbage due to saturation */ | |
416 | ret = -ERANGE; | |
417 | else if (next_again != curr_again && | |
418 | chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT) | |
419 | /* | |
420 | * Gain is changed and measurement result is very small. | |
421 | * Result can be totally garbage due to underflow | |
422 | */ | |
423 | ret = -ERANGE; | |
424 | ||
425 | chip->again_next = next_again; | |
426 | apds990x_write_byte(chip, APDS990X_CONTROL, | |
427 | (chip->pdrive << 6) | | |
428 | (chip->pdiode << 4) | | |
429 | (chip->pgain << 2) | | |
430 | (chip->again_next << 0)); | |
431 | ||
432 | /* | |
433 | * Error means bad result -> re-measurement is needed. The forced | |
434 | * refresh uses fastest possible persistence setting to get result | |
435 | * as soon as possible. | |
436 | */ | |
437 | if (ret < 0) | |
438 | apds990x_force_a_refresh(chip); | |
439 | else | |
440 | apds990x_refresh_athres(chip); | |
441 | ||
442 | return ret; | |
443 | } | |
444 | ||
445 | /* Called always with mutex locked */ | |
446 | static int apds990x_get_lux(struct apds990x_chip *chip, int clear, int ir) | |
447 | { | |
448 | int iac, iac1, iac2; /* IR adjusted counts */ | |
449 | u32 lpc; /* Lux per count */ | |
450 | ||
451 | /* Formulas: | |
452 | * iac1 = CF1 * CLEAR_CH - IRF1 * IR_CH | |
453 | * iac2 = CF2 * CLEAR_CH - IRF2 * IR_CH | |
454 | */ | |
455 | iac1 = (chip->cf.cf1 * clear - chip->cf.irf1 * ir) / APDS_PARAM_SCALE; | |
456 | iac2 = (chip->cf.cf2 * clear - chip->cf.irf2 * ir) / APDS_PARAM_SCALE; | |
457 | ||
458 | iac = max(iac1, iac2); | |
459 | iac = max(iac, 0); | |
460 | ||
461 | lpc = APDS990X_LUX_OUTPUT_SCALE * (chip->cf.df * chip->cf.ga) / | |
462 | (u32)(again[chip->again_meas] * (u32)chip->atime); | |
463 | ||
464 | return (iac * lpc) / APDS_PARAM_SCALE; | |
465 | } | |
466 | ||
467 | static int apds990x_ack_int(struct apds990x_chip *chip, u8 mode) | |
468 | { | |
469 | struct i2c_client *client = chip->client; | |
470 | s32 ret; | |
471 | u8 reg = APDS990x_CMD | APDS990x_CMD_TYPE_SPE; | |
472 | ||
473 | switch (mode & (APDS990X_ST_AINT | APDS990X_ST_PINT)) { | |
474 | case APDS990X_ST_AINT: | |
475 | reg |= APDS990X_INT_ACK_ALS; | |
476 | break; | |
477 | case APDS990X_ST_PINT: | |
478 | reg |= APDS990X_INT_ACK_PS; | |
479 | break; | |
480 | default: | |
481 | reg |= APDS990X_INT_ACK_BOTH; | |
482 | break; | |
483 | } | |
484 | ||
485 | ret = i2c_smbus_read_byte_data(client, reg); | |
486 | return (int)ret; | |
487 | } | |
488 | ||
489 | static irqreturn_t apds990x_irq(int irq, void *data) | |
490 | { | |
491 | struct apds990x_chip *chip = data; | |
492 | u8 status; | |
493 | ||
494 | apds990x_read_byte(chip, APDS990X_STATUS, &status); | |
495 | apds990x_ack_int(chip, status); | |
496 | ||
497 | mutex_lock(&chip->mutex); | |
498 | if (!pm_runtime_suspended(&chip->client->dev)) { | |
499 | if (status & APDS990X_ST_AINT) { | |
500 | apds990x_read_word(chip, APDS990X_CDATAL, | |
501 | &chip->lux_clear); | |
502 | apds990x_read_word(chip, APDS990X_IRDATAL, | |
503 | &chip->lux_ir); | |
504 | /* Store used gain for calculations */ | |
505 | chip->again_meas = chip->again_next; | |
506 | ||
507 | chip->lux_raw = apds990x_get_lux(chip, | |
508 | chip->lux_clear, | |
509 | chip->lux_ir); | |
510 | ||
511 | if (apds990x_calc_again(chip) == 0) { | |
512 | /* Result is valid */ | |
513 | chip->lux = chip->lux_raw; | |
514 | chip->lux_wait_fresh_res = false; | |
515 | wake_up(&chip->wait); | |
516 | sysfs_notify(&chip->client->dev.kobj, | |
517 | NULL, "lux0_input"); | |
518 | } | |
519 | } | |
520 | ||
521 | if ((status & APDS990X_ST_PINT) && chip->prox_en) { | |
522 | u16 clr_ch; | |
523 | ||
524 | apds990x_read_word(chip, APDS990X_CDATAL, &clr_ch); | |
525 | /* | |
526 | * If ALS channel is saturated at min gain, | |
527 | * proximity gives false posivite values. | |
528 | * Just ignore them. | |
529 | */ | |
530 | if (chip->again_meas == 0 && | |
531 | clr_ch == chip->a_max_result) | |
532 | chip->prox_data = 0; | |
533 | else | |
534 | apds990x_read_word(chip, | |
535 | APDS990X_PDATAL, | |
536 | &chip->prox_data); | |
537 | ||
538 | apds990x_refresh_pthres(chip, chip->prox_data); | |
539 | if (chip->prox_data < chip->prox_thres) | |
540 | chip->prox_data = 0; | |
541 | else if (!chip->prox_continuous_mode) | |
542 | chip->prox_data = APDS_PROX_RANGE; | |
543 | sysfs_notify(&chip->client->dev.kobj, | |
544 | NULL, "prox0_raw"); | |
545 | } | |
546 | } | |
547 | mutex_unlock(&chip->mutex); | |
548 | return IRQ_HANDLED; | |
549 | } | |
550 | ||
551 | static int apds990x_configure(struct apds990x_chip *chip) | |
552 | { | |
553 | /* It is recommended to use disabled mode during these operations */ | |
554 | apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL); | |
555 | ||
556 | /* conversion and wait times for different state machince states */ | |
557 | apds990x_write_byte(chip, APDS990X_PTIME, APDS990X_PTIME_DEFAULT); | |
558 | apds990x_write_byte(chip, APDS990X_WTIME, APDS990X_WTIME_DEFAULT); | |
559 | apds990x_set_atime(chip, APDS_LUX_AVERAGING_TIME); | |
560 | ||
561 | apds990x_write_byte(chip, APDS990X_CONFIG, 0); | |
562 | ||
563 | /* Persistence levels */ | |
564 | apds990x_write_byte(chip, APDS990X_PERS, | |
565 | (chip->lux_persistence << APDS990X_APERS_SHIFT) | | |
566 | (chip->prox_persistence << APDS990X_PPERS_SHIFT)); | |
567 | ||
568 | apds990x_write_byte(chip, APDS990X_PPCOUNT, chip->pdata->ppcount); | |
569 | ||
570 | /* Start with relatively small gain */ | |
571 | chip->again_meas = 1; | |
572 | chip->again_next = 1; | |
573 | apds990x_write_byte(chip, APDS990X_CONTROL, | |
574 | (chip->pdrive << 6) | | |
575 | (chip->pdiode << 4) | | |
576 | (chip->pgain << 2) | | |
577 | (chip->again_next << 0)); | |
578 | return 0; | |
579 | } | |
580 | ||
581 | static int apds990x_detect(struct apds990x_chip *chip) | |
582 | { | |
583 | struct i2c_client *client = chip->client; | |
584 | int ret; | |
585 | u8 id; | |
586 | ||
587 | ret = apds990x_read_byte(chip, APDS990X_ID, &id); | |
588 | if (ret < 0) { | |
589 | dev_err(&client->dev, "ID read failed\n"); | |
590 | return ret; | |
591 | } | |
592 | ||
593 | ret = apds990x_read_byte(chip, APDS990X_REV, &chip->revision); | |
594 | if (ret < 0) { | |
595 | dev_err(&client->dev, "REV read failed\n"); | |
596 | return ret; | |
597 | } | |
598 | ||
599 | switch (id) { | |
600 | case APDS990X_ID_0: | |
601 | case APDS990X_ID_4: | |
602 | case APDS990X_ID_29: | |
603 | snprintf(chip->chipname, sizeof(chip->chipname), "APDS-990x"); | |
604 | break; | |
605 | default: | |
606 | ret = -ENODEV; | |
607 | break; | |
608 | } | |
609 | return ret; | |
610 | } | |
611 | ||
ec8f9cea | 612 | #if defined(CONFIG_PM) || defined(CONFIG_PM_RUNTIME) |
92b1f84d SO |
613 | static int apds990x_chip_on(struct apds990x_chip *chip) |
614 | { | |
615 | int err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), | |
616 | chip->regs); | |
617 | if (err < 0) | |
618 | return err; | |
619 | ||
620 | usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY); | |
621 | ||
622 | /* Refresh all configs in case of regulators were off */ | |
623 | chip->prox_data = 0; | |
624 | apds990x_configure(chip); | |
625 | apds990x_mode_on(chip); | |
626 | return 0; | |
627 | } | |
ec8f9cea | 628 | #endif |
92b1f84d SO |
629 | |
630 | static int apds990x_chip_off(struct apds990x_chip *chip) | |
631 | { | |
632 | apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL); | |
633 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static ssize_t apds990x_lux_show(struct device *dev, | |
638 | struct device_attribute *attr, char *buf) | |
639 | { | |
640 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
641 | ssize_t ret; | |
642 | u32 result; | |
643 | long timeout; | |
644 | ||
645 | if (pm_runtime_suspended(dev)) | |
646 | return -EIO; | |
647 | ||
648 | timeout = wait_event_interruptible_timeout(chip->wait, | |
649 | !chip->lux_wait_fresh_res, | |
650 | msecs_to_jiffies(APDS_TIMEOUT)); | |
651 | if (!timeout) | |
652 | return -EIO; | |
653 | ||
654 | mutex_lock(&chip->mutex); | |
655 | result = (chip->lux * chip->lux_calib) / APDS_CALIB_SCALER; | |
656 | if (result > (APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE)) | |
657 | result = APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE; | |
658 | ||
659 | ret = sprintf(buf, "%d.%d\n", | |
660 | result / APDS990X_LUX_OUTPUT_SCALE, | |
661 | result % APDS990X_LUX_OUTPUT_SCALE); | |
662 | mutex_unlock(&chip->mutex); | |
663 | return ret; | |
664 | } | |
665 | ||
666 | static DEVICE_ATTR(lux0_input, S_IRUGO, apds990x_lux_show, NULL); | |
667 | ||
668 | static ssize_t apds990x_lux_range_show(struct device *dev, | |
669 | struct device_attribute *attr, char *buf) | |
670 | { | |
671 | return sprintf(buf, "%u\n", APDS_RANGE); | |
672 | } | |
673 | ||
674 | static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, apds990x_lux_range_show, NULL); | |
675 | ||
676 | static ssize_t apds990x_lux_calib_format_show(struct device *dev, | |
677 | struct device_attribute *attr, char *buf) | |
678 | { | |
679 | return sprintf(buf, "%u\n", APDS_CALIB_SCALER); | |
680 | } | |
681 | ||
682 | static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, | |
683 | apds990x_lux_calib_format_show, NULL); | |
684 | ||
685 | static ssize_t apds990x_lux_calib_show(struct device *dev, | |
686 | struct device_attribute *attr, char *buf) | |
687 | { | |
688 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
689 | ||
690 | return sprintf(buf, "%u\n", chip->lux_calib); | |
691 | } | |
692 | ||
693 | static ssize_t apds990x_lux_calib_store(struct device *dev, | |
694 | struct device_attribute *attr, | |
695 | const char *buf, size_t len) | |
696 | { | |
697 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
698 | unsigned long value; | |
699 | ||
700 | if (strict_strtoul(buf, 0, &value)) | |
701 | return -EINVAL; | |
702 | ||
703 | if (chip->lux_calib > APDS_RANGE) | |
704 | return -EINVAL; | |
705 | ||
706 | chip->lux_calib = value; | |
707 | ||
708 | return len; | |
709 | } | |
710 | ||
711 | static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, apds990x_lux_calib_show, | |
712 | apds990x_lux_calib_store); | |
713 | ||
714 | static ssize_t apds990x_rate_avail(struct device *dev, | |
715 | struct device_attribute *attr, char *buf) | |
716 | { | |
717 | int i; | |
718 | int pos = 0; | |
719 | for (i = 0; i < ARRAY_SIZE(arates_hz); i++) | |
720 | pos += sprintf(buf + pos, "%d ", arates_hz[i]); | |
721 | sprintf(buf + pos - 1, "\n"); | |
722 | return pos; | |
723 | } | |
724 | ||
725 | static ssize_t apds990x_rate_show(struct device *dev, | |
726 | struct device_attribute *attr, char *buf) | |
727 | { | |
728 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
729 | return sprintf(buf, "%d\n", chip->arate); | |
730 | } | |
731 | ||
732 | static int apds990x_set_arate(struct apds990x_chip *chip, int rate) | |
733 | { | |
734 | int i; | |
735 | ||
736 | for (i = 0; i < ARRAY_SIZE(arates_hz); i++) | |
737 | if (rate >= arates_hz[i]) | |
738 | break; | |
739 | ||
740 | if (i == ARRAY_SIZE(arates_hz)) | |
741 | return -EINVAL; | |
742 | ||
743 | /* Pick up corresponding persistence value */ | |
744 | chip->lux_persistence = apersis[i]; | |
745 | chip->arate = arates_hz[i]; | |
746 | ||
747 | /* If the chip is not in use, don't try to access it */ | |
748 | if (pm_runtime_suspended(&chip->client->dev)) | |
749 | return 0; | |
750 | ||
751 | /* Persistence levels */ | |
752 | return apds990x_write_byte(chip, APDS990X_PERS, | |
753 | (chip->lux_persistence << APDS990X_APERS_SHIFT) | | |
754 | (chip->prox_persistence << APDS990X_PPERS_SHIFT)); | |
755 | } | |
756 | ||
757 | static ssize_t apds990x_rate_store(struct device *dev, | |
758 | struct device_attribute *attr, | |
759 | const char *buf, size_t len) | |
760 | { | |
761 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
762 | unsigned long value; | |
763 | int ret; | |
764 | ||
765 | if (strict_strtoul(buf, 0, &value)) | |
766 | return -EINVAL; | |
767 | ||
768 | mutex_lock(&chip->mutex); | |
769 | ret = apds990x_set_arate(chip, value); | |
770 | mutex_unlock(&chip->mutex); | |
771 | ||
772 | if (ret < 0) | |
773 | return ret; | |
774 | return len; | |
775 | } | |
776 | ||
777 | static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, apds990x_rate_avail, NULL); | |
778 | ||
779 | static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, apds990x_rate_show, | |
780 | apds990x_rate_store); | |
781 | ||
782 | static ssize_t apds990x_prox_show(struct device *dev, | |
783 | struct device_attribute *attr, char *buf) | |
784 | { | |
785 | ssize_t ret; | |
786 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
787 | if (pm_runtime_suspended(dev) || !chip->prox_en) | |
788 | return -EIO; | |
789 | ||
790 | mutex_lock(&chip->mutex); | |
791 | ret = sprintf(buf, "%d\n", chip->prox_data); | |
792 | mutex_unlock(&chip->mutex); | |
793 | return ret; | |
794 | } | |
795 | ||
796 | static DEVICE_ATTR(prox0_raw, S_IRUGO, apds990x_prox_show, NULL); | |
797 | ||
798 | static ssize_t apds990x_prox_range_show(struct device *dev, | |
799 | struct device_attribute *attr, char *buf) | |
800 | { | |
801 | return sprintf(buf, "%u\n", APDS_PROX_RANGE); | |
802 | } | |
803 | ||
804 | static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, apds990x_prox_range_show, NULL); | |
805 | ||
806 | static ssize_t apds990x_prox_enable_show(struct device *dev, | |
807 | struct device_attribute *attr, char *buf) | |
808 | { | |
809 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
810 | return sprintf(buf, "%d\n", chip->prox_en); | |
811 | } | |
812 | ||
813 | static ssize_t apds990x_prox_enable_store(struct device *dev, | |
814 | struct device_attribute *attr, | |
815 | const char *buf, size_t len) | |
816 | { | |
817 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
818 | unsigned long value; | |
819 | ||
820 | if (strict_strtoul(buf, 0, &value)) | |
821 | return -EINVAL; | |
822 | ||
823 | mutex_lock(&chip->mutex); | |
824 | ||
825 | if (!chip->prox_en) | |
826 | chip->prox_data = 0; | |
827 | ||
828 | if (value) | |
829 | chip->prox_en++; | |
830 | else if (chip->prox_en > 0) | |
831 | chip->prox_en--; | |
832 | ||
833 | if (!pm_runtime_suspended(dev)) | |
834 | apds990x_mode_on(chip); | |
835 | mutex_unlock(&chip->mutex); | |
836 | return len; | |
837 | } | |
838 | ||
839 | static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, apds990x_prox_enable_show, | |
840 | apds990x_prox_enable_store); | |
841 | ||
842 | static const char reporting_modes[][9] = {"trigger", "periodic"}; | |
843 | ||
844 | static ssize_t apds990x_prox_reporting_mode_show(struct device *dev, | |
845 | struct device_attribute *attr, char *buf) | |
846 | { | |
847 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
848 | return sprintf(buf, "%s\n", | |
849 | reporting_modes[!!chip->prox_continuous_mode]); | |
850 | } | |
851 | ||
852 | static ssize_t apds990x_prox_reporting_mode_store(struct device *dev, | |
853 | struct device_attribute *attr, | |
854 | const char *buf, size_t len) | |
855 | { | |
856 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
857 | ||
858 | if (sysfs_streq(buf, reporting_modes[0])) | |
859 | chip->prox_continuous_mode = 0; | |
860 | else if (sysfs_streq(buf, reporting_modes[1])) | |
861 | chip->prox_continuous_mode = 1; | |
862 | else | |
863 | return -EINVAL; | |
864 | return len; | |
865 | } | |
866 | ||
867 | static DEVICE_ATTR(prox0_reporting_mode, S_IRUGO | S_IWUSR, | |
868 | apds990x_prox_reporting_mode_show, | |
869 | apds990x_prox_reporting_mode_store); | |
870 | ||
871 | static ssize_t apds990x_prox_reporting_avail_show(struct device *dev, | |
872 | struct device_attribute *attr, char *buf) | |
873 | { | |
874 | return sprintf(buf, "%s %s\n", reporting_modes[0], reporting_modes[1]); | |
875 | } | |
876 | ||
877 | static DEVICE_ATTR(prox0_reporting_mode_avail, S_IRUGO | S_IWUSR, | |
878 | apds990x_prox_reporting_avail_show, NULL); | |
879 | ||
880 | ||
881 | static ssize_t apds990x_lux_thresh_above_show(struct device *dev, | |
882 | struct device_attribute *attr, char *buf) | |
883 | { | |
884 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
885 | return sprintf(buf, "%d\n", chip->lux_thres_hi); | |
886 | } | |
887 | ||
888 | static ssize_t apds990x_lux_thresh_below_show(struct device *dev, | |
889 | struct device_attribute *attr, char *buf) | |
890 | { | |
891 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
892 | return sprintf(buf, "%d\n", chip->lux_thres_lo); | |
893 | } | |
894 | ||
895 | static ssize_t apds990x_set_lux_thresh(struct apds990x_chip *chip, u32 *target, | |
896 | const char *buf) | |
897 | { | |
898 | int ret = 0; | |
899 | unsigned long thresh; | |
900 | ||
901 | if (strict_strtoul(buf, 0, &thresh)) | |
902 | return -EINVAL; | |
903 | ||
904 | if (thresh > APDS_RANGE) | |
905 | return -EINVAL; | |
906 | ||
907 | mutex_lock(&chip->mutex); | |
908 | *target = thresh; | |
909 | /* | |
910 | * Don't update values in HW if we are still waiting for | |
911 | * first interrupt to come after device handle open call. | |
912 | */ | |
913 | if (!chip->lux_wait_fresh_res) | |
914 | apds990x_refresh_athres(chip); | |
915 | mutex_unlock(&chip->mutex); | |
916 | return ret; | |
917 | ||
918 | } | |
919 | ||
920 | static ssize_t apds990x_lux_thresh_above_store(struct device *dev, | |
921 | struct device_attribute *attr, | |
922 | const char *buf, size_t len) | |
923 | { | |
924 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
925 | int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_hi, buf); | |
926 | if (ret < 0) | |
927 | return ret; | |
928 | return len; | |
929 | } | |
930 | ||
931 | static ssize_t apds990x_lux_thresh_below_store(struct device *dev, | |
932 | struct device_attribute *attr, | |
933 | const char *buf, size_t len) | |
934 | { | |
935 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
936 | int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_lo, buf); | |
937 | if (ret < 0) | |
938 | return ret; | |
939 | return len; | |
940 | } | |
941 | ||
942 | static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, | |
943 | apds990x_lux_thresh_above_show, | |
944 | apds990x_lux_thresh_above_store); | |
945 | ||
946 | static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, | |
947 | apds990x_lux_thresh_below_show, | |
948 | apds990x_lux_thresh_below_store); | |
949 | ||
950 | static ssize_t apds990x_prox_threshold_show(struct device *dev, | |
951 | struct device_attribute *attr, char *buf) | |
952 | { | |
953 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
954 | return sprintf(buf, "%d\n", chip->prox_thres); | |
955 | } | |
956 | ||
957 | static ssize_t apds990x_prox_threshold_store(struct device *dev, | |
958 | struct device_attribute *attr, | |
959 | const char *buf, size_t len) | |
960 | { | |
961 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
962 | unsigned long value; | |
963 | ||
964 | if (strict_strtoul(buf, 0, &value)) | |
965 | return -EINVAL; | |
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; | |
996 | ||
997 | if (strict_strtoul(buf, 0, &value)) | |
998 | return -EINVAL; | |
999 | if (value) { | |
1000 | pm_runtime_get_sync(dev); | |
1001 | mutex_lock(&chip->mutex); | |
1002 | chip->lux_wait_fresh_res = true; | |
1003 | apds990x_force_a_refresh(chip); | |
1004 | apds990x_force_p_refresh(chip); | |
1005 | mutex_unlock(&chip->mutex); | |
1006 | } else { | |
1007 | if (!pm_runtime_suspended(dev)) | |
1008 | pm_runtime_put(dev); | |
1009 | } | |
1010 | return len; | |
1011 | } | |
1012 | ||
1013 | static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, | |
1014 | apds990x_power_state_show, | |
1015 | apds990x_power_state_store); | |
1016 | ||
1017 | static ssize_t apds990x_chip_id_show(struct device *dev, | |
1018 | struct device_attribute *attr, char *buf) | |
1019 | { | |
1020 | struct apds990x_chip *chip = dev_get_drvdata(dev); | |
1021 | return sprintf(buf, "%s %d\n", chip->chipname, chip->revision); | |
1022 | } | |
1023 | ||
1024 | static DEVICE_ATTR(chip_id, S_IRUGO, apds990x_chip_id_show, NULL); | |
1025 | ||
1026 | static struct attribute *sysfs_attrs_ctrl[] = { | |
1027 | &dev_attr_lux0_calibscale.attr, | |
1028 | &dev_attr_lux0_calibscale_default.attr, | |
1029 | &dev_attr_lux0_input.attr, | |
1030 | &dev_attr_lux0_sensor_range.attr, | |
1031 | &dev_attr_lux0_rate.attr, | |
1032 | &dev_attr_lux0_rate_avail.attr, | |
1033 | &dev_attr_lux0_thresh_above_value.attr, | |
1034 | &dev_attr_lux0_thresh_below_value.attr, | |
1035 | &dev_attr_prox0_raw_en.attr, | |
1036 | &dev_attr_prox0_raw.attr, | |
1037 | &dev_attr_prox0_sensor_range.attr, | |
1038 | &dev_attr_prox0_thresh_above_value.attr, | |
1039 | &dev_attr_prox0_reporting_mode.attr, | |
1040 | &dev_attr_prox0_reporting_mode_avail.attr, | |
1041 | &dev_attr_chip_id.attr, | |
1042 | &dev_attr_power_state.attr, | |
1043 | NULL | |
1044 | }; | |
1045 | ||
1046 | static struct attribute_group apds990x_attribute_group[] = { | |
1047 | {.attrs = sysfs_attrs_ctrl }, | |
1048 | }; | |
1049 | ||
80c8ae28 | 1050 | static int apds990x_probe(struct i2c_client *client, |
92b1f84d SO |
1051 | const struct i2c_device_id *id) |
1052 | { | |
1053 | struct apds990x_chip *chip; | |
1054 | int err; | |
1055 | ||
1056 | chip = kzalloc(sizeof *chip, GFP_KERNEL); | |
1057 | if (!chip) | |
1058 | return -ENOMEM; | |
1059 | ||
1060 | i2c_set_clientdata(client, chip); | |
1061 | chip->client = client; | |
1062 | ||
1063 | init_waitqueue_head(&chip->wait); | |
1064 | mutex_init(&chip->mutex); | |
1065 | chip->pdata = client->dev.platform_data; | |
1066 | ||
1067 | if (chip->pdata == NULL) { | |
1068 | dev_err(&client->dev, "platform data is mandatory\n"); | |
1069 | err = -EINVAL; | |
1070 | goto fail1; | |
1071 | } | |
1072 | ||
1073 | if (chip->pdata->cf.ga == 0) { | |
1074 | /* set uncovered sensor default parameters */ | |
1075 | chip->cf.ga = 1966; /* 0.48 * APDS_PARAM_SCALE */ | |
1076 | chip->cf.cf1 = 4096; /* 1.00 * APDS_PARAM_SCALE */ | |
1077 | chip->cf.irf1 = 9134; /* 2.23 * APDS_PARAM_SCALE */ | |
1078 | chip->cf.cf2 = 2867; /* 0.70 * APDS_PARAM_SCALE */ | |
1079 | chip->cf.irf2 = 5816; /* 1.42 * APDS_PARAM_SCALE */ | |
1080 | chip->cf.df = 52; | |
1081 | } else { | |
1082 | chip->cf = chip->pdata->cf; | |
1083 | } | |
1084 | ||
1085 | /* precalculate inverse chip factors for threshold control */ | |
1086 | chip->rcf.afactor = | |
1087 | (chip->cf.irf1 - chip->cf.irf2) * APDS_PARAM_SCALE / | |
1088 | (chip->cf.cf1 - chip->cf.cf2); | |
1089 | chip->rcf.cf1 = APDS_PARAM_SCALE * APDS_PARAM_SCALE / | |
1090 | chip->cf.cf1; | |
1091 | chip->rcf.irf1 = chip->cf.irf1 * APDS_PARAM_SCALE / | |
1092 | chip->cf.cf1; | |
1093 | chip->rcf.cf2 = APDS_PARAM_SCALE * APDS_PARAM_SCALE / | |
1094 | chip->cf.cf2; | |
1095 | chip->rcf.irf2 = chip->cf.irf2 * APDS_PARAM_SCALE / | |
1096 | chip->cf.cf2; | |
1097 | ||
1098 | /* Set something to start with */ | |
1099 | chip->lux_thres_hi = APDS_LUX_DEF_THRES_HI; | |
1100 | chip->lux_thres_lo = APDS_LUX_DEF_THRES_LO; | |
1101 | chip->lux_calib = APDS_LUX_NEUTRAL_CALIB_VALUE; | |
1102 | ||
1103 | chip->prox_thres = APDS_PROX_DEF_THRES; | |
1104 | chip->pdrive = chip->pdata->pdrive; | |
1105 | chip->pdiode = APDS_PDIODE_IR; | |
1106 | chip->pgain = APDS_PGAIN_1X; | |
1107 | chip->prox_calib = APDS_PROX_NEUTRAL_CALIB_VALUE; | |
1108 | chip->prox_persistence = APDS_DEFAULT_PROX_PERS; | |
1109 | chip->prox_continuous_mode = false; | |
1110 | ||
1111 | chip->regs[0].supply = reg_vcc; | |
1112 | chip->regs[1].supply = reg_vled; | |
1113 | ||
1114 | err = regulator_bulk_get(&client->dev, | |
1115 | ARRAY_SIZE(chip->regs), chip->regs); | |
1116 | if (err < 0) { | |
1117 | dev_err(&client->dev, "Cannot get regulators\n"); | |
1118 | goto fail1; | |
1119 | } | |
1120 | ||
1121 | err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), chip->regs); | |
1122 | if (err < 0) { | |
1123 | dev_err(&client->dev, "Cannot enable regulators\n"); | |
1124 | goto fail2; | |
1125 | } | |
1126 | ||
1127 | usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY); | |
1128 | ||
1129 | err = apds990x_detect(chip); | |
1130 | if (err < 0) { | |
1131 | dev_err(&client->dev, "APDS990X not found\n"); | |
1132 | goto fail3; | |
1133 | } | |
1134 | ||
1135 | pm_runtime_set_active(&client->dev); | |
1136 | ||
1137 | apds990x_configure(chip); | |
1138 | apds990x_set_arate(chip, APDS_LUX_DEFAULT_RATE); | |
1139 | apds990x_mode_on(chip); | |
1140 | ||
1141 | pm_runtime_enable(&client->dev); | |
1142 | ||
1143 | if (chip->pdata->setup_resources) { | |
1144 | err = chip->pdata->setup_resources(); | |
1145 | if (err) { | |
1146 | err = -EINVAL; | |
1147 | goto fail3; | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | err = sysfs_create_group(&chip->client->dev.kobj, | |
1152 | apds990x_attribute_group); | |
1153 | if (err < 0) { | |
1154 | dev_err(&chip->client->dev, "Sysfs registration failed\n"); | |
1155 | goto fail4; | |
1156 | } | |
1157 | ||
1158 | err = request_threaded_irq(client->irq, NULL, | |
1159 | apds990x_irq, | |
1160 | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW | | |
1161 | IRQF_ONESHOT, | |
1162 | "apds990x", chip); | |
1163 | if (err) { | |
1164 | dev_err(&client->dev, "could not get IRQ %d\n", | |
1165 | client->irq); | |
1166 | goto fail5; | |
1167 | } | |
1168 | return err; | |
1169 | fail5: | |
1170 | sysfs_remove_group(&chip->client->dev.kobj, | |
1171 | &apds990x_attribute_group[0]); | |
1172 | fail4: | |
1173 | if (chip->pdata && chip->pdata->release_resources) | |
1174 | chip->pdata->release_resources(); | |
1175 | fail3: | |
1176 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); | |
1177 | fail2: | |
1178 | regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs); | |
1179 | fail1: | |
1180 | kfree(chip); | |
1181 | return err; | |
1182 | } | |
1183 | ||
486a5c28 | 1184 | static int apds990x_remove(struct i2c_client *client) |
92b1f84d SO |
1185 | { |
1186 | struct apds990x_chip *chip = i2c_get_clientdata(client); | |
1187 | ||
1188 | free_irq(client->irq, chip); | |
1189 | sysfs_remove_group(&chip->client->dev.kobj, | |
1190 | apds990x_attribute_group); | |
1191 | ||
1192 | if (chip->pdata && chip->pdata->release_resources) | |
1193 | chip->pdata->release_resources(); | |
1194 | ||
1195 | if (!pm_runtime_suspended(&client->dev)) | |
1196 | apds990x_chip_off(chip); | |
1197 | ||
1198 | pm_runtime_disable(&client->dev); | |
1199 | pm_runtime_set_suspended(&client->dev); | |
1200 | ||
1201 | regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs); | |
1202 | ||
1203 | kfree(chip); | |
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | #ifdef CONFIG_PM | |
1208 | static int apds990x_suspend(struct device *dev) | |
1209 | { | |
1210 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1211 | struct apds990x_chip *chip = i2c_get_clientdata(client); | |
1212 | ||
1213 | apds990x_chip_off(chip); | |
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | static int apds990x_resume(struct device *dev) | |
1218 | { | |
1219 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1220 | struct apds990x_chip *chip = i2c_get_clientdata(client); | |
1221 | ||
1222 | /* | |
1223 | * If we were enabled at suspend time, it is expected | |
1224 | * everything works nice and smoothly. Chip_on is enough | |
1225 | */ | |
1226 | apds990x_chip_on(chip); | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | #else | |
1231 | #define apds990x_suspend NULL | |
1232 | #define apds990x_resume NULL | |
1233 | #define apds990x_shutdown NULL | |
1234 | #endif | |
1235 | ||
1236 | #ifdef CONFIG_PM_RUNTIME | |
1237 | static int apds990x_runtime_suspend(struct device *dev) | |
1238 | { | |
1239 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1240 | struct apds990x_chip *chip = i2c_get_clientdata(client); | |
1241 | ||
1242 | apds990x_chip_off(chip); | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static int apds990x_runtime_resume(struct device *dev) | |
1247 | { | |
1248 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1249 | struct apds990x_chip *chip = i2c_get_clientdata(client); | |
1250 | ||
1251 | apds990x_chip_on(chip); | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | #endif | |
1256 | ||
1257 | static const struct i2c_device_id apds990x_id[] = { | |
1258 | {"apds990x", 0 }, | |
1259 | {} | |
1260 | }; | |
1261 | ||
1262 | MODULE_DEVICE_TABLE(i2c, apds990x_id); | |
1263 | ||
1264 | static const struct dev_pm_ops apds990x_pm_ops = { | |
1265 | SET_SYSTEM_SLEEP_PM_OPS(apds990x_suspend, apds990x_resume) | |
1266 | SET_RUNTIME_PM_OPS(apds990x_runtime_suspend, | |
1267 | apds990x_runtime_resume, | |
1268 | NULL) | |
1269 | }; | |
1270 | ||
1271 | static struct i2c_driver apds990x_driver = { | |
1272 | .driver = { | |
1273 | .name = "apds990x", | |
1274 | .owner = THIS_MODULE, | |
1275 | .pm = &apds990x_pm_ops, | |
1276 | }, | |
1277 | .probe = apds990x_probe, | |
2d6bed9c | 1278 | .remove = apds990x_remove, |
92b1f84d SO |
1279 | .id_table = apds990x_id, |
1280 | }; | |
1281 | ||
a64fe2ed | 1282 | module_i2c_driver(apds990x_driver); |
92b1f84d SO |
1283 | |
1284 | MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor"); | |
1285 | MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); | |
1286 | MODULE_LICENSE("GPL v2"); |