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Merge tag 'amd-drm-fixes-5.12-2021-03-03' of https://gitlab.freedesktop.org/agd5f...
[linux.git] / drivers / misc / bh1770glc.c
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2b27bdcc 1// SPDX-License-Identifier: GPL-2.0-only
190420ab
SO		 2/*
3 * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 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 <[email protected]>
190420ab
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>
7ae5f10a 16#include <linux/platform_data/bh1770glc.h>
190420ab
SO		 17#include <linux/regulator/consumer.h>
18#include <linux/pm_runtime.h>
19#include <linux/workqueue.h>
20#include <linux/delay.h>
21#include <linux/wait.h>
22#include <linux/slab.h>
23
24#define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */
25#define BH1770_PS_CONTROL 0x81 /* PS operation mode control */
26#define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */
27#define BH1770_I_LED3 0x83 /* LED3 current setting */
28#define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */
29#define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */
30#define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */
31#define BH1770_PART_ID 0x8a /* Part number and revision ID */
32#define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */
33#define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */
34#define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */
35#define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */
36#define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */
37#define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */
38#define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */
39#define BH1770_INTERRUPT 0x92 /* Interrupt setting */
40#define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */
41#define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */
42#define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */
43#define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */
44#define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */
45#define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */
46#define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */
47
48/* MANUFACT_ID */
49#define BH1770_MANUFACT_ROHM 0x01
50#define BH1770_MANUFACT_OSRAM 0x03
51
52/* PART_ID */
53#define BH1770_PART 0x90
54#define BH1770_PART_MASK 0xf0
55#define BH1770_REV_MASK 0x0f
56#define BH1770_REV_SHIFT 0
57#define BH1770_REV_0 0x00
58#define BH1770_REV_1 0x01
59
60/* Operating modes for both */
61#define BH1770_STANDBY 0x00
62#define BH1770_FORCED 0x02
63#define BH1770_STANDALONE 0x03
64#define BH1770_SWRESET (0x01 << 2)
65
66#define BH1770_PS_TRIG_MEAS (1 << 0)
67#define BH1770_ALS_TRIG_MEAS (1 << 1)
68
69/* Interrupt control */
70#define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */
71#define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */
72#define BH1770_INT_ALS_ENA (1 << 1)
73#define BH1770_INT_PS_ENA (1 << 0)
74
75/* Interrupt status */
76#define BH1770_INT_LED1_DATA (1 << 0)
77#define BH1770_INT_LED1_INT (1 << 1)
78#define BH1770_INT_LED2_DATA (1 << 2)
79#define BH1770_INT_LED2_INT (1 << 3)
80#define BH1770_INT_LED3_DATA (1 << 4)
81#define BH1770_INT_LED3_INT (1 << 5)
82#define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5))
83#define BH1770_INT_ALS_DATA (1 << 6)
84#define BH1770_INT_ALS_INT (1 << 7)
85
86/* Led channels */
87#define BH1770_LED1 0x00
88
89#define BH1770_DISABLE 0
90#define BH1770_ENABLE 1
91#define BH1770_PROX_CHANNELS 1
92
93#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */
94#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */
95#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */
96#define BH1770_STARTUP_DELAY 50
97#define BH1770_RESET_TIME 10
98#define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */
99
100#define BH1770_LUX_RANGE 65535
101#define BH1770_PROX_RANGE 255
102#define BH1770_COEF_SCALER 1024
103#define BH1770_CALIB_SCALER 8192
104#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER)
105#define BH1770_LUX_DEF_THRES 1000
106#define BH1770_PROX_DEF_THRES 70
107#define BH1770_PROX_DEF_ABS_THRES 100
108#define BH1770_DEFAULT_PERSISTENCE 10
109#define BH1770_PROX_MAX_PERSISTENCE 50
110#define BH1770_LUX_GA_SCALE 16384
111#define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */
112#define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE
113#define BH1770_LUX_CORR_SCALE 4096
114
115#define PROX_ABOVE_THRESHOLD 1
116#define PROX_BELOW_THRESHOLD 0
117
118#define PROX_IGNORE_LUX_LIMIT 500
119
120struct bh1770_chip {
121 struct bh1770_platform_data *pdata;
122 char chipname[10];
123 u8 revision;
124 struct i2c_client *client;
125 struct regulator_bulk_data regs[2];
126 struct mutex mutex; /* avoid parallel access */
127 wait_queue_head_t wait;
128
129 bool int_mode_prox;
130 bool int_mode_lux;
131 struct delayed_work prox_work;
132 u32 lux_cf; /* Chip specific factor */
133 u32 lux_ga;
134 u32 lux_calib;
135 int lux_rate_index;
136 u32 lux_corr;
137 u16 lux_data_raw;
138 u16 lux_threshold_hi;
139 u16 lux_threshold_lo;
140 u16 lux_thres_hi_onchip;
141 u16 lux_thres_lo_onchip;
142 bool lux_wait_result;
143
144 int prox_enable_count;
145 u16 prox_coef;
146 u16 prox_const;
147 int prox_rate;
148 int prox_rate_threshold;
149 u8 prox_persistence;
150 u8 prox_persistence_counter;
151 u8 prox_data;
152 u8 prox_threshold;
153 u8 prox_threshold_hw;
154 bool prox_force_update;
155 u8 prox_abs_thres;
156 u8 prox_led;
157};
158
159static const char reg_vcc[] = "Vcc";
160static const char reg_vleds[] = "Vleds";
161
162/*
163 * Supported stand alone rates in ms from chip data sheet
164 * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000};
165 */
166static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
167static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
168
190420ab
SO		 169/*
170 * Supported stand alone rates in ms from chip data sheet
171 * {100, 200, 500, 1000, 2000};
172 */
173static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0};
174
175/*
176 * interrupt control functions are called while keeping chip->mutex
177 * excluding module probe / remove
178 */
179static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip,
180 int lux)
181{
182 chip->int_mode_lux = lux;
183 /* Set interrupt modes, interrupt active low, latched */
184 return i2c_smbus_write_byte_data(chip->client,
185 BH1770_INTERRUPT,
186 (lux << 1) | chip->int_mode_prox);
187}
188
189static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip,
190 int ps)
191{
192 chip->int_mode_prox = ps;
193 return i2c_smbus_write_byte_data(chip->client,
194 BH1770_INTERRUPT,
195 (chip->int_mode_lux << 1) | (ps << 0));
196}
197
198/* chip->mutex is always kept here */
199static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index)
200{
201 /* sysfs may call this when the chip is powered off */
202 if (pm_runtime_suspended(&chip->client->dev))
203 return 0;
204
205 /* Proper proximity response needs fastest lux rate (100ms) */
206 if (chip->prox_enable_count)
207 rate_index = 0;
208
209 return i2c_smbus_write_byte_data(chip->client,
210 BH1770_ALS_MEAS_RATE,
211 rate_index);
212}
213
214static int bh1770_prox_rate(struct bh1770_chip *chip, int mode)
215{
216 int rate;
217
218 rate = (mode == PROX_ABOVE_THRESHOLD) ?
219 chip->prox_rate_threshold : chip->prox_rate;
220
221 return i2c_smbus_write_byte_data(chip->client,
222 BH1770_PS_MEAS_RATE,
223 rate);
224}
225
226/* InfraredLED is controlled by the chip during proximity scanning */
227static inline int bh1770_led_cfg(struct bh1770_chip *chip)
228{
229 /* LED cfg, current for leds 1 and 2 */
230 return i2c_smbus_write_byte_data(chip->client,
231 BH1770_I_LED,
232 (BH1770_LED1 << 6) |
233 (BH1770_LED_5mA << 3) |
234 chip->prox_led);
235}
236
237/*
238 * Following two functions converts raw ps values from HW to normalized
239 * values. Purpose is to compensate differences between different sensor
240 * versions and variants so that result means about the same between
241 * versions.
242 */
243static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw)
244{
245 u16 adjusted;
246 adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) /
247 BH1770_COEF_SCALER);
248 if (adjusted > BH1770_PROX_RANGE)
249 adjusted = BH1770_PROX_RANGE;
250 return adjusted;
251}
252
253static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps)
254{
255 u16 raw;
256
257 raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef);
258 if (raw > chip->prox_const)
259 raw = raw - chip->prox_const;
260 else
261 raw = 0;
262 return raw;
263}
264
265/*
266 * Following two functions converts raw lux values from HW to normalized
267 * values. Purpose is to compensate differences between different sensor
268 * versions and variants so that result means about the same between
269 * versions. Chip->mutex is kept when this is called.
270 */
271static int bh1770_prox_set_threshold(struct bh1770_chip *chip)
272{
273 u8 tmp = 0;
274
275 /* sysfs may call this when the chip is powered off */
276 if (pm_runtime_suspended(&chip->client->dev))
277 return 0;
278
279 tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold);
280 chip->prox_threshold_hw = tmp;
281
282 return i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1,
283 tmp);
284}
285
286static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw)
287{
288 u32 lux;
289 lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE;
290 return min(lux, (u32)BH1770_LUX_RANGE);
291}
292
293static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip,
294 u16 adjusted)
295{
296 return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr;
297}
298
299/* chip->mutex is kept when this is called */
300static int bh1770_lux_update_thresholds(struct bh1770_chip *chip,
301 u16 threshold_hi, u16 threshold_lo)
302{
303 u8 data[4];
304 int ret;
305
306 /* sysfs may call this when the chip is powered off */
307 if (pm_runtime_suspended(&chip->client->dev))
308 return 0;
309
310 /*
311 * Compensate threshold values with the correction factors if not
312 * set to minimum or maximum.
313 * Min & max values disables interrupts.
314 */
315 if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0)
316 threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi);
317
318 if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0)
319 threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo);
320
321 if (chip->lux_thres_hi_onchip == threshold_hi &&
322 chip->lux_thres_lo_onchip == threshold_lo)
323 return 0;
324
325 chip->lux_thres_hi_onchip = threshold_hi;
326 chip->lux_thres_lo_onchip = threshold_lo;
327
328 data[0] = threshold_hi;
329 data[1] = threshold_hi >> 8;
330 data[2] = threshold_lo;
331 data[3] = threshold_lo >> 8;
332
333 ret = i2c_smbus_write_i2c_block_data(chip->client,
334 BH1770_ALS_TH_UP_0,
335 ARRAY_SIZE(data),
336 data);
337 return ret;
338}
339
340static int bh1770_lux_get_result(struct bh1770_chip *chip)
341{
342 u16 data;
343 int ret;
344
345 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0);
346 if (ret < 0)
347 return ret;
348
349 data = ret & 0xff;
350 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1);
351 if (ret < 0)
352 return ret;
353
354 chip->lux_data_raw = data | ((ret & 0xff) << 8);
355
356 return 0;
357}
358
359/* Calculate correction value which contains chip and device specific parts */
360static u32 bh1770_get_corr_value(struct bh1770_chip *chip)
361{
362 u32 tmp;
363 /* Impact of glass attenuation correction */
364 tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE;
365 /* Impact of chip factor correction */
366 tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE;
367 /* Impact of Device specific calibration correction */
368 tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER;
369 return tmp;
370}
371
372static int bh1770_lux_read_result(struct bh1770_chip *chip)
373{
374 bh1770_lux_get_result(chip);
375 return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw);
376}
377
378/*
379 * Chip on / off functions are called while keeping mutex except probe
380 * or remove phase
381 */
382static int bh1770_chip_on(struct bh1770_chip *chip)
383{
384 int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
385 chip->regs);
386 if (ret < 0)
387 return ret;
388
389 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
390
391 /* Reset the chip */
392 i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL,
393 BH1770_SWRESET);
394 usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2);
395
396 /*
397 * ALS is started always since proximity needs als results
398 * for realibility estimation.
399 * Let's assume dark until the first ALS measurement is ready.
400 */
401 chip->lux_data_raw = 0;
402 chip->prox_data = 0;
403 ret = i2c_smbus_write_byte_data(chip->client,
404 BH1770_ALS_CONTROL, BH1770_STANDALONE);
405
406 /* Assume reset defaults */
407 chip->lux_thres_hi_onchip = BH1770_LUX_RANGE;
408 chip->lux_thres_lo_onchip = 0;
409
410 return ret;
411}
412
413static void bh1770_chip_off(struct bh1770_chip *chip)
414{
415 i2c_smbus_write_byte_data(chip->client,
416 BH1770_INTERRUPT, BH1770_DISABLE);
417 i2c_smbus_write_byte_data(chip->client,
418 BH1770_ALS_CONTROL, BH1770_STANDBY);
419 i2c_smbus_write_byte_data(chip->client,
420 BH1770_PS_CONTROL, BH1770_STANDBY);
421 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
422}
423
424/* chip->mutex is kept when this is called */
425static int bh1770_prox_mode_control(struct bh1770_chip *chip)
426{
427 if (chip->prox_enable_count) {
428 chip->prox_force_update = true; /* Force immediate update */
429
430 bh1770_lux_rate(chip, chip->lux_rate_index);
431 bh1770_prox_set_threshold(chip);
432 bh1770_led_cfg(chip);
433 bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD);
434 bh1770_prox_interrupt_control(chip, BH1770_ENABLE);
435 i2c_smbus_write_byte_data(chip->client,
436 BH1770_PS_CONTROL, BH1770_STANDALONE);
437 } else {
438 chip->prox_data = 0;
439 bh1770_lux_rate(chip, chip->lux_rate_index);
440 bh1770_prox_interrupt_control(chip, BH1770_DISABLE);
441 i2c_smbus_write_byte_data(chip->client,
442 BH1770_PS_CONTROL, BH1770_STANDBY);
443 }
444 return 0;
445}
446
447/* chip->mutex is kept when this is called */
448static int bh1770_prox_read_result(struct bh1770_chip *chip)
449{
450 int ret;
451 bool above;
452 u8 mode;
453
454 ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1);
455 if (ret < 0)
456 goto out;
457
458 if (ret > chip->prox_threshold_hw)
459 above = true;
460 else
461 above = false;
462
463 /*
464 * when ALS levels goes above limit, proximity result may be
465 * false proximity. Thus ignore the result. With real proximity
466 * there is a shadow causing low als levels.
467 */
468 if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT)
469 ret = 0;
470
471 chip->prox_data = bh1770_psraw_to_adjusted(chip, ret);
472
473 /* Strong proximity level or force mode requires immediate response */
474 if (chip->prox_data >= chip->prox_abs_thres ||
475 chip->prox_force_update)
476 chip->prox_persistence_counter = chip->prox_persistence;
477
478 chip->prox_force_update = false;
479
480 /* Persistence filttering to reduce false proximity events */
481 if (likely(above)) {
482 if (chip->prox_persistence_counter < chip->prox_persistence) {
483 chip->prox_persistence_counter++;
484 ret = -ENODATA;
485 } else {
486 mode = PROX_ABOVE_THRESHOLD;
487 ret = 0;
488 }
489 } else {
490 chip->prox_persistence_counter = 0;
491 mode = PROX_BELOW_THRESHOLD;
492 chip->prox_data = 0;
493 ret = 0;
494 }
495
496 /* Set proximity detection rate based on above or below value */
497 if (ret == 0) {
498 bh1770_prox_rate(chip, mode);
499 sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw");
500 }
501out:
502 return ret;
503}
504
505static int bh1770_detect(struct bh1770_chip *chip)
506{
507 struct i2c_client *client = chip->client;
508 s32 ret;
509 u8 manu, part;
510
511 ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID);
512 if (ret < 0)
513 goto error;
514 manu = (u8)ret;
515
516 ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID);
517 if (ret < 0)
518 goto error;
519 part = (u8)ret;
520
521 chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT;
522 chip->prox_coef = BH1770_COEF_SCALER;
523 chip->prox_const = 0;
524 chip->lux_cf = BH1770_NEUTRAL_CF;
525
526 if ((manu == BH1770_MANUFACT_ROHM) &&
527 ((part & BH1770_PART_MASK) == BH1770_PART)) {
528 snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC");
529 return 0;
530 }
531
532 if ((manu == BH1770_MANUFACT_OSRAM) &&
533 ((part & BH1770_PART_MASK) == BH1770_PART)) {
534 snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770");
535 /* Values selected by comparing different versions */
536 chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */
537 chip->prox_const = 40;
538 return 0;
539 }
540
541 ret = -ENODEV;
542error:
543 dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n");
544
545 return ret;
546}
547
548/*
549 * This work is re-scheduled at every proximity interrupt.
550 * If this work is running, it means that there hasn't been any
551 * proximity interrupt in time. Situation is handled as no-proximity.
552 * It would be nice to have low-threshold interrupt or interrupt
553 * when measurement and hi-threshold are both 0. But neither of those exists.
554 * This is a workaroud for missing HW feature.
555 */
556
557static void bh1770_prox_work(struct work_struct *work)
558{
559 struct bh1770_chip *chip =
560 container_of(work, struct bh1770_chip, prox_work.work);
561
562 mutex_lock(&chip->mutex);
563 bh1770_prox_read_result(chip);
564 mutex_unlock(&chip->mutex);
565}
566
567/* This is threaded irq handler */
568static irqreturn_t bh1770_irq(int irq, void *data)
569{
570 struct bh1770_chip *chip = data;
571 int status;
572 int rate = 0;
573
574 mutex_lock(&chip->mutex);
575 status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS);
576
577 /* Acknowledge interrupt by reading this register */
578 i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT);
579
580 /*
581 * Check if there is fresh data available for als.
582 * If this is the very first data, update thresholds after that.
583 */
584 if (status & BH1770_INT_ALS_DATA) {
585 bh1770_lux_get_result(chip);
586 if (unlikely(chip->lux_wait_result)) {
587 chip->lux_wait_result = false;
588 wake_up(&chip->wait);
589 bh1770_lux_update_thresholds(chip,
590 chip->lux_threshold_hi,
591 chip->lux_threshold_lo);
592 }
593 }
594
595 /* Disable interrupt logic to guarantee acknowledgement */
596 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
597 (0 << 1) | (0 << 0));
598
599 if ((status & BH1770_INT_ALS_INT))
600 sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input");
601
602 if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) {
603 rate = prox_rates_ms[chip->prox_rate_threshold];
604 bh1770_prox_read_result(chip);
605 }
606
607 /* Re-enable interrupt logic */
608 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
609 (chip->int_mode_lux << 1) |
610 (chip->int_mode_prox << 0));
611 mutex_unlock(&chip->mutex);
612
613 /*
614 * Can't cancel work while keeping mutex since the work uses the
615 * same mutex.
616 */
617 if (rate) {
618 /*
619 * Simulate missing no-proximity interrupt 50ms after the
620 * next expected interrupt time.
621 */
622 cancel_delayed_work_sync(&chip->prox_work);
623 schedule_delayed_work(&chip->prox_work,
624 msecs_to_jiffies(rate + 50));
625 }
626 return IRQ_HANDLED;
627}
628
629static ssize_t bh1770_power_state_store(struct device *dev,
630 struct device_attribute *attr,
631 const char *buf, size_t count)
632{
633 struct bh1770_chip *chip = dev_get_drvdata(dev);
634 unsigned long value;
aec04288 635 ssize_t ret;
190420ab 636
f7b41276
JH		 637 ret = kstrtoul(buf, 0, &value);
638 if (ret)
639 return ret;
190420ab
SO		 640
641 mutex_lock(&chip->mutex);
642 if (value) {
643 pm_runtime_get_sync(dev);
644
645 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
aec04288
DC		 646 if (ret < 0) {
647 pm_runtime_put(dev);
648 goto leave;
649 }
190420ab 650
aec04288 651 ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
190420ab
SO		 652 if (ret < 0) {
653 pm_runtime_put(dev);
654 goto leave;
655 }
656
657 /* This causes interrupt after the next measurement cycle */
658 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
659 BH1770_LUX_DEF_THRES);
660 /* Inform that we are waiting for a result from ALS */
661 chip->lux_wait_result = true;
662 bh1770_prox_mode_control(chip);
663 } else if (!pm_runtime_suspended(dev)) {
664 pm_runtime_put(dev);
665 }
666 ret = count;
667leave:
668 mutex_unlock(&chip->mutex);
669 return ret;
670}
671
672static ssize_t bh1770_power_state_show(struct device *dev,
673 struct device_attribute *attr, char *buf)
674{
675 return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
676}
677
678static ssize_t bh1770_lux_result_show(struct device *dev,
679 struct device_attribute *attr, char *buf)
680{
681 struct bh1770_chip *chip = dev_get_drvdata(dev);
682 ssize_t ret;
683 long timeout;
684
685 if (pm_runtime_suspended(dev))
686 return -EIO; /* Chip is not enabled at all */
687
688 timeout = wait_event_interruptible_timeout(chip->wait,
689 !chip->lux_wait_result,
690 msecs_to_jiffies(BH1770_TIMEOUT));
691 if (!timeout)
692 return -EIO;
693
694 mutex_lock(&chip->mutex);
695 ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip));
696 mutex_unlock(&chip->mutex);
697
698 return ret;
699}
700
701static ssize_t bh1770_lux_range_show(struct device *dev,
702 struct device_attribute *attr, char *buf)
703{
704 return sprintf(buf, "%d\n", BH1770_LUX_RANGE);
705}
706
707static ssize_t bh1770_prox_enable_store(struct device *dev,
708 struct device_attribute *attr,
709 const char *buf, size_t count)
710{
711 struct bh1770_chip *chip = dev_get_drvdata(dev);
712 unsigned long value;
f7b41276 713 int ret;
190420ab 714
f7b41276
JH		 715 ret = kstrtoul(buf, 0, &value);
716 if (ret)
717 return ret;
190420ab
SO		 718
719 mutex_lock(&chip->mutex);
720 /* Assume no proximity. Sensor will tell real state soon */
721 if (!chip->prox_enable_count)
722 chip->prox_data = 0;
723
724 if (value)
725 chip->prox_enable_count++;
726 else if (chip->prox_enable_count > 0)
727 chip->prox_enable_count--;
728 else
729 goto leave;
730
731 /* Run control only when chip is powered on */
732 if (!pm_runtime_suspended(dev))
733 bh1770_prox_mode_control(chip);
734leave:
735 mutex_unlock(&chip->mutex);
736 return count;
737}
738
739static ssize_t bh1770_prox_enable_show(struct device *dev,
740 struct device_attribute *attr, char *buf)
741{
742 struct bh1770_chip *chip = dev_get_drvdata(dev);
743 ssize_t len;
744
745 mutex_lock(&chip->mutex);
746 len = sprintf(buf, "%d\n", chip->prox_enable_count);
747 mutex_unlock(&chip->mutex);
748 return len;
749}
750
751static ssize_t bh1770_prox_result_show(struct device *dev,
752 struct device_attribute *attr, char *buf)
753{
754 struct bh1770_chip *chip = dev_get_drvdata(dev);
755 ssize_t ret;
756
757 mutex_lock(&chip->mutex);
758 if (chip->prox_enable_count && !pm_runtime_suspended(dev))
759 ret = sprintf(buf, "%d\n", chip->prox_data);
760 else
761 ret = -EIO;
762 mutex_unlock(&chip->mutex);
763 return ret;
764}
765
766static ssize_t bh1770_prox_range_show(struct device *dev,
767 struct device_attribute *attr, char *buf)
768{
769 return sprintf(buf, "%d\n", BH1770_PROX_RANGE);
770}
771
772static ssize_t bh1770_get_prox_rate_avail(struct device *dev,
773 struct device_attribute *attr, char *buf)
774{
775 int i;
776 int pos = 0;
777 for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++)
778 pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]);
779 sprintf(buf + pos - 1, "\n");
780 return pos;
781}
782
783static ssize_t bh1770_get_prox_rate_above(struct device *dev,
784 struct device_attribute *attr, char *buf)
785{
786 struct bh1770_chip *chip = dev_get_drvdata(dev);
787 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]);
788}
789
790static ssize_t bh1770_get_prox_rate_below(struct device *dev,
791 struct device_attribute *attr, char *buf)
792{
793 struct bh1770_chip *chip = dev_get_drvdata(dev);
794 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]);
795}
796
797static int bh1770_prox_rate_validate(int rate)
798{
799 int i;
800
801 for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++)
802 if (rate >= prox_rates_hz[i])
803 break;
804 return i;
805}
806
807static ssize_t bh1770_set_prox_rate_above(struct device *dev,
808 struct device_attribute *attr,
809 const char *buf, size_t count)
810{
811 struct bh1770_chip *chip = dev_get_drvdata(dev);
812 unsigned long value;
f7b41276 813 int ret;
190420ab 814
f7b41276
JH		 815 ret = kstrtoul(buf, 0, &value);
816 if (ret)
817 return ret;
190420ab
SO		 818
819 mutex_lock(&chip->mutex);
820 chip->prox_rate_threshold = bh1770_prox_rate_validate(value);
821 mutex_unlock(&chip->mutex);
822 return count;
823}
824
825static ssize_t bh1770_set_prox_rate_below(struct device *dev,
826 struct device_attribute *attr,
827 const char *buf, size_t count)
828{
829 struct bh1770_chip *chip = dev_get_drvdata(dev);
830 unsigned long value;
f7b41276 831 int ret;
190420ab 832
f7b41276
JH		 833 ret = kstrtoul(buf, 0, &value);
834 if (ret)
835 return ret;
190420ab
SO		 836
837 mutex_lock(&chip->mutex);
838 chip->prox_rate = bh1770_prox_rate_validate(value);
839 mutex_unlock(&chip->mutex);
840 return count;
841}
842
843static ssize_t bh1770_get_prox_thres(struct device *dev,
844 struct device_attribute *attr, char *buf)
845{
846 struct bh1770_chip *chip = dev_get_drvdata(dev);
847 return sprintf(buf, "%d\n", chip->prox_threshold);
848}
849
850static ssize_t bh1770_set_prox_thres(struct device *dev,
851 struct device_attribute *attr,
852 const char *buf, size_t count)
853{
854 struct bh1770_chip *chip = dev_get_drvdata(dev);
855 unsigned long value;
856 int ret;
857
f7b41276
JH		 858 ret = kstrtoul(buf, 0, &value);
859 if (ret)
860 return ret;
861
190420ab
SO		 862 if (value > BH1770_PROX_RANGE)
863 return -EINVAL;
864
865 mutex_lock(&chip->mutex);
866 chip->prox_threshold = value;
867 ret = bh1770_prox_set_threshold(chip);
868 mutex_unlock(&chip->mutex);
869 if (ret < 0)
870 return ret;
871 return count;
872}
873
874static ssize_t bh1770_prox_persistence_show(struct device *dev,
875 struct device_attribute *attr, char *buf)
876{
877 struct bh1770_chip *chip = dev_get_drvdata(dev);
878
879 return sprintf(buf, "%u\n", chip->prox_persistence);
880}
881
882static ssize_t bh1770_prox_persistence_store(struct device *dev,
883 struct device_attribute *attr,
884 const char *buf, size_t len)
885{
886 struct bh1770_chip *chip = dev_get_drvdata(dev);
887 unsigned long value;
f7b41276 888 int ret;
190420ab 889
f7b41276
JH		 890 ret = kstrtoul(buf, 0, &value);
891 if (ret)
892 return ret;
190420ab
SO		 893
894 if (value > BH1770_PROX_MAX_PERSISTENCE)
895 return -EINVAL;
896
897 chip->prox_persistence = value;
898
899 return len;
900}
901
902static ssize_t bh1770_prox_abs_thres_show(struct device *dev,
903 struct device_attribute *attr, char *buf)
904{
905 struct bh1770_chip *chip = dev_get_drvdata(dev);
906 return sprintf(buf, "%u\n", chip->prox_abs_thres);
907}
908
909static ssize_t bh1770_prox_abs_thres_store(struct device *dev,
910 struct device_attribute *attr,
911 const char *buf, size_t len)
912{
913 struct bh1770_chip *chip = dev_get_drvdata(dev);
914 unsigned long value;
f7b41276 915 int ret;
190420ab 916
f7b41276
JH		 917 ret = kstrtoul(buf, 0, &value);
918 if (ret)
919 return ret;
190420ab
SO		 920
921 if (value > BH1770_PROX_RANGE)
922 return -EINVAL;
923
924 chip->prox_abs_thres = value;
925
926 return len;
927}
928
929static ssize_t bh1770_chip_id_show(struct device *dev,
930 struct device_attribute *attr, char *buf)
931{
932 struct bh1770_chip *chip = dev_get_drvdata(dev);
933 return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision);
934}
935
936static ssize_t bh1770_lux_calib_default_show(struct device *dev,
937 struct device_attribute *attr, char *buf)
938{
939 return sprintf(buf, "%u\n", BH1770_CALIB_SCALER);
940}
941
942static ssize_t bh1770_lux_calib_show(struct device *dev,
943 struct device_attribute *attr, char *buf)
944{
945 struct bh1770_chip *chip = dev_get_drvdata(dev);
946 ssize_t len;
947
948 mutex_lock(&chip->mutex);
949 len = sprintf(buf, "%u\n", chip->lux_calib);
950 mutex_unlock(&chip->mutex);
951 return len;
952}
953
954static ssize_t bh1770_lux_calib_store(struct device *dev,
955 struct device_attribute *attr,
956 const char *buf, size_t len)
957{
958 struct bh1770_chip *chip = dev_get_drvdata(dev);
959 unsigned long value;
960 u32 old_calib;
961 u32 new_corr;
f7b41276 962 int ret;
190420ab 963
f7b41276
JH		 964 ret = kstrtoul(buf, 0, &value);
965 if (ret)
966 return ret;
190420ab
SO		 967
968 mutex_lock(&chip->mutex);
969 old_calib = chip->lux_calib;
970 chip->lux_calib = value;
971 new_corr = bh1770_get_corr_value(chip);
972 if (new_corr == 0) {
973 chip->lux_calib = old_calib;
974 mutex_unlock(&chip->mutex);
975 return -EINVAL;
976 }
977 chip->lux_corr = new_corr;
978 /* Refresh thresholds on HW after changing correction value */
979 bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi,
980 chip->lux_threshold_lo);
981
982 mutex_unlock(&chip->mutex);
983
984 return len;
985}
986
987static ssize_t bh1770_get_lux_rate_avail(struct device *dev,
988 struct device_attribute *attr, char *buf)
989{
990 int i;
991 int pos = 0;
992 for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++)
993 pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]);
994 sprintf(buf + pos - 1, "\n");
995 return pos;
996}
997
998static ssize_t bh1770_get_lux_rate(struct device *dev,
999 struct device_attribute *attr, char *buf)
1000{
1001 struct bh1770_chip *chip = dev_get_drvdata(dev);
1002 return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]);
1003}
1004
1005static ssize_t bh1770_set_lux_rate(struct device *dev,
1006 struct device_attribute *attr,
1007 const char *buf, size_t count)
1008{
1009 struct bh1770_chip *chip = dev_get_drvdata(dev);
1010 unsigned long rate_hz;
1011 int ret, i;
1012
f7b41276
JH		 1013 ret = kstrtoul(buf, 0, &rate_hz);
1014 if (ret)
1015 return ret;
190420ab
SO		 1016
1017 for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++)
1018 if (rate_hz >= lux_rates_hz[i])
1019 break;
1020
1021 mutex_lock(&chip->mutex);
1022 chip->lux_rate_index = i;
1023 ret = bh1770_lux_rate(chip, i);
1024 mutex_unlock(&chip->mutex);
1025
1026 if (ret < 0)
1027 return ret;
1028
1029 return count;
1030}
1031
1032static ssize_t bh1770_get_lux_thresh_above(struct device *dev,
1033 struct device_attribute *attr, char *buf)
1034{
1035 struct bh1770_chip *chip = dev_get_drvdata(dev);
1036 return sprintf(buf, "%d\n", chip->lux_threshold_hi);
1037}
1038
1039static ssize_t bh1770_get_lux_thresh_below(struct device *dev,
1040 struct device_attribute *attr, char *buf)
1041{
1042 struct bh1770_chip *chip = dev_get_drvdata(dev);
1043 return sprintf(buf, "%d\n", chip->lux_threshold_lo);
1044}
1045
1046static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target,
1047 const char *buf)
1048{
190420ab 1049 unsigned long thresh;
f7b41276 1050 int ret;
190420ab 1051
f7b41276
JH		 1052 ret = kstrtoul(buf, 0, &thresh);
1053 if (ret)
1054 return ret;
190420ab
SO		 1055
1056 if (thresh > BH1770_LUX_RANGE)
1057 return -EINVAL;
1058
1059 mutex_lock(&chip->mutex);
1060 *target = thresh;
1061 /*
1062 * Don't update values in HW if we are still waiting for
1063 * first interrupt to come after device handle open call.
1064 */
1065 if (!chip->lux_wait_result)
1066 ret = bh1770_lux_update_thresholds(chip,
1067 chip->lux_threshold_hi,
1068 chip->lux_threshold_lo);
1069 mutex_unlock(&chip->mutex);
1070 return ret;
1071
1072}
1073
1074static ssize_t bh1770_set_lux_thresh_above(struct device *dev,
1075 struct device_attribute *attr,
1076 const char *buf, size_t len)
1077{
1078 struct bh1770_chip *chip = dev_get_drvdata(dev);
1079 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf);
1080 if (ret < 0)
1081 return ret;
1082 return len;
1083}
1084
1085static ssize_t bh1770_set_lux_thresh_below(struct device *dev,
1086 struct device_attribute *attr,
1087 const char *buf, size_t len)
1088{
1089 struct bh1770_chip *chip = dev_get_drvdata(dev);
1090 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf);
1091 if (ret < 0)
1092 return ret;
1093 return len;
1094}
1095
1096static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show,
1097 bh1770_prox_enable_store);
1098static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR,
1099 bh1770_prox_abs_thres_show,
1100 bh1770_prox_abs_thres_store);
1101static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR,
1102 bh1770_get_prox_thres,
1103 bh1770_set_prox_thres);
1104static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL);
1105static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL);
1106static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR,
1107 bh1770_prox_persistence_show,
1108 bh1770_prox_persistence_store);
1109static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR,
1110 bh1770_get_prox_rate_above,
1111 bh1770_set_prox_rate_above);
1112static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR,
1113 bh1770_get_prox_rate_below,
1114 bh1770_set_prox_rate_below);
1115static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL);
1116
1117static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show,
1118 bh1770_lux_calib_store);
1119static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
1120 bh1770_lux_calib_default_show,
1121 NULL);
1122static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL);
1123static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL);
1124static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate,
1125 bh1770_set_lux_rate);
1126static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL);
1127static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
1128 bh1770_get_lux_thresh_above,
1129 bh1770_set_lux_thresh_above);
1130static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
1131 bh1770_get_lux_thresh_below,
1132 bh1770_set_lux_thresh_below);
1133static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL);
1134static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show,
1135 bh1770_power_state_store);
1136
1137
1138static struct attribute *sysfs_attrs[] = {
1139 &dev_attr_lux0_calibscale.attr,
1140 &dev_attr_lux0_calibscale_default.attr,
1141 &dev_attr_lux0_input.attr,
1142 &dev_attr_lux0_sensor_range.attr,
1143 &dev_attr_lux0_rate.attr,
1144 &dev_attr_lux0_rate_avail.attr,
1145 &dev_attr_lux0_thresh_above_value.attr,
1146 &dev_attr_lux0_thresh_below_value.attr,
1147 &dev_attr_prox0_raw.attr,
1148 &dev_attr_prox0_sensor_range.attr,
1149 &dev_attr_prox0_raw_en.attr,
1150 &dev_attr_prox0_thresh_above_count.attr,
1151 &dev_attr_prox0_rate_above.attr,
1152 &dev_attr_prox0_rate_below.attr,
1153 &dev_attr_prox0_rate_avail.attr,
1154 &dev_attr_prox0_thresh_above0_value.attr,
1155 &dev_attr_prox0_thresh_above1_value.attr,
1156 &dev_attr_chip_id.attr,
1157 &dev_attr_power_state.attr,
1158 NULL
1159};
1160
0690ee2b 1161static const struct attribute_group bh1770_attribute_group = {
190420ab
SO		 1162 .attrs = sysfs_attrs
1163};
1164
80c8ae28 1165static int bh1770_probe(struct i2c_client *client,
190420ab
SO		 1166 const struct i2c_device_id *id)
1167{
1168 struct bh1770_chip *chip;
1169 int err;
1170
4734e390 1171 chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL);
190420ab
SO		 1172 if (!chip)
1173 return -ENOMEM;
1174
1175 i2c_set_clientdata(client, chip);
1176 chip->client = client;
1177
1178 mutex_init(&chip->mutex);
1179 init_waitqueue_head(&chip->wait);
1180 INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work);
1181
1182 if (client->dev.platform_data == NULL) {
1183 dev_err(&client->dev, "platform data is mandatory\n");
4734e390 1184 return -EINVAL;
190420ab
SO		 1185 }
1186
1187 chip->pdata = client->dev.platform_data;
1188 chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE;
1189 chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE;
1190 chip->lux_threshold_lo = BH1770_LUX_DEF_THRES;
1191 chip->lux_threshold_hi = BH1770_LUX_DEF_THRES;
1192
1193 if (chip->pdata->glass_attenuation == 0)
1194 chip->lux_ga = BH1770_NEUTRAL_GA;
1195 else
1196 chip->lux_ga = chip->pdata->glass_attenuation;
1197
1198 chip->prox_threshold = BH1770_PROX_DEF_THRES;
1199 chip->prox_led = chip->pdata->led_def_curr;
1200 chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES;
1201 chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE;
1202 chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH;
1203 chip->prox_rate = BH1770_PROX_DEFAULT_RATE;
1204 chip->prox_data = 0;
1205
1206 chip->regs[0].supply = reg_vcc;
1207 chip->regs[1].supply = reg_vleds;
1208
4734e390
HS		 1209 err = devm_regulator_bulk_get(&client->dev,
1210 ARRAY_SIZE(chip->regs), chip->regs);
190420ab
SO		 1211 if (err < 0) {
1212 dev_err(&client->dev, "Cannot get regulators\n");
4734e390 1213 return err;
190420ab
SO		 1214 }
1215
1216 err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
1217 chip->regs);
1218 if (err < 0) {
1219 dev_err(&client->dev, "Cannot enable regulators\n");
4734e390 1220 return err;
190420ab
SO		 1221 }
1222
1223 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
1224 err = bh1770_detect(chip);
1225 if (err < 0)
4734e390 1226 goto fail0;
190420ab
SO		 1227
1228 /* Start chip */
1229 bh1770_chip_on(chip);
1230 pm_runtime_set_active(&client->dev);
1231 pm_runtime_enable(&client->dev);
1232
1233 chip->lux_corr = bh1770_get_corr_value(chip);
1234 if (chip->lux_corr == 0) {
1235 dev_err(&client->dev, "Improper correction values\n");
1236 err = -EINVAL;
4734e390 1237 goto fail0;
190420ab
SO		 1238 }
1239
1240 if (chip->pdata->setup_resources) {
1241 err = chip->pdata->setup_resources();
1242 if (err) {
1243 err = -EINVAL;
4734e390 1244 goto fail0;
190420ab
SO		 1245 }
1246 }
1247
1248 err = sysfs_create_group(&chip->client->dev.kobj,
1249 &bh1770_attribute_group);
1250 if (err < 0) {
1251 dev_err(&chip->client->dev, "Sysfs registration failed\n");
4734e390 1252 goto fail1;
190420ab
SO		 1253 }
1254
1255 /*
1256 * Chip needs level triggered interrupt to work. However,
1257 * level triggering doesn't work always correctly with power
1258 * management. Select both
1259 */
1260 err = request_threaded_irq(client->irq, NULL,
1261 bh1770_irq,
1262 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
1263 IRQF_TRIGGER_LOW,
1264 "bh1770", chip);
1265 if (err) {
1266 dev_err(&client->dev, "could not get IRQ %d\n",
1267 client->irq);
4734e390 1268 goto fail2;
190420ab
SO		 1269 }
1270 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1271 return err;
4734e390 1272fail2:
190420ab
SO		 1273 sysfs_remove_group(&chip->client->dev.kobj,
1274 &bh1770_attribute_group);
4734e390 1275fail1:
190420ab
SO		 1276 if (chip->pdata->release_resources)
1277 chip->pdata->release_resources();
4734e390 1278fail0:
190420ab 1279 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
190420ab
SO		 1280 return err;
1281}
1282
486a5c28 1283static int bh1770_remove(struct i2c_client *client)
190420ab
SO		 1284{
1285 struct bh1770_chip *chip = i2c_get_clientdata(client);
1286
1287 free_irq(client->irq, chip);
1288
1289 sysfs_remove_group(&chip->client->dev.kobj,
1290 &bh1770_attribute_group);
1291
1292 if (chip->pdata->release_resources)
1293 chip->pdata->release_resources();
1294
1295 cancel_delayed_work_sync(&chip->prox_work);
1296
1297 if (!pm_runtime_suspended(&client->dev))
1298 bh1770_chip_off(chip);
1299
1300 pm_runtime_disable(&client->dev);
1301 pm_runtime_set_suspended(&client->dev);
1302
190420ab
SO		 1303 return 0;
1304}
1305
0ca19d6f 1306#ifdef CONFIG_PM_SLEEP
190420ab
SO		 1307static int bh1770_suspend(struct device *dev)
1308{
8c99d8e6 1309 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1310 struct bh1770_chip *chip = i2c_get_clientdata(client);
1311
1312 bh1770_chip_off(chip);
1313
1314 return 0;
1315}
1316
1317static int bh1770_resume(struct device *dev)
1318{
8c99d8e6 1319 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1320 struct bh1770_chip *chip = i2c_get_clientdata(client);
1321 int ret = 0;
1322
1323 bh1770_chip_on(chip);
1324
1325 if (!pm_runtime_suspended(dev)) {
1326 /*
1327 * If we were enabled at suspend time, it is expected
1328 * everything works nice and smoothly
1329 */
1330 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
1331 ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
1332
1333 /* This causes interrupt after the next measurement cycle */
1334 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
1335 BH1770_LUX_DEF_THRES);
1336 /* Inform that we are waiting for a result from ALS */
1337 chip->lux_wait_result = true;
1338 bh1770_prox_mode_control(chip);
1339 }
1340 return ret;
1341}
190420ab
SO		 1342#endif
1343
bbd6d050 1344#ifdef CONFIG_PM
190420ab
SO		 1345static int bh1770_runtime_suspend(struct device *dev)
1346{
8c99d8e6 1347 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1348 struct bh1770_chip *chip = i2c_get_clientdata(client);
1349
1350 bh1770_chip_off(chip);
1351
1352 return 0;
1353}
1354
1355static int bh1770_runtime_resume(struct device *dev)
1356{
8c99d8e6 1357 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1358 struct bh1770_chip *chip = i2c_get_clientdata(client);
1359
1360 bh1770_chip_on(chip);
1361
1362 return 0;
1363}
1364#endif
1365
1366static const struct i2c_device_id bh1770_id[] = {
1367 {"bh1770glc", 0 },
1368 {"sfh7770", 0 },
1369 {}
1370};
1371
1372MODULE_DEVICE_TABLE(i2c, bh1770_id);
1373
1374static const struct dev_pm_ops bh1770_pm_ops = {
1375 SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume)
1376 SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL)
1377};
1378
1379static struct i2c_driver bh1770_driver = {
1380 .driver = {
1381 .name = "bh1770glc",
190420ab
SO		 1382 .pm = &bh1770_pm_ops,
1383 },
1384 .probe = bh1770_probe,
2d6bed9c 1385 .remove = bh1770_remove,
190420ab
SO		 1386 .id_table = bh1770_id,
1387};
1388
a64fe2ed 1389module_i2c_driver(bh1770_driver);
190420ab
SO		 1390
1391MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor");
1392MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
1393MODULE_LICENSE("GPL v2");
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