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[linux-2.6-block.git] / drivers / misc / bh1770glc.c
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190420ab
SO		 1/*
2 * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 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>
7ae5f10a 30#include <linux/platform_data/bh1770glc.h>
190420ab
SO		 31#include <linux/regulator/consumer.h>
32#include <linux/pm_runtime.h>
33#include <linux/workqueue.h>
34#include <linux/delay.h>
35#include <linux/wait.h>
36#include <linux/slab.h>
37
38#define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */
39#define BH1770_PS_CONTROL 0x81 /* PS operation mode control */
40#define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */
41#define BH1770_I_LED3 0x83 /* LED3 current setting */
42#define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */
43#define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */
44#define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */
45#define BH1770_PART_ID 0x8a /* Part number and revision ID */
46#define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */
47#define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */
48#define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */
49#define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */
50#define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */
51#define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */
52#define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */
53#define BH1770_INTERRUPT 0x92 /* Interrupt setting */
54#define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */
55#define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */
56#define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */
57#define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */
58#define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */
59#define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */
60#define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */
61
62/* MANUFACT_ID */
63#define BH1770_MANUFACT_ROHM 0x01
64#define BH1770_MANUFACT_OSRAM 0x03
65
66/* PART_ID */
67#define BH1770_PART 0x90
68#define BH1770_PART_MASK 0xf0
69#define BH1770_REV_MASK 0x0f
70#define BH1770_REV_SHIFT 0
71#define BH1770_REV_0 0x00
72#define BH1770_REV_1 0x01
73
74/* Operating modes for both */
75#define BH1770_STANDBY 0x00
76#define BH1770_FORCED 0x02
77#define BH1770_STANDALONE 0x03
78#define BH1770_SWRESET (0x01 << 2)
79
80#define BH1770_PS_TRIG_MEAS (1 << 0)
81#define BH1770_ALS_TRIG_MEAS (1 << 1)
82
83/* Interrupt control */
84#define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */
85#define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */
86#define BH1770_INT_ALS_ENA (1 << 1)
87#define BH1770_INT_PS_ENA (1 << 0)
88
89/* Interrupt status */
90#define BH1770_INT_LED1_DATA (1 << 0)
91#define BH1770_INT_LED1_INT (1 << 1)
92#define BH1770_INT_LED2_DATA (1 << 2)
93#define BH1770_INT_LED2_INT (1 << 3)
94#define BH1770_INT_LED3_DATA (1 << 4)
95#define BH1770_INT_LED3_INT (1 << 5)
96#define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5))
97#define BH1770_INT_ALS_DATA (1 << 6)
98#define BH1770_INT_ALS_INT (1 << 7)
99
100/* Led channels */
101#define BH1770_LED1 0x00
102
103#define BH1770_DISABLE 0
104#define BH1770_ENABLE 1
105#define BH1770_PROX_CHANNELS 1
106
107#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */
108#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */
109#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */
110#define BH1770_STARTUP_DELAY 50
111#define BH1770_RESET_TIME 10
112#define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */
113
114#define BH1770_LUX_RANGE 65535
115#define BH1770_PROX_RANGE 255
116#define BH1770_COEF_SCALER 1024
117#define BH1770_CALIB_SCALER 8192
118#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER)
119#define BH1770_LUX_DEF_THRES 1000
120#define BH1770_PROX_DEF_THRES 70
121#define BH1770_PROX_DEF_ABS_THRES 100
122#define BH1770_DEFAULT_PERSISTENCE 10
123#define BH1770_PROX_MAX_PERSISTENCE 50
124#define BH1770_LUX_GA_SCALE 16384
125#define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */
126#define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE
127#define BH1770_LUX_CORR_SCALE 4096
128
129#define PROX_ABOVE_THRESHOLD 1
130#define PROX_BELOW_THRESHOLD 0
131
132#define PROX_IGNORE_LUX_LIMIT 500
133
134struct bh1770_chip {
135 struct bh1770_platform_data *pdata;
136 char chipname[10];
137 u8 revision;
138 struct i2c_client *client;
139 struct regulator_bulk_data regs[2];
140 struct mutex mutex; /* avoid parallel access */
141 wait_queue_head_t wait;
142
143 bool int_mode_prox;
144 bool int_mode_lux;
145 struct delayed_work prox_work;
146 u32 lux_cf; /* Chip specific factor */
147 u32 lux_ga;
148 u32 lux_calib;
149 int lux_rate_index;
150 u32 lux_corr;
151 u16 lux_data_raw;
152 u16 lux_threshold_hi;
153 u16 lux_threshold_lo;
154 u16 lux_thres_hi_onchip;
155 u16 lux_thres_lo_onchip;
156 bool lux_wait_result;
157
158 int prox_enable_count;
159 u16 prox_coef;
160 u16 prox_const;
161 int prox_rate;
162 int prox_rate_threshold;
163 u8 prox_persistence;
164 u8 prox_persistence_counter;
165 u8 prox_data;
166 u8 prox_threshold;
167 u8 prox_threshold_hw;
168 bool prox_force_update;
169 u8 prox_abs_thres;
170 u8 prox_led;
171};
172
173static const char reg_vcc[] = "Vcc";
174static const char reg_vleds[] = "Vleds";
175
176/*
177 * Supported stand alone rates in ms from chip data sheet
178 * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000};
179 */
180static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
181static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
182
190420ab
SO		 183/*
184 * Supported stand alone rates in ms from chip data sheet
185 * {100, 200, 500, 1000, 2000};
186 */
187static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0};
188
189/*
190 * interrupt control functions are called while keeping chip->mutex
191 * excluding module probe / remove
192 */
193static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip,
194 int lux)
195{
196 chip->int_mode_lux = lux;
197 /* Set interrupt modes, interrupt active low, latched */
198 return i2c_smbus_write_byte_data(chip->client,
199 BH1770_INTERRUPT,
200 (lux << 1) | chip->int_mode_prox);
201}
202
203static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip,
204 int ps)
205{
206 chip->int_mode_prox = ps;
207 return i2c_smbus_write_byte_data(chip->client,
208 BH1770_INTERRUPT,
209 (chip->int_mode_lux << 1) | (ps << 0));
210}
211
212/* chip->mutex is always kept here */
213static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index)
214{
215 /* sysfs may call this when the chip is powered off */
216 if (pm_runtime_suspended(&chip->client->dev))
217 return 0;
218
219 /* Proper proximity response needs fastest lux rate (100ms) */
220 if (chip->prox_enable_count)
221 rate_index = 0;
222
223 return i2c_smbus_write_byte_data(chip->client,
224 BH1770_ALS_MEAS_RATE,
225 rate_index);
226}
227
228static int bh1770_prox_rate(struct bh1770_chip *chip, int mode)
229{
230 int rate;
231
232 rate = (mode == PROX_ABOVE_THRESHOLD) ?
233 chip->prox_rate_threshold : chip->prox_rate;
234
235 return i2c_smbus_write_byte_data(chip->client,
236 BH1770_PS_MEAS_RATE,
237 rate);
238}
239
240/* InfraredLED is controlled by the chip during proximity scanning */
241static inline int bh1770_led_cfg(struct bh1770_chip *chip)
242{
243 /* LED cfg, current for leds 1 and 2 */
244 return i2c_smbus_write_byte_data(chip->client,
245 BH1770_I_LED,
246 (BH1770_LED1 << 6) |
247 (BH1770_LED_5mA << 3) |
248 chip->prox_led);
249}
250
251/*
252 * Following two functions converts raw ps values from HW to normalized
253 * values. Purpose is to compensate differences between different sensor
254 * versions and variants so that result means about the same between
255 * versions.
256 */
257static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw)
258{
259 u16 adjusted;
260 adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) /
261 BH1770_COEF_SCALER);
262 if (adjusted > BH1770_PROX_RANGE)
263 adjusted = BH1770_PROX_RANGE;
264 return adjusted;
265}
266
267static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps)
268{
269 u16 raw;
270
271 raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef);
272 if (raw > chip->prox_const)
273 raw = raw - chip->prox_const;
274 else
275 raw = 0;
276 return raw;
277}
278
279/*
280 * Following two functions converts raw lux values from HW to normalized
281 * values. Purpose is to compensate differences between different sensor
282 * versions and variants so that result means about the same between
283 * versions. Chip->mutex is kept when this is called.
284 */
285static int bh1770_prox_set_threshold(struct bh1770_chip *chip)
286{
287 u8 tmp = 0;
288
289 /* sysfs may call this when the chip is powered off */
290 if (pm_runtime_suspended(&chip->client->dev))
291 return 0;
292
293 tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold);
294 chip->prox_threshold_hw = tmp;
295
296 return i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1,
297 tmp);
298}
299
300static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw)
301{
302 u32 lux;
303 lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE;
304 return min(lux, (u32)BH1770_LUX_RANGE);
305}
306
307static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip,
308 u16 adjusted)
309{
310 return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr;
311}
312
313/* chip->mutex is kept when this is called */
314static int bh1770_lux_update_thresholds(struct bh1770_chip *chip,
315 u16 threshold_hi, u16 threshold_lo)
316{
317 u8 data[4];
318 int ret;
319
320 /* sysfs may call this when the chip is powered off */
321 if (pm_runtime_suspended(&chip->client->dev))
322 return 0;
323
324 /*
325 * Compensate threshold values with the correction factors if not
326 * set to minimum or maximum.
327 * Min & max values disables interrupts.
328 */
329 if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0)
330 threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi);
331
332 if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0)
333 threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo);
334
335 if (chip->lux_thres_hi_onchip == threshold_hi &&
336 chip->lux_thres_lo_onchip == threshold_lo)
337 return 0;
338
339 chip->lux_thres_hi_onchip = threshold_hi;
340 chip->lux_thres_lo_onchip = threshold_lo;
341
342 data[0] = threshold_hi;
343 data[1] = threshold_hi >> 8;
344 data[2] = threshold_lo;
345 data[3] = threshold_lo >> 8;
346
347 ret = i2c_smbus_write_i2c_block_data(chip->client,
348 BH1770_ALS_TH_UP_0,
349 ARRAY_SIZE(data),
350 data);
351 return ret;
352}
353
354static int bh1770_lux_get_result(struct bh1770_chip *chip)
355{
356 u16 data;
357 int ret;
358
359 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0);
360 if (ret < 0)
361 return ret;
362
363 data = ret & 0xff;
364 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1);
365 if (ret < 0)
366 return ret;
367
368 chip->lux_data_raw = data | ((ret & 0xff) << 8);
369
370 return 0;
371}
372
373/* Calculate correction value which contains chip and device specific parts */
374static u32 bh1770_get_corr_value(struct bh1770_chip *chip)
375{
376 u32 tmp;
377 /* Impact of glass attenuation correction */
378 tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE;
379 /* Impact of chip factor correction */
380 tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE;
381 /* Impact of Device specific calibration correction */
382 tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER;
383 return tmp;
384}
385
386static int bh1770_lux_read_result(struct bh1770_chip *chip)
387{
388 bh1770_lux_get_result(chip);
389 return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw);
390}
391
392/*
393 * Chip on / off functions are called while keeping mutex except probe
394 * or remove phase
395 */
396static int bh1770_chip_on(struct bh1770_chip *chip)
397{
398 int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
399 chip->regs);
400 if (ret < 0)
401 return ret;
402
403 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
404
405 /* Reset the chip */
406 i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL,
407 BH1770_SWRESET);
408 usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2);
409
410 /*
411 * ALS is started always since proximity needs als results
412 * for realibility estimation.
413 * Let's assume dark until the first ALS measurement is ready.
414 */
415 chip->lux_data_raw = 0;
416 chip->prox_data = 0;
417 ret = i2c_smbus_write_byte_data(chip->client,
418 BH1770_ALS_CONTROL, BH1770_STANDALONE);
419
420 /* Assume reset defaults */
421 chip->lux_thres_hi_onchip = BH1770_LUX_RANGE;
422 chip->lux_thres_lo_onchip = 0;
423
424 return ret;
425}
426
427static void bh1770_chip_off(struct bh1770_chip *chip)
428{
429 i2c_smbus_write_byte_data(chip->client,
430 BH1770_INTERRUPT, BH1770_DISABLE);
431 i2c_smbus_write_byte_data(chip->client,
432 BH1770_ALS_CONTROL, BH1770_STANDBY);
433 i2c_smbus_write_byte_data(chip->client,
434 BH1770_PS_CONTROL, BH1770_STANDBY);
435 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
436}
437
438/* chip->mutex is kept when this is called */
439static int bh1770_prox_mode_control(struct bh1770_chip *chip)
440{
441 if (chip->prox_enable_count) {
442 chip->prox_force_update = true; /* Force immediate update */
443
444 bh1770_lux_rate(chip, chip->lux_rate_index);
445 bh1770_prox_set_threshold(chip);
446 bh1770_led_cfg(chip);
447 bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD);
448 bh1770_prox_interrupt_control(chip, BH1770_ENABLE);
449 i2c_smbus_write_byte_data(chip->client,
450 BH1770_PS_CONTROL, BH1770_STANDALONE);
451 } else {
452 chip->prox_data = 0;
453 bh1770_lux_rate(chip, chip->lux_rate_index);
454 bh1770_prox_interrupt_control(chip, BH1770_DISABLE);
455 i2c_smbus_write_byte_data(chip->client,
456 BH1770_PS_CONTROL, BH1770_STANDBY);
457 }
458 return 0;
459}
460
461/* chip->mutex is kept when this is called */
462static int bh1770_prox_read_result(struct bh1770_chip *chip)
463{
464 int ret;
465 bool above;
466 u8 mode;
467
468 ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1);
469 if (ret < 0)
470 goto out;
471
472 if (ret > chip->prox_threshold_hw)
473 above = true;
474 else
475 above = false;
476
477 /*
478 * when ALS levels goes above limit, proximity result may be
479 * false proximity. Thus ignore the result. With real proximity
480 * there is a shadow causing low als levels.
481 */
482 if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT)
483 ret = 0;
484
485 chip->prox_data = bh1770_psraw_to_adjusted(chip, ret);
486
487 /* Strong proximity level or force mode requires immediate response */
488 if (chip->prox_data >= chip->prox_abs_thres ||
489 chip->prox_force_update)
490 chip->prox_persistence_counter = chip->prox_persistence;
491
492 chip->prox_force_update = false;
493
494 /* Persistence filttering to reduce false proximity events */
495 if (likely(above)) {
496 if (chip->prox_persistence_counter < chip->prox_persistence) {
497 chip->prox_persistence_counter++;
498 ret = -ENODATA;
499 } else {
500 mode = PROX_ABOVE_THRESHOLD;
501 ret = 0;
502 }
503 } else {
504 chip->prox_persistence_counter = 0;
505 mode = PROX_BELOW_THRESHOLD;
506 chip->prox_data = 0;
507 ret = 0;
508 }
509
510 /* Set proximity detection rate based on above or below value */
511 if (ret == 0) {
512 bh1770_prox_rate(chip, mode);
513 sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw");
514 }
515out:
516 return ret;
517}
518
519static int bh1770_detect(struct bh1770_chip *chip)
520{
521 struct i2c_client *client = chip->client;
522 s32 ret;
523 u8 manu, part;
524
525 ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID);
526 if (ret < 0)
527 goto error;
528 manu = (u8)ret;
529
530 ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID);
531 if (ret < 0)
532 goto error;
533 part = (u8)ret;
534
535 chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT;
536 chip->prox_coef = BH1770_COEF_SCALER;
537 chip->prox_const = 0;
538 chip->lux_cf = BH1770_NEUTRAL_CF;
539
540 if ((manu == BH1770_MANUFACT_ROHM) &&
541 ((part & BH1770_PART_MASK) == BH1770_PART)) {
542 snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC");
543 return 0;
544 }
545
546 if ((manu == BH1770_MANUFACT_OSRAM) &&
547 ((part & BH1770_PART_MASK) == BH1770_PART)) {
548 snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770");
549 /* Values selected by comparing different versions */
550 chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */
551 chip->prox_const = 40;
552 return 0;
553 }
554
555 ret = -ENODEV;
556error:
557 dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n");
558
559 return ret;
560}
561
562/*
563 * This work is re-scheduled at every proximity interrupt.
564 * If this work is running, it means that there hasn't been any
565 * proximity interrupt in time. Situation is handled as no-proximity.
566 * It would be nice to have low-threshold interrupt or interrupt
567 * when measurement and hi-threshold are both 0. But neither of those exists.
568 * This is a workaroud for missing HW feature.
569 */
570
571static void bh1770_prox_work(struct work_struct *work)
572{
573 struct bh1770_chip *chip =
574 container_of(work, struct bh1770_chip, prox_work.work);
575
576 mutex_lock(&chip->mutex);
577 bh1770_prox_read_result(chip);
578 mutex_unlock(&chip->mutex);
579}
580
581/* This is threaded irq handler */
582static irqreturn_t bh1770_irq(int irq, void *data)
583{
584 struct bh1770_chip *chip = data;
585 int status;
586 int rate = 0;
587
588 mutex_lock(&chip->mutex);
589 status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS);
590
591 /* Acknowledge interrupt by reading this register */
592 i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT);
593
594 /*
595 * Check if there is fresh data available for als.
596 * If this is the very first data, update thresholds after that.
597 */
598 if (status & BH1770_INT_ALS_DATA) {
599 bh1770_lux_get_result(chip);
600 if (unlikely(chip->lux_wait_result)) {
601 chip->lux_wait_result = false;
602 wake_up(&chip->wait);
603 bh1770_lux_update_thresholds(chip,
604 chip->lux_threshold_hi,
605 chip->lux_threshold_lo);
606 }
607 }
608
609 /* Disable interrupt logic to guarantee acknowledgement */
610 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
611 (0 << 1) | (0 << 0));
612
613 if ((status & BH1770_INT_ALS_INT))
614 sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input");
615
616 if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) {
617 rate = prox_rates_ms[chip->prox_rate_threshold];
618 bh1770_prox_read_result(chip);
619 }
620
621 /* Re-enable interrupt logic */
622 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
623 (chip->int_mode_lux << 1) |
624 (chip->int_mode_prox << 0));
625 mutex_unlock(&chip->mutex);
626
627 /*
628 * Can't cancel work while keeping mutex since the work uses the
629 * same mutex.
630 */
631 if (rate) {
632 /*
633 * Simulate missing no-proximity interrupt 50ms after the
634 * next expected interrupt time.
635 */
636 cancel_delayed_work_sync(&chip->prox_work);
637 schedule_delayed_work(&chip->prox_work,
638 msecs_to_jiffies(rate + 50));
639 }
640 return IRQ_HANDLED;
641}
642
643static ssize_t bh1770_power_state_store(struct device *dev,
644 struct device_attribute *attr,
645 const char *buf, size_t count)
646{
647 struct bh1770_chip *chip = dev_get_drvdata(dev);
648 unsigned long value;
aec04288 649 ssize_t ret;
190420ab 650
f7b41276
JH		 651 ret = kstrtoul(buf, 0, &value);
652 if (ret)
653 return ret;
190420ab
SO		 654
655 mutex_lock(&chip->mutex);
656 if (value) {
657 pm_runtime_get_sync(dev);
658
659 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
aec04288
DC		 660 if (ret < 0) {
661 pm_runtime_put(dev);
662 goto leave;
663 }
190420ab 664
aec04288 665 ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
190420ab
SO		 666 if (ret < 0) {
667 pm_runtime_put(dev);
668 goto leave;
669 }
670
671 /* This causes interrupt after the next measurement cycle */
672 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
673 BH1770_LUX_DEF_THRES);
674 /* Inform that we are waiting for a result from ALS */
675 chip->lux_wait_result = true;
676 bh1770_prox_mode_control(chip);
677 } else if (!pm_runtime_suspended(dev)) {
678 pm_runtime_put(dev);
679 }
680 ret = count;
681leave:
682 mutex_unlock(&chip->mutex);
683 return ret;
684}
685
686static ssize_t bh1770_power_state_show(struct device *dev,
687 struct device_attribute *attr, char *buf)
688{
689 return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
690}
691
692static ssize_t bh1770_lux_result_show(struct device *dev,
693 struct device_attribute *attr, char *buf)
694{
695 struct bh1770_chip *chip = dev_get_drvdata(dev);
696 ssize_t ret;
697 long timeout;
698
699 if (pm_runtime_suspended(dev))
700 return -EIO; /* Chip is not enabled at all */
701
702 timeout = wait_event_interruptible_timeout(chip->wait,
703 !chip->lux_wait_result,
704 msecs_to_jiffies(BH1770_TIMEOUT));
705 if (!timeout)
706 return -EIO;
707
708 mutex_lock(&chip->mutex);
709 ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip));
710 mutex_unlock(&chip->mutex);
711
712 return ret;
713}
714
715static ssize_t bh1770_lux_range_show(struct device *dev,
716 struct device_attribute *attr, char *buf)
717{
718 return sprintf(buf, "%d\n", BH1770_LUX_RANGE);
719}
720
721static ssize_t bh1770_prox_enable_store(struct device *dev,
722 struct device_attribute *attr,
723 const char *buf, size_t count)
724{
725 struct bh1770_chip *chip = dev_get_drvdata(dev);
726 unsigned long value;
f7b41276 727 int ret;
190420ab 728
f7b41276
JH		 729 ret = kstrtoul(buf, 0, &value);
730 if (ret)
731 return ret;
190420ab
SO		 732
733 mutex_lock(&chip->mutex);
734 /* Assume no proximity. Sensor will tell real state soon */
735 if (!chip->prox_enable_count)
736 chip->prox_data = 0;
737
738 if (value)
739 chip->prox_enable_count++;
740 else if (chip->prox_enable_count > 0)
741 chip->prox_enable_count--;
742 else
743 goto leave;
744
745 /* Run control only when chip is powered on */
746 if (!pm_runtime_suspended(dev))
747 bh1770_prox_mode_control(chip);
748leave:
749 mutex_unlock(&chip->mutex);
750 return count;
751}
752
753static ssize_t bh1770_prox_enable_show(struct device *dev,
754 struct device_attribute *attr, char *buf)
755{
756 struct bh1770_chip *chip = dev_get_drvdata(dev);
757 ssize_t len;
758
759 mutex_lock(&chip->mutex);
760 len = sprintf(buf, "%d\n", chip->prox_enable_count);
761 mutex_unlock(&chip->mutex);
762 return len;
763}
764
765static ssize_t bh1770_prox_result_show(struct device *dev,
766 struct device_attribute *attr, char *buf)
767{
768 struct bh1770_chip *chip = dev_get_drvdata(dev);
769 ssize_t ret;
770
771 mutex_lock(&chip->mutex);
772 if (chip->prox_enable_count && !pm_runtime_suspended(dev))
773 ret = sprintf(buf, "%d\n", chip->prox_data);
774 else
775 ret = -EIO;
776 mutex_unlock(&chip->mutex);
777 return ret;
778}
779
780static ssize_t bh1770_prox_range_show(struct device *dev,
781 struct device_attribute *attr, char *buf)
782{
783 return sprintf(buf, "%d\n", BH1770_PROX_RANGE);
784}
785
786static ssize_t bh1770_get_prox_rate_avail(struct device *dev,
787 struct device_attribute *attr, char *buf)
788{
789 int i;
790 int pos = 0;
791 for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++)
792 pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]);
793 sprintf(buf + pos - 1, "\n");
794 return pos;
795}
796
797static ssize_t bh1770_get_prox_rate_above(struct device *dev,
798 struct device_attribute *attr, char *buf)
799{
800 struct bh1770_chip *chip = dev_get_drvdata(dev);
801 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]);
802}
803
804static ssize_t bh1770_get_prox_rate_below(struct device *dev,
805 struct device_attribute *attr, char *buf)
806{
807 struct bh1770_chip *chip = dev_get_drvdata(dev);
808 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]);
809}
810
811static int bh1770_prox_rate_validate(int rate)
812{
813 int i;
814
815 for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++)
816 if (rate >= prox_rates_hz[i])
817 break;
818 return i;
819}
820
821static ssize_t bh1770_set_prox_rate_above(struct device *dev,
822 struct device_attribute *attr,
823 const char *buf, size_t count)
824{
825 struct bh1770_chip *chip = dev_get_drvdata(dev);
826 unsigned long value;
f7b41276 827 int ret;
190420ab 828
f7b41276
JH		 829 ret = kstrtoul(buf, 0, &value);
830 if (ret)
831 return ret;
190420ab
SO		 832
833 mutex_lock(&chip->mutex);
834 chip->prox_rate_threshold = bh1770_prox_rate_validate(value);
835 mutex_unlock(&chip->mutex);
836 return count;
837}
838
839static ssize_t bh1770_set_prox_rate_below(struct device *dev,
840 struct device_attribute *attr,
841 const char *buf, size_t count)
842{
843 struct bh1770_chip *chip = dev_get_drvdata(dev);
844 unsigned long value;
f7b41276 845 int ret;
190420ab 846
f7b41276
JH		 847 ret = kstrtoul(buf, 0, &value);
848 if (ret)
849 return ret;
190420ab
SO		 850
851 mutex_lock(&chip->mutex);
852 chip->prox_rate = bh1770_prox_rate_validate(value);
853 mutex_unlock(&chip->mutex);
854 return count;
855}
856
857static ssize_t bh1770_get_prox_thres(struct device *dev,
858 struct device_attribute *attr, char *buf)
859{
860 struct bh1770_chip *chip = dev_get_drvdata(dev);
861 return sprintf(buf, "%d\n", chip->prox_threshold);
862}
863
864static ssize_t bh1770_set_prox_thres(struct device *dev,
865 struct device_attribute *attr,
866 const char *buf, size_t count)
867{
868 struct bh1770_chip *chip = dev_get_drvdata(dev);
869 unsigned long value;
870 int ret;
871
f7b41276
JH		 872 ret = kstrtoul(buf, 0, &value);
873 if (ret)
874 return ret;
875
190420ab
SO		 876 if (value > BH1770_PROX_RANGE)
877 return -EINVAL;
878
879 mutex_lock(&chip->mutex);
880 chip->prox_threshold = value;
881 ret = bh1770_prox_set_threshold(chip);
882 mutex_unlock(&chip->mutex);
883 if (ret < 0)
884 return ret;
885 return count;
886}
887
888static ssize_t bh1770_prox_persistence_show(struct device *dev,
889 struct device_attribute *attr, char *buf)
890{
891 struct bh1770_chip *chip = dev_get_drvdata(dev);
892
893 return sprintf(buf, "%u\n", chip->prox_persistence);
894}
895
896static ssize_t bh1770_prox_persistence_store(struct device *dev,
897 struct device_attribute *attr,
898 const char *buf, size_t len)
899{
900 struct bh1770_chip *chip = dev_get_drvdata(dev);
901 unsigned long value;
f7b41276 902 int ret;
190420ab 903
f7b41276
JH		 904 ret = kstrtoul(buf, 0, &value);
905 if (ret)
906 return ret;
190420ab
SO		 907
908 if (value > BH1770_PROX_MAX_PERSISTENCE)
909 return -EINVAL;
910
911 chip->prox_persistence = value;
912
913 return len;
914}
915
916static ssize_t bh1770_prox_abs_thres_show(struct device *dev,
917 struct device_attribute *attr, char *buf)
918{
919 struct bh1770_chip *chip = dev_get_drvdata(dev);
920 return sprintf(buf, "%u\n", chip->prox_abs_thres);
921}
922
923static ssize_t bh1770_prox_abs_thres_store(struct device *dev,
924 struct device_attribute *attr,
925 const char *buf, size_t len)
926{
927 struct bh1770_chip *chip = dev_get_drvdata(dev);
928 unsigned long value;
f7b41276 929 int ret;
190420ab 930
f7b41276
JH		 931 ret = kstrtoul(buf, 0, &value);
932 if (ret)
933 return ret;
190420ab
SO		 934
935 if (value > BH1770_PROX_RANGE)
936 return -EINVAL;
937
938 chip->prox_abs_thres = value;
939
940 return len;
941}
942
943static ssize_t bh1770_chip_id_show(struct device *dev,
944 struct device_attribute *attr, char *buf)
945{
946 struct bh1770_chip *chip = dev_get_drvdata(dev);
947 return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision);
948}
949
950static ssize_t bh1770_lux_calib_default_show(struct device *dev,
951 struct device_attribute *attr, char *buf)
952{
953 return sprintf(buf, "%u\n", BH1770_CALIB_SCALER);
954}
955
956static ssize_t bh1770_lux_calib_show(struct device *dev,
957 struct device_attribute *attr, char *buf)
958{
959 struct bh1770_chip *chip = dev_get_drvdata(dev);
960 ssize_t len;
961
962 mutex_lock(&chip->mutex);
963 len = sprintf(buf, "%u\n", chip->lux_calib);
964 mutex_unlock(&chip->mutex);
965 return len;
966}
967
968static ssize_t bh1770_lux_calib_store(struct device *dev,
969 struct device_attribute *attr,
970 const char *buf, size_t len)
971{
972 struct bh1770_chip *chip = dev_get_drvdata(dev);
973 unsigned long value;
974 u32 old_calib;
975 u32 new_corr;
f7b41276 976 int ret;
190420ab 977
f7b41276
JH		 978 ret = kstrtoul(buf, 0, &value);
979 if (ret)
980 return ret;
190420ab
SO		 981
982 mutex_lock(&chip->mutex);
983 old_calib = chip->lux_calib;
984 chip->lux_calib = value;
985 new_corr = bh1770_get_corr_value(chip);
986 if (new_corr == 0) {
987 chip->lux_calib = old_calib;
988 mutex_unlock(&chip->mutex);
989 return -EINVAL;
990 }
991 chip->lux_corr = new_corr;
992 /* Refresh thresholds on HW after changing correction value */
993 bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi,
994 chip->lux_threshold_lo);
995
996 mutex_unlock(&chip->mutex);
997
998 return len;
999}
1000
1001static ssize_t bh1770_get_lux_rate_avail(struct device *dev,
1002 struct device_attribute *attr, char *buf)
1003{
1004 int i;
1005 int pos = 0;
1006 for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++)
1007 pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]);
1008 sprintf(buf + pos - 1, "\n");
1009 return pos;
1010}
1011
1012static ssize_t bh1770_get_lux_rate(struct device *dev,
1013 struct device_attribute *attr, char *buf)
1014{
1015 struct bh1770_chip *chip = dev_get_drvdata(dev);
1016 return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]);
1017}
1018
1019static ssize_t bh1770_set_lux_rate(struct device *dev,
1020 struct device_attribute *attr,
1021 const char *buf, size_t count)
1022{
1023 struct bh1770_chip *chip = dev_get_drvdata(dev);
1024 unsigned long rate_hz;
1025 int ret, i;
1026
f7b41276
JH		 1027 ret = kstrtoul(buf, 0, &rate_hz);
1028 if (ret)
1029 return ret;
190420ab
SO		 1030
1031 for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++)
1032 if (rate_hz >= lux_rates_hz[i])
1033 break;
1034
1035 mutex_lock(&chip->mutex);
1036 chip->lux_rate_index = i;
1037 ret = bh1770_lux_rate(chip, i);
1038 mutex_unlock(&chip->mutex);
1039
1040 if (ret < 0)
1041 return ret;
1042
1043 return count;
1044}
1045
1046static ssize_t bh1770_get_lux_thresh_above(struct device *dev,
1047 struct device_attribute *attr, char *buf)
1048{
1049 struct bh1770_chip *chip = dev_get_drvdata(dev);
1050 return sprintf(buf, "%d\n", chip->lux_threshold_hi);
1051}
1052
1053static ssize_t bh1770_get_lux_thresh_below(struct device *dev,
1054 struct device_attribute *attr, char *buf)
1055{
1056 struct bh1770_chip *chip = dev_get_drvdata(dev);
1057 return sprintf(buf, "%d\n", chip->lux_threshold_lo);
1058}
1059
1060static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target,
1061 const char *buf)
1062{
190420ab 1063 unsigned long thresh;
f7b41276 1064 int ret;
190420ab 1065
f7b41276
JH		 1066 ret = kstrtoul(buf, 0, &thresh);
1067 if (ret)
1068 return ret;
190420ab
SO		 1069
1070 if (thresh > BH1770_LUX_RANGE)
1071 return -EINVAL;
1072
1073 mutex_lock(&chip->mutex);
1074 *target = thresh;
1075 /*
1076 * Don't update values in HW if we are still waiting for
1077 * first interrupt to come after device handle open call.
1078 */
1079 if (!chip->lux_wait_result)
1080 ret = bh1770_lux_update_thresholds(chip,
1081 chip->lux_threshold_hi,
1082 chip->lux_threshold_lo);
1083 mutex_unlock(&chip->mutex);
1084 return ret;
1085
1086}
1087
1088static ssize_t bh1770_set_lux_thresh_above(struct device *dev,
1089 struct device_attribute *attr,
1090 const char *buf, size_t len)
1091{
1092 struct bh1770_chip *chip = dev_get_drvdata(dev);
1093 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf);
1094 if (ret < 0)
1095 return ret;
1096 return len;
1097}
1098
1099static ssize_t bh1770_set_lux_thresh_below(struct device *dev,
1100 struct device_attribute *attr,
1101 const char *buf, size_t len)
1102{
1103 struct bh1770_chip *chip = dev_get_drvdata(dev);
1104 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf);
1105 if (ret < 0)
1106 return ret;
1107 return len;
1108}
1109
1110static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show,
1111 bh1770_prox_enable_store);
1112static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR,
1113 bh1770_prox_abs_thres_show,
1114 bh1770_prox_abs_thres_store);
1115static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR,
1116 bh1770_get_prox_thres,
1117 bh1770_set_prox_thres);
1118static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL);
1119static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL);
1120static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR,
1121 bh1770_prox_persistence_show,
1122 bh1770_prox_persistence_store);
1123static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR,
1124 bh1770_get_prox_rate_above,
1125 bh1770_set_prox_rate_above);
1126static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR,
1127 bh1770_get_prox_rate_below,
1128 bh1770_set_prox_rate_below);
1129static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL);
1130
1131static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show,
1132 bh1770_lux_calib_store);
1133static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
1134 bh1770_lux_calib_default_show,
1135 NULL);
1136static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL);
1137static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL);
1138static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate,
1139 bh1770_set_lux_rate);
1140static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL);
1141static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
1142 bh1770_get_lux_thresh_above,
1143 bh1770_set_lux_thresh_above);
1144static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
1145 bh1770_get_lux_thresh_below,
1146 bh1770_set_lux_thresh_below);
1147static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL);
1148static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show,
1149 bh1770_power_state_store);
1150
1151
1152static struct attribute *sysfs_attrs[] = {
1153 &dev_attr_lux0_calibscale.attr,
1154 &dev_attr_lux0_calibscale_default.attr,
1155 &dev_attr_lux0_input.attr,
1156 &dev_attr_lux0_sensor_range.attr,
1157 &dev_attr_lux0_rate.attr,
1158 &dev_attr_lux0_rate_avail.attr,
1159 &dev_attr_lux0_thresh_above_value.attr,
1160 &dev_attr_lux0_thresh_below_value.attr,
1161 &dev_attr_prox0_raw.attr,
1162 &dev_attr_prox0_sensor_range.attr,
1163 &dev_attr_prox0_raw_en.attr,
1164 &dev_attr_prox0_thresh_above_count.attr,
1165 &dev_attr_prox0_rate_above.attr,
1166 &dev_attr_prox0_rate_below.attr,
1167 &dev_attr_prox0_rate_avail.attr,
1168 &dev_attr_prox0_thresh_above0_value.attr,
1169 &dev_attr_prox0_thresh_above1_value.attr,
1170 &dev_attr_chip_id.attr,
1171 &dev_attr_power_state.attr,
1172 NULL
1173};
1174
0690ee2b 1175static const struct attribute_group bh1770_attribute_group = {
190420ab
SO		 1176 .attrs = sysfs_attrs
1177};
1178
80c8ae28 1179static int bh1770_probe(struct i2c_client *client,
190420ab
SO		 1180 const struct i2c_device_id *id)
1181{
1182 struct bh1770_chip *chip;
1183 int err;
1184
4734e390 1185 chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL);
190420ab
SO		 1186 if (!chip)
1187 return -ENOMEM;
1188
1189 i2c_set_clientdata(client, chip);
1190 chip->client = client;
1191
1192 mutex_init(&chip->mutex);
1193 init_waitqueue_head(&chip->wait);
1194 INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work);
1195
1196 if (client->dev.platform_data == NULL) {
1197 dev_err(&client->dev, "platform data is mandatory\n");
4734e390 1198 return -EINVAL;
190420ab
SO		 1199 }
1200
1201 chip->pdata = client->dev.platform_data;
1202 chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE;
1203 chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE;
1204 chip->lux_threshold_lo = BH1770_LUX_DEF_THRES;
1205 chip->lux_threshold_hi = BH1770_LUX_DEF_THRES;
1206
1207 if (chip->pdata->glass_attenuation == 0)
1208 chip->lux_ga = BH1770_NEUTRAL_GA;
1209 else
1210 chip->lux_ga = chip->pdata->glass_attenuation;
1211
1212 chip->prox_threshold = BH1770_PROX_DEF_THRES;
1213 chip->prox_led = chip->pdata->led_def_curr;
1214 chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES;
1215 chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE;
1216 chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH;
1217 chip->prox_rate = BH1770_PROX_DEFAULT_RATE;
1218 chip->prox_data = 0;
1219
1220 chip->regs[0].supply = reg_vcc;
1221 chip->regs[1].supply = reg_vleds;
1222
4734e390
HS		 1223 err = devm_regulator_bulk_get(&client->dev,
1224 ARRAY_SIZE(chip->regs), chip->regs);
190420ab
SO		 1225 if (err < 0) {
1226 dev_err(&client->dev, "Cannot get regulators\n");
4734e390 1227 return err;
190420ab
SO		 1228 }
1229
1230 err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
1231 chip->regs);
1232 if (err < 0) {
1233 dev_err(&client->dev, "Cannot enable regulators\n");
4734e390 1234 return err;
190420ab
SO		 1235 }
1236
1237 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
1238 err = bh1770_detect(chip);
1239 if (err < 0)
4734e390 1240 goto fail0;
190420ab
SO		 1241
1242 /* Start chip */
1243 bh1770_chip_on(chip);
1244 pm_runtime_set_active(&client->dev);
1245 pm_runtime_enable(&client->dev);
1246
1247 chip->lux_corr = bh1770_get_corr_value(chip);
1248 if (chip->lux_corr == 0) {
1249 dev_err(&client->dev, "Improper correction values\n");
1250 err = -EINVAL;
4734e390 1251 goto fail0;
190420ab
SO		 1252 }
1253
1254 if (chip->pdata->setup_resources) {
1255 err = chip->pdata->setup_resources();
1256 if (err) {
1257 err = -EINVAL;
4734e390 1258 goto fail0;
190420ab
SO		 1259 }
1260 }
1261
1262 err = sysfs_create_group(&chip->client->dev.kobj,
1263 &bh1770_attribute_group);
1264 if (err < 0) {
1265 dev_err(&chip->client->dev, "Sysfs registration failed\n");
4734e390 1266 goto fail1;
190420ab
SO		 1267 }
1268
1269 /*
1270 * Chip needs level triggered interrupt to work. However,
1271 * level triggering doesn't work always correctly with power
1272 * management. Select both
1273 */
1274 err = request_threaded_irq(client->irq, NULL,
1275 bh1770_irq,
1276 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
1277 IRQF_TRIGGER_LOW,
1278 "bh1770", chip);
1279 if (err) {
1280 dev_err(&client->dev, "could not get IRQ %d\n",
1281 client->irq);
4734e390 1282 goto fail2;
190420ab
SO		 1283 }
1284 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1285 return err;
4734e390 1286fail2:
190420ab
SO		 1287 sysfs_remove_group(&chip->client->dev.kobj,
1288 &bh1770_attribute_group);
4734e390 1289fail1:
190420ab
SO		 1290 if (chip->pdata->release_resources)
1291 chip->pdata->release_resources();
4734e390 1292fail0:
190420ab 1293 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
190420ab
SO		 1294 return err;
1295}
1296
486a5c28 1297static int bh1770_remove(struct i2c_client *client)
190420ab
SO		 1298{
1299 struct bh1770_chip *chip = i2c_get_clientdata(client);
1300
1301 free_irq(client->irq, chip);
1302
1303 sysfs_remove_group(&chip->client->dev.kobj,
1304 &bh1770_attribute_group);
1305
1306 if (chip->pdata->release_resources)
1307 chip->pdata->release_resources();
1308
1309 cancel_delayed_work_sync(&chip->prox_work);
1310
1311 if (!pm_runtime_suspended(&client->dev))
1312 bh1770_chip_off(chip);
1313
1314 pm_runtime_disable(&client->dev);
1315 pm_runtime_set_suspended(&client->dev);
1316
190420ab
SO		 1317 return 0;
1318}
1319
0ca19d6f 1320#ifdef CONFIG_PM_SLEEP
190420ab
SO		 1321static int bh1770_suspend(struct device *dev)
1322{
8c99d8e6 1323 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1324 struct bh1770_chip *chip = i2c_get_clientdata(client);
1325
1326 bh1770_chip_off(chip);
1327
1328 return 0;
1329}
1330
1331static int bh1770_resume(struct device *dev)
1332{
8c99d8e6 1333 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1334 struct bh1770_chip *chip = i2c_get_clientdata(client);
1335 int ret = 0;
1336
1337 bh1770_chip_on(chip);
1338
1339 if (!pm_runtime_suspended(dev)) {
1340 /*
1341 * If we were enabled at suspend time, it is expected
1342 * everything works nice and smoothly
1343 */
1344 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
1345 ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
1346
1347 /* This causes interrupt after the next measurement cycle */
1348 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
1349 BH1770_LUX_DEF_THRES);
1350 /* Inform that we are waiting for a result from ALS */
1351 chip->lux_wait_result = true;
1352 bh1770_prox_mode_control(chip);
1353 }
1354 return ret;
1355}
190420ab
SO		 1356#endif
1357
bbd6d050 1358#ifdef CONFIG_PM
190420ab
SO		 1359static int bh1770_runtime_suspend(struct device *dev)
1360{
8c99d8e6 1361 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1362 struct bh1770_chip *chip = i2c_get_clientdata(client);
1363
1364 bh1770_chip_off(chip);
1365
1366 return 0;
1367}
1368
1369static int bh1770_runtime_resume(struct device *dev)
1370{
8c99d8e6 1371 struct i2c_client *client = to_i2c_client(dev);
190420ab
SO		 1372 struct bh1770_chip *chip = i2c_get_clientdata(client);
1373
1374 bh1770_chip_on(chip);
1375
1376 return 0;
1377}
1378#endif
1379
1380static const struct i2c_device_id bh1770_id[] = {
1381 {"bh1770glc", 0 },
1382 {"sfh7770", 0 },
1383 {}
1384};
1385
1386MODULE_DEVICE_TABLE(i2c, bh1770_id);
1387
1388static const struct dev_pm_ops bh1770_pm_ops = {
1389 SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume)
1390 SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL)
1391};
1392
1393static struct i2c_driver bh1770_driver = {
1394 .driver = {
1395 .name = "bh1770glc",
190420ab
SO		 1396 .pm = &bh1770_pm_ops,
1397 },
1398 .probe = bh1770_probe,
2d6bed9c 1399 .remove = bh1770_remove,
190420ab
SO		 1400 .id_table = bh1770_id,
1401};
1402
a64fe2ed 1403module_i2c_driver(bh1770_driver);
190420ab
SO		 1404
1405MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor");
1406MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
1407MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)