misc: nct1008: change overheat enable message
[linux-3.10.git] / drivers / misc / bh1770glc.c
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>
30 #include <linux/i2c/bh1770glc.h>
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
134 struct 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
173 static const char reg_vcc[] = "Vcc";
174 static 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  */
180 static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
181 static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
182
183 /* Supported IR-led currents in mA */
184 static const u8 prox_curr_ma[] = {5, 10, 20, 50, 100, 150, 200};
185
186 /*
187  * Supported stand alone rates in ms from chip data sheet
188  * {100, 200, 500, 1000, 2000};
189  */
190 static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0};
191
192 /*
193  * interrupt control functions are called while keeping chip->mutex
194  * excluding module probe / remove
195  */
196 static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip,
197                                         int lux)
198 {
199         chip->int_mode_lux = lux;
200         /* Set interrupt modes, interrupt active low, latched */
201         return i2c_smbus_write_byte_data(chip->client,
202                                         BH1770_INTERRUPT,
203                                         (lux << 1) | chip->int_mode_prox);
204 }
205
206 static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip,
207                                         int ps)
208 {
209         chip->int_mode_prox = ps;
210         return i2c_smbus_write_byte_data(chip->client,
211                                         BH1770_INTERRUPT,
212                                         (chip->int_mode_lux << 1) | (ps << 0));
213 }
214
215 /* chip->mutex is always kept here */
216 static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index)
217 {
218         /* sysfs may call this when the chip is powered off */
219         if (pm_runtime_suspended(&chip->client->dev))
220                 return 0;
221
222         /* Proper proximity response needs fastest lux rate (100ms) */
223         if (chip->prox_enable_count)
224                 rate_index = 0;
225
226         return i2c_smbus_write_byte_data(chip->client,
227                                         BH1770_ALS_MEAS_RATE,
228                                         rate_index);
229 }
230
231 static int bh1770_prox_rate(struct bh1770_chip *chip, int mode)
232 {
233         int rate;
234
235         rate = (mode == PROX_ABOVE_THRESHOLD) ?
236                 chip->prox_rate_threshold : chip->prox_rate;
237
238         return i2c_smbus_write_byte_data(chip->client,
239                                         BH1770_PS_MEAS_RATE,
240                                         rate);
241 }
242
243 /* InfraredLED is controlled by the chip during proximity scanning */
244 static inline int bh1770_led_cfg(struct bh1770_chip *chip)
245 {
246         /* LED cfg, current for leds 1 and 2 */
247         return i2c_smbus_write_byte_data(chip->client,
248                                         BH1770_I_LED,
249                                         (BH1770_LED1 << 6) |
250                                         (BH1770_LED_5mA << 3) |
251                                         chip->prox_led);
252 }
253
254 /*
255  * Following two functions converts raw ps values from HW to normalized
256  * values. Purpose is to compensate differences between different sensor
257  * versions and variants so that result means about the same between
258  * versions.
259  */
260 static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw)
261 {
262         u16 adjusted;
263         adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) /
264                 BH1770_COEF_SCALER);
265         if (adjusted > BH1770_PROX_RANGE)
266                 adjusted = BH1770_PROX_RANGE;
267         return adjusted;
268 }
269
270 static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps)
271 {
272         u16 raw;
273
274         raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef);
275         if (raw > chip->prox_const)
276                 raw = raw - chip->prox_const;
277         else
278                 raw = 0;
279         return raw;
280 }
281
282 /*
283  * Following two functions converts raw lux values from HW to normalized
284  * values. Purpose is to compensate differences between different sensor
285  * versions and variants so that result means about the same between
286  * versions. Chip->mutex is kept when this is called.
287  */
288 static int bh1770_prox_set_threshold(struct bh1770_chip *chip)
289 {
290         u8 tmp = 0;
291
292         /* sysfs may call this when the chip is powered off */
293         if (pm_runtime_suspended(&chip->client->dev))
294                 return 0;
295
296         tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold);
297         chip->prox_threshold_hw = tmp;
298
299         return  i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1,
300                                         tmp);
301 }
302
303 static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw)
304 {
305         u32 lux;
306         lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE;
307         return min(lux, (u32)BH1770_LUX_RANGE);
308 }
309
310 static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip,
311                                         u16 adjusted)
312 {
313         return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr;
314 }
315
316 /* chip->mutex is kept when this is called */
317 static int bh1770_lux_update_thresholds(struct bh1770_chip *chip,
318                                         u16 threshold_hi, u16 threshold_lo)
319 {
320         u8 data[4];
321         int ret;
322
323         /* sysfs may call this when the chip is powered off */
324         if (pm_runtime_suspended(&chip->client->dev))
325                 return 0;
326
327         /*
328          * Compensate threshold values with the correction factors if not
329          * set to minimum or maximum.
330          * Min & max values disables interrupts.
331          */
332         if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0)
333                 threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi);
334
335         if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0)
336                 threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo);
337
338         if (chip->lux_thres_hi_onchip == threshold_hi &&
339             chip->lux_thres_lo_onchip == threshold_lo)
340                 return 0;
341
342         chip->lux_thres_hi_onchip = threshold_hi;
343         chip->lux_thres_lo_onchip = threshold_lo;
344
345         data[0] = threshold_hi;
346         data[1] = threshold_hi >> 8;
347         data[2] = threshold_lo;
348         data[3] = threshold_lo >> 8;
349
350         ret = i2c_smbus_write_i2c_block_data(chip->client,
351                                         BH1770_ALS_TH_UP_0,
352                                         ARRAY_SIZE(data),
353                                         data);
354         return ret;
355 }
356
357 static int bh1770_lux_get_result(struct bh1770_chip *chip)
358 {
359         u16 data;
360         int ret;
361
362         ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0);
363         if (ret < 0)
364                 return ret;
365
366         data = ret & 0xff;
367         ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1);
368         if (ret < 0)
369                 return ret;
370
371         chip->lux_data_raw = data | ((ret & 0xff) << 8);
372
373         return 0;
374 }
375
376 /* Calculate correction value which contains chip and device specific parts */
377 static u32 bh1770_get_corr_value(struct bh1770_chip *chip)
378 {
379         u32 tmp;
380         /* Impact of glass attenuation correction */
381         tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE;
382         /* Impact of chip factor correction */
383         tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE;
384         /* Impact of Device specific calibration correction */
385         tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER;
386         return tmp;
387 }
388
389 static int bh1770_lux_read_result(struct bh1770_chip *chip)
390 {
391         bh1770_lux_get_result(chip);
392         return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw);
393 }
394
395 /*
396  * Chip on / off functions are called while keeping mutex except probe
397  * or remove phase
398  */
399 static int bh1770_chip_on(struct bh1770_chip *chip)
400 {
401         int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
402                                         chip->regs);
403         if (ret < 0)
404                 return ret;
405
406         usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
407
408         /* Reset the chip */
409         i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL,
410                                 BH1770_SWRESET);
411         usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2);
412
413         /*
414          * ALS is started always since proximity needs als results
415          * for realibility estimation.
416          * Let's assume dark until the first ALS measurement is ready.
417          */
418         chip->lux_data_raw = 0;
419         chip->prox_data = 0;
420         ret = i2c_smbus_write_byte_data(chip->client,
421                                         BH1770_ALS_CONTROL, BH1770_STANDALONE);
422
423         /* Assume reset defaults */
424         chip->lux_thres_hi_onchip = BH1770_LUX_RANGE;
425         chip->lux_thres_lo_onchip = 0;
426
427         return ret;
428 }
429
430 static void bh1770_chip_off(struct bh1770_chip *chip)
431 {
432         i2c_smbus_write_byte_data(chip->client,
433                                         BH1770_INTERRUPT, BH1770_DISABLE);
434         i2c_smbus_write_byte_data(chip->client,
435                                 BH1770_ALS_CONTROL, BH1770_STANDBY);
436         i2c_smbus_write_byte_data(chip->client,
437                                 BH1770_PS_CONTROL, BH1770_STANDBY);
438         regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
439 }
440
441 /* chip->mutex is kept when this is called */
442 static int bh1770_prox_mode_control(struct bh1770_chip *chip)
443 {
444         if (chip->prox_enable_count) {
445                 chip->prox_force_update = true; /* Force immediate update */
446
447                 bh1770_lux_rate(chip, chip->lux_rate_index);
448                 bh1770_prox_set_threshold(chip);
449                 bh1770_led_cfg(chip);
450                 bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD);
451                 bh1770_prox_interrupt_control(chip, BH1770_ENABLE);
452                 i2c_smbus_write_byte_data(chip->client,
453                                         BH1770_PS_CONTROL, BH1770_STANDALONE);
454         } else {
455                 chip->prox_data = 0;
456                 bh1770_lux_rate(chip, chip->lux_rate_index);
457                 bh1770_prox_interrupt_control(chip, BH1770_DISABLE);
458                 i2c_smbus_write_byte_data(chip->client,
459                                         BH1770_PS_CONTROL, BH1770_STANDBY);
460         }
461         return 0;
462 }
463
464 /* chip->mutex is kept when this is called */
465 static int bh1770_prox_read_result(struct bh1770_chip *chip)
466 {
467         int ret;
468         bool above;
469         u8 mode;
470
471         ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1);
472         if (ret < 0)
473                 goto out;
474
475         if (ret > chip->prox_threshold_hw)
476                 above = true;
477         else
478                 above = false;
479
480         /*
481          * when ALS levels goes above limit, proximity result may be
482          * false proximity. Thus ignore the result. With real proximity
483          * there is a shadow causing low als levels.
484          */
485         if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT)
486                 ret = 0;
487
488         chip->prox_data = bh1770_psraw_to_adjusted(chip, ret);
489
490         /* Strong proximity level or force mode requires immediate response */
491         if (chip->prox_data >= chip->prox_abs_thres ||
492             chip->prox_force_update)
493                 chip->prox_persistence_counter = chip->prox_persistence;
494
495         chip->prox_force_update = false;
496
497         /* Persistence filttering to reduce false proximity events */
498         if (likely(above)) {
499                 if (chip->prox_persistence_counter < chip->prox_persistence) {
500                         chip->prox_persistence_counter++;
501                         ret = -ENODATA;
502                 } else {
503                         mode = PROX_ABOVE_THRESHOLD;
504                         ret = 0;
505                 }
506         } else {
507                 chip->prox_persistence_counter = 0;
508                 mode = PROX_BELOW_THRESHOLD;
509                 chip->prox_data = 0;
510                 ret = 0;
511         }
512
513         /* Set proximity detection rate based on above or below value */
514         if (ret == 0) {
515                 bh1770_prox_rate(chip, mode);
516                 sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw");
517         }
518 out:
519         return ret;
520 }
521
522 static int bh1770_detect(struct bh1770_chip *chip)
523 {
524         struct i2c_client *client = chip->client;
525         s32 ret;
526         u8 manu, part;
527
528         ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID);
529         if (ret < 0)
530                 goto error;
531         manu = (u8)ret;
532
533         ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID);
534         if (ret < 0)
535                 goto error;
536         part = (u8)ret;
537
538         chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT;
539         chip->prox_coef = BH1770_COEF_SCALER;
540         chip->prox_const = 0;
541         chip->lux_cf = BH1770_NEUTRAL_CF;
542
543         if ((manu == BH1770_MANUFACT_ROHM) &&
544             ((part & BH1770_PART_MASK) == BH1770_PART)) {
545                 snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC");
546                 return 0;
547         }
548
549         if ((manu == BH1770_MANUFACT_OSRAM) &&
550             ((part & BH1770_PART_MASK) == BH1770_PART)) {
551                 snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770");
552                 /* Values selected by comparing different versions */
553                 chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */
554                 chip->prox_const = 40;
555                 return 0;
556         }
557
558         ret = -ENODEV;
559 error:
560         dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n");
561
562         return ret;
563 }
564
565 /*
566  * This work is re-scheduled at every proximity interrupt.
567  * If this work is running, it means that there hasn't been any
568  * proximity interrupt in time. Situation is handled as no-proximity.
569  * It would be nice to have low-threshold interrupt or interrupt
570  * when measurement and hi-threshold are both 0. But neither of those exists.
571  * This is a workaroud for missing HW feature.
572  */
573
574 static void bh1770_prox_work(struct work_struct *work)
575 {
576         struct bh1770_chip *chip =
577                 container_of(work, struct bh1770_chip, prox_work.work);
578
579         mutex_lock(&chip->mutex);
580         bh1770_prox_read_result(chip);
581         mutex_unlock(&chip->mutex);
582 }
583
584 /* This is threaded irq handler */
585 static irqreturn_t bh1770_irq(int irq, void *data)
586 {
587         struct bh1770_chip *chip = data;
588         int status;
589         int rate = 0;
590
591         mutex_lock(&chip->mutex);
592         status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS);
593
594         /* Acknowledge interrupt by reading this register */
595         i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT);
596
597         /*
598          * Check if there is fresh data available for als.
599          * If this is the very first data, update thresholds after that.
600          */
601         if (status & BH1770_INT_ALS_DATA) {
602                 bh1770_lux_get_result(chip);
603                 if (unlikely(chip->lux_wait_result)) {
604                         chip->lux_wait_result = false;
605                         wake_up(&chip->wait);
606                         bh1770_lux_update_thresholds(chip,
607                                                 chip->lux_threshold_hi,
608                                                 chip->lux_threshold_lo);
609                 }
610         }
611
612         /* Disable interrupt logic to guarantee acknowledgement */
613         i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
614                                   (0 << 1) | (0 << 0));
615
616         if ((status & BH1770_INT_ALS_INT))
617                 sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input");
618
619         if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) {
620                 rate = prox_rates_ms[chip->prox_rate_threshold];
621                 bh1770_prox_read_result(chip);
622         }
623
624         /* Re-enable interrupt logic */
625         i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
626                                   (chip->int_mode_lux << 1) |
627                                   (chip->int_mode_prox << 0));
628         mutex_unlock(&chip->mutex);
629
630         /*
631          * Can't cancel work while keeping mutex since the work uses the
632          * same mutex.
633          */
634         if (rate) {
635                 /*
636                  * Simulate missing no-proximity interrupt 50ms after the
637                  * next expected interrupt time.
638                  */
639                 cancel_delayed_work_sync(&chip->prox_work);
640                 schedule_delayed_work(&chip->prox_work,
641                                 msecs_to_jiffies(rate + 50));
642         }
643         return IRQ_HANDLED;
644 }
645
646 static ssize_t bh1770_power_state_store(struct device *dev,
647                                       struct device_attribute *attr,
648                                       const char *buf, size_t count)
649 {
650         struct bh1770_chip *chip =  dev_get_drvdata(dev);
651         unsigned long value;
652         ssize_t ret;
653
654         if (strict_strtoul(buf, 0, &value))
655                 return -EINVAL;
656
657         mutex_lock(&chip->mutex);
658         if (value) {
659                 pm_runtime_get_sync(dev);
660
661                 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
662                 if (ret < 0) {
663                         pm_runtime_put(dev);
664                         goto leave;
665                 }
666
667                 ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
668                 if (ret < 0) {
669                         pm_runtime_put(dev);
670                         goto leave;
671                 }
672
673                 /* This causes interrupt after the next measurement cycle */
674                 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
675                                         BH1770_LUX_DEF_THRES);
676                 /* Inform that we are waiting for a result from ALS */
677                 chip->lux_wait_result = true;
678                 bh1770_prox_mode_control(chip);
679         } else if (!pm_runtime_suspended(dev)) {
680                 pm_runtime_put(dev);
681         }
682         ret = count;
683 leave:
684         mutex_unlock(&chip->mutex);
685         return ret;
686 }
687
688 static ssize_t bh1770_power_state_show(struct device *dev,
689                                    struct device_attribute *attr, char *buf)
690 {
691         return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
692 }
693
694 static ssize_t bh1770_lux_result_show(struct device *dev,
695                                    struct device_attribute *attr, char *buf)
696 {
697         struct bh1770_chip *chip =  dev_get_drvdata(dev);
698         ssize_t ret;
699         long timeout;
700
701         if (pm_runtime_suspended(dev))
702                 return -EIO; /* Chip is not enabled at all */
703
704         timeout = wait_event_interruptible_timeout(chip->wait,
705                                         !chip->lux_wait_result,
706                                         msecs_to_jiffies(BH1770_TIMEOUT));
707         if (!timeout)
708                 return -EIO;
709
710         mutex_lock(&chip->mutex);
711         ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip));
712         mutex_unlock(&chip->mutex);
713
714         return ret;
715 }
716
717 static ssize_t bh1770_lux_range_show(struct device *dev,
718                                    struct device_attribute *attr, char *buf)
719 {
720         return sprintf(buf, "%d\n", BH1770_LUX_RANGE);
721 }
722
723 static ssize_t bh1770_prox_enable_store(struct device *dev,
724                                       struct device_attribute *attr,
725                                       const char *buf, size_t count)
726 {
727         struct bh1770_chip *chip =  dev_get_drvdata(dev);
728         unsigned long value;
729
730         if (strict_strtoul(buf, 0, &value))
731                 return -EINVAL;
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);
748 leave:
749         mutex_unlock(&chip->mutex);
750         return count;
751 }
752
753 static 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
765 static 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
780 static 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
786 static 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
797 static 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
804 static 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
811 static 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
821 static 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;
827
828         if (strict_strtoul(buf, 0, &value))
829                 return -EINVAL;
830
831         mutex_lock(&chip->mutex);
832         chip->prox_rate_threshold = bh1770_prox_rate_validate(value);
833         mutex_unlock(&chip->mutex);
834         return count;
835 }
836
837 static ssize_t bh1770_set_prox_rate_below(struct device *dev,
838                                         struct device_attribute *attr,
839                                         const char *buf, size_t count)
840 {
841         struct bh1770_chip *chip =  dev_get_drvdata(dev);
842         unsigned long value;
843
844         if (strict_strtoul(buf, 0, &value))
845                 return -EINVAL;
846
847         mutex_lock(&chip->mutex);
848         chip->prox_rate = bh1770_prox_rate_validate(value);
849         mutex_unlock(&chip->mutex);
850         return count;
851 }
852
853 static ssize_t bh1770_get_prox_thres(struct device *dev,
854                                    struct device_attribute *attr, char *buf)
855 {
856         struct bh1770_chip *chip =  dev_get_drvdata(dev);
857         return sprintf(buf, "%d\n", chip->prox_threshold);
858 }
859
860 static ssize_t bh1770_set_prox_thres(struct device *dev,
861                                       struct device_attribute *attr,
862                                       const char *buf, size_t count)
863 {
864         struct bh1770_chip *chip =  dev_get_drvdata(dev);
865         unsigned long value;
866         int ret;
867
868         if (strict_strtoul(buf, 0, &value))
869                 return -EINVAL;
870         if (value > BH1770_PROX_RANGE)
871                 return -EINVAL;
872
873         mutex_lock(&chip->mutex);
874         chip->prox_threshold = value;
875         ret = bh1770_prox_set_threshold(chip);
876         mutex_unlock(&chip->mutex);
877         if (ret < 0)
878                 return ret;
879         return count;
880 }
881
882 static ssize_t bh1770_prox_persistence_show(struct device *dev,
883                                  struct device_attribute *attr, char *buf)
884 {
885         struct bh1770_chip *chip = dev_get_drvdata(dev);
886
887         return sprintf(buf, "%u\n", chip->prox_persistence);
888 }
889
890 static ssize_t bh1770_prox_persistence_store(struct device *dev,
891                                 struct device_attribute *attr,
892                                 const char *buf, size_t len)
893 {
894         struct bh1770_chip *chip = dev_get_drvdata(dev);
895         unsigned long value;
896
897         if (strict_strtoul(buf, 0, &value))
898                 return -EINVAL;
899
900         if (value > BH1770_PROX_MAX_PERSISTENCE)
901                 return -EINVAL;
902
903         chip->prox_persistence = value;
904
905         return len;
906 }
907
908 static ssize_t bh1770_prox_abs_thres_show(struct device *dev,
909                                  struct device_attribute *attr, char *buf)
910 {
911         struct bh1770_chip *chip = dev_get_drvdata(dev);
912         return sprintf(buf, "%u\n", chip->prox_abs_thres);
913 }
914
915 static ssize_t bh1770_prox_abs_thres_store(struct device *dev,
916                                 struct device_attribute *attr,
917                                 const char *buf, size_t len)
918 {
919         struct bh1770_chip *chip = dev_get_drvdata(dev);
920         unsigned long value;
921
922         if (strict_strtoul(buf, 0, &value))
923                 return -EINVAL;
924
925         if (value > BH1770_PROX_RANGE)
926                 return -EINVAL;
927
928         chip->prox_abs_thres = value;
929
930         return len;
931 }
932
933 static ssize_t bh1770_chip_id_show(struct device *dev,
934                                    struct device_attribute *attr, char *buf)
935 {
936         struct bh1770_chip *chip =  dev_get_drvdata(dev);
937         return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision);
938 }
939
940 static ssize_t bh1770_lux_calib_default_show(struct device *dev,
941                                  struct device_attribute *attr, char *buf)
942 {
943         return sprintf(buf, "%u\n", BH1770_CALIB_SCALER);
944 }
945
946 static ssize_t bh1770_lux_calib_show(struct device *dev,
947                                  struct device_attribute *attr, char *buf)
948 {
949         struct bh1770_chip *chip = dev_get_drvdata(dev);
950         ssize_t len;
951
952         mutex_lock(&chip->mutex);
953         len = sprintf(buf, "%u\n", chip->lux_calib);
954         mutex_unlock(&chip->mutex);
955         return len;
956 }
957
958 static ssize_t bh1770_lux_calib_store(struct device *dev,
959                                   struct device_attribute *attr,
960                                   const char *buf, size_t len)
961 {
962         struct bh1770_chip *chip = dev_get_drvdata(dev);
963         unsigned long value;
964         u32 old_calib;
965         u32 new_corr;
966
967         if (strict_strtoul(buf, 0, &value))
968                 return -EINVAL;
969
970         mutex_lock(&chip->mutex);
971         old_calib = chip->lux_calib;
972         chip->lux_calib = value;
973         new_corr = bh1770_get_corr_value(chip);
974         if (new_corr == 0) {
975                 chip->lux_calib = old_calib;
976                 mutex_unlock(&chip->mutex);
977                 return -EINVAL;
978         }
979         chip->lux_corr = new_corr;
980         /* Refresh thresholds on HW after changing correction value */
981         bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi,
982                                 chip->lux_threshold_lo);
983
984         mutex_unlock(&chip->mutex);
985
986         return len;
987 }
988
989 static ssize_t bh1770_get_lux_rate_avail(struct device *dev,
990                                    struct device_attribute *attr, char *buf)
991 {
992         int i;
993         int pos = 0;
994         for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++)
995                 pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]);
996         sprintf(buf + pos - 1, "\n");
997         return pos;
998 }
999
1000 static ssize_t bh1770_get_lux_rate(struct device *dev,
1001                                    struct device_attribute *attr, char *buf)
1002 {
1003         struct bh1770_chip *chip =  dev_get_drvdata(dev);
1004         return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]);
1005 }
1006
1007 static ssize_t bh1770_set_lux_rate(struct device *dev,
1008                                       struct device_attribute *attr,
1009                                       const char *buf, size_t count)
1010 {
1011         struct bh1770_chip *chip =  dev_get_drvdata(dev);
1012         unsigned long rate_hz;
1013         int ret, i;
1014
1015         if (strict_strtoul(buf, 0, &rate_hz))
1016                 return -EINVAL;
1017
1018         for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++)
1019                 if (rate_hz >= lux_rates_hz[i])
1020                         break;
1021
1022         mutex_lock(&chip->mutex);
1023         chip->lux_rate_index = i;
1024         ret = bh1770_lux_rate(chip, i);
1025         mutex_unlock(&chip->mutex);
1026
1027         if (ret < 0)
1028                 return ret;
1029
1030         return count;
1031 }
1032
1033 static ssize_t bh1770_get_lux_thresh_above(struct device *dev,
1034                                    struct device_attribute *attr, char *buf)
1035 {
1036         struct bh1770_chip *chip =  dev_get_drvdata(dev);
1037         return sprintf(buf, "%d\n", chip->lux_threshold_hi);
1038 }
1039
1040 static ssize_t bh1770_get_lux_thresh_below(struct device *dev,
1041                                    struct device_attribute *attr, char *buf)
1042 {
1043         struct bh1770_chip *chip =  dev_get_drvdata(dev);
1044         return sprintf(buf, "%d\n", chip->lux_threshold_lo);
1045 }
1046
1047 static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target,
1048                                 const char *buf)
1049 {
1050         int ret = 0;
1051         unsigned long thresh;
1052
1053         if (strict_strtoul(buf, 0, &thresh))
1054                 return -EINVAL;
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
1074 static 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
1085 static 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
1096 static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show,
1097                                                 bh1770_prox_enable_store);
1098 static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR,
1099                                                 bh1770_prox_abs_thres_show,
1100                                                 bh1770_prox_abs_thres_store);
1101 static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR,
1102                                                 bh1770_get_prox_thres,
1103                                                 bh1770_set_prox_thres);
1104 static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL);
1105 static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL);
1106 static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR,
1107                                                 bh1770_prox_persistence_show,
1108                                                 bh1770_prox_persistence_store);
1109 static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR,
1110                                                 bh1770_get_prox_rate_above,
1111                                                 bh1770_set_prox_rate_above);
1112 static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR,
1113                                                 bh1770_get_prox_rate_below,
1114                                                 bh1770_set_prox_rate_below);
1115 static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL);
1116
1117 static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show,
1118                                                 bh1770_lux_calib_store);
1119 static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
1120                                                 bh1770_lux_calib_default_show,
1121                                                 NULL);
1122 static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL);
1123 static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL);
1124 static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate,
1125                                                 bh1770_set_lux_rate);
1126 static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL);
1127 static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
1128                                                 bh1770_get_lux_thresh_above,
1129                                                 bh1770_set_lux_thresh_above);
1130 static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
1131                                                 bh1770_get_lux_thresh_below,
1132                                                 bh1770_set_lux_thresh_below);
1133 static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL);
1134 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show,
1135                                                  bh1770_power_state_store);
1136
1137
1138 static 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
1161 static struct attribute_group bh1770_attribute_group = {
1162         .attrs = sysfs_attrs
1163 };
1164
1165 static int bh1770_probe(struct i2c_client *client,
1166                                 const struct i2c_device_id *id)
1167 {
1168         struct bh1770_chip *chip;
1169         int err;
1170
1171         chip = kzalloc(sizeof *chip, GFP_KERNEL);
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");
1184                 err = -EINVAL;
1185                 goto fail1;
1186         }
1187
1188         chip->pdata             = client->dev.platform_data;
1189         chip->lux_calib         = BH1770_LUX_NEUTRAL_CALIB_VALUE;
1190         chip->lux_rate_index    = BH1770_LUX_DEFAULT_RATE;
1191         chip->lux_threshold_lo  = BH1770_LUX_DEF_THRES;
1192         chip->lux_threshold_hi  = BH1770_LUX_DEF_THRES;
1193
1194         if (chip->pdata->glass_attenuation == 0)
1195                 chip->lux_ga = BH1770_NEUTRAL_GA;
1196         else
1197                 chip->lux_ga = chip->pdata->glass_attenuation;
1198
1199         chip->prox_threshold    = BH1770_PROX_DEF_THRES;
1200         chip->prox_led          = chip->pdata->led_def_curr;
1201         chip->prox_abs_thres    = BH1770_PROX_DEF_ABS_THRES;
1202         chip->prox_persistence  = BH1770_DEFAULT_PERSISTENCE;
1203         chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH;
1204         chip->prox_rate         = BH1770_PROX_DEFAULT_RATE;
1205         chip->prox_data         = 0;
1206
1207         chip->regs[0].supply = reg_vcc;
1208         chip->regs[1].supply = reg_vleds;
1209
1210         err = regulator_bulk_get(&client->dev,
1211                                  ARRAY_SIZE(chip->regs), chip->regs);
1212         if (err < 0) {
1213                 dev_err(&client->dev, "Cannot get regulators\n");
1214                 goto fail1;
1215         }
1216
1217         err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
1218                                 chip->regs);
1219         if (err < 0) {
1220                 dev_err(&client->dev, "Cannot enable regulators\n");
1221                 goto fail2;
1222         }
1223
1224         usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
1225         err = bh1770_detect(chip);
1226         if (err < 0)
1227                 goto fail3;
1228
1229         /* Start chip */
1230         bh1770_chip_on(chip);
1231         pm_runtime_set_active(&client->dev);
1232         pm_runtime_enable(&client->dev);
1233
1234         chip->lux_corr = bh1770_get_corr_value(chip);
1235         if (chip->lux_corr == 0) {
1236                 dev_err(&client->dev, "Improper correction values\n");
1237                 err = -EINVAL;
1238                 goto fail3;
1239         }
1240
1241         if (chip->pdata->setup_resources) {
1242                 err = chip->pdata->setup_resources();
1243                 if (err) {
1244                         err = -EINVAL;
1245                         goto fail3;
1246                 }
1247         }
1248
1249         err = sysfs_create_group(&chip->client->dev.kobj,
1250                                 &bh1770_attribute_group);
1251         if (err < 0) {
1252                 dev_err(&chip->client->dev, "Sysfs registration failed\n");
1253                 goto fail4;
1254         }
1255
1256         /*
1257          * Chip needs level triggered interrupt to work. However,
1258          * level triggering doesn't work always correctly with power
1259          * management. Select both
1260          */
1261         err = request_threaded_irq(client->irq, NULL,
1262                                 bh1770_irq,
1263                                 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
1264                                 IRQF_TRIGGER_LOW,
1265                                 "bh1770", chip);
1266         if (err) {
1267                 dev_err(&client->dev, "could not get IRQ %d\n",
1268                         client->irq);
1269                 goto fail5;
1270         }
1271         regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1272         return err;
1273 fail5:
1274         sysfs_remove_group(&chip->client->dev.kobj,
1275                         &bh1770_attribute_group);
1276 fail4:
1277         if (chip->pdata->release_resources)
1278                 chip->pdata->release_resources();
1279 fail3:
1280         regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1281 fail2:
1282         regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
1283 fail1:
1284         kfree(chip);
1285         return err;
1286 }
1287
1288 static int bh1770_remove(struct i2c_client *client)
1289 {
1290         struct bh1770_chip *chip = i2c_get_clientdata(client);
1291
1292         free_irq(client->irq, chip);
1293
1294         sysfs_remove_group(&chip->client->dev.kobj,
1295                         &bh1770_attribute_group);
1296
1297         if (chip->pdata->release_resources)
1298                 chip->pdata->release_resources();
1299
1300         cancel_delayed_work_sync(&chip->prox_work);
1301
1302         if (!pm_runtime_suspended(&client->dev))
1303                 bh1770_chip_off(chip);
1304
1305         pm_runtime_disable(&client->dev);
1306         pm_runtime_set_suspended(&client->dev);
1307
1308         regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
1309         kfree(chip);
1310         return 0;
1311 }
1312
1313 #ifdef CONFIG_PM_SLEEP
1314 static int bh1770_suspend(struct device *dev)
1315 {
1316         struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1317         struct bh1770_chip *chip = i2c_get_clientdata(client);
1318
1319         bh1770_chip_off(chip);
1320
1321         return 0;
1322 }
1323
1324 static int bh1770_resume(struct device *dev)
1325 {
1326         struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1327         struct bh1770_chip *chip = i2c_get_clientdata(client);
1328         int ret = 0;
1329
1330         bh1770_chip_on(chip);
1331
1332         if (!pm_runtime_suspended(dev)) {
1333                 /*
1334                  * If we were enabled at suspend time, it is expected
1335                  * everything works nice and smoothly
1336                  */
1337                 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
1338                 ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
1339
1340                 /* This causes interrupt after the next measurement cycle */
1341                 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
1342                                         BH1770_LUX_DEF_THRES);
1343                 /* Inform that we are waiting for a result from ALS */
1344                 chip->lux_wait_result = true;
1345                 bh1770_prox_mode_control(chip);
1346         }
1347         return ret;
1348 }
1349 #endif
1350
1351 #ifdef CONFIG_PM_RUNTIME
1352 static int bh1770_runtime_suspend(struct device *dev)
1353 {
1354         struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1355         struct bh1770_chip *chip = i2c_get_clientdata(client);
1356
1357         bh1770_chip_off(chip);
1358
1359         return 0;
1360 }
1361
1362 static int bh1770_runtime_resume(struct device *dev)
1363 {
1364         struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1365         struct bh1770_chip *chip = i2c_get_clientdata(client);
1366
1367         bh1770_chip_on(chip);
1368
1369         return 0;
1370 }
1371 #endif
1372
1373 static const struct i2c_device_id bh1770_id[] = {
1374         {"bh1770glc", 0 },
1375         {"sfh7770", 0 },
1376         {}
1377 };
1378
1379 MODULE_DEVICE_TABLE(i2c, bh1770_id);
1380
1381 static const struct dev_pm_ops bh1770_pm_ops = {
1382         SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume)
1383         SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL)
1384 };
1385
1386 static struct i2c_driver bh1770_driver = {
1387         .driver  = {
1388                 .name   = "bh1770glc",
1389                 .owner  = THIS_MODULE,
1390                 .pm     = &bh1770_pm_ops,
1391         },
1392         .probe    = bh1770_probe,
1393         .remove   = bh1770_remove,
1394         .id_table = bh1770_id,
1395 };
1396
1397 module_i2c_driver(bh1770_driver);
1398
1399 MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor");
1400 MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
1401 MODULE_LICENSE("GPL v2");