Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/drivers/iio/light/gp2ap020a00f.c

  1 /*
  2  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
  3  * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
  4  *
  5  * IIO features supported by the driver:
  6  *
  7  * Read-only raw channels:
  8  *   - illuminance_clear [lux]
  9  *   - illuminance_ir
 10  *   - proximity
 11  *
 12  * Triggered buffer:
 13  *   - illuminance_clear
 14  *   - illuminance_ir
 15  *   - proximity
 16  *
 17  * Events:
 18  *   - illuminance_clear (rising and falling)
 19  *   - proximity (rising and falling)
 20  *     - both falling and rising thresholds for the proximity events
 21  *       must be set to the values greater than 0.
 22  *
 23  * The driver supports triggered buffers for all the three
 24  * channels as well as high and low threshold events for the
 25  * illuminance_clear and proxmimity channels. Triggers
 26  * can be enabled simultaneously with both illuminance_clear
 27  * events. Proximity events cannot be enabled simultaneously
 28  * with any triggers or illuminance events. Enabling/disabling
 29  * one of the proximity events automatically enables/disables
 30  * the other one.
 31  *
 32  * This program is free software; you can redistribute it and/or modify
 33  * it under the terms of the GNU General Public License version 2, as
 34  * published by the Free Software Foundation.
 35  */
 36 
 37 #include <linux/debugfs.h>
 38 #include <linux/delay.h>
 39 #include <linux/i2c.h>
 40 #include <linux/interrupt.h>
 41 #include <linux/irq.h>
 42 #include <linux/irq_work.h>
 43 #include <linux/module.h>
 44 #include <linux/mutex.h>
 45 #include <linux/of.h>
 46 #include <linux/regmap.h>
 47 #include <linux/regulator/consumer.h>
 48 #include <linux/slab.h>
 49 #include <asm/unaligned.h>
 50 #include <linux/iio/buffer.h>
 51 #include <linux/iio/events.h>
 52 #include <linux/iio/iio.h>
 53 #include <linux/iio/sysfs.h>
 54 #include <linux/iio/trigger.h>
 55 #include <linux/iio/trigger_consumer.h>
 56 #include <linux/iio/triggered_buffer.h>
 57 
 58 #define GP2A_I2C_NAME "gp2ap020a00f"
 59 
 60 /* Registers */
 61 #define GP2AP020A00F_OP_REG     0x00 /* Basic operations */
 62 #define GP2AP020A00F_ALS_REG    0x01 /* ALS related settings */
 63 #define GP2AP020A00F_PS_REG     0x02 /* PS related settings */
 64 #define GP2AP020A00F_LED_REG    0x03 /* LED reg */
 65 #define GP2AP020A00F_TL_L_REG   0x04 /* ALS: Threshold low LSB */
 66 #define GP2AP020A00F_TL_H_REG   0x05 /* ALS: Threshold low MSB */
 67 #define GP2AP020A00F_TH_L_REG   0x06 /* ALS: Threshold high LSB */
 68 #define GP2AP020A00F_TH_H_REG   0x07 /* ALS: Threshold high MSB */
 69 #define GP2AP020A00F_PL_L_REG   0x08 /* PS: Threshold low LSB */
 70 #define GP2AP020A00F_PL_H_REG   0x09 /* PS: Threshold low MSB */
 71 #define GP2AP020A00F_PH_L_REG   0x0a /* PS: Threshold high LSB */
 72 #define GP2AP020A00F_PH_H_REG   0x0b /* PS: Threshold high MSB */
 73 #define GP2AP020A00F_D0_L_REG   0x0c /* ALS result: Clear/Illuminance LSB */
 74 #define GP2AP020A00F_D0_H_REG   0x0d /* ALS result: Clear/Illuminance MSB */
 75 #define GP2AP020A00F_D1_L_REG   0x0e /* ALS result: IR LSB */
 76 #define GP2AP020A00F_D1_H_REG   0x0f /* ALS result: IR LSB */
 77 #define GP2AP020A00F_D2_L_REG   0x10 /* PS result LSB */
 78 #define GP2AP020A00F_D2_H_REG   0x11 /* PS result MSB */
 79 #define GP2AP020A00F_NUM_REGS   0x12 /* Number of registers */
 80 
 81 /* OP_REG bits */
 82 #define GP2AP020A00F_OP3_MASK           0x80 /* Software shutdown */
 83 #define GP2AP020A00F_OP3_SHUTDOWN       0x00
 84 #define GP2AP020A00F_OP3_OPERATION      0x80
 85 #define GP2AP020A00F_OP2_MASK           0x40 /* Auto shutdown/Continuous mode */
 86 #define GP2AP020A00F_OP2_AUTO_SHUTDOWN  0x00
 87 #define GP2AP020A00F_OP2_CONT_OPERATION 0x40
 88 #define GP2AP020A00F_OP_MASK            0x30 /* Operating mode selection  */
 89 #define GP2AP020A00F_OP_ALS_AND_PS      0x00
 90 #define GP2AP020A00F_OP_ALS             0x10
 91 #define GP2AP020A00F_OP_PS              0x20
 92 #define GP2AP020A00F_OP_DEBUG           0x30
 93 #define GP2AP020A00F_PROX_MASK          0x08 /* PS: detection/non-detection */
 94 #define GP2AP020A00F_PROX_NON_DETECT    0x00
 95 #define GP2AP020A00F_PROX_DETECT        0x08
 96 #define GP2AP020A00F_FLAG_P             0x04 /* PS: interrupt result  */
 97 #define GP2AP020A00F_FLAG_A             0x02 /* ALS: interrupt result  */
 98 #define GP2AP020A00F_TYPE_MASK          0x01 /* Output data type selection */
 99 #define GP2AP020A00F_TYPE_MANUAL_CALC   0x00
100 #define GP2AP020A00F_TYPE_AUTO_CALC     0x01
101 
102 /* ALS_REG bits */
103 #define GP2AP020A00F_PRST_MASK          0xc0 /* Number of measurement cycles */
104 #define GP2AP020A00F_PRST_ONCE          0x00
105 #define GP2AP020A00F_PRST_4_CYCLES      0x40
106 #define GP2AP020A00F_PRST_8_CYCLES      0x80
107 #define GP2AP020A00F_PRST_16_CYCLES     0xc0
108 #define GP2AP020A00F_RES_A_MASK         0x38 /* ALS: Resolution */
109 #define GP2AP020A00F_RES_A_800ms        0x00
110 #define GP2AP020A00F_RES_A_400ms        0x08
111 #define GP2AP020A00F_RES_A_200ms        0x10
112 #define GP2AP020A00F_RES_A_100ms        0x18
113 #define GP2AP020A00F_RES_A_25ms         0x20
114 #define GP2AP020A00F_RES_A_6_25ms       0x28
115 #define GP2AP020A00F_RES_A_1_56ms       0x30
116 #define GP2AP020A00F_RES_A_0_39ms       0x38
117 #define GP2AP020A00F_RANGE_A_MASK       0x07 /* ALS: Max measurable range */
118 #define GP2AP020A00F_RANGE_A_x1         0x00
119 #define GP2AP020A00F_RANGE_A_x2         0x01
120 #define GP2AP020A00F_RANGE_A_x4         0x02
121 #define GP2AP020A00F_RANGE_A_x8         0x03
122 #define GP2AP020A00F_RANGE_A_x16        0x04
123 #define GP2AP020A00F_RANGE_A_x32        0x05
124 #define GP2AP020A00F_RANGE_A_x64        0x06
125 #define GP2AP020A00F_RANGE_A_x128       0x07
126 
127 /* PS_REG bits */
128 #define GP2AP020A00F_ALC_MASK           0x80 /* Auto light cancel */
129 #define GP2AP020A00F_ALC_ON             0x80
130 #define GP2AP020A00F_ALC_OFF            0x00
131 #define GP2AP020A00F_INTTYPE_MASK       0x40 /* Interrupt type setting */
132 #define GP2AP020A00F_INTTYPE_LEVEL      0x00
133 #define GP2AP020A00F_INTTYPE_PULSE      0x40
134 #define GP2AP020A00F_RES_P_MASK         0x38 /* PS: Resolution */
135 #define GP2AP020A00F_RES_P_800ms_x2     0x00
136 #define GP2AP020A00F_RES_P_400ms_x2     0x08
137 #define GP2AP020A00F_RES_P_200ms_x2     0x10
138 #define GP2AP020A00F_RES_P_100ms_x2     0x18
139 #define GP2AP020A00F_RES_P_25ms_x2      0x20
140 #define GP2AP020A00F_RES_P_6_25ms_x2    0x28
141 #define GP2AP020A00F_RES_P_1_56ms_x2    0x30
142 #define GP2AP020A00F_RES_P_0_39ms_x2    0x38
143 #define GP2AP020A00F_RANGE_P_MASK       0x07 /* PS: Max measurable range */
144 #define GP2AP020A00F_RANGE_P_x1         0x00
145 #define GP2AP020A00F_RANGE_P_x2         0x01
146 #define GP2AP020A00F_RANGE_P_x4         0x02
147 #define GP2AP020A00F_RANGE_P_x8         0x03
148 #define GP2AP020A00F_RANGE_P_x16        0x04
149 #define GP2AP020A00F_RANGE_P_x32        0x05
150 #define GP2AP020A00F_RANGE_P_x64        0x06
151 #define GP2AP020A00F_RANGE_P_x128       0x07
152 
153 /* LED reg bits */
154 #define GP2AP020A00F_INTVAL_MASK        0xc0 /* Intermittent operating */
155 #define GP2AP020A00F_INTVAL_0           0x00
156 #define GP2AP020A00F_INTVAL_4           0x40
157 #define GP2AP020A00F_INTVAL_8           0x80
158 #define GP2AP020A00F_INTVAL_16          0xc0
159 #define GP2AP020A00F_IS_MASK            0x30 /* ILED drive peak current */
160 #define GP2AP020A00F_IS_13_8mA          0x00
161 #define GP2AP020A00F_IS_27_5mA          0x10
162 #define GP2AP020A00F_IS_55mA            0x20
163 #define GP2AP020A00F_IS_110mA           0x30
164 #define GP2AP020A00F_PIN_MASK           0x0c /* INT terminal setting */
165 #define GP2AP020A00F_PIN_ALS_OR_PS      0x00
166 #define GP2AP020A00F_PIN_ALS            0x04
167 #define GP2AP020A00F_PIN_PS             0x08
168 #define GP2AP020A00F_PIN_PS_DETECT      0x0c
169 #define GP2AP020A00F_FREQ_MASK          0x02 /* LED modulation frequency */
170 #define GP2AP020A00F_FREQ_327_5kHz      0x00
171 #define GP2AP020A00F_FREQ_81_8kHz       0x02
172 #define GP2AP020A00F_RST                0x01 /* Software reset */
173 
174 #define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR      0
175 #define GP2AP020A00F_SCAN_MODE_LIGHT_IR         1
176 #define GP2AP020A00F_SCAN_MODE_PROXIMITY        2
177 #define GP2AP020A00F_CHAN_TIMESTAMP             3
178 
179 #define GP2AP020A00F_DATA_READY_TIMEOUT         msecs_to_jiffies(1000)
180 #define GP2AP020A00F_DATA_REG(chan)             (GP2AP020A00F_D0_L_REG + \
181                                                         (chan) * 2)
182 #define GP2AP020A00F_THRESH_REG(th_val_id)      (GP2AP020A00F_TL_L_REG + \
183                                                         (th_val_id) * 2)
184 #define GP2AP020A00F_THRESH_VAL_ID(reg_addr)    ((reg_addr - 4) / 2)
185 
186 #define GP2AP020A00F_SUBTRACT_MODE      0
187 #define GP2AP020A00F_ADD_MODE           1
188 
189 #define GP2AP020A00F_MAX_CHANNELS       3
190 
191 enum gp2ap020a00f_opmode {
192         GP2AP020A00F_OPMODE_READ_RAW_CLEAR,
193         GP2AP020A00F_OPMODE_READ_RAW_IR,
194         GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY,
195         GP2AP020A00F_OPMODE_ALS,
196         GP2AP020A00F_OPMODE_PS,
197         GP2AP020A00F_OPMODE_ALS_AND_PS,
198         GP2AP020A00F_OPMODE_PROX_DETECT,
199         GP2AP020A00F_OPMODE_SHUTDOWN,
200         GP2AP020A00F_NUM_OPMODES,
201 };
202 
203 enum gp2ap020a00f_cmd {
204         GP2AP020A00F_CMD_READ_RAW_CLEAR,
205         GP2AP020A00F_CMD_READ_RAW_IR,
206         GP2AP020A00F_CMD_READ_RAW_PROXIMITY,
207         GP2AP020A00F_CMD_TRIGGER_CLEAR_EN,
208         GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS,
209         GP2AP020A00F_CMD_TRIGGER_IR_EN,
210         GP2AP020A00F_CMD_TRIGGER_IR_DIS,
211         GP2AP020A00F_CMD_TRIGGER_PROX_EN,
212         GP2AP020A00F_CMD_TRIGGER_PROX_DIS,
213         GP2AP020A00F_CMD_ALS_HIGH_EV_EN,
214         GP2AP020A00F_CMD_ALS_HIGH_EV_DIS,
215         GP2AP020A00F_CMD_ALS_LOW_EV_EN,
216         GP2AP020A00F_CMD_ALS_LOW_EV_DIS,
217         GP2AP020A00F_CMD_PROX_HIGH_EV_EN,
218         GP2AP020A00F_CMD_PROX_HIGH_EV_DIS,
219         GP2AP020A00F_CMD_PROX_LOW_EV_EN,
220         GP2AP020A00F_CMD_PROX_LOW_EV_DIS,
221 };
222 
223 enum gp2ap020a00f_flags {
224         GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER,
225         GP2AP020A00F_FLAG_ALS_IR_TRIGGER,
226         GP2AP020A00F_FLAG_PROX_TRIGGER,
227         GP2AP020A00F_FLAG_PROX_RISING_EV,
228         GP2AP020A00F_FLAG_PROX_FALLING_EV,
229         GP2AP020A00F_FLAG_ALS_RISING_EV,
230         GP2AP020A00F_FLAG_ALS_FALLING_EV,
231         GP2AP020A00F_FLAG_LUX_MODE_HI,
232         GP2AP020A00F_FLAG_DATA_READY,
233 };
234 
235 enum gp2ap020a00f_thresh_val_id {
236         GP2AP020A00F_THRESH_TL,
237         GP2AP020A00F_THRESH_TH,
238         GP2AP020A00F_THRESH_PL,
239         GP2AP020A00F_THRESH_PH,
240 };
241 
242 struct gp2ap020a00f_data {
243         const struct gp2ap020a00f_platform_data *pdata;
244         struct i2c_client *client;
245         struct mutex lock;
246         char *buffer;
247         struct regulator *vled_reg;
248         unsigned long flags;
249         enum gp2ap020a00f_opmode cur_opmode;
250         struct iio_trigger *trig;
251         struct regmap *regmap;
252         unsigned int thresh_val[4];
253         u8 debug_reg_addr;
254         struct irq_work work;
255         wait_queue_head_t data_ready_queue;
256 };
257 
258 static const u8 gp2ap020a00f_reg_init_tab[] = {
259         [GP2AP020A00F_OP_REG] = GP2AP020A00F_OP3_SHUTDOWN,
260         [GP2AP020A00F_ALS_REG] = GP2AP020A00F_RES_A_25ms |
261                                  GP2AP020A00F_RANGE_A_x8,
262         [GP2AP020A00F_PS_REG] = GP2AP020A00F_ALC_ON |
263                                 GP2AP020A00F_RES_P_1_56ms_x2 |
264                                 GP2AP020A00F_RANGE_P_x4,
265         [GP2AP020A00F_LED_REG] = GP2AP020A00F_INTVAL_0 |
266                                  GP2AP020A00F_IS_110mA |
267                                  GP2AP020A00F_FREQ_327_5kHz,
268         [GP2AP020A00F_TL_L_REG] = 0,
269         [GP2AP020A00F_TL_H_REG] = 0,
270         [GP2AP020A00F_TH_L_REG] = 0,
271         [GP2AP020A00F_TH_H_REG] = 0,
272         [GP2AP020A00F_PL_L_REG] = 0,
273         [GP2AP020A00F_PL_H_REG] = 0,
274         [GP2AP020A00F_PH_L_REG] = 0,
275         [GP2AP020A00F_PH_H_REG] = 0,
276 };
277 
278 static bool gp2ap020a00f_is_volatile_reg(struct device *dev, unsigned int reg)
279 {
280         switch (reg) {
281         case GP2AP020A00F_OP_REG:
282         case GP2AP020A00F_D0_L_REG:
283         case GP2AP020A00F_D0_H_REG:
284         case GP2AP020A00F_D1_L_REG:
285         case GP2AP020A00F_D1_H_REG:
286         case GP2AP020A00F_D2_L_REG:
287         case GP2AP020A00F_D2_H_REG:
288                 return true;
289         default:
290                 return false;
291         }
292 }
293 
294 static const struct regmap_config gp2ap020a00f_regmap_config = {
295         .reg_bits = 8,
296         .val_bits = 8,
297 
298         .max_register = GP2AP020A00F_D2_H_REG,
299         .cache_type = REGCACHE_RBTREE,
300 
301         .volatile_reg = gp2ap020a00f_is_volatile_reg,
302 };
303 
304 static const struct gp2ap020a00f_mutable_config_regs {
305         u8 op_reg;
306         u8 als_reg;
307         u8 ps_reg;
308         u8 led_reg;
309 } opmode_regs_settings[GP2AP020A00F_NUM_OPMODES] = {
310         [GP2AP020A00F_OPMODE_READ_RAW_CLEAR] = {
311                 GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
312                 | GP2AP020A00F_OP3_OPERATION
313                 | GP2AP020A00F_TYPE_AUTO_CALC,
314                 GP2AP020A00F_PRST_ONCE,
315                 GP2AP020A00F_INTTYPE_LEVEL,
316                 GP2AP020A00F_PIN_ALS
317         },
318         [GP2AP020A00F_OPMODE_READ_RAW_IR] = {
319                 GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
320                 | GP2AP020A00F_OP3_OPERATION
321                 | GP2AP020A00F_TYPE_MANUAL_CALC,
322                 GP2AP020A00F_PRST_ONCE,
323                 GP2AP020A00F_INTTYPE_LEVEL,
324                 GP2AP020A00F_PIN_ALS
325         },
326         [GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY] = {
327                 GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
328                 | GP2AP020A00F_OP3_OPERATION
329                 | GP2AP020A00F_TYPE_MANUAL_CALC,
330                 GP2AP020A00F_PRST_ONCE,
331                 GP2AP020A00F_INTTYPE_LEVEL,
332                 GP2AP020A00F_PIN_PS
333         },
334         [GP2AP020A00F_OPMODE_PROX_DETECT] = {
335                 GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
336                 | GP2AP020A00F_OP3_OPERATION
337                 | GP2AP020A00F_TYPE_MANUAL_CALC,
338                 GP2AP020A00F_PRST_4_CYCLES,
339                 GP2AP020A00F_INTTYPE_PULSE,
340                 GP2AP020A00F_PIN_PS_DETECT
341         },
342         [GP2AP020A00F_OPMODE_ALS] = {
343                 GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
344                 | GP2AP020A00F_OP3_OPERATION
345                 | GP2AP020A00F_TYPE_AUTO_CALC,
346                 GP2AP020A00F_PRST_ONCE,
347                 GP2AP020A00F_INTTYPE_LEVEL,
348                 GP2AP020A00F_PIN_ALS
349         },
350         [GP2AP020A00F_OPMODE_PS] = {
351                 GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
352                 | GP2AP020A00F_OP3_OPERATION
353                 | GP2AP020A00F_TYPE_MANUAL_CALC,
354                 GP2AP020A00F_PRST_4_CYCLES,
355                 GP2AP020A00F_INTTYPE_LEVEL,
356                 GP2AP020A00F_PIN_PS
357         },
358         [GP2AP020A00F_OPMODE_ALS_AND_PS] = {
359                 GP2AP020A00F_OP_ALS_AND_PS
360                 | GP2AP020A00F_OP2_CONT_OPERATION
361                 | GP2AP020A00F_OP3_OPERATION
362                 | GP2AP020A00F_TYPE_AUTO_CALC,
363                 GP2AP020A00F_PRST_4_CYCLES,
364                 GP2AP020A00F_INTTYPE_LEVEL,
365                 GP2AP020A00F_PIN_ALS_OR_PS
366         },
367         [GP2AP020A00F_OPMODE_SHUTDOWN] = { GP2AP020A00F_OP3_SHUTDOWN, },
368 };
369 
370 static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data,
371                                         enum gp2ap020a00f_opmode op)
372 {
373         unsigned int op_reg_val;
374         int err;
375 
376         if (op != GP2AP020A00F_OPMODE_SHUTDOWN) {
377                 err = regmap_read(data->regmap, GP2AP020A00F_OP_REG,
378                                         &op_reg_val);
379                 if (err < 0)
380                         return err;
381                 /*
382                  * Shutdown the device if the operation being executed entails
383                  * mode transition.
384                  */
385                 if ((opmode_regs_settings[op].op_reg & GP2AP020A00F_OP_MASK) !=
386                     (op_reg_val & GP2AP020A00F_OP_MASK)) {
387                         /* set shutdown mode */
388                         err = regmap_update_bits(data->regmap,
389                                 GP2AP020A00F_OP_REG, GP2AP020A00F_OP3_MASK,
390                                 GP2AP020A00F_OP3_SHUTDOWN);
391                         if (err < 0)
392                                 return err;
393                 }
394 
395                 err = regmap_update_bits(data->regmap, GP2AP020A00F_ALS_REG,
396                         GP2AP020A00F_PRST_MASK, opmode_regs_settings[op]
397                                                                 .als_reg);
398                 if (err < 0)
399                         return err;
400 
401                 err = regmap_update_bits(data->regmap, GP2AP020A00F_PS_REG,
402                         GP2AP020A00F_INTTYPE_MASK, opmode_regs_settings[op]
403                                                                 .ps_reg);
404                 if (err < 0)
405                         return err;
406 
407                 err = regmap_update_bits(data->regmap, GP2AP020A00F_LED_REG,
408                         GP2AP020A00F_PIN_MASK, opmode_regs_settings[op]
409                                                                 .led_reg);
410                 if (err < 0)
411                         return err;
412         }
413 
414         /* Set OP_REG and apply operation mode (power on / off) */
415         err = regmap_update_bits(data->regmap,
416                                  GP2AP020A00F_OP_REG,
417                                  GP2AP020A00F_OP_MASK | GP2AP020A00F_OP2_MASK |
418                                  GP2AP020A00F_OP3_MASK | GP2AP020A00F_TYPE_MASK,
419                                  opmode_regs_settings[op].op_reg);
420         if (err < 0)
421                 return err;
422 
423         data->cur_opmode = op;
424 
425         return 0;
426 }
427 
428 static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data)
429 {
430         return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags) ||
431                test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags) ||
432                test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags) ||
433                test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
434 }
435 
436 static bool gp2ap020a00f_prox_detect_enabled(struct gp2ap020a00f_data *data)
437 {
438         return test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags) ||
439                test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
440 }
441 
442 static int gp2ap020a00f_write_event_threshold(struct gp2ap020a00f_data *data,
443                                 enum gp2ap020a00f_thresh_val_id th_val_id,
444                                 bool enable)
445 {
446         __le16 thresh_buf = 0;
447         unsigned int thresh_reg_val;
448 
449         if (!enable)
450                 thresh_reg_val = 0;
451         else if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags) &&
452                  th_val_id != GP2AP020A00F_THRESH_PL &&
453                  th_val_id != GP2AP020A00F_THRESH_PH)
454                 /*
455                  * For the high lux mode ALS threshold has to be scaled down
456                  * to allow for proper comparison with the output value.
457                  */
458                 thresh_reg_val = data->thresh_val[th_val_id] / 16;
459         else
460                 thresh_reg_val = data->thresh_val[th_val_id] > 16000 ?
461                                         16000 :
462                                         data->thresh_val[th_val_id];
463 
464         thresh_buf = cpu_to_le16(thresh_reg_val);
465 
466         return regmap_bulk_write(data->regmap,
467                                  GP2AP020A00F_THRESH_REG(th_val_id),
468                                  (u8 *)&thresh_buf, 2);
469 }
470 
471 static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data,
472                         enum gp2ap020a00f_opmode diff_mode, int add_sub)
473 {
474         enum gp2ap020a00f_opmode new_mode;
475 
476         if (diff_mode != GP2AP020A00F_OPMODE_ALS &&
477             diff_mode != GP2AP020A00F_OPMODE_PS)
478                 return -EINVAL;
479 
480         if (add_sub == GP2AP020A00F_ADD_MODE) {
481                 if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN)
482                         new_mode =  diff_mode;
483                 else
484                         new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS;
485         } else {
486                 if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS)
487                         new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ?
488                                         GP2AP020A00F_OPMODE_PS :
489                                         GP2AP020A00F_OPMODE_ALS;
490                 else
491                         new_mode = GP2AP020A00F_OPMODE_SHUTDOWN;
492         }
493 
494         return gp2ap020a00f_set_operation_mode(data, new_mode);
495 }
496 
497 static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data,
498                                         enum gp2ap020a00f_cmd cmd)
499 {
500         int err = 0;
501 
502         switch (cmd) {
503         case GP2AP020A00F_CMD_READ_RAW_CLEAR:
504                 if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
505                         return -EBUSY;
506                 err = gp2ap020a00f_set_operation_mode(data,
507                                         GP2AP020A00F_OPMODE_READ_RAW_CLEAR);
508                 break;
509         case GP2AP020A00F_CMD_READ_RAW_IR:
510                 if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
511                         return -EBUSY;
512                 err = gp2ap020a00f_set_operation_mode(data,
513                                         GP2AP020A00F_OPMODE_READ_RAW_IR);
514                 break;
515         case GP2AP020A00F_CMD_READ_RAW_PROXIMITY:
516                 if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
517                         return -EBUSY;
518                 err = gp2ap020a00f_set_operation_mode(data,
519                                         GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY);
520                 break;
521         case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN:
522                 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
523                         return -EBUSY;
524                 if (!gp2ap020a00f_als_enabled(data))
525                         err = gp2ap020a00f_alter_opmode(data,
526                                                 GP2AP020A00F_OPMODE_ALS,
527                                                 GP2AP020A00F_ADD_MODE);
528                 set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
529                 break;
530         case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS:
531                 clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
532                 if (gp2ap020a00f_als_enabled(data))
533                         break;
534                 err = gp2ap020a00f_alter_opmode(data,
535                                                 GP2AP020A00F_OPMODE_ALS,
536                                                 GP2AP020A00F_SUBTRACT_MODE);
537                 break;
538         case GP2AP020A00F_CMD_TRIGGER_IR_EN:
539                 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
540                         return -EBUSY;
541                 if (!gp2ap020a00f_als_enabled(data))
542                         err = gp2ap020a00f_alter_opmode(data,
543                                                 GP2AP020A00F_OPMODE_ALS,
544                                                 GP2AP020A00F_ADD_MODE);
545                 set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
546                 break;
547         case GP2AP020A00F_CMD_TRIGGER_IR_DIS:
548                 clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
549                 if (gp2ap020a00f_als_enabled(data))
550                         break;
551                 err = gp2ap020a00f_alter_opmode(data,
552                                                 GP2AP020A00F_OPMODE_ALS,
553                                                 GP2AP020A00F_SUBTRACT_MODE);
554                 break;
555         case GP2AP020A00F_CMD_TRIGGER_PROX_EN:
556                 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
557                         return -EBUSY;
558                 err = gp2ap020a00f_alter_opmode(data,
559                                                 GP2AP020A00F_OPMODE_PS,
560                                                 GP2AP020A00F_ADD_MODE);
561                 set_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags);
562                 break;
563         case GP2AP020A00F_CMD_TRIGGER_PROX_DIS:
564                 clear_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags);
565                 err = gp2ap020a00f_alter_opmode(data,
566                                                 GP2AP020A00F_OPMODE_PS,
567                                                 GP2AP020A00F_SUBTRACT_MODE);
568                 break;
569         case GP2AP020A00F_CMD_ALS_HIGH_EV_EN:
570                 if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags))
571                         return 0;
572                 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
573                         return -EBUSY;
574                 if (!gp2ap020a00f_als_enabled(data)) {
575                         err = gp2ap020a00f_alter_opmode(data,
576                                                 GP2AP020A00F_OPMODE_ALS,
577                                                 GP2AP020A00F_ADD_MODE);
578                         if (err < 0)
579                                 return err;
580                 }
581                 set_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags);
582                 err =  gp2ap020a00f_write_event_threshold(data,
583                                         GP2AP020A00F_THRESH_TH, true);
584                 break;
585         case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS:
586                 if (!test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags))
587                         return 0;
588                 clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags);
589                 if (!gp2ap020a00f_als_enabled(data)) {
590                         err = gp2ap020a00f_alter_opmode(data,
591                                                 GP2AP020A00F_OPMODE_ALS,
592                                                 GP2AP020A00F_SUBTRACT_MODE);
593                         if (err < 0)
594                                 return err;
595                 }
596                 err =  gp2ap020a00f_write_event_threshold(data,
597                                         GP2AP020A00F_THRESH_TH, false);
598                 break;
599         case GP2AP020A00F_CMD_ALS_LOW_EV_EN:
600                 if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags))
601                         return 0;
602                 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
603                         return -EBUSY;
604                 if (!gp2ap020a00f_als_enabled(data)) {
605                         err = gp2ap020a00f_alter_opmode(data,
606                                                 GP2AP020A00F_OPMODE_ALS,
607                                                 GP2AP020A00F_ADD_MODE);
608                         if (err < 0)
609                                 return err;
610                 }
611                 set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
612                 err =  gp2ap020a00f_write_event_threshold(data,
613                                         GP2AP020A00F_THRESH_TL, true);
614                 break;
615         case GP2AP020A00F_CMD_ALS_LOW_EV_DIS:
616                 if (!test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags))
617                         return 0;
618                 clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
619                 if (!gp2ap020a00f_als_enabled(data)) {
620                         err = gp2ap020a00f_alter_opmode(data,
621                                                 GP2AP020A00F_OPMODE_ALS,
622                                                 GP2AP020A00F_SUBTRACT_MODE);
623                         if (err < 0)
624                                 return err;
625                 }
626                 err =  gp2ap020a00f_write_event_threshold(data,
627                                         GP2AP020A00F_THRESH_TL, false);
628                 break;
629         case GP2AP020A00F_CMD_PROX_HIGH_EV_EN:
630                 if (test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags))
631                         return 0;
632                 if (gp2ap020a00f_als_enabled(data) ||
633                     data->cur_opmode == GP2AP020A00F_OPMODE_PS)
634                         return -EBUSY;
635                 if (!gp2ap020a00f_prox_detect_enabled(data)) {
636                         err = gp2ap020a00f_set_operation_mode(data,
637                                         GP2AP020A00F_OPMODE_PROX_DETECT);
638                         if (err < 0)
639                                 return err;
640                 }
641                 set_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags);
642                 err =  gp2ap020a00f_write_event_threshold(data,
643                                         GP2AP020A00F_THRESH_PH, true);
644                 break;
645         case GP2AP020A00F_CMD_PROX_HIGH_EV_DIS:
646                 if (!test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags))
647                         return 0;
648                 clear_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags);
649                 err = gp2ap020a00f_set_operation_mode(data,
650                                         GP2AP020A00F_OPMODE_SHUTDOWN);
651                 if (err < 0)
652                         return err;
653                 err =  gp2ap020a00f_write_event_threshold(data,
654                                         GP2AP020A00F_THRESH_PH, false);
655                 break;
656         case GP2AP020A00F_CMD_PROX_LOW_EV_EN:
657                 if (test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags))
658                         return 0;
659                 if (gp2ap020a00f_als_enabled(data) ||
660                     data->cur_opmode == GP2AP020A00F_OPMODE_PS)
661                         return -EBUSY;
662                 if (!gp2ap020a00f_prox_detect_enabled(data)) {
663                         err = gp2ap020a00f_set_operation_mode(data,
664                                         GP2AP020A00F_OPMODE_PROX_DETECT);
665                         if (err < 0)
666                                 return err;
667                 }
668                 set_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
669                 err =  gp2ap020a00f_write_event_threshold(data,
670                                         GP2AP020A00F_THRESH_PL, true);
671                 break;
672         case GP2AP020A00F_CMD_PROX_LOW_EV_DIS:
673                 if (!test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags))
674                         return 0;
675                 clear_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
676                 err = gp2ap020a00f_set_operation_mode(data,
677                                         GP2AP020A00F_OPMODE_SHUTDOWN);
678                 if (err < 0)
679                         return err;
680                 err =  gp2ap020a00f_write_event_threshold(data,
681                                         GP2AP020A00F_THRESH_PL, false);
682                 break;
683         }
684 
685         return err;
686 }
687 
688 static int wait_conversion_complete_irq(struct gp2ap020a00f_data *data)
689 {
690         int ret;
691 
692         ret = wait_event_timeout(data->data_ready_queue,
693                                  test_bit(GP2AP020A00F_FLAG_DATA_READY,
694                                           &data->flags),
695                                  GP2AP020A00F_DATA_READY_TIMEOUT);
696         clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags);
697 
698         return ret > 0 ? 0 : -ETIME;
699 }
700 
701 static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data,
702                                         unsigned int output_reg, int *val)
703 {
704         u8 reg_buf[2];
705         int err;
706 
707         err = wait_conversion_complete_irq(data);
708         if (err < 0)
709                 dev_dbg(&data->client->dev, "data ready timeout\n");
710 
711         err = regmap_bulk_read(data->regmap, output_reg, reg_buf, 2);
712         if (err < 0)
713                 return err;
714 
715         *val = le16_to_cpup((__le16 *)reg_buf);
716 
717         return err;
718 }
719 
720 static bool gp2ap020a00f_adjust_lux_mode(struct gp2ap020a00f_data *data,
721                                  int output_val)
722 {
723         u8 new_range = 0xff;
724         int err;
725 
726         if (!test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) {
727                 if (output_val > 16000) {
728                         set_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags);
729                         new_range = GP2AP020A00F_RANGE_A_x128;
730                 }
731         } else {
732                 if (output_val < 1000) {
733                         clear_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags);
734                         new_range = GP2AP020A00F_RANGE_A_x8;
735                 }
736         }
737 
738         if (new_range != 0xff) {
739                 /* Clear als threshold registers to avoid spurious
740                  * events caused by lux mode transition.
741                  */
742                 err =  gp2ap020a00f_write_event_threshold(data,
743                                         GP2AP020A00F_THRESH_TH, false);
744                 if (err < 0) {
745                         dev_err(&data->client->dev,
746                                 "Clearing als threshold register failed.\n");
747                         return false;
748                 }
749 
750                 err =  gp2ap020a00f_write_event_threshold(data,
751                                         GP2AP020A00F_THRESH_TL, false);
752                 if (err < 0) {
753                         dev_err(&data->client->dev,
754                                 "Clearing als threshold register failed.\n");
755                         return false;
756                 }
757 
758                 /* Change lux mode */
759                 err = regmap_update_bits(data->regmap,
760                         GP2AP020A00F_OP_REG,
761                         GP2AP020A00F_OP3_MASK,
762                         GP2AP020A00F_OP3_SHUTDOWN);
763 
764                 if (err < 0) {
765                         dev_err(&data->client->dev,
766                                 "Shutting down the device failed.\n");
767                         return false;
768                 }
769 
770                 err = regmap_update_bits(data->regmap,
771                         GP2AP020A00F_ALS_REG,
772                         GP2AP020A00F_RANGE_A_MASK,
773                         new_range);
774 
775                 if (err < 0) {
776                         dev_err(&data->client->dev,
777                                 "Adjusting device lux mode failed.\n");
778                         return false;
779                 }
780 
781                 err = regmap_update_bits(data->regmap,
782                         GP2AP020A00F_OP_REG,
783                         GP2AP020A00F_OP3_MASK,
784                         GP2AP020A00F_OP3_OPERATION);
785 
786                 if (err < 0) {
787                         dev_err(&data->client->dev,
788                                 "Powering up the device failed.\n");
789                         return false;
790                 }
791 
792                 /* Adjust als threshold register values to the new lux mode */
793                 if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) {
794                         err =  gp2ap020a00f_write_event_threshold(data,
795                                         GP2AP020A00F_THRESH_TH, true);
796                         if (err < 0) {
797                                 dev_err(&data->client->dev,
798                                 "Adjusting als threshold value failed.\n");
799                                 return false;
800                         }
801                 }
802 
803                 if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) {
804                         err =  gp2ap020a00f_write_event_threshold(data,
805                                         GP2AP020A00F_THRESH_TL, true);
806                         if (err < 0) {
807                                 dev_err(&data->client->dev,
808                                 "Adjusting als threshold value failed.\n");
809                                 return false;
810                         }
811                 }
812 
813                 return true;
814         }
815 
816         return false;
817 }
818 
819 static void gp2ap020a00f_output_to_lux(struct gp2ap020a00f_data *data,
820                                                 int *output_val)
821 {
822         if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags))
823                 *output_val *= 16;
824 }
825 
826 static void gp2ap020a00f_iio_trigger_work(struct irq_work *work)
827 {
828         struct gp2ap020a00f_data *data =
829                 container_of(work, struct gp2ap020a00f_data, work);
830 
831         iio_trigger_poll(data->trig);
832 }
833 
834 static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data)
835 {
836         struct iio_dev *indio_dev = data;
837         struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
838         unsigned int op_reg_val;
839         int ret;
840 
841         /* Read interrupt flags */
842         ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, &op_reg_val);
843         if (ret < 0)
844                 return IRQ_HANDLED;
845 
846         if (gp2ap020a00f_prox_detect_enabled(priv)) {
847                 if (op_reg_val & GP2AP020A00F_PROX_DETECT) {
848                         iio_push_event(indio_dev,
849                                IIO_UNMOD_EVENT_CODE(
850                                     IIO_PROXIMITY,
851                                     GP2AP020A00F_SCAN_MODE_PROXIMITY,
852                                     IIO_EV_TYPE_ROC,
853                                     IIO_EV_DIR_RISING),
854                                iio_get_time_ns());
855                 } else {
856                         iio_push_event(indio_dev,
857                                IIO_UNMOD_EVENT_CODE(
858                                     IIO_PROXIMITY,
859                                     GP2AP020A00F_SCAN_MODE_PROXIMITY,
860                                     IIO_EV_TYPE_ROC,
861                                     IIO_EV_DIR_FALLING),
862                                iio_get_time_ns());
863                 }
864         }
865 
866         return IRQ_HANDLED;
867 }
868 
869 static irqreturn_t gp2ap020a00f_thresh_event_handler(int irq, void *data)
870 {
871         struct iio_dev *indio_dev = data;
872         struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
873         u8 op_reg_flags, d0_reg_buf[2];
874         unsigned int output_val, op_reg_val;
875         int thresh_val_id, ret;
876 
877         /* Read interrupt flags */
878         ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG,
879                                                         &op_reg_val);
880         if (ret < 0)
881                 goto done;
882 
883         op_reg_flags = op_reg_val & (GP2AP020A00F_FLAG_A | GP2AP020A00F_FLAG_P
884                                         | GP2AP020A00F_PROX_DETECT);
885 
886         op_reg_val &= (~GP2AP020A00F_FLAG_A & ~GP2AP020A00F_FLAG_P
887                                         & ~GP2AP020A00F_PROX_DETECT);
888 
889         /* Clear interrupt flags (if not in INTTYPE_PULSE mode) */
890         if (priv->cur_opmode != GP2AP020A00F_OPMODE_PROX_DETECT) {
891                 ret = regmap_write(priv->regmap, GP2AP020A00F_OP_REG,
892                                                                 op_reg_val);
893                 if (ret < 0)
894                         goto done;
895         }
896 
897         if (op_reg_flags & GP2AP020A00F_FLAG_A) {
898                 /* Check D0 register to assess if the lux mode
899                  * transition is required.
900                  */
901                 ret = regmap_bulk_read(priv->regmap, GP2AP020A00F_D0_L_REG,
902                                                         d0_reg_buf, 2);
903                 if (ret < 0)
904                         goto done;
905 
906                 output_val = le16_to_cpup((__le16 *)d0_reg_buf);
907 
908                 if (gp2ap020a00f_adjust_lux_mode(priv, output_val))
909                         goto done;
910 
911                 gp2ap020a00f_output_to_lux(priv, &output_val);
912 
913                 /*
914                  * We need to check output value to distinguish
915                  * between high and low ambient light threshold event.
916                  */
917                 if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &priv->flags)) {
918                         thresh_val_id =
919                             GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TH_L_REG);
920                         if (output_val > priv->thresh_val[thresh_val_id])
921                                 iio_push_event(indio_dev,
922                                        IIO_MOD_EVENT_CODE(
923                                             IIO_LIGHT,
924                                             GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
925                                             IIO_MOD_LIGHT_CLEAR,
926                                             IIO_EV_TYPE_THRESH,
927                                             IIO_EV_DIR_RISING),
928                                        iio_get_time_ns());
929                 }
930 
931                 if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &priv->flags)) {
932                         thresh_val_id =
933                             GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TL_L_REG);
934                         if (output_val < priv->thresh_val[thresh_val_id])
935                                 iio_push_event(indio_dev,
936                                        IIO_MOD_EVENT_CODE(
937                                             IIO_LIGHT,
938                                             GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
939                                             IIO_MOD_LIGHT_CLEAR,
940                                             IIO_EV_TYPE_THRESH,
941                                             IIO_EV_DIR_FALLING),
942                                        iio_get_time_ns());
943                 }
944         }
945 
946         if (priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR ||
947             priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR ||
948             priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) {
949                 set_bit(GP2AP020A00F_FLAG_DATA_READY, &priv->flags);
950                 wake_up(&priv->data_ready_queue);
951                 goto done;
952         }
953 
954         if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &priv->flags) ||
955             test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &priv->flags) ||
956             test_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &priv->flags))
957                 /* This fires off the trigger. */
958                 irq_work_queue(&priv->work);
959 
960 done:
961         return IRQ_HANDLED;
962 }
963 
964 static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data)
965 {
966         struct iio_poll_func *pf = data;
967         struct iio_dev *indio_dev = pf->indio_dev;
968         struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
969         size_t d_size = 0;
970         int i, out_val, ret;
971 
972         for_each_set_bit(i, indio_dev->active_scan_mask,
973                 indio_dev->masklength) {
974                 ret = regmap_bulk_read(priv->regmap,
975                                 GP2AP020A00F_DATA_REG(i),
976                                 &priv->buffer[d_size], 2);
977                 if (ret < 0)
978                         goto done;
979 
980                 if (i == GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR ||
981                     i == GP2AP020A00F_SCAN_MODE_LIGHT_IR) {
982                         out_val = le16_to_cpup((__le16 *)&priv->buffer[d_size]);
983                         gp2ap020a00f_output_to_lux(priv, &out_val);
984 
985                         put_unaligned_le32(out_val, &priv->buffer[d_size]);
986                         d_size += 4;
987                 } else {
988                         d_size += 2;
989                 }
990         }
991 
992         iio_push_to_buffers_with_timestamp(indio_dev, priv->buffer,
993                 pf->timestamp);
994 done:
995         iio_trigger_notify_done(indio_dev->trig);
996 
997         return IRQ_HANDLED;
998 }
999 
1000 static u8 gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan,
1001                                              enum iio_event_direction event_dir)
1002 {
1003         switch (chan->type) {
1004         case IIO_PROXIMITY:
1005                 if (event_dir == IIO_EV_DIR_RISING)
1006                         return GP2AP020A00F_PH_L_REG;
1007                 else
1008                         return GP2AP020A00F_PL_L_REG;
1009         case IIO_LIGHT:
1010                 if (event_dir == IIO_EV_DIR_RISING)
1011                         return GP2AP020A00F_TH_L_REG;
1012                 else
1013                         return GP2AP020A00F_TL_L_REG;
1014         default:
1015                 break;
1016         }
1017 
1018         return -EINVAL;
1019 }
1020 
1021 static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev,
1022                                         const struct iio_chan_spec *chan,
1023                                         enum iio_event_type type,
1024                                         enum iio_event_direction dir,
1025                                         enum iio_event_info info,
1026                                         int val, int val2)
1027 {
1028         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1029         bool event_en = false;
1030         u8 thresh_val_id;
1031         u8 thresh_reg_l;
1032         int err = 0;
1033 
1034         mutex_lock(&data->lock);
1035 
1036         thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir);
1037         thresh_val_id = GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l);
1038 
1039         if (thresh_val_id > GP2AP020A00F_THRESH_PH) {
1040                 err = -EINVAL;
1041                 goto error_unlock;
1042         }
1043 
1044         switch (thresh_reg_l) {
1045         case GP2AP020A00F_TH_L_REG:
1046                 event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV,
1047                                                         &data->flags);
1048                 break;
1049         case GP2AP020A00F_TL_L_REG:
1050                 event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV,
1051                                                         &data->flags);
1052                 break;
1053         case GP2AP020A00F_PH_L_REG:
1054                 if (val == 0) {
1055                         err = -EINVAL;
1056                         goto error_unlock;
1057                 }
1058                 event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV,
1059                                                         &data->flags);
1060                 break;
1061         case GP2AP020A00F_PL_L_REG:
1062                 if (val == 0) {
1063                         err = -EINVAL;
1064                         goto error_unlock;
1065                 }
1066                 event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV,
1067                                                         &data->flags);
1068                 break;
1069         }
1070 
1071         data->thresh_val[thresh_val_id] = val;
1072         err =  gp2ap020a00f_write_event_threshold(data, thresh_val_id,
1073                                                         event_en);
1074 error_unlock:
1075         mutex_unlock(&data->lock);
1076 
1077         return err;
1078 }
1079 
1080 static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev,
1081                                        const struct iio_chan_spec *chan,
1082                                        enum iio_event_type type,
1083                                        enum iio_event_direction dir,
1084                                        enum iio_event_info info,
1085                                        int *val, int *val2)
1086 {
1087         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1088         u8 thresh_reg_l;
1089         int err = IIO_VAL_INT;
1090 
1091         mutex_lock(&data->lock);
1092 
1093         thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir);
1094 
1095         if (thresh_reg_l > GP2AP020A00F_PH_L_REG) {
1096                 err = -EINVAL;
1097                 goto error_unlock;
1098         }
1099 
1100         *val = data->thresh_val[GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l)];
1101 
1102 error_unlock:
1103         mutex_unlock(&data->lock);
1104 
1105         return err;
1106 }
1107 
1108 static int gp2ap020a00f_write_prox_event_config(struct iio_dev *indio_dev,
1109                                                 int state)
1110 {
1111         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1112         enum gp2ap020a00f_cmd cmd_high_ev, cmd_low_ev;
1113         int err;
1114 
1115         cmd_high_ev = state ? GP2AP020A00F_CMD_PROX_HIGH_EV_EN :
1116                               GP2AP020A00F_CMD_PROX_HIGH_EV_DIS;
1117         cmd_low_ev = state ? GP2AP020A00F_CMD_PROX_LOW_EV_EN :
1118                              GP2AP020A00F_CMD_PROX_LOW_EV_DIS;
1119 
1120         /*
1121          * In order to enable proximity detection feature in the device
1122          * both high and low threshold registers have to be written
1123          * with different values, greater than zero.
1124          */
1125         if (state) {
1126                 if (data->thresh_val[GP2AP020A00F_THRESH_PL] == 0)
1127                         return -EINVAL;
1128 
1129                 if (data->thresh_val[GP2AP020A00F_THRESH_PH] == 0)
1130                         return -EINVAL;
1131         }
1132 
1133         err = gp2ap020a00f_exec_cmd(data, cmd_high_ev);
1134         if (err < 0)
1135                 return err;
1136 
1137         err = gp2ap020a00f_exec_cmd(data, cmd_low_ev);
1138         if (err < 0)
1139                 return err;
1140 
1141         free_irq(data->client->irq, indio_dev);
1142 
1143         if (state)
1144                 err = request_threaded_irq(data->client->irq, NULL,
1145                                            &gp2ap020a00f_prox_sensing_handler,
1146                                            IRQF_TRIGGER_RISING |
1147                                            IRQF_TRIGGER_FALLING |
1148                                            IRQF_ONESHOT,
1149                                            "gp2ap020a00f_prox_sensing",
1150                                            indio_dev);
1151         else {
1152                 err = request_threaded_irq(data->client->irq, NULL,
1153                                            &gp2ap020a00f_thresh_event_handler,
1154                                            IRQF_TRIGGER_FALLING |
1155                                            IRQF_ONESHOT,
1156                                            "gp2ap020a00f_thresh_event",
1157                                            indio_dev);
1158         }
1159 
1160         return err;
1161 }
1162 
1163 static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev,
1164                                            const struct iio_chan_spec *chan,
1165                                            enum iio_event_type type,
1166                                            enum iio_event_direction dir,
1167                                            int state)
1168 {
1169         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1170         enum gp2ap020a00f_cmd cmd;
1171         int err;
1172 
1173         mutex_lock(&data->lock);
1174 
1175         switch (chan->type) {
1176         case IIO_PROXIMITY:
1177                 err = gp2ap020a00f_write_prox_event_config(indio_dev, state);
1178                 break;
1179         case IIO_LIGHT:
1180                 if (dir == IIO_EV_DIR_RISING) {
1181                         cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN :
1182                                       GP2AP020A00F_CMD_ALS_HIGH_EV_DIS;
1183                         err = gp2ap020a00f_exec_cmd(data, cmd);
1184                 } else {
1185                         cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN :
1186                                       GP2AP020A00F_CMD_ALS_LOW_EV_DIS;
1187                         err = gp2ap020a00f_exec_cmd(data, cmd);
1188                 }
1189                 break;
1190         default:
1191                 err = -EINVAL;
1192         }
1193 
1194         mutex_unlock(&data->lock);
1195 
1196         return err;
1197 }
1198 
1199 static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev,
1200                                            const struct iio_chan_spec *chan,
1201                                            enum iio_event_type type,
1202                                            enum iio_event_direction dir)
1203 {
1204         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1205         int event_en = 0;
1206 
1207         mutex_lock(&data->lock);
1208 
1209         switch (chan->type) {
1210         case IIO_PROXIMITY:
1211                 if (dir == IIO_EV_DIR_RISING)
1212                         event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV,
1213                                                                 &data->flags);
1214                 else
1215                         event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV,
1216                                                                 &data->flags);
1217                 break;
1218         case IIO_LIGHT:
1219                 if (dir == IIO_EV_DIR_RISING)
1220                         event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV,
1221                                                                 &data->flags);
1222                 else
1223                         event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV,
1224                                                                 &data->flags);
1225                 break;
1226         default:
1227                 event_en = -EINVAL;
1228                 break;
1229         }
1230 
1231         mutex_unlock(&data->lock);
1232 
1233         return event_en;
1234 }
1235 
1236 static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data,
1237                                 struct iio_chan_spec const *chan, int *val)
1238 {
1239         enum gp2ap020a00f_cmd cmd;
1240         int err;
1241 
1242         switch (chan->scan_index) {
1243         case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
1244                 cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR;
1245                 break;
1246         case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
1247                 cmd = GP2AP020A00F_CMD_READ_RAW_IR;
1248                 break;
1249         case GP2AP020A00F_SCAN_MODE_PROXIMITY:
1250                 cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY;
1251                 break;
1252         default:
1253                 return -EINVAL;
1254         }
1255 
1256         err = gp2ap020a00f_exec_cmd(data, cmd);
1257         if (err < 0) {
1258                 dev_err(&data->client->dev,
1259                         "gp2ap020a00f_exec_cmd failed\n");
1260                 goto error_ret;
1261         }
1262 
1263         err = gp2ap020a00f_read_output(data, chan->address, val);
1264         if (err < 0)
1265                 dev_err(&data->client->dev,
1266                         "gp2ap020a00f_read_output failed\n");
1267 
1268         err = gp2ap020a00f_set_operation_mode(data,
1269                                         GP2AP020A00F_OPMODE_SHUTDOWN);
1270         if (err < 0)
1271                 dev_err(&data->client->dev,
1272                         "Failed to shut down the device.\n");
1273 
1274         if (cmd == GP2AP020A00F_CMD_READ_RAW_CLEAR ||
1275             cmd == GP2AP020A00F_CMD_READ_RAW_IR)
1276                 gp2ap020a00f_output_to_lux(data, val);
1277 
1278 error_ret:
1279         return err;
1280 }
1281 
1282 static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev,
1283                            struct iio_chan_spec const *chan,
1284                            int *val, int *val2,
1285                            long mask)
1286 {
1287         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1288         int err = -EINVAL;
1289 
1290         mutex_lock(&data->lock);
1291 
1292         switch (mask) {
1293         case IIO_CHAN_INFO_RAW:
1294                 if (iio_buffer_enabled(indio_dev)) {
1295                         err = -EBUSY;
1296                         goto error_unlock;
1297                 }
1298 
1299                 err = gp2ap020a00f_read_channel(data, chan, val);
1300                 break;
1301         }
1302 
1303 error_unlock:
1304         mutex_unlock(&data->lock);
1305 
1306         return err < 0 ? err : IIO_VAL_INT;
1307 }
1308 
1309 static const struct iio_event_spec gp2ap020a00f_event_spec_light[] = {
1310         {
1311                 .type = IIO_EV_TYPE_THRESH,
1312                 .dir = IIO_EV_DIR_RISING,
1313                 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1314                         BIT(IIO_EV_INFO_ENABLE),
1315         }, {
1316                 .type = IIO_EV_TYPE_THRESH,
1317                 .dir = IIO_EV_DIR_FALLING,
1318                 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1319                         BIT(IIO_EV_INFO_ENABLE),
1320         },
1321 };
1322 
1323 static const struct iio_event_spec gp2ap020a00f_event_spec_prox[] = {
1324         {
1325                 .type = IIO_EV_TYPE_ROC,
1326                 .dir = IIO_EV_DIR_RISING,
1327                 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1328                         BIT(IIO_EV_INFO_ENABLE),
1329         }, {
1330                 .type = IIO_EV_TYPE_ROC,
1331                 .dir = IIO_EV_DIR_FALLING,
1332                 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1333                         BIT(IIO_EV_INFO_ENABLE),
1334         },
1335 };
1336 
1337 static const struct iio_chan_spec gp2ap020a00f_channels[] = {
1338         {
1339                 .type = IIO_LIGHT,
1340                 .channel2 = IIO_MOD_LIGHT_CLEAR,
1341                 .modified = 1,
1342                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1343                 .scan_type = {
1344                         .sign = 'u',
1345                         .realbits = 24,
1346                         .shift = 0,
1347                         .storagebits = 32,
1348                         .endianness = IIO_LE,
1349                 },
1350                 .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
1351                 .address = GP2AP020A00F_D0_L_REG,
1352                 .event_spec = gp2ap020a00f_event_spec_light,
1353                 .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_light),
1354         },
1355         {
1356                 .type = IIO_LIGHT,
1357                 .channel2 = IIO_MOD_LIGHT_IR,
1358                 .modified = 1,
1359                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1360                 .scan_type = {
1361                         .sign = 'u',
1362                         .realbits = 24,
1363                         .shift = 0,
1364                         .storagebits = 32,
1365                         .endianness = IIO_LE,
1366                 },
1367                 .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR,
1368                 .address = GP2AP020A00F_D1_L_REG,
1369         },
1370         {
1371                 .type = IIO_PROXIMITY,
1372                 .modified = 0,
1373                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1374                 .scan_type = {
1375                         .sign = 'u',
1376                         .realbits = 16,
1377                         .shift = 0,
1378                         .storagebits = 16,
1379                         .endianness = IIO_LE,
1380                 },
1381                 .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY,
1382                 .address = GP2AP020A00F_D2_L_REG,
1383                 .event_spec = gp2ap020a00f_event_spec_prox,
1384                 .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_prox),
1385         },
1386         IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP),
1387 };
1388 
1389 static const struct iio_info gp2ap020a00f_info = {
1390         .read_raw = &gp2ap020a00f_read_raw,
1391         .read_event_value = &gp2ap020a00f_read_event_val,
1392         .read_event_config = &gp2ap020a00f_read_event_config,
1393         .write_event_value = &gp2ap020a00f_write_event_val,
1394         .write_event_config = &gp2ap020a00f_write_event_config,
1395         .driver_module = THIS_MODULE,
1396 };
1397 
1398 static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
1399 {
1400         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1401         int i, err = 0;
1402 
1403         mutex_lock(&data->lock);
1404 
1405         /*
1406          * Enable triggers according to the scan_mask. Enabling either
1407          * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS
1408          * module in the device, which generates samples in both D0 (clear)
1409          * and D1 (ir) registers. As the two registers are bound to the
1410          * two separate IIO channels they are treated in the driver logic
1411          * as if they were controlled independently.
1412          */
1413         for_each_set_bit(i, indio_dev->active_scan_mask,
1414                 indio_dev->masklength) {
1415                 switch (i) {
1416                 case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
1417                         err = gp2ap020a00f_exec_cmd(data,
1418                                         GP2AP020A00F_CMD_TRIGGER_CLEAR_EN);
1419                         break;
1420                 case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
1421                         err = gp2ap020a00f_exec_cmd(data,
1422                                         GP2AP020A00F_CMD_TRIGGER_IR_EN);
1423                         break;
1424                 case GP2AP020A00F_SCAN_MODE_PROXIMITY:
1425                         err = gp2ap020a00f_exec_cmd(data,
1426                                         GP2AP020A00F_CMD_TRIGGER_PROX_EN);
1427                         break;
1428                 }
1429         }
1430 
1431         if (err < 0)
1432                 goto error_unlock;
1433 
1434         data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
1435         if (!data->buffer) {
1436                 err = -ENOMEM;
1437                 goto error_unlock;
1438         }
1439 
1440         err = iio_triggered_buffer_postenable(indio_dev);
1441 
1442 error_unlock:
1443         mutex_unlock(&data->lock);
1444 
1445         return err;
1446 }
1447 
1448 static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
1449 {
1450         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1451         int i, err;
1452 
1453         mutex_lock(&data->lock);
1454 
1455         err = iio_triggered_buffer_predisable(indio_dev);
1456         if (err < 0)
1457                 goto error_unlock;
1458 
1459         for_each_set_bit(i, indio_dev->active_scan_mask,
1460                 indio_dev->masklength) {
1461                 switch (i) {
1462                 case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
1463                         err = gp2ap020a00f_exec_cmd(data,
1464                                         GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS);
1465                         break;
1466                 case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
1467                         err = gp2ap020a00f_exec_cmd(data,
1468                                         GP2AP020A00F_CMD_TRIGGER_IR_DIS);
1469                         break;
1470                 case GP2AP020A00F_SCAN_MODE_PROXIMITY:
1471                         err = gp2ap020a00f_exec_cmd(data,
1472                                         GP2AP020A00F_CMD_TRIGGER_PROX_DIS);
1473                         break;
1474                 }
1475         }
1476 
1477         if (err == 0)
1478                 kfree(data->buffer);
1479 
1480 error_unlock:
1481         mutex_unlock(&data->lock);
1482 
1483         return err;
1484 }
1485 
1486 static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = {
1487         .postenable = &gp2ap020a00f_buffer_postenable,
1488         .predisable = &gp2ap020a00f_buffer_predisable,
1489 };
1490 
1491 static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = {
1492         .owner = THIS_MODULE,
1493 };
1494 
1495 static int gp2ap020a00f_probe(struct i2c_client *client,
1496                                 const struct i2c_device_id *id)
1497 {
1498         struct gp2ap020a00f_data *data;
1499         struct iio_dev *indio_dev;
1500         struct regmap *regmap;
1501         int err;
1502 
1503         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1504         if (!indio_dev)
1505                 return -ENOMEM;
1506 
1507         data = iio_priv(indio_dev);
1508 
1509         data->vled_reg = devm_regulator_get(&client->dev, "vled");
1510         if (IS_ERR(data->vled_reg))
1511                 return PTR_ERR(data->vled_reg);
1512 
1513         err = regulator_enable(data->vled_reg);
1514         if (err)
1515                 return err;
1516 
1517         regmap = devm_regmap_init_i2c(client, &gp2ap020a00f_regmap_config);
1518         if (IS_ERR(regmap)) {
1519                 dev_err(&client->dev, "Regmap initialization failed.\n");
1520                 err = PTR_ERR(regmap);
1521                 goto error_regulator_disable;
1522         }
1523 
1524         /* Initialize device registers */
1525         err = regmap_bulk_write(regmap, GP2AP020A00F_OP_REG,
1526                         gp2ap020a00f_reg_init_tab,
1527                         ARRAY_SIZE(gp2ap020a00f_reg_init_tab));
1528 
1529         if (err < 0) {
1530                 dev_err(&client->dev, "Device initialization failed.\n");
1531                 goto error_regulator_disable;
1532         }
1533 
1534         i2c_set_clientdata(client, indio_dev);
1535 
1536         data->client = client;
1537         data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN;
1538         data->regmap = regmap;
1539         init_waitqueue_head(&data->data_ready_queue);
1540 
1541         mutex_init(&data->lock);
1542         indio_dev->dev.parent = &client->dev;
1543         indio_dev->channels = gp2ap020a00f_channels;
1544         indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels);
1545         indio_dev->info = &gp2ap020a00f_info;
1546         indio_dev->name = id->name;
1547         indio_dev->modes = INDIO_DIRECT_MODE;
1548 
1549         /* Allocate buffer */
1550         err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
1551                 &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops);
1552         if (err < 0)
1553                 goto error_regulator_disable;
1554 
1555         /* Allocate trigger */
1556         data->trig = devm_iio_trigger_alloc(&client->dev, "%s-trigger",
1557                                                         indio_dev->name);
1558         if (data->trig == NULL) {
1559                 err = -ENOMEM;
1560                 dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n");
1561                 goto error_uninit_buffer;
1562         }
1563 
1564         /* This needs to be requested here for read_raw calls to work. */
1565         err = request_threaded_irq(client->irq, NULL,
1566                                    &gp2ap020a00f_thresh_event_handler,
1567                                    IRQF_TRIGGER_FALLING |
1568                                    IRQF_ONESHOT,
1569                                    "gp2ap020a00f_als_event",
1570                                    indio_dev);
1571         if (err < 0) {
1572                 dev_err(&client->dev, "Irq request failed.\n");
1573                 goto error_uninit_buffer;
1574         }
1575 
1576         data->trig->ops = &gp2ap020a00f_trigger_ops;
1577         data->trig->dev.parent = &data->client->dev;
1578 
1579         init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work);
1580 
1581         err = iio_trigger_register(data->trig);
1582         if (err < 0) {
1583                 dev_err(&client->dev, "Failed to register iio trigger.\n");
1584                 goto error_free_irq;
1585         }
1586 
1587         err = iio_device_register(indio_dev);
1588         if (err < 0)
1589                 goto error_trigger_unregister;
1590 
1591         return 0;
1592 
1593 error_trigger_unregister:
1594         iio_trigger_unregister(data->trig);
1595 error_free_irq:
1596         free_irq(client->irq, indio_dev);
1597 error_uninit_buffer:
1598         iio_triggered_buffer_cleanup(indio_dev);
1599 error_regulator_disable:
1600         regulator_disable(data->vled_reg);
1601 
1602         return err;
1603 }
1604 
1605 static int gp2ap020a00f_remove(struct i2c_client *client)
1606 {
1607         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1608         struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1609         int err;
1610 
1611         err = gp2ap020a00f_set_operation_mode(data,
1612                                         GP2AP020A00F_OPMODE_SHUTDOWN);
1613         if (err < 0)
1614                 dev_err(&indio_dev->dev, "Failed to power off the device.\n");
1615 
1616         iio_device_unregister(indio_dev);
1617         iio_trigger_unregister(data->trig);
1618         free_irq(client->irq, indio_dev);
1619         iio_triggered_buffer_cleanup(indio_dev);
1620         regulator_disable(data->vled_reg);
1621 
1622         return 0;
1623 }
1624 
1625 static const struct i2c_device_id gp2ap020a00f_id[] = {
1626         { GP2A_I2C_NAME, 0 },
1627         { }
1628 };
1629 
1630 MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id);
1631 
1632 #ifdef CONFIG_OF
1633 static const struct of_device_id gp2ap020a00f_of_match[] = {
1634         { .compatible = "sharp,gp2ap020a00f" },
1635         { }
1636 };
1637 #endif
1638 
1639 static struct i2c_driver gp2ap020a00f_driver = {
1640         .driver = {
1641                 .name   = GP2A_I2C_NAME,
1642                 .of_match_table = of_match_ptr(gp2ap020a00f_of_match),
1643                 .owner  = THIS_MODULE,
1644         },
1645         .probe          = gp2ap020a00f_probe,
1646         .remove         = gp2ap020a00f_remove,
1647         .id_table       = gp2ap020a00f_id,
1648 };
1649 
1650 module_i2c_driver(gp2ap020a00f_driver);
1651 
1652 MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
1653 MODULE_DESCRIPTION("Sharp GP2AP020A00F Proximity/ALS sensor driver");
1654 MODULE_LICENSE("GPL v2");
1655 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us