2 * RPR-0521 ROHM Ambient Light and Proximity Sensor
4 * Copyright (c) 2015, Intel Corporation.
6 * This file is subject to the terms and conditions of version 2 of
7 * the GNU General Public License. See the file COPYING in the main
8 * directory of this archive for more details.
10 * IIO driver for RPR-0521RS (7-bit I2C slave address 0x38).
12 * TODO: illuminance channel
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/i2c.h>
18 #include <linux/regmap.h>
19 #include <linux/delay.h>
20 #include <linux/acpi.h>
22 #include <linux/iio/iio.h>
23 #include <linux/iio/buffer.h>
24 #include <linux/iio/trigger.h>
25 #include <linux/iio/trigger_consumer.h>
26 #include <linux/iio/triggered_buffer.h>
27 #include <linux/iio/sysfs.h>
28 #include <linux/pm_runtime.h>
30 #define RPR0521_REG_SYSTEM_CTRL 0x40
31 #define RPR0521_REG_MODE_CTRL 0x41
32 #define RPR0521_REG_ALS_CTRL 0x42
33 #define RPR0521_REG_PXS_CTRL 0x43
34 #define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */
35 #define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */
36 #define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */
37 #define RPR0521_REG_INTERRUPT 0x4A
38 #define RPR0521_REG_PS_OFFSET_LSB 0x53
39 #define RPR0521_REG_ID 0x92
41 #define RPR0521_MODE_ALS_MASK BIT(7)
42 #define RPR0521_MODE_PXS_MASK BIT(6)
43 #define RPR0521_MODE_MEAS_TIME_MASK GENMASK(3, 0)
44 #define RPR0521_ALS_DATA0_GAIN_MASK GENMASK(5, 4)
45 #define RPR0521_ALS_DATA0_GAIN_SHIFT 4
46 #define RPR0521_ALS_DATA1_GAIN_MASK GENMASK(3, 2)
47 #define RPR0521_ALS_DATA1_GAIN_SHIFT 2
48 #define RPR0521_PXS_GAIN_MASK GENMASK(5, 4)
49 #define RPR0521_PXS_GAIN_SHIFT 4
50 #define RPR0521_PXS_PERSISTENCE_MASK GENMASK(3, 0)
51 #define RPR0521_INTERRUPT_INT_TRIG_PS_MASK BIT(0)
52 #define RPR0521_INTERRUPT_INT_TRIG_ALS_MASK BIT(1)
53 #define RPR0521_INTERRUPT_INT_REASSERT_MASK BIT(3)
54 #define RPR0521_INTERRUPT_ALS_INT_STATUS_MASK BIT(6)
55 #define RPR0521_INTERRUPT_PS_INT_STATUS_MASK BIT(7)
57 #define RPR0521_MODE_ALS_ENABLE BIT(7)
58 #define RPR0521_MODE_ALS_DISABLE 0x00
59 #define RPR0521_MODE_PXS_ENABLE BIT(6)
60 #define RPR0521_MODE_PXS_DISABLE 0x00
61 #define RPR0521_PXS_PERSISTENCE_DRDY 0x00
63 #define RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE BIT(0)
64 #define RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE 0x00
65 #define RPR0521_INTERRUPT_INT_TRIG_ALS_ENABLE BIT(1)
66 #define RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE 0x00
67 #define RPR0521_INTERRUPT_INT_REASSERT_ENABLE BIT(3)
68 #define RPR0521_INTERRUPT_INT_REASSERT_DISABLE 0x00
70 #define RPR0521_MANUFACT_ID 0xE0
71 #define RPR0521_DEFAULT_MEAS_TIME 0x06 /* ALS - 100ms, PXS - 100ms */
73 #define RPR0521_DRV_NAME "RPR0521"
74 #define RPR0521_IRQ_NAME "rpr0521_event"
75 #define RPR0521_REGMAP_NAME "rpr0521_regmap"
77 #define RPR0521_SLEEP_DELAY_MS 2000
79 #define RPR0521_ALS_SCALE_AVAIL "0.007812 0.015625 0.5 1"
80 #define RPR0521_PXS_SCALE_AVAIL "0.125 0.5 1"
87 static const struct rpr0521_gain rpr0521_als_gain[4] = {
94 static const struct rpr0521_gain rpr0521_pxs_gain[3] = {
100 enum rpr0521_channel {
102 RPR0521_CHAN_ALS_DATA0,
103 RPR0521_CHAN_ALS_DATA1,
106 struct rpr0521_reg_desc {
111 static const struct rpr0521_reg_desc rpr0521_data_reg[] = {
112 [RPR0521_CHAN_PXS] = {
113 .address = RPR0521_REG_PXS_DATA,
114 .device_mask = RPR0521_MODE_PXS_MASK,
116 [RPR0521_CHAN_ALS_DATA0] = {
117 .address = RPR0521_REG_ALS_DATA0,
118 .device_mask = RPR0521_MODE_ALS_MASK,
120 [RPR0521_CHAN_ALS_DATA1] = {
121 .address = RPR0521_REG_ALS_DATA1,
122 .device_mask = RPR0521_MODE_ALS_MASK,
126 static const struct rpr0521_gain_info {
130 const struct rpr0521_gain *gain;
133 [RPR0521_CHAN_PXS] = {
134 .reg = RPR0521_REG_PXS_CTRL,
135 .mask = RPR0521_PXS_GAIN_MASK,
136 .shift = RPR0521_PXS_GAIN_SHIFT,
137 .gain = rpr0521_pxs_gain,
138 .size = ARRAY_SIZE(rpr0521_pxs_gain),
140 [RPR0521_CHAN_ALS_DATA0] = {
141 .reg = RPR0521_REG_ALS_CTRL,
142 .mask = RPR0521_ALS_DATA0_GAIN_MASK,
143 .shift = RPR0521_ALS_DATA0_GAIN_SHIFT,
144 .gain = rpr0521_als_gain,
145 .size = ARRAY_SIZE(rpr0521_als_gain),
147 [RPR0521_CHAN_ALS_DATA1] = {
148 .reg = RPR0521_REG_ALS_CTRL,
149 .mask = RPR0521_ALS_DATA1_GAIN_MASK,
150 .shift = RPR0521_ALS_DATA1_GAIN_SHIFT,
151 .gain = rpr0521_als_gain,
152 .size = ARRAY_SIZE(rpr0521_als_gain),
156 struct rpr0521_samp_freq {
163 static const struct rpr0521_samp_freq rpr0521_samp_freq_i[13] = {
164 /* {ALS, PXS}, W==currently writable option */
165 {0, 0, 0, 0}, /* W0000, 0=standby */
166 {0, 0, 100, 0}, /* 0001 */
167 {0, 0, 25, 0}, /* 0010 */
168 {0, 0, 10, 0}, /* 0011 */
169 {0, 0, 2, 500000}, /* 0100 */
170 {10, 0, 20, 0}, /* 0101 */
171 {10, 0, 10, 0}, /* W0110 */
172 {10, 0, 2, 500000}, /* 0111 */
173 {2, 500000, 20, 0}, /* 1000, measurement 100ms, sleep 300ms */
174 {2, 500000, 10, 0}, /* 1001, measurement 100ms, sleep 300ms */
175 {2, 500000, 0, 0}, /* 1010, high sensitivity mode */
176 {2, 500000, 2, 500000}, /* W1011, high sensitivity mode */
177 {20, 0, 20, 0} /* 1100, ALS_data x 0.5, see specification P.18 */
180 struct rpr0521_data {
181 struct i2c_client *client;
183 /* protect device params updates (e.g state, gain) */
186 /* device active status */
190 struct iio_trigger *drdy_trigger0;
193 /* optimize runtime pm ops - enable/disable device only if needed */
199 struct regmap *regmap;
202 static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL);
203 static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL);
206 * Start with easy freq first, whole table of freq combinations is more
209 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("2.5 10");
211 static struct attribute *rpr0521_attributes[] = {
212 &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
213 &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
214 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
218 static const struct attribute_group rpr0521_attribute_group = {
219 .attrs = rpr0521_attributes,
222 /* Order of the channel data in buffer */
223 enum rpr0521_scan_index_order {
224 RPR0521_CHAN_INDEX_PXS,
225 RPR0521_CHAN_INDEX_BOTH,
226 RPR0521_CHAN_INDEX_IR,
229 static const unsigned long rpr0521_available_scan_masks[] = {
230 BIT(RPR0521_CHAN_INDEX_PXS) | BIT(RPR0521_CHAN_INDEX_BOTH) |
231 BIT(RPR0521_CHAN_INDEX_IR),
235 static const struct iio_chan_spec rpr0521_channels[] = {
237 .type = IIO_PROXIMITY,
238 .address = RPR0521_CHAN_PXS,
239 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
240 BIT(IIO_CHAN_INFO_OFFSET) |
241 BIT(IIO_CHAN_INFO_SCALE),
242 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
243 .scan_index = RPR0521_CHAN_INDEX_PXS,
248 .endianness = IIO_LE,
252 .type = IIO_INTENSITY,
254 .address = RPR0521_CHAN_ALS_DATA0,
255 .channel2 = IIO_MOD_LIGHT_BOTH,
256 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
257 BIT(IIO_CHAN_INFO_SCALE),
258 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
259 .scan_index = RPR0521_CHAN_INDEX_BOTH,
264 .endianness = IIO_LE,
268 .type = IIO_INTENSITY,
270 .address = RPR0521_CHAN_ALS_DATA1,
271 .channel2 = IIO_MOD_LIGHT_IR,
272 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
273 BIT(IIO_CHAN_INFO_SCALE),
274 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
275 .scan_index = RPR0521_CHAN_INDEX_IR,
280 .endianness = IIO_LE,
285 static int rpr0521_als_enable(struct rpr0521_data *data, u8 status)
289 ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
290 RPR0521_MODE_ALS_MASK,
295 if (status & RPR0521_MODE_ALS_MASK)
296 data->als_dev_en = true;
298 data->als_dev_en = false;
303 static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status)
307 ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
308 RPR0521_MODE_PXS_MASK,
313 if (status & RPR0521_MODE_PXS_MASK)
314 data->pxs_dev_en = true;
316 data->pxs_dev_en = false;
322 * rpr0521_set_power_state - handles runtime PM state and sensors enabled status
324 * @data: rpr0521 device private data
325 * @on: state to be set for devices in @device_mask
326 * @device_mask: bitmask specifying for which device we need to update @on state
328 * Calls for this function must be balanced so that each ON should have matching
329 * OFF. Otherwise pm usage_count gets out of sync.
331 static int rpr0521_set_power_state(struct rpr0521_data *data, bool on,
337 if (device_mask & RPR0521_MODE_ALS_MASK) {
338 data->als_ps_need_en = on;
339 data->als_need_dis = !on;
342 if (device_mask & RPR0521_MODE_PXS_MASK) {
343 data->pxs_ps_need_en = on;
344 data->pxs_need_dis = !on;
348 * On: _resume() is called only when we are suspended
349 * Off: _suspend() is called after delay if _resume() is not
350 * called before that.
351 * Note: If either measurement is re-enabled before _suspend(),
352 * both stay enabled until _suspend().
355 ret = pm_runtime_get_sync(&data->client->dev);
357 pm_runtime_mark_last_busy(&data->client->dev);
358 ret = pm_runtime_put_autosuspend(&data->client->dev);
361 dev_err(&data->client->dev,
362 "Failed: rpr0521_set_power_state for %d, ret %d\n",
365 pm_runtime_put_noidle(&data->client->dev);
371 /* If _resume() was not called, enable measurement now. */
372 if (data->als_ps_need_en) {
373 ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
376 data->als_ps_need_en = false;
379 if (data->pxs_ps_need_en) {
380 ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
383 data->pxs_ps_need_en = false;
390 /* Interrupt register tells if this sensor caused the interrupt or not. */
391 static inline bool rpr0521_is_triggered(struct rpr0521_data *data)
396 ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, ®);
398 return false; /* Reg read failed. */
400 (RPR0521_INTERRUPT_ALS_INT_STATUS_MASK |
401 RPR0521_INTERRUPT_PS_INT_STATUS_MASK))
404 return false; /* Int not from this sensor. */
407 /* IRQ to trigger handler */
408 static irqreturn_t rpr0521_drdy_irq_handler(int irq, void *private)
410 struct iio_dev *indio_dev = private;
411 struct rpr0521_data *data = iio_priv(indio_dev);
413 data->irq_timestamp = iio_get_time_ns(indio_dev);
415 * We need to wake the thread to read the interrupt reg. It
416 * is not possible to do that here because regmap_read takes a
420 return IRQ_WAKE_THREAD;
423 static irqreturn_t rpr0521_drdy_irq_thread(int irq, void *private)
425 struct iio_dev *indio_dev = private;
426 struct rpr0521_data *data = iio_priv(indio_dev);
428 if (rpr0521_is_triggered(data)) {
429 iio_trigger_poll_chained(data->drdy_trigger0);
436 static irqreturn_t rpr0521_trigger_consumer_store_time(int irq, void *p)
438 struct iio_poll_func *pf = p;
439 struct iio_dev *indio_dev = pf->indio_dev;
441 /* Other trigger polls store time here. */
442 if (!iio_trigger_using_own(indio_dev))
443 pf->timestamp = iio_get_time_ns(indio_dev);
445 return IRQ_WAKE_THREAD;
448 static irqreturn_t rpr0521_trigger_consumer_handler(int irq, void *p)
450 struct iio_poll_func *pf = p;
451 struct iio_dev *indio_dev = pf->indio_dev;
452 struct rpr0521_data *data = iio_priv(indio_dev);
455 u8 buffer[16]; /* 3 16-bit channels + padding + ts */
457 /* Use irq timestamp when reasonable. */
458 if (iio_trigger_using_own(indio_dev) && data->irq_timestamp) {
459 pf->timestamp = data->irq_timestamp;
460 data->irq_timestamp = 0;
462 /* Other chained trigger polls get timestamp only here. */
464 pf->timestamp = iio_get_time_ns(indio_dev);
466 err = regmap_bulk_read(data->regmap, RPR0521_REG_PXS_DATA,
468 (3 * 2) + 1); /* 3 * 16-bit + (discarded) int clear reg. */
470 iio_push_to_buffers_with_timestamp(indio_dev,
471 buffer, pf->timestamp);
473 dev_err(&data->client->dev,
474 "Trigger consumer can't read from sensor.\n");
477 iio_trigger_notify_done(indio_dev->trig);
482 static int rpr0521_write_int_enable(struct rpr0521_data *data)
486 /* Interrupt after each measurement */
487 err = regmap_update_bits(data->regmap, RPR0521_REG_PXS_CTRL,
488 RPR0521_PXS_PERSISTENCE_MASK,
489 RPR0521_PXS_PERSISTENCE_DRDY);
491 dev_err(&data->client->dev, "PS control reg write fail.\n");
495 /* Ignore latch and mode because of drdy */
496 err = regmap_write(data->regmap, RPR0521_REG_INTERRUPT,
497 RPR0521_INTERRUPT_INT_REASSERT_DISABLE |
498 RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE |
499 RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE
502 dev_err(&data->client->dev, "Interrupt setup write fail.\n");
509 static int rpr0521_write_int_disable(struct rpr0521_data *data)
511 /* Don't care of clearing mode, assert and latch. */
512 return regmap_write(data->regmap, RPR0521_REG_INTERRUPT,
513 RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE |
514 RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE
519 * Trigger producer enable / disable. Note that there will be trigs only when
520 * measurement data is ready to be read.
522 static int rpr0521_pxs_drdy_set_state(struct iio_trigger *trigger,
525 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger);
526 struct rpr0521_data *data = iio_priv(indio_dev);
530 err = rpr0521_write_int_enable(data);
532 err = rpr0521_write_int_disable(data);
534 dev_err(&data->client->dev, "rpr0521_pxs_drdy_set_state failed\n");
539 static const struct iio_trigger_ops rpr0521_trigger_ops = {
540 .set_trigger_state = rpr0521_pxs_drdy_set_state,
541 .owner = THIS_MODULE,
545 static int rpr0521_buffer_preenable(struct iio_dev *indio_dev)
548 struct rpr0521_data *data = iio_priv(indio_dev);
550 mutex_lock(&data->lock);
551 err = rpr0521_set_power_state(data, true,
552 (RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK));
553 mutex_unlock(&data->lock);
555 dev_err(&data->client->dev, "_buffer_preenable fail\n");
560 static int rpr0521_buffer_postdisable(struct iio_dev *indio_dev)
563 struct rpr0521_data *data = iio_priv(indio_dev);
565 mutex_lock(&data->lock);
566 err = rpr0521_set_power_state(data, false,
567 (RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK));
568 mutex_unlock(&data->lock);
570 dev_err(&data->client->dev, "_buffer_postdisable fail\n");
575 static const struct iio_buffer_setup_ops rpr0521_buffer_setup_ops = {
576 .preenable = rpr0521_buffer_preenable,
577 .postenable = iio_triggered_buffer_postenable,
578 .predisable = iio_triggered_buffer_predisable,
579 .postdisable = rpr0521_buffer_postdisable,
582 static int rpr0521_get_gain(struct rpr0521_data *data, int chan,
587 ret = regmap_read(data->regmap, rpr0521_gain[chan].reg, ®);
591 idx = (rpr0521_gain[chan].mask & reg) >> rpr0521_gain[chan].shift;
592 *val = rpr0521_gain[chan].gain[idx].scale;
593 *val2 = rpr0521_gain[chan].gain[idx].uscale;
598 static int rpr0521_set_gain(struct rpr0521_data *data, int chan,
601 int i, idx = -EINVAL;
604 for (i = 0; i < rpr0521_gain[chan].size; i++)
605 if (val == rpr0521_gain[chan].gain[i].scale &&
606 val2 == rpr0521_gain[chan].gain[i].uscale) {
614 return regmap_update_bits(data->regmap, rpr0521_gain[chan].reg,
615 rpr0521_gain[chan].mask,
616 idx << rpr0521_gain[chan].shift);
619 static int rpr0521_read_samp_freq(struct rpr0521_data *data,
620 enum iio_chan_type chan_type,
625 ret = regmap_read(data->regmap, RPR0521_REG_MODE_CTRL, ®);
629 reg &= RPR0521_MODE_MEAS_TIME_MASK;
630 if (reg >= ARRAY_SIZE(rpr0521_samp_freq_i))
635 *val = rpr0521_samp_freq_i[reg].als_hz;
636 *val2 = rpr0521_samp_freq_i[reg].als_uhz;
640 *val = rpr0521_samp_freq_i[reg].pxs_hz;
641 *val2 = rpr0521_samp_freq_i[reg].pxs_uhz;
649 static int rpr0521_write_samp_freq_common(struct rpr0521_data *data,
650 enum iio_chan_type chan_type,
657 * both pxs and als are setup only to same freq because of simplicity
679 return regmap_update_bits(data->regmap,
680 RPR0521_REG_MODE_CTRL,
681 RPR0521_MODE_MEAS_TIME_MASK,
685 static int rpr0521_read_ps_offset(struct rpr0521_data *data, int *offset)
690 ret = regmap_bulk_read(data->regmap,
691 RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer));
694 dev_err(&data->client->dev, "Failed to read PS OFFSET register\n");
697 *offset = le16_to_cpu(buffer);
702 static int rpr0521_write_ps_offset(struct rpr0521_data *data, int offset)
707 buffer = cpu_to_le16(offset & 0x3ff);
708 ret = regmap_raw_write(data->regmap,
709 RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer));
712 dev_err(&data->client->dev, "Failed to write PS OFFSET register\n");
719 static int rpr0521_read_raw(struct iio_dev *indio_dev,
720 struct iio_chan_spec const *chan, int *val,
721 int *val2, long mask)
723 struct rpr0521_data *data = iio_priv(indio_dev);
730 case IIO_CHAN_INFO_RAW:
731 if (chan->type != IIO_INTENSITY && chan->type != IIO_PROXIMITY)
734 busy = iio_device_claim_direct_mode(indio_dev);
738 device_mask = rpr0521_data_reg[chan->address].device_mask;
740 mutex_lock(&data->lock);
741 ret = rpr0521_set_power_state(data, true, device_mask);
743 goto rpr0521_read_raw_out;
745 ret = regmap_bulk_read(data->regmap,
746 rpr0521_data_reg[chan->address].address,
747 &raw_data, sizeof(raw_data));
749 rpr0521_set_power_state(data, false, device_mask);
750 goto rpr0521_read_raw_out;
753 ret = rpr0521_set_power_state(data, false, device_mask);
755 rpr0521_read_raw_out:
756 mutex_unlock(&data->lock);
757 iio_device_release_direct_mode(indio_dev);
761 *val = le16_to_cpu(raw_data);
765 case IIO_CHAN_INFO_SCALE:
766 mutex_lock(&data->lock);
767 ret = rpr0521_get_gain(data, chan->address, val, val2);
768 mutex_unlock(&data->lock);
772 return IIO_VAL_INT_PLUS_MICRO;
774 case IIO_CHAN_INFO_SAMP_FREQ:
775 mutex_lock(&data->lock);
776 ret = rpr0521_read_samp_freq(data, chan->type, val, val2);
777 mutex_unlock(&data->lock);
781 return IIO_VAL_INT_PLUS_MICRO;
783 case IIO_CHAN_INFO_OFFSET:
784 mutex_lock(&data->lock);
785 ret = rpr0521_read_ps_offset(data, val);
786 mutex_unlock(&data->lock);
797 static int rpr0521_write_raw(struct iio_dev *indio_dev,
798 struct iio_chan_spec const *chan, int val,
801 struct rpr0521_data *data = iio_priv(indio_dev);
805 case IIO_CHAN_INFO_SCALE:
806 mutex_lock(&data->lock);
807 ret = rpr0521_set_gain(data, chan->address, val, val2);
808 mutex_unlock(&data->lock);
812 case IIO_CHAN_INFO_SAMP_FREQ:
813 mutex_lock(&data->lock);
814 ret = rpr0521_write_samp_freq_common(data, chan->type,
816 mutex_unlock(&data->lock);
820 case IIO_CHAN_INFO_OFFSET:
821 mutex_lock(&data->lock);
822 ret = rpr0521_write_ps_offset(data, val);
823 mutex_unlock(&data->lock);
832 static const struct iio_info rpr0521_info = {
833 .driver_module = THIS_MODULE,
834 .read_raw = rpr0521_read_raw,
835 .write_raw = rpr0521_write_raw,
836 .attrs = &rpr0521_attribute_group,
839 static int rpr0521_init(struct rpr0521_data *data)
844 ret = regmap_read(data->regmap, RPR0521_REG_ID, &id);
846 dev_err(&data->client->dev, "Failed to read REG_ID register\n");
850 if (id != RPR0521_MANUFACT_ID) {
851 dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",
852 id, RPR0521_MANUFACT_ID);
856 /* set default measurement time - 100 ms for both ALS and PS */
857 ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
858 RPR0521_MODE_MEAS_TIME_MASK,
859 RPR0521_DEFAULT_MEAS_TIME);
861 pr_err("regmap_update_bits returned %d\n", ret);
866 ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
869 ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
874 data->irq_timestamp = 0;
879 static int rpr0521_poweroff(struct rpr0521_data *data)
884 ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
885 RPR0521_MODE_ALS_MASK |
886 RPR0521_MODE_PXS_MASK,
887 RPR0521_MODE_ALS_DISABLE |
888 RPR0521_MODE_PXS_DISABLE);
892 data->als_dev_en = false;
893 data->pxs_dev_en = false;
896 * Int pin keeps state after power off. Set pin to high impedance
897 * mode to prevent power drain.
899 ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, &tmp);
901 dev_err(&data->client->dev, "Failed to reset int pin.\n");
908 static bool rpr0521_is_volatile_reg(struct device *dev, unsigned int reg)
911 case RPR0521_REG_MODE_CTRL:
912 case RPR0521_REG_ALS_CTRL:
913 case RPR0521_REG_PXS_CTRL:
920 static const struct regmap_config rpr0521_regmap_config = {
921 .name = RPR0521_REGMAP_NAME,
926 .max_register = RPR0521_REG_ID,
927 .cache_type = REGCACHE_RBTREE,
928 .volatile_reg = rpr0521_is_volatile_reg,
931 static int rpr0521_probe(struct i2c_client *client,
932 const struct i2c_device_id *id)
934 struct rpr0521_data *data;
935 struct iio_dev *indio_dev;
936 struct regmap *regmap;
939 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
943 regmap = devm_regmap_init_i2c(client, &rpr0521_regmap_config);
944 if (IS_ERR(regmap)) {
945 dev_err(&client->dev, "regmap_init failed!\n");
946 return PTR_ERR(regmap);
949 data = iio_priv(indio_dev);
950 i2c_set_clientdata(client, indio_dev);
951 data->client = client;
952 data->regmap = regmap;
954 mutex_init(&data->lock);
956 indio_dev->dev.parent = &client->dev;
957 indio_dev->info = &rpr0521_info;
958 indio_dev->name = RPR0521_DRV_NAME;
959 indio_dev->channels = rpr0521_channels;
960 indio_dev->num_channels = ARRAY_SIZE(rpr0521_channels);
961 indio_dev->modes = INDIO_DIRECT_MODE;
963 ret = rpr0521_init(data);
965 dev_err(&client->dev, "rpr0521 chip init failed\n");
969 ret = pm_runtime_set_active(&client->dev);
973 pm_runtime_enable(&client->dev);
974 pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS);
975 pm_runtime_use_autosuspend(&client->dev);
978 * If sensor write/read is needed in _probe after _use_autosuspend,
979 * sensor needs to be _resumed first using rpr0521_set_power_state().
982 /* IRQ to trigger setup */
984 /* Trigger0 producer setup */
985 data->drdy_trigger0 = devm_iio_trigger_alloc(
986 indio_dev->dev.parent,
987 "%s-dev%d", indio_dev->name, indio_dev->id);
988 if (!data->drdy_trigger0) {
992 data->drdy_trigger0->dev.parent = indio_dev->dev.parent;
993 data->drdy_trigger0->ops = &rpr0521_trigger_ops;
994 indio_dev->available_scan_masks = rpr0521_available_scan_masks;
995 iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev);
997 /* Ties irq to trigger producer handler. */
998 ret = devm_request_threaded_irq(&client->dev, client->irq,
999 rpr0521_drdy_irq_handler, rpr0521_drdy_irq_thread,
1000 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1001 RPR0521_IRQ_NAME, indio_dev);
1003 dev_err(&client->dev, "request irq %d for trigger0 failed\n",
1005 goto err_pm_disable;
1008 ret = devm_iio_trigger_register(indio_dev->dev.parent,
1009 data->drdy_trigger0);
1011 dev_err(&client->dev, "iio trigger register failed\n");
1012 goto err_pm_disable;
1016 * Now whole pipe from physical interrupt (irq defined by
1017 * devicetree to device) to trigger0 output is set up.
1020 /* Trigger consumer setup */
1021 ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent,
1023 rpr0521_trigger_consumer_store_time,
1024 rpr0521_trigger_consumer_handler,
1025 &rpr0521_buffer_setup_ops);
1027 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1028 goto err_pm_disable;
1032 ret = iio_device_register(indio_dev);
1034 goto err_pm_disable;
1039 pm_runtime_disable(&client->dev);
1040 pm_runtime_set_suspended(&client->dev);
1041 pm_runtime_put_noidle(&client->dev);
1043 rpr0521_poweroff(data);
1048 static int rpr0521_remove(struct i2c_client *client)
1050 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1052 iio_device_unregister(indio_dev);
1054 pm_runtime_disable(&client->dev);
1055 pm_runtime_set_suspended(&client->dev);
1056 pm_runtime_put_noidle(&client->dev);
1058 rpr0521_poweroff(iio_priv(indio_dev));
1064 static int rpr0521_runtime_suspend(struct device *dev)
1066 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1067 struct rpr0521_data *data = iio_priv(indio_dev);
1070 mutex_lock(&data->lock);
1071 /* If measurements are enabled, enable them on resume */
1072 if (!data->als_need_dis)
1073 data->als_ps_need_en = data->als_dev_en;
1074 if (!data->pxs_need_dis)
1075 data->pxs_ps_need_en = data->pxs_dev_en;
1077 /* disable channels and sets {als,pxs}_dev_en to false */
1078 ret = rpr0521_poweroff(data);
1079 regcache_mark_dirty(data->regmap);
1080 mutex_unlock(&data->lock);
1085 static int rpr0521_runtime_resume(struct device *dev)
1087 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1088 struct rpr0521_data *data = iio_priv(indio_dev);
1091 regcache_sync(data->regmap);
1092 if (data->als_ps_need_en) {
1093 ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
1096 data->als_ps_need_en = false;
1099 if (data->pxs_ps_need_en) {
1100 ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
1103 data->pxs_ps_need_en = false;
1105 msleep(100); //wait for first measurement result
1111 static const struct dev_pm_ops rpr0521_pm_ops = {
1112 SET_RUNTIME_PM_OPS(rpr0521_runtime_suspend,
1113 rpr0521_runtime_resume, NULL)
1116 static const struct acpi_device_id rpr0521_acpi_match[] = {
1120 MODULE_DEVICE_TABLE(acpi, rpr0521_acpi_match);
1122 static const struct i2c_device_id rpr0521_id[] = {
1127 MODULE_DEVICE_TABLE(i2c, rpr0521_id);
1129 static struct i2c_driver rpr0521_driver = {
1131 .name = RPR0521_DRV_NAME,
1132 .pm = &rpr0521_pm_ops,
1133 .acpi_match_table = ACPI_PTR(rpr0521_acpi_match),
1135 .probe = rpr0521_probe,
1136 .remove = rpr0521_remove,
1137 .id_table = rpr0521_id,
1140 module_i2c_driver(rpr0521_driver);
1142 MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
1143 MODULE_DESCRIPTION("RPR0521 ROHM Ambient Light and Proximity Sensor driver");
1144 MODULE_LICENSE("GPL v2");