2 * ADE7754 Polyphase Multifunction Energy Metering IC Driver
4 * Copyright 2010 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/delay.h>
12 #include <linux/mutex.h>
13 #include <linux/device.h>
14 #include <linux/kernel.h>
15 #include <linux/spi/spi.h>
16 #include <linux/slab.h>
17 #include <linux/sysfs.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
21 #include <linux/iio/iio.h>
22 #include <linux/iio/sysfs.h>
26 static int ade7754_spi_write_reg_8(struct device
*dev
,
31 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
32 struct ade7754_state
*st
= iio_priv(indio_dev
);
34 mutex_lock(&st
->buf_lock
);
35 st
->tx
[0] = ADE7754_WRITE_REG(reg_address
);
38 ret
= spi_write(st
->us
, st
->tx
, 2);
39 mutex_unlock(&st
->buf_lock
);
44 static int ade7754_spi_write_reg_16(struct device
*dev
,
49 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
50 struct ade7754_state
*st
= iio_priv(indio_dev
);
52 mutex_lock(&st
->buf_lock
);
53 st
->tx
[0] = ADE7754_WRITE_REG(reg_address
);
54 st
->tx
[1] = (value
>> 8) & 0xFF;
55 st
->tx
[2] = value
& 0xFF;
56 ret
= spi_write(st
->us
, st
->tx
, 3);
57 mutex_unlock(&st
->buf_lock
);
62 static int ade7754_spi_read_reg_8(struct device
*dev
,
66 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
67 struct ade7754_state
*st
= iio_priv(indio_dev
);
70 ret
= spi_w8r8(st
->us
, ADE7754_READ_REG(reg_address
));
72 dev_err(&st
->us
->dev
, "problem when reading 8 bit register 0x%02X",
81 static int ade7754_spi_read_reg_16(struct device
*dev
,
85 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
86 struct ade7754_state
*st
= iio_priv(indio_dev
);
89 ret
= spi_w8r16(st
->us
, ADE7754_READ_REG(reg_address
));
91 dev_err(&st
->us
->dev
, "problem when reading 16 bit register 0x%02X",
97 *val
= be16_to_cpup(val
);
102 static int ade7754_spi_read_reg_24(struct device
*dev
,
106 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
107 struct ade7754_state
*st
= iio_priv(indio_dev
);
109 struct spi_transfer xfers
[] = {
118 mutex_lock(&st
->buf_lock
);
119 st
->tx
[0] = ADE7754_READ_REG(reg_address
);
124 ret
= spi_sync_transfer(st
->us
, xfers
, ARRAY_SIZE(xfers
));
126 dev_err(&st
->us
->dev
, "problem when reading 24 bit register 0x%02X",
130 *val
= (st
->rx
[1] << 16) | (st
->rx
[2] << 8) | st
->rx
[3];
133 mutex_unlock(&st
->buf_lock
);
137 static ssize_t
ade7754_read_8bit(struct device
*dev
,
138 struct device_attribute
*attr
,
143 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
145 ret
= ade7754_spi_read_reg_8(dev
, this_attr
->address
, &val
);
149 return sprintf(buf
, "%u\n", val
);
152 static ssize_t
ade7754_read_16bit(struct device
*dev
,
153 struct device_attribute
*attr
,
158 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
160 ret
= ade7754_spi_read_reg_16(dev
, this_attr
->address
, &val
);
164 return sprintf(buf
, "%u\n", val
);
167 static ssize_t
ade7754_read_24bit(struct device
*dev
,
168 struct device_attribute
*attr
,
173 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
175 ret
= ade7754_spi_read_reg_24(dev
, this_attr
->address
, &val
);
179 return sprintf(buf
, "%u\n", val
& 0xFFFFFF);
182 static ssize_t
ade7754_write_8bit(struct device
*dev
,
183 struct device_attribute
*attr
,
187 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
191 ret
= kstrtou8(buf
, 10, &val
);
194 ret
= ade7754_spi_write_reg_8(dev
, this_attr
->address
, val
);
197 return ret
? ret
: len
;
200 static ssize_t
ade7754_write_16bit(struct device
*dev
,
201 struct device_attribute
*attr
,
205 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
209 ret
= kstrtou16(buf
, 10, &val
);
212 ret
= ade7754_spi_write_reg_16(dev
, this_attr
->address
, val
);
215 return ret
? ret
: len
;
218 static int ade7754_reset(struct device
*dev
)
222 ade7754_spi_read_reg_8(dev
, ADE7754_OPMODE
, &val
);
223 val
|= 1 << 6; /* Software Chip Reset */
224 return ade7754_spi_write_reg_8(dev
, ADE7754_OPMODE
, val
);
227 static IIO_DEV_ATTR_AENERGY(ade7754_read_24bit
, ADE7754_AENERGY
);
228 static IIO_DEV_ATTR_LAENERGY(ade7754_read_24bit
, ADE7754_LAENERGY
);
229 static IIO_DEV_ATTR_VAENERGY(ade7754_read_24bit
, ADE7754_VAENERGY
);
230 static IIO_DEV_ATTR_LVAENERGY(ade7754_read_24bit
, ADE7754_LVAENERGY
);
231 static IIO_DEV_ATTR_VPEAK(S_IWUSR
| S_IRUGO
,
235 static IIO_DEV_ATTR_IPEAK(S_IWUSR
| S_IRUGO
,
239 static IIO_DEV_ATTR_APHCAL(S_IWUSR
| S_IRUGO
,
243 static IIO_DEV_ATTR_BPHCAL(S_IWUSR
| S_IRUGO
,
247 static IIO_DEV_ATTR_CPHCAL(S_IWUSR
| S_IRUGO
,
251 static IIO_DEV_ATTR_AAPOS(S_IWUSR
| S_IRUGO
,
255 static IIO_DEV_ATTR_BAPOS(S_IWUSR
| S_IRUGO
,
259 static IIO_DEV_ATTR_CAPOS(S_IWUSR
| S_IRUGO
,
263 static IIO_DEV_ATTR_WDIV(S_IWUSR
| S_IRUGO
,
267 static IIO_DEV_ATTR_VADIV(S_IWUSR
| S_IRUGO
,
271 static IIO_DEV_ATTR_CFNUM(S_IWUSR
| S_IRUGO
,
275 static IIO_DEV_ATTR_CFDEN(S_IWUSR
| S_IRUGO
,
279 static IIO_DEV_ATTR_ACTIVE_POWER_A_GAIN(S_IWUSR
| S_IRUGO
,
283 static IIO_DEV_ATTR_ACTIVE_POWER_B_GAIN(S_IWUSR
| S_IRUGO
,
287 static IIO_DEV_ATTR_ACTIVE_POWER_C_GAIN(S_IWUSR
| S_IRUGO
,
291 static IIO_DEV_ATTR_AIRMS(S_IRUGO
,
295 static IIO_DEV_ATTR_BIRMS(S_IRUGO
,
299 static IIO_DEV_ATTR_CIRMS(S_IRUGO
,
303 static IIO_DEV_ATTR_AVRMS(S_IRUGO
,
307 static IIO_DEV_ATTR_BVRMS(S_IRUGO
,
311 static IIO_DEV_ATTR_CVRMS(S_IRUGO
,
315 static IIO_DEV_ATTR_AIRMSOS(S_IRUGO
,
319 static IIO_DEV_ATTR_BIRMSOS(S_IRUGO
,
323 static IIO_DEV_ATTR_CIRMSOS(S_IRUGO
,
327 static IIO_DEV_ATTR_AVRMSOS(S_IRUGO
,
331 static IIO_DEV_ATTR_BVRMSOS(S_IRUGO
,
335 static IIO_DEV_ATTR_CVRMSOS(S_IRUGO
,
340 static int ade7754_set_irq(struct device
*dev
, bool enable
)
344 ret
= ade7754_spi_read_reg_16(dev
, ADE7754_IRQEN
, &irqen
);
349 irqen
|= 1 << 14; /* Enables an interrupt when a data is
350 present in the waveform register */
354 ret
= ade7754_spi_write_reg_16(dev
, ADE7754_IRQEN
, irqen
);
362 /* Power down the device */
363 static int ade7754_stop_device(struct device
*dev
)
367 ade7754_spi_read_reg_8(dev
, ADE7754_OPMODE
, &val
);
368 val
|= 7 << 3; /* ADE7754 powered down */
369 return ade7754_spi_write_reg_8(dev
, ADE7754_OPMODE
, val
);
372 static int ade7754_initial_setup(struct iio_dev
*indio_dev
)
375 struct ade7754_state
*st
= iio_priv(indio_dev
);
376 struct device
*dev
= &indio_dev
->dev
;
378 /* use low spi speed for init */
379 st
->us
->mode
= SPI_MODE_3
;
383 ret
= ade7754_set_irq(dev
, false);
385 dev_err(dev
, "disable irq failed");
390 msleep(ADE7754_STARTUP_DELAY
);
396 static ssize_t
ade7754_read_frequency(struct device
*dev
,
397 struct device_attribute
*attr
,
403 ret
= ade7754_spi_read_reg_8(dev
,
410 sps
= 26000 / (1 + t
);
412 return sprintf(buf
, "%d\n", sps
);
415 static ssize_t
ade7754_write_frequency(struct device
*dev
,
416 struct device_attribute
*attr
,
420 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
421 struct ade7754_state
*st
= iio_priv(indio_dev
);
426 ret
= kstrtou16(buf
, 10, &val
);
432 mutex_lock(&indio_dev
->mlock
);
439 st
->us
->max_speed_hz
= ADE7754_SPI_SLOW
;
441 st
->us
->max_speed_hz
= ADE7754_SPI_FAST
;
443 ret
= ade7754_spi_read_reg_8(dev
, ADE7754_WAVMODE
, ®
);
450 ret
= ade7754_spi_write_reg_8(dev
, ADE7754_WAVMODE
, reg
);
453 mutex_unlock(&indio_dev
->mlock
);
455 return ret
? ret
: len
;
457 static IIO_DEV_ATTR_TEMP_RAW(ade7754_read_8bit
);
458 static IIO_CONST_ATTR(in_temp_offset
, "129 C");
459 static IIO_CONST_ATTR(in_temp_scale
, "4 C");
461 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR
| S_IRUGO
,
462 ade7754_read_frequency
,
463 ade7754_write_frequency
);
465 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000");
467 static struct attribute
*ade7754_attributes
[] = {
468 &iio_dev_attr_in_temp_raw
.dev_attr
.attr
,
469 &iio_const_attr_in_temp_offset
.dev_attr
.attr
,
470 &iio_const_attr_in_temp_scale
.dev_attr
.attr
,
471 &iio_dev_attr_sampling_frequency
.dev_attr
.attr
,
472 &iio_const_attr_sampling_frequency_available
.dev_attr
.attr
,
473 &iio_dev_attr_aenergy
.dev_attr
.attr
,
474 &iio_dev_attr_laenergy
.dev_attr
.attr
,
475 &iio_dev_attr_vaenergy
.dev_attr
.attr
,
476 &iio_dev_attr_lvaenergy
.dev_attr
.attr
,
477 &iio_dev_attr_vpeak
.dev_attr
.attr
,
478 &iio_dev_attr_ipeak
.dev_attr
.attr
,
479 &iio_dev_attr_aphcal
.dev_attr
.attr
,
480 &iio_dev_attr_bphcal
.dev_attr
.attr
,
481 &iio_dev_attr_cphcal
.dev_attr
.attr
,
482 &iio_dev_attr_aapos
.dev_attr
.attr
,
483 &iio_dev_attr_bapos
.dev_attr
.attr
,
484 &iio_dev_attr_capos
.dev_attr
.attr
,
485 &iio_dev_attr_wdiv
.dev_attr
.attr
,
486 &iio_dev_attr_vadiv
.dev_attr
.attr
,
487 &iio_dev_attr_cfnum
.dev_attr
.attr
,
488 &iio_dev_attr_cfden
.dev_attr
.attr
,
489 &iio_dev_attr_active_power_a_gain
.dev_attr
.attr
,
490 &iio_dev_attr_active_power_b_gain
.dev_attr
.attr
,
491 &iio_dev_attr_active_power_c_gain
.dev_attr
.attr
,
492 &iio_dev_attr_airms
.dev_attr
.attr
,
493 &iio_dev_attr_birms
.dev_attr
.attr
,
494 &iio_dev_attr_cirms
.dev_attr
.attr
,
495 &iio_dev_attr_avrms
.dev_attr
.attr
,
496 &iio_dev_attr_bvrms
.dev_attr
.attr
,
497 &iio_dev_attr_cvrms
.dev_attr
.attr
,
498 &iio_dev_attr_airmsos
.dev_attr
.attr
,
499 &iio_dev_attr_birmsos
.dev_attr
.attr
,
500 &iio_dev_attr_cirmsos
.dev_attr
.attr
,
501 &iio_dev_attr_avrmsos
.dev_attr
.attr
,
502 &iio_dev_attr_bvrmsos
.dev_attr
.attr
,
503 &iio_dev_attr_cvrmsos
.dev_attr
.attr
,
507 static const struct attribute_group ade7754_attribute_group
= {
508 .attrs
= ade7754_attributes
,
511 static const struct iio_info ade7754_info
= {
512 .attrs
= &ade7754_attribute_group
,
513 .driver_module
= THIS_MODULE
,
516 static int ade7754_probe(struct spi_device
*spi
)
519 struct ade7754_state
*st
;
520 struct iio_dev
*indio_dev
;
522 /* setup the industrialio driver allocated elements */
523 indio_dev
= devm_iio_device_alloc(&spi
->dev
, sizeof(*st
));
526 /* this is only used for removal purposes */
527 spi_set_drvdata(spi
, indio_dev
);
529 st
= iio_priv(indio_dev
);
531 mutex_init(&st
->buf_lock
);
533 indio_dev
->name
= spi
->dev
.driver
->name
;
534 indio_dev
->dev
.parent
= &spi
->dev
;
535 indio_dev
->info
= &ade7754_info
;
536 indio_dev
->modes
= INDIO_DIRECT_MODE
;
538 /* Get the device into a sane initial state */
539 ret
= ade7754_initial_setup(indio_dev
);
542 ret
= iio_device_register(indio_dev
);
549 /* fixme, confirm ordering in this function */
550 static int ade7754_remove(struct spi_device
*spi
)
552 struct iio_dev
*indio_dev
= spi_get_drvdata(spi
);
554 iio_device_unregister(indio_dev
);
555 ade7754_stop_device(&indio_dev
->dev
);
560 static struct spi_driver ade7754_driver
= {
563 .owner
= THIS_MODULE
,
565 .probe
= ade7754_probe
,
566 .remove
= ade7754_remove
,
568 module_spi_driver(ade7754_driver
);
570 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
571 MODULE_DESCRIPTION("Analog Devices ADE7754 Polyphase Multifunction Energy Metering IC Driver");
572 MODULE_LICENSE("GPL v2");
573 MODULE_ALIAS("spi:ad7754");