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_w8r16be(st
->us
, ADE7754_READ_REG(reg_address
));
91 dev_err(&st
->us
->dev
, "problem when reading 16 bit register 0x%02X",
101 static int ade7754_spi_read_reg_24(struct device
*dev
,
105 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
106 struct ade7754_state
*st
= iio_priv(indio_dev
);
108 struct spi_transfer xfers
[] = {
117 mutex_lock(&st
->buf_lock
);
118 st
->tx
[0] = ADE7754_READ_REG(reg_address
);
123 ret
= spi_sync_transfer(st
->us
, xfers
, ARRAY_SIZE(xfers
));
125 dev_err(&st
->us
->dev
, "problem when reading 24 bit register 0x%02X",
129 *val
= (st
->rx
[1] << 16) | (st
->rx
[2] << 8) | st
->rx
[3];
132 mutex_unlock(&st
->buf_lock
);
136 static ssize_t
ade7754_read_8bit(struct device
*dev
,
137 struct device_attribute
*attr
,
142 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
144 ret
= ade7754_spi_read_reg_8(dev
, this_attr
->address
, &val
);
148 return sprintf(buf
, "%u\n", val
);
151 static ssize_t
ade7754_read_16bit(struct device
*dev
,
152 struct device_attribute
*attr
,
157 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
159 ret
= ade7754_spi_read_reg_16(dev
, this_attr
->address
, &val
);
163 return sprintf(buf
, "%u\n", val
);
166 static ssize_t
ade7754_read_24bit(struct device
*dev
,
167 struct device_attribute
*attr
,
172 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
174 ret
= ade7754_spi_read_reg_24(dev
, this_attr
->address
, &val
);
178 return sprintf(buf
, "%u\n", val
& 0xFFFFFF);
181 static ssize_t
ade7754_write_8bit(struct device
*dev
,
182 struct device_attribute
*attr
,
186 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
190 ret
= kstrtou8(buf
, 10, &val
);
193 ret
= ade7754_spi_write_reg_8(dev
, this_attr
->address
, val
);
196 return ret
? ret
: len
;
199 static ssize_t
ade7754_write_16bit(struct device
*dev
,
200 struct device_attribute
*attr
,
204 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
208 ret
= kstrtou16(buf
, 10, &val
);
211 ret
= ade7754_spi_write_reg_16(dev
, this_attr
->address
, val
);
214 return ret
? ret
: len
;
217 static int ade7754_reset(struct device
*dev
)
221 ade7754_spi_read_reg_8(dev
, ADE7754_OPMODE
, &val
);
222 val
|= 1 << 6; /* Software Chip Reset */
223 return ade7754_spi_write_reg_8(dev
, ADE7754_OPMODE
, val
);
226 static IIO_DEV_ATTR_AENERGY(ade7754_read_24bit
, ADE7754_AENERGY
);
227 static IIO_DEV_ATTR_LAENERGY(ade7754_read_24bit
, ADE7754_LAENERGY
);
228 static IIO_DEV_ATTR_VAENERGY(ade7754_read_24bit
, ADE7754_VAENERGY
);
229 static IIO_DEV_ATTR_LVAENERGY(ade7754_read_24bit
, ADE7754_LVAENERGY
);
230 static IIO_DEV_ATTR_VPEAK(S_IWUSR
| S_IRUGO
,
234 static IIO_DEV_ATTR_IPEAK(S_IWUSR
| S_IRUGO
,
238 static IIO_DEV_ATTR_APHCAL(S_IWUSR
| S_IRUGO
,
242 static IIO_DEV_ATTR_BPHCAL(S_IWUSR
| S_IRUGO
,
246 static IIO_DEV_ATTR_CPHCAL(S_IWUSR
| S_IRUGO
,
250 static IIO_DEV_ATTR_AAPOS(S_IWUSR
| S_IRUGO
,
254 static IIO_DEV_ATTR_BAPOS(S_IWUSR
| S_IRUGO
,
258 static IIO_DEV_ATTR_CAPOS(S_IWUSR
| S_IRUGO
,
262 static IIO_DEV_ATTR_WDIV(S_IWUSR
| S_IRUGO
,
266 static IIO_DEV_ATTR_VADIV(S_IWUSR
| S_IRUGO
,
270 static IIO_DEV_ATTR_CFNUM(S_IWUSR
| S_IRUGO
,
274 static IIO_DEV_ATTR_CFDEN(S_IWUSR
| S_IRUGO
,
278 static IIO_DEV_ATTR_ACTIVE_POWER_A_GAIN(S_IWUSR
| S_IRUGO
,
282 static IIO_DEV_ATTR_ACTIVE_POWER_B_GAIN(S_IWUSR
| S_IRUGO
,
286 static IIO_DEV_ATTR_ACTIVE_POWER_C_GAIN(S_IWUSR
| S_IRUGO
,
290 static IIO_DEV_ATTR_AIRMS(S_IRUGO
,
294 static IIO_DEV_ATTR_BIRMS(S_IRUGO
,
298 static IIO_DEV_ATTR_CIRMS(S_IRUGO
,
302 static IIO_DEV_ATTR_AVRMS(S_IRUGO
,
306 static IIO_DEV_ATTR_BVRMS(S_IRUGO
,
310 static IIO_DEV_ATTR_CVRMS(S_IRUGO
,
314 static IIO_DEV_ATTR_AIRMSOS(S_IRUGO
,
318 static IIO_DEV_ATTR_BIRMSOS(S_IRUGO
,
322 static IIO_DEV_ATTR_CIRMSOS(S_IRUGO
,
326 static IIO_DEV_ATTR_AVRMSOS(S_IRUGO
,
330 static IIO_DEV_ATTR_BVRMSOS(S_IRUGO
,
334 static IIO_DEV_ATTR_CVRMSOS(S_IRUGO
,
339 static int ade7754_set_irq(struct device
*dev
, bool enable
)
343 ret
= ade7754_spi_read_reg_16(dev
, ADE7754_IRQEN
, &irqen
);
348 irqen
|= 1 << 14; /* Enables an interrupt when a data is
349 present in the waveform register */
353 ret
= ade7754_spi_write_reg_16(dev
, ADE7754_IRQEN
, irqen
);
361 /* Power down the device */
362 static int ade7754_stop_device(struct device
*dev
)
366 ade7754_spi_read_reg_8(dev
, ADE7754_OPMODE
, &val
);
367 val
|= 7 << 3; /* ADE7754 powered down */
368 return ade7754_spi_write_reg_8(dev
, ADE7754_OPMODE
, val
);
371 static int ade7754_initial_setup(struct iio_dev
*indio_dev
)
374 struct ade7754_state
*st
= iio_priv(indio_dev
);
375 struct device
*dev
= &indio_dev
->dev
;
377 /* use low spi speed for init */
378 st
->us
->mode
= SPI_MODE_3
;
382 ret
= ade7754_set_irq(dev
, false);
384 dev_err(dev
, "disable irq failed");
389 msleep(ADE7754_STARTUP_DELAY
);
395 static ssize_t
ade7754_read_frequency(struct device
*dev
,
396 struct device_attribute
*attr
,
402 ret
= ade7754_spi_read_reg_8(dev
,
409 sps
= 26000 / (1 + t
);
411 return sprintf(buf
, "%d\n", sps
);
414 static ssize_t
ade7754_write_frequency(struct device
*dev
,
415 struct device_attribute
*attr
,
419 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
420 struct ade7754_state
*st
= iio_priv(indio_dev
);
425 ret
= kstrtou16(buf
, 10, &val
);
431 mutex_lock(&indio_dev
->mlock
);
438 st
->us
->max_speed_hz
= ADE7754_SPI_SLOW
;
440 st
->us
->max_speed_hz
= ADE7754_SPI_FAST
;
442 ret
= ade7754_spi_read_reg_8(dev
, ADE7754_WAVMODE
, ®
);
449 ret
= ade7754_spi_write_reg_8(dev
, ADE7754_WAVMODE
, reg
);
452 mutex_unlock(&indio_dev
->mlock
);
454 return ret
? ret
: len
;
456 static IIO_DEV_ATTR_TEMP_RAW(ade7754_read_8bit
);
457 static IIO_CONST_ATTR(in_temp_offset
, "129 C");
458 static IIO_CONST_ATTR(in_temp_scale
, "4 C");
460 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR
| S_IRUGO
,
461 ade7754_read_frequency
,
462 ade7754_write_frequency
);
464 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000");
466 static struct attribute
*ade7754_attributes
[] = {
467 &iio_dev_attr_in_temp_raw
.dev_attr
.attr
,
468 &iio_const_attr_in_temp_offset
.dev_attr
.attr
,
469 &iio_const_attr_in_temp_scale
.dev_attr
.attr
,
470 &iio_dev_attr_sampling_frequency
.dev_attr
.attr
,
471 &iio_const_attr_sampling_frequency_available
.dev_attr
.attr
,
472 &iio_dev_attr_aenergy
.dev_attr
.attr
,
473 &iio_dev_attr_laenergy
.dev_attr
.attr
,
474 &iio_dev_attr_vaenergy
.dev_attr
.attr
,
475 &iio_dev_attr_lvaenergy
.dev_attr
.attr
,
476 &iio_dev_attr_vpeak
.dev_attr
.attr
,
477 &iio_dev_attr_ipeak
.dev_attr
.attr
,
478 &iio_dev_attr_aphcal
.dev_attr
.attr
,
479 &iio_dev_attr_bphcal
.dev_attr
.attr
,
480 &iio_dev_attr_cphcal
.dev_attr
.attr
,
481 &iio_dev_attr_aapos
.dev_attr
.attr
,
482 &iio_dev_attr_bapos
.dev_attr
.attr
,
483 &iio_dev_attr_capos
.dev_attr
.attr
,
484 &iio_dev_attr_wdiv
.dev_attr
.attr
,
485 &iio_dev_attr_vadiv
.dev_attr
.attr
,
486 &iio_dev_attr_cfnum
.dev_attr
.attr
,
487 &iio_dev_attr_cfden
.dev_attr
.attr
,
488 &iio_dev_attr_active_power_a_gain
.dev_attr
.attr
,
489 &iio_dev_attr_active_power_b_gain
.dev_attr
.attr
,
490 &iio_dev_attr_active_power_c_gain
.dev_attr
.attr
,
491 &iio_dev_attr_airms
.dev_attr
.attr
,
492 &iio_dev_attr_birms
.dev_attr
.attr
,
493 &iio_dev_attr_cirms
.dev_attr
.attr
,
494 &iio_dev_attr_avrms
.dev_attr
.attr
,
495 &iio_dev_attr_bvrms
.dev_attr
.attr
,
496 &iio_dev_attr_cvrms
.dev_attr
.attr
,
497 &iio_dev_attr_airmsos
.dev_attr
.attr
,
498 &iio_dev_attr_birmsos
.dev_attr
.attr
,
499 &iio_dev_attr_cirmsos
.dev_attr
.attr
,
500 &iio_dev_attr_avrmsos
.dev_attr
.attr
,
501 &iio_dev_attr_bvrmsos
.dev_attr
.attr
,
502 &iio_dev_attr_cvrmsos
.dev_attr
.attr
,
506 static const struct attribute_group ade7754_attribute_group
= {
507 .attrs
= ade7754_attributes
,
510 static const struct iio_info ade7754_info
= {
511 .attrs
= &ade7754_attribute_group
,
512 .driver_module
= THIS_MODULE
,
515 static int ade7754_probe(struct spi_device
*spi
)
518 struct ade7754_state
*st
;
519 struct iio_dev
*indio_dev
;
521 /* setup the industrialio driver allocated elements */
522 indio_dev
= devm_iio_device_alloc(&spi
->dev
, sizeof(*st
));
525 /* this is only used for removal purposes */
526 spi_set_drvdata(spi
, indio_dev
);
528 st
= iio_priv(indio_dev
);
530 mutex_init(&st
->buf_lock
);
532 indio_dev
->name
= spi
->dev
.driver
->name
;
533 indio_dev
->dev
.parent
= &spi
->dev
;
534 indio_dev
->info
= &ade7754_info
;
535 indio_dev
->modes
= INDIO_DIRECT_MODE
;
537 /* Get the device into a sane initial state */
538 ret
= ade7754_initial_setup(indio_dev
);
541 ret
= iio_device_register(indio_dev
);
548 /* fixme, confirm ordering in this function */
549 static int ade7754_remove(struct spi_device
*spi
)
551 struct iio_dev
*indio_dev
= spi_get_drvdata(spi
);
553 iio_device_unregister(indio_dev
);
554 ade7754_stop_device(&indio_dev
->dev
);
559 static struct spi_driver ade7754_driver
= {
562 .owner
= THIS_MODULE
,
564 .probe
= ade7754_probe
,
565 .remove
= ade7754_remove
,
567 module_spi_driver(ade7754_driver
);
569 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
570 MODULE_DESCRIPTION("Analog Devices ADE7754 Polyphase Multifunction Energy Metering IC Driver");
571 MODULE_LICENSE("GPL v2");
572 MODULE_ALIAS("spi:ad7754");