2 * ADE7753 Single-Phase Multifunction Metering IC with di/dt Sensor Interface
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 ade7753_spi_write_reg_8(struct device
*dev
,
31 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
32 struct ade7753_state
*st
= iio_priv(indio_dev
);
34 mutex_lock(&st
->buf_lock
);
35 st
->tx
[0] = ADE7753_WRITE_REG(reg_address
);
38 ret
= spi_write(st
->us
, st
->tx
, 2);
39 mutex_unlock(&st
->buf_lock
);
44 static int ade7753_spi_write_reg_16(struct device
*dev
,
49 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
50 struct ade7753_state
*st
= iio_priv(indio_dev
);
52 mutex_lock(&st
->buf_lock
);
53 st
->tx
[0] = ADE7753_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 ade7753_spi_read_reg_8(struct device
*dev
,
66 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
67 struct ade7753_state
*st
= iio_priv(indio_dev
);
70 ret
= spi_w8r8(st
->us
, ADE7753_READ_REG(reg_address
));
72 dev_err(&st
->us
->dev
, "problem when reading 8 bit register 0x%02X",
81 static int ade7753_spi_read_reg_16(struct device
*dev
,
85 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
86 struct ade7753_state
*st
= iio_priv(indio_dev
);
89 ret
= spi_w8r16be(st
->us
, ADE7753_READ_REG(reg_address
));
91 dev_err(&st
->us
->dev
, "problem when reading 16 bit register 0x%02X",
101 static int ade7753_spi_read_reg_24(struct device
*dev
,
105 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
106 struct ade7753_state
*st
= iio_priv(indio_dev
);
108 struct spi_transfer xfers
[] = {
120 mutex_lock(&st
->buf_lock
);
121 st
->tx
[0] = ADE7753_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
[0] << 16) | (st
->rx
[1] << 8) | st
->rx
[2];
132 mutex_unlock(&st
->buf_lock
);
136 static ssize_t
ade7753_read_8bit(struct device
*dev
,
137 struct device_attribute
*attr
,
142 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
144 ret
= ade7753_spi_read_reg_8(dev
, this_attr
->address
, &val
);
148 return sprintf(buf
, "%u\n", val
);
151 static ssize_t
ade7753_read_16bit(struct device
*dev
,
152 struct device_attribute
*attr
,
157 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
159 ret
= ade7753_spi_read_reg_16(dev
, this_attr
->address
, &val
);
163 return sprintf(buf
, "%u\n", val
);
166 static ssize_t
ade7753_read_24bit(struct device
*dev
,
167 struct device_attribute
*attr
,
172 struct iio_dev_attr
*this_attr
= to_iio_dev_attr(attr
);
174 ret
= ade7753_spi_read_reg_24(dev
, this_attr
->address
, &val
);
178 return sprintf(buf
, "%u\n", val
);
181 static ssize_t
ade7753_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
= ade7753_spi_write_reg_8(dev
, this_attr
->address
, val
);
196 return ret
? ret
: len
;
199 static ssize_t
ade7753_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
= ade7753_spi_write_reg_16(dev
, this_attr
->address
, val
);
214 return ret
? ret
: len
;
217 static int ade7753_reset(struct device
*dev
)
221 ade7753_spi_read_reg_16(dev
, ADE7753_MODE
, &val
);
222 val
|= BIT(6); /* Software Chip Reset */
224 return ade7753_spi_write_reg_16(dev
, ADE7753_MODE
, val
);
227 static IIO_DEV_ATTR_AENERGY(ade7753_read_24bit
, ADE7753_AENERGY
);
228 static IIO_DEV_ATTR_LAENERGY(ade7753_read_24bit
, ADE7753_LAENERGY
);
229 static IIO_DEV_ATTR_VAENERGY(ade7753_read_24bit
, ADE7753_VAENERGY
);
230 static IIO_DEV_ATTR_LVAENERGY(ade7753_read_24bit
, ADE7753_LVAENERGY
);
231 static IIO_DEV_ATTR_CFDEN(S_IWUSR
| S_IRUGO
,
235 static IIO_DEV_ATTR_CFNUM(S_IWUSR
| S_IRUGO
,
239 static IIO_DEV_ATTR_CHKSUM(ade7753_read_8bit
, ADE7753_CHKSUM
);
240 static IIO_DEV_ATTR_PHCAL(S_IWUSR
| S_IRUGO
,
244 static IIO_DEV_ATTR_APOS(S_IWUSR
| S_IRUGO
,
248 static IIO_DEV_ATTR_SAGCYC(S_IWUSR
| S_IRUGO
,
252 static IIO_DEV_ATTR_SAGLVL(S_IWUSR
| S_IRUGO
,
256 static IIO_DEV_ATTR_LINECYC(S_IWUSR
| S_IRUGO
,
260 static IIO_DEV_ATTR_WDIV(S_IWUSR
| S_IRUGO
,
264 static IIO_DEV_ATTR_IRMS(S_IWUSR
| S_IRUGO
,
268 static IIO_DEV_ATTR_VRMS(S_IRUGO
,
272 static IIO_DEV_ATTR_IRMSOS(S_IWUSR
| S_IRUGO
,
276 static IIO_DEV_ATTR_VRMSOS(S_IWUSR
| S_IRUGO
,
280 static IIO_DEV_ATTR_WGAIN(S_IWUSR
| S_IRUGO
,
284 static IIO_DEV_ATTR_VAGAIN(S_IWUSR
| S_IRUGO
,
288 static IIO_DEV_ATTR_PGA_GAIN(S_IWUSR
| S_IRUGO
,
292 static IIO_DEV_ATTR_IPKLVL(S_IWUSR
| S_IRUGO
,
296 static IIO_DEV_ATTR_VPKLVL(S_IWUSR
| S_IRUGO
,
300 static IIO_DEV_ATTR_IPEAK(S_IRUGO
,
304 static IIO_DEV_ATTR_VPEAK(S_IRUGO
,
308 static IIO_DEV_ATTR_VPERIOD(S_IRUGO
,
312 static IIO_DEV_ATTR_CH_OFF(1, S_IWUSR
| S_IRUGO
,
316 static IIO_DEV_ATTR_CH_OFF(2, S_IWUSR
| S_IRUGO
,
321 static int ade7753_set_irq(struct device
*dev
, bool enable
)
326 ret
= ade7753_spi_read_reg_8(dev
, ADE7753_IRQEN
, &irqen
);
331 irqen
|= BIT(3); /* Enables an interrupt when a data is
332 present in the waveform register */
336 ret
= ade7753_spi_write_reg_8(dev
, ADE7753_IRQEN
, irqen
);
342 /* Power down the device */
343 static int ade7753_stop_device(struct device
*dev
)
347 ade7753_spi_read_reg_16(dev
, ADE7753_MODE
, &val
);
348 val
|= BIT(4); /* AD converters can be turned off */
350 return ade7753_spi_write_reg_16(dev
, ADE7753_MODE
, val
);
353 static int ade7753_initial_setup(struct iio_dev
*indio_dev
)
356 struct device
*dev
= &indio_dev
->dev
;
357 struct ade7753_state
*st
= iio_priv(indio_dev
);
359 /* use low spi speed for init */
360 st
->us
->mode
= SPI_MODE_3
;
364 ret
= ade7753_set_irq(dev
, false);
366 dev_err(dev
, "disable irq failed");
371 msleep(ADE7753_STARTUP_DELAY
);
377 static ssize_t
ade7753_read_frequency(struct device
*dev
,
378 struct device_attribute
*attr
,
385 ret
= ade7753_spi_read_reg_16(dev
, ADE7753_MODE
, &t
);
390 sps
= 27900 / (1 + t
);
392 return sprintf(buf
, "%d\n", sps
);
395 static ssize_t
ade7753_write_frequency(struct device
*dev
,
396 struct device_attribute
*attr
,
400 struct iio_dev
*indio_dev
= dev_to_iio_dev(dev
);
401 struct ade7753_state
*st
= iio_priv(indio_dev
);
406 ret
= kstrtou16(buf
, 10, &val
);
412 mutex_lock(&indio_dev
->mlock
);
419 st
->us
->max_speed_hz
= ADE7753_SPI_SLOW
;
421 st
->us
->max_speed_hz
= ADE7753_SPI_FAST
;
423 ret
= ade7753_spi_read_reg_16(dev
, ADE7753_MODE
, ®
);
430 ret
= ade7753_spi_write_reg_16(dev
, ADE7753_MODE
, reg
);
433 mutex_unlock(&indio_dev
->mlock
);
435 return ret
? ret
: len
;
438 static IIO_DEV_ATTR_TEMP_RAW(ade7753_read_8bit
);
439 static IIO_CONST_ATTR(in_temp_offset
, "-25 C");
440 static IIO_CONST_ATTR(in_temp_scale
, "0.67 C");
442 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR
| S_IRUGO
,
443 ade7753_read_frequency
,
444 ade7753_write_frequency
);
446 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500");
448 static struct attribute
*ade7753_attributes
[] = {
449 &iio_dev_attr_in_temp_raw
.dev_attr
.attr
,
450 &iio_const_attr_in_temp_offset
.dev_attr
.attr
,
451 &iio_const_attr_in_temp_scale
.dev_attr
.attr
,
452 &iio_dev_attr_sampling_frequency
.dev_attr
.attr
,
453 &iio_const_attr_sampling_frequency_available
.dev_attr
.attr
,
454 &iio_dev_attr_phcal
.dev_attr
.attr
,
455 &iio_dev_attr_cfden
.dev_attr
.attr
,
456 &iio_dev_attr_aenergy
.dev_attr
.attr
,
457 &iio_dev_attr_laenergy
.dev_attr
.attr
,
458 &iio_dev_attr_vaenergy
.dev_attr
.attr
,
459 &iio_dev_attr_lvaenergy
.dev_attr
.attr
,
460 &iio_dev_attr_cfnum
.dev_attr
.attr
,
461 &iio_dev_attr_apos
.dev_attr
.attr
,
462 &iio_dev_attr_sagcyc
.dev_attr
.attr
,
463 &iio_dev_attr_saglvl
.dev_attr
.attr
,
464 &iio_dev_attr_linecyc
.dev_attr
.attr
,
465 &iio_dev_attr_chksum
.dev_attr
.attr
,
466 &iio_dev_attr_pga_gain
.dev_attr
.attr
,
467 &iio_dev_attr_wgain
.dev_attr
.attr
,
468 &iio_dev_attr_choff_1
.dev_attr
.attr
,
469 &iio_dev_attr_choff_2
.dev_attr
.attr
,
470 &iio_dev_attr_wdiv
.dev_attr
.attr
,
471 &iio_dev_attr_irms
.dev_attr
.attr
,
472 &iio_dev_attr_vrms
.dev_attr
.attr
,
473 &iio_dev_attr_irmsos
.dev_attr
.attr
,
474 &iio_dev_attr_vrmsos
.dev_attr
.attr
,
475 &iio_dev_attr_vagain
.dev_attr
.attr
,
476 &iio_dev_attr_ipklvl
.dev_attr
.attr
,
477 &iio_dev_attr_vpklvl
.dev_attr
.attr
,
478 &iio_dev_attr_ipeak
.dev_attr
.attr
,
479 &iio_dev_attr_vpeak
.dev_attr
.attr
,
480 &iio_dev_attr_vperiod
.dev_attr
.attr
,
484 static const struct attribute_group ade7753_attribute_group
= {
485 .attrs
= ade7753_attributes
,
488 static const struct iio_info ade7753_info
= {
489 .attrs
= &ade7753_attribute_group
,
490 .driver_module
= THIS_MODULE
,
493 static int ade7753_probe(struct spi_device
*spi
)
496 struct ade7753_state
*st
;
497 struct iio_dev
*indio_dev
;
499 /* setup the industrialio driver allocated elements */
500 indio_dev
= devm_iio_device_alloc(&spi
->dev
, sizeof(*st
));
503 /* this is only used for removal purposes */
504 spi_set_drvdata(spi
, indio_dev
);
506 st
= iio_priv(indio_dev
);
508 mutex_init(&st
->buf_lock
);
510 indio_dev
->name
= spi
->dev
.driver
->name
;
511 indio_dev
->dev
.parent
= &spi
->dev
;
512 indio_dev
->info
= &ade7753_info
;
513 indio_dev
->modes
= INDIO_DIRECT_MODE
;
515 /* Get the device into a sane initial state */
516 ret
= ade7753_initial_setup(indio_dev
);
520 return iio_device_register(indio_dev
);
523 /* fixme, confirm ordering in this function */
524 static int ade7753_remove(struct spi_device
*spi
)
526 struct iio_dev
*indio_dev
= spi_get_drvdata(spi
);
528 iio_device_unregister(indio_dev
);
529 ade7753_stop_device(&indio_dev
->dev
);
534 static struct spi_driver ade7753_driver
= {
538 .probe
= ade7753_probe
,
539 .remove
= ade7753_remove
,
541 module_spi_driver(ade7753_driver
);
543 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
544 MODULE_DESCRIPTION("Analog Devices ADE7753/6 Single-Phase Multifunction Meter");
545 MODULE_LICENSE("GPL v2");
546 MODULE_ALIAS("spi:ade7753");