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_w8r16(st->us, ADE7753_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 ade7753_spi_read_reg_24(struct device *dev,
106 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
107 struct ade7753_state *st = iio_priv(indio_dev);
109 struct spi_transfer xfers[] = {
121 mutex_lock(&st->buf_lock);
122 st->tx[0] = ADE7753_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[0] << 16) | (st->rx[1] << 8) | st->rx[2];
133 mutex_unlock(&st->buf_lock);
137 static ssize_t ade7753_read_8bit(struct device *dev,
138 struct device_attribute *attr,
143 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
145 ret = ade7753_spi_read_reg_8(dev, this_attr->address, &val);
149 return sprintf(buf, "%u\n", val);
152 static ssize_t ade7753_read_16bit(struct device *dev,
153 struct device_attribute *attr,
158 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
160 ret = ade7753_spi_read_reg_16(dev, this_attr->address, &val);
164 return sprintf(buf, "%u\n", val);
167 static ssize_t ade7753_read_24bit(struct device *dev,
168 struct device_attribute *attr,
173 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
175 ret = ade7753_spi_read_reg_24(dev, this_attr->address, &val);
179 return sprintf(buf, "%u\n", val);
182 static ssize_t ade7753_write_8bit(struct device *dev,
183 struct device_attribute *attr,
187 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
191 ret = strict_strtol(buf, 10, &val);
194 ret = ade7753_spi_write_reg_8(dev, this_attr->address, val);
197 return ret ? ret : len;
200 static ssize_t ade7753_write_16bit(struct device *dev,
201 struct device_attribute *attr,
205 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
209 ret = strict_strtol(buf, 10, &val);
212 ret = ade7753_spi_write_reg_16(dev, this_attr->address, val);
215 return ret ? ret : len;
218 static int ade7753_reset(struct device *dev)
222 ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val);
223 val |= 1 << 6; /* Software Chip Reset */
225 return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val);
228 static ssize_t ade7753_write_reset(struct device *dev,
229 struct device_attribute *attr,
230 const char *buf, size_t len)
238 return ade7753_reset(dev);
243 static IIO_DEV_ATTR_AENERGY(ade7753_read_24bit, ADE7753_AENERGY);
244 static IIO_DEV_ATTR_LAENERGY(ade7753_read_24bit, ADE7753_LAENERGY);
245 static IIO_DEV_ATTR_VAENERGY(ade7753_read_24bit, ADE7753_VAENERGY);
246 static IIO_DEV_ATTR_LVAENERGY(ade7753_read_24bit, ADE7753_LVAENERGY);
247 static IIO_DEV_ATTR_CFDEN(S_IWUSR | S_IRUGO,
251 static IIO_DEV_ATTR_CFNUM(S_IWUSR | S_IRUGO,
255 static IIO_DEV_ATTR_CHKSUM(ade7753_read_8bit, ADE7753_CHKSUM);
256 static IIO_DEV_ATTR_PHCAL(S_IWUSR | S_IRUGO,
260 static IIO_DEV_ATTR_APOS(S_IWUSR | S_IRUGO,
264 static IIO_DEV_ATTR_SAGCYC(S_IWUSR | S_IRUGO,
268 static IIO_DEV_ATTR_SAGLVL(S_IWUSR | S_IRUGO,
272 static IIO_DEV_ATTR_LINECYC(S_IWUSR | S_IRUGO,
276 static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO,
280 static IIO_DEV_ATTR_IRMS(S_IWUSR | S_IRUGO,
284 static IIO_DEV_ATTR_VRMS(S_IRUGO,
288 static IIO_DEV_ATTR_IRMSOS(S_IWUSR | S_IRUGO,
292 static IIO_DEV_ATTR_VRMSOS(S_IWUSR | S_IRUGO,
296 static IIO_DEV_ATTR_WGAIN(S_IWUSR | S_IRUGO,
300 static IIO_DEV_ATTR_VAGAIN(S_IWUSR | S_IRUGO,
304 static IIO_DEV_ATTR_PGA_GAIN(S_IWUSR | S_IRUGO,
308 static IIO_DEV_ATTR_IPKLVL(S_IWUSR | S_IRUGO,
312 static IIO_DEV_ATTR_VPKLVL(S_IWUSR | S_IRUGO,
316 static IIO_DEV_ATTR_IPEAK(S_IRUGO,
320 static IIO_DEV_ATTR_VPEAK(S_IRUGO,
324 static IIO_DEV_ATTR_VPERIOD(S_IRUGO,
328 static IIO_DEV_ATTR_CH_OFF(1, S_IWUSR | S_IRUGO,
332 static IIO_DEV_ATTR_CH_OFF(2, S_IWUSR | S_IRUGO,
337 static int ade7753_set_irq(struct device *dev, bool enable)
341 ret = ade7753_spi_read_reg_8(dev, ADE7753_IRQEN, &irqen);
346 irqen |= 1 << 3; /* Enables an interrupt when a data is
347 present in the waveform register */
351 ret = ade7753_spi_write_reg_8(dev, ADE7753_IRQEN, irqen);
357 /* Power down the device */
358 static int ade7753_stop_device(struct device *dev)
362 ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val);
363 val |= 1 << 4; /* AD converters can be turned off */
365 return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val);
368 static int ade7753_initial_setup(struct iio_dev *indio_dev)
371 struct device *dev = &indio_dev->dev;
372 struct ade7753_state *st = iio_priv(indio_dev);
374 /* use low spi speed for init */
375 st->us->mode = SPI_MODE_3;
379 ret = ade7753_set_irq(dev, false);
381 dev_err(dev, "disable irq failed");
386 msleep(ADE7753_STARTUP_DELAY);
392 static ssize_t ade7753_read_frequency(struct device *dev,
393 struct device_attribute *attr,
399 ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, &t);
404 sps = 27900 / (1 + t);
406 len = sprintf(buf, "%d\n", sps);
410 static ssize_t ade7753_write_frequency(struct device *dev,
411 struct device_attribute *attr,
415 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
416 struct ade7753_state *st = iio_priv(indio_dev);
421 ret = strict_strtol(buf, 10, &val);
427 mutex_lock(&indio_dev->mlock);
434 st->us->max_speed_hz = ADE7753_SPI_SLOW;
436 st->us->max_speed_hz = ADE7753_SPI_FAST;
438 ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, ®);
445 ret = ade7753_spi_write_reg_16(dev, ADE7753_MODE, reg);
448 mutex_unlock(&indio_dev->mlock);
450 return ret ? ret : len;
453 static IIO_DEV_ATTR_TEMP_RAW(ade7753_read_8bit);
454 static IIO_CONST_ATTR(in_temp_offset, "-25 C");
455 static IIO_CONST_ATTR(in_temp_scale, "0.67 C");
457 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
458 ade7753_read_frequency,
459 ade7753_write_frequency);
461 static IIO_DEV_ATTR_RESET(ade7753_write_reset);
463 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500");
465 static struct attribute *ade7753_attributes[] = {
466 &iio_dev_attr_in_temp_raw.dev_attr.attr,
467 &iio_const_attr_in_temp_offset.dev_attr.attr,
468 &iio_const_attr_in_temp_scale.dev_attr.attr,
469 &iio_dev_attr_sampling_frequency.dev_attr.attr,
470 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
471 &iio_dev_attr_reset.dev_attr.attr,
472 &iio_dev_attr_phcal.dev_attr.attr,
473 &iio_dev_attr_cfden.dev_attr.attr,
474 &iio_dev_attr_aenergy.dev_attr.attr,
475 &iio_dev_attr_laenergy.dev_attr.attr,
476 &iio_dev_attr_vaenergy.dev_attr.attr,
477 &iio_dev_attr_lvaenergy.dev_attr.attr,
478 &iio_dev_attr_cfnum.dev_attr.attr,
479 &iio_dev_attr_apos.dev_attr.attr,
480 &iio_dev_attr_sagcyc.dev_attr.attr,
481 &iio_dev_attr_saglvl.dev_attr.attr,
482 &iio_dev_attr_linecyc.dev_attr.attr,
483 &iio_dev_attr_chksum.dev_attr.attr,
484 &iio_dev_attr_pga_gain.dev_attr.attr,
485 &iio_dev_attr_wgain.dev_attr.attr,
486 &iio_dev_attr_choff_1.dev_attr.attr,
487 &iio_dev_attr_choff_2.dev_attr.attr,
488 &iio_dev_attr_wdiv.dev_attr.attr,
489 &iio_dev_attr_irms.dev_attr.attr,
490 &iio_dev_attr_vrms.dev_attr.attr,
491 &iio_dev_attr_irmsos.dev_attr.attr,
492 &iio_dev_attr_vrmsos.dev_attr.attr,
493 &iio_dev_attr_vagain.dev_attr.attr,
494 &iio_dev_attr_ipklvl.dev_attr.attr,
495 &iio_dev_attr_vpklvl.dev_attr.attr,
496 &iio_dev_attr_ipeak.dev_attr.attr,
497 &iio_dev_attr_vpeak.dev_attr.attr,
498 &iio_dev_attr_vperiod.dev_attr.attr,
502 static const struct attribute_group ade7753_attribute_group = {
503 .attrs = ade7753_attributes,
506 static const struct iio_info ade7753_info = {
507 .attrs = &ade7753_attribute_group,
508 .driver_module = THIS_MODULE,
511 static int ade7753_probe(struct spi_device *spi)
514 struct ade7753_state *st;
515 struct iio_dev *indio_dev;
517 /* setup the industrialio driver allocated elements */
518 indio_dev = iio_device_alloc(sizeof(*st));
519 if (indio_dev == NULL) {
523 /* this is only used for removal purposes */
524 spi_set_drvdata(spi, indio_dev);
526 st = iio_priv(indio_dev);
528 mutex_init(&st->buf_lock);
530 indio_dev->name = spi->dev.driver->name;
531 indio_dev->dev.parent = &spi->dev;
532 indio_dev->info = &ade7753_info;
533 indio_dev->modes = INDIO_DIRECT_MODE;
535 /* Get the device into a sane initial state */
536 ret = ade7753_initial_setup(indio_dev);
540 ret = iio_device_register(indio_dev);
547 iio_device_free(indio_dev);
553 /* fixme, confirm ordering in this function */
554 static int ade7753_remove(struct spi_device *spi)
556 struct iio_dev *indio_dev = spi_get_drvdata(spi);
558 iio_device_unregister(indio_dev);
559 ade7753_stop_device(&indio_dev->dev);
560 iio_device_free(indio_dev);
565 static struct spi_driver ade7753_driver = {
568 .owner = THIS_MODULE,
570 .probe = ade7753_probe,
571 .remove = ade7753_remove,
573 module_spi_driver(ade7753_driver);
575 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
576 MODULE_DESCRIPTION("Analog Devices ADE7753/6 Single-Phase Multifunction Meter");
577 MODULE_LICENSE("GPL v2");
578 MODULE_ALIAS("spi:ade7753");