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");