1 /*
2 * ADE7854/58/68/78 Polyphase Multifunction Energy Metering IC Driver
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
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/slab.h>
16 #include <linux/sysfs.h>
17 #include <linux/list.h>
18 #include <linux/module.h>
19
20 #include <linux/iio/iio.h>
21 #include <linux/iio/sysfs.h>
22 #include "meter.h"
23 #include "ade7854.h"
24
ade7854_read_8bit(struct device * dev,struct device_attribute * attr,char * buf)25 static ssize_t ade7854_read_8bit(struct device *dev,
26 struct device_attribute *attr,
27 char *buf)
28 {
29 int ret;
30 u8 val = 0;
31 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
32 struct ade7854_state *st = iio_priv(indio_dev);
33 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
34
35 ret = st->read_reg_8(dev, this_attr->address, &val);
36 if (ret)
37 return ret;
38
39 return sprintf(buf, "%u\n", val);
40 }
41
ade7854_read_16bit(struct device * dev,struct device_attribute * attr,char * buf)42 static ssize_t ade7854_read_16bit(struct device *dev,
43 struct device_attribute *attr,
44 char *buf)
45 {
46 int ret;
47 u16 val = 0;
48 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
49 struct ade7854_state *st = iio_priv(indio_dev);
50 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
51
52 ret = st->read_reg_16(dev, this_attr->address, &val);
53 if (ret)
54 return ret;
55
56 return sprintf(buf, "%u\n", val);
57 }
58
ade7854_read_24bit(struct device * dev,struct device_attribute * attr,char * buf)59 static ssize_t ade7854_read_24bit(struct device *dev,
60 struct device_attribute *attr,
61 char *buf)
62 {
63 int ret;
64 u32 val;
65 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
66 struct ade7854_state *st = iio_priv(indio_dev);
67 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
68
69 ret = st->read_reg_24(dev, this_attr->address, &val);
70 if (ret)
71 return ret;
72
73 return sprintf(buf, "%u\n", val);
74 }
75
ade7854_read_32bit(struct device * dev,struct device_attribute * attr,char * buf)76 static ssize_t ade7854_read_32bit(struct device *dev,
77 struct device_attribute *attr,
78 char *buf)
79 {
80 int ret;
81 u32 val = 0;
82 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
83 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
84 struct ade7854_state *st = iio_priv(indio_dev);
85
86 ret = st->read_reg_32(dev, this_attr->address, &val);
87 if (ret)
88 return ret;
89
90 return sprintf(buf, "%u\n", val);
91 }
92
ade7854_write_8bit(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)93 static ssize_t ade7854_write_8bit(struct device *dev,
94 struct device_attribute *attr,
95 const char *buf,
96 size_t len)
97 {
98 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
99 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
100 struct ade7854_state *st = iio_priv(indio_dev);
101
102 int ret;
103 u8 val;
104
105 ret = kstrtou8(buf, 10, &val);
106 if (ret)
107 goto error_ret;
108 ret = st->write_reg_8(dev, this_attr->address, val);
109
110 error_ret:
111 return ret ? ret : len;
112 }
113
ade7854_write_16bit(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)114 static ssize_t ade7854_write_16bit(struct device *dev,
115 struct device_attribute *attr,
116 const char *buf,
117 size_t len)
118 {
119 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
120 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
121 struct ade7854_state *st = iio_priv(indio_dev);
122
123 int ret;
124 u16 val;
125
126 ret = kstrtou16(buf, 10, &val);
127 if (ret)
128 goto error_ret;
129 ret = st->write_reg_16(dev, this_attr->address, val);
130
131 error_ret:
132 return ret ? ret : len;
133 }
134
ade7854_write_24bit(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)135 static ssize_t ade7854_write_24bit(struct device *dev,
136 struct device_attribute *attr,
137 const char *buf,
138 size_t len)
139 {
140 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
141 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
142 struct ade7854_state *st = iio_priv(indio_dev);
143
144 int ret;
145 u32 val;
146
147 ret = kstrtou32(buf, 10, &val);
148 if (ret)
149 goto error_ret;
150 ret = st->write_reg_24(dev, this_attr->address, val);
151
152 error_ret:
153 return ret ? ret : len;
154 }
155
ade7854_write_32bit(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)156 static ssize_t ade7854_write_32bit(struct device *dev,
157 struct device_attribute *attr,
158 const char *buf,
159 size_t len)
160 {
161 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
162 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
163 struct ade7854_state *st = iio_priv(indio_dev);
164
165 int ret;
166 u32 val;
167
168 ret = kstrtou32(buf, 10, &val);
169 if (ret)
170 goto error_ret;
171 ret = st->write_reg_32(dev, this_attr->address, val);
172
173 error_ret:
174 return ret ? ret : len;
175 }
176
ade7854_reset(struct device * dev)177 static int ade7854_reset(struct device *dev)
178 {
179 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
180 struct ade7854_state *st = iio_priv(indio_dev);
181 u16 val;
182
183 st->read_reg_16(dev, ADE7854_CONFIG, &val);
184 val |= BIT(7); /* Software Chip Reset */
185
186 return st->write_reg_16(dev, ADE7854_CONFIG, val);
187 }
188
189 static IIO_DEV_ATTR_AIGAIN(S_IWUSR | S_IRUGO,
190 ade7854_read_24bit,
191 ade7854_write_24bit,
192 ADE7854_AIGAIN);
193 static IIO_DEV_ATTR_BIGAIN(S_IWUSR | S_IRUGO,
194 ade7854_read_24bit,
195 ade7854_write_24bit,
196 ADE7854_BIGAIN);
197 static IIO_DEV_ATTR_CIGAIN(S_IWUSR | S_IRUGO,
198 ade7854_read_24bit,
199 ade7854_write_24bit,
200 ADE7854_CIGAIN);
201 static IIO_DEV_ATTR_NIGAIN(S_IWUSR | S_IRUGO,
202 ade7854_read_24bit,
203 ade7854_write_24bit,
204 ADE7854_NIGAIN);
205 static IIO_DEV_ATTR_AVGAIN(S_IWUSR | S_IRUGO,
206 ade7854_read_24bit,
207 ade7854_write_24bit,
208 ADE7854_AVGAIN);
209 static IIO_DEV_ATTR_BVGAIN(S_IWUSR | S_IRUGO,
210 ade7854_read_24bit,
211 ade7854_write_24bit,
212 ADE7854_BVGAIN);
213 static IIO_DEV_ATTR_CVGAIN(S_IWUSR | S_IRUGO,
214 ade7854_read_24bit,
215 ade7854_write_24bit,
216 ADE7854_CVGAIN);
217 static IIO_DEV_ATTR_APPARENT_POWER_A_GAIN(S_IWUSR | S_IRUGO,
218 ade7854_read_24bit,
219 ade7854_write_24bit,
220 ADE7854_AVAGAIN);
221 static IIO_DEV_ATTR_APPARENT_POWER_B_GAIN(S_IWUSR | S_IRUGO,
222 ade7854_read_24bit,
223 ade7854_write_24bit,
224 ADE7854_BVAGAIN);
225 static IIO_DEV_ATTR_APPARENT_POWER_C_GAIN(S_IWUSR | S_IRUGO,
226 ade7854_read_24bit,
227 ade7854_write_24bit,
228 ADE7854_CVAGAIN);
229 static IIO_DEV_ATTR_ACTIVE_POWER_A_OFFSET(S_IWUSR | S_IRUGO,
230 ade7854_read_24bit,
231 ade7854_write_24bit,
232 ADE7854_AWATTOS);
233 static IIO_DEV_ATTR_ACTIVE_POWER_B_OFFSET(S_IWUSR | S_IRUGO,
234 ade7854_read_24bit,
235 ade7854_write_24bit,
236 ADE7854_BWATTOS);
237 static IIO_DEV_ATTR_ACTIVE_POWER_C_OFFSET(S_IWUSR | S_IRUGO,
238 ade7854_read_24bit,
239 ade7854_write_24bit,
240 ADE7854_CWATTOS);
241 static IIO_DEV_ATTR_REACTIVE_POWER_A_GAIN(S_IWUSR | S_IRUGO,
242 ade7854_read_24bit,
243 ade7854_write_24bit,
244 ADE7854_AVARGAIN);
245 static IIO_DEV_ATTR_REACTIVE_POWER_B_GAIN(S_IWUSR | S_IRUGO,
246 ade7854_read_24bit,
247 ade7854_write_24bit,
248 ADE7854_BVARGAIN);
249 static IIO_DEV_ATTR_REACTIVE_POWER_C_GAIN(S_IWUSR | S_IRUGO,
250 ade7854_read_24bit,
251 ade7854_write_24bit,
252 ADE7854_CVARGAIN);
253 static IIO_DEV_ATTR_REACTIVE_POWER_A_OFFSET(S_IWUSR | S_IRUGO,
254 ade7854_read_24bit,
255 ade7854_write_24bit,
256 ADE7854_AVAROS);
257 static IIO_DEV_ATTR_REACTIVE_POWER_B_OFFSET(S_IWUSR | S_IRUGO,
258 ade7854_read_24bit,
259 ade7854_write_24bit,
260 ADE7854_BVAROS);
261 static IIO_DEV_ATTR_REACTIVE_POWER_C_OFFSET(S_IWUSR | S_IRUGO,
262 ade7854_read_24bit,
263 ade7854_write_24bit,
264 ADE7854_CVAROS);
265 static IIO_DEV_ATTR_VPEAK(S_IWUSR | S_IRUGO,
266 ade7854_read_32bit,
267 ade7854_write_32bit,
268 ADE7854_VPEAK);
269 static IIO_DEV_ATTR_IPEAK(S_IWUSR | S_IRUGO,
270 ade7854_read_32bit,
271 ade7854_write_32bit,
272 ADE7854_VPEAK);
273 static IIO_DEV_ATTR_APHCAL(S_IWUSR | S_IRUGO,
274 ade7854_read_16bit,
275 ade7854_write_16bit,
276 ADE7854_APHCAL);
277 static IIO_DEV_ATTR_BPHCAL(S_IWUSR | S_IRUGO,
278 ade7854_read_16bit,
279 ade7854_write_16bit,
280 ADE7854_BPHCAL);
281 static IIO_DEV_ATTR_CPHCAL(S_IWUSR | S_IRUGO,
282 ade7854_read_16bit,
283 ade7854_write_16bit,
284 ADE7854_CPHCAL);
285 static IIO_DEV_ATTR_CF1DEN(S_IWUSR | S_IRUGO,
286 ade7854_read_16bit,
287 ade7854_write_16bit,
288 ADE7854_CF1DEN);
289 static IIO_DEV_ATTR_CF2DEN(S_IWUSR | S_IRUGO,
290 ade7854_read_16bit,
291 ade7854_write_16bit,
292 ADE7854_CF2DEN);
293 static IIO_DEV_ATTR_CF3DEN(S_IWUSR | S_IRUGO,
294 ade7854_read_16bit,
295 ade7854_write_16bit,
296 ADE7854_CF3DEN);
297 static IIO_DEV_ATTR_LINECYC(S_IWUSR | S_IRUGO,
298 ade7854_read_16bit,
299 ade7854_write_16bit,
300 ADE7854_LINECYC);
301 static IIO_DEV_ATTR_SAGCYC(S_IWUSR | S_IRUGO,
302 ade7854_read_8bit,
303 ade7854_write_8bit,
304 ADE7854_SAGCYC);
305 static IIO_DEV_ATTR_CFCYC(S_IWUSR | S_IRUGO,
306 ade7854_read_8bit,
307 ade7854_write_8bit,
308 ADE7854_CFCYC);
309 static IIO_DEV_ATTR_PEAKCYC(S_IWUSR | S_IRUGO,
310 ade7854_read_8bit,
311 ade7854_write_8bit,
312 ADE7854_PEAKCYC);
313 static IIO_DEV_ATTR_CHKSUM(ade7854_read_24bit,
314 ADE7854_CHECKSUM);
315 static IIO_DEV_ATTR_ANGLE0(ade7854_read_24bit,
316 ADE7854_ANGLE0);
317 static IIO_DEV_ATTR_ANGLE1(ade7854_read_24bit,
318 ADE7854_ANGLE1);
319 static IIO_DEV_ATTR_ANGLE2(ade7854_read_24bit,
320 ADE7854_ANGLE2);
321 static IIO_DEV_ATTR_AIRMS(S_IRUGO,
322 ade7854_read_24bit,
323 NULL,
324 ADE7854_AIRMS);
325 static IIO_DEV_ATTR_BIRMS(S_IRUGO,
326 ade7854_read_24bit,
327 NULL,
328 ADE7854_BIRMS);
329 static IIO_DEV_ATTR_CIRMS(S_IRUGO,
330 ade7854_read_24bit,
331 NULL,
332 ADE7854_CIRMS);
333 static IIO_DEV_ATTR_NIRMS(S_IRUGO,
334 ade7854_read_24bit,
335 NULL,
336 ADE7854_NIRMS);
337 static IIO_DEV_ATTR_AVRMS(S_IRUGO,
338 ade7854_read_24bit,
339 NULL,
340 ADE7854_AVRMS);
341 static IIO_DEV_ATTR_BVRMS(S_IRUGO,
342 ade7854_read_24bit,
343 NULL,
344 ADE7854_BVRMS);
345 static IIO_DEV_ATTR_CVRMS(S_IRUGO,
346 ade7854_read_24bit,
347 NULL,
348 ADE7854_CVRMS);
349 static IIO_DEV_ATTR_AIRMSOS(S_IRUGO,
350 ade7854_read_16bit,
351 ade7854_write_16bit,
352 ADE7854_AIRMSOS);
353 static IIO_DEV_ATTR_BIRMSOS(S_IRUGO,
354 ade7854_read_16bit,
355 ade7854_write_16bit,
356 ADE7854_BIRMSOS);
357 static IIO_DEV_ATTR_CIRMSOS(S_IRUGO,
358 ade7854_read_16bit,
359 ade7854_write_16bit,
360 ADE7854_CIRMSOS);
361 static IIO_DEV_ATTR_AVRMSOS(S_IRUGO,
362 ade7854_read_16bit,
363 ade7854_write_16bit,
364 ADE7854_AVRMSOS);
365 static IIO_DEV_ATTR_BVRMSOS(S_IRUGO,
366 ade7854_read_16bit,
367 ade7854_write_16bit,
368 ADE7854_BVRMSOS);
369 static IIO_DEV_ATTR_CVRMSOS(S_IRUGO,
370 ade7854_read_16bit,
371 ade7854_write_16bit,
372 ADE7854_CVRMSOS);
373 static IIO_DEV_ATTR_VOLT_A(ade7854_read_24bit,
374 ADE7854_VAWV);
375 static IIO_DEV_ATTR_VOLT_B(ade7854_read_24bit,
376 ADE7854_VBWV);
377 static IIO_DEV_ATTR_VOLT_C(ade7854_read_24bit,
378 ADE7854_VCWV);
379 static IIO_DEV_ATTR_CURRENT_A(ade7854_read_24bit,
380 ADE7854_IAWV);
381 static IIO_DEV_ATTR_CURRENT_B(ade7854_read_24bit,
382 ADE7854_IBWV);
383 static IIO_DEV_ATTR_CURRENT_C(ade7854_read_24bit,
384 ADE7854_ICWV);
385 static IIO_DEV_ATTR_AWATTHR(ade7854_read_32bit,
386 ADE7854_AWATTHR);
387 static IIO_DEV_ATTR_BWATTHR(ade7854_read_32bit,
388 ADE7854_BWATTHR);
389 static IIO_DEV_ATTR_CWATTHR(ade7854_read_32bit,
390 ADE7854_CWATTHR);
391 static IIO_DEV_ATTR_AFWATTHR(ade7854_read_32bit,
392 ADE7854_AFWATTHR);
393 static IIO_DEV_ATTR_BFWATTHR(ade7854_read_32bit,
394 ADE7854_BFWATTHR);
395 static IIO_DEV_ATTR_CFWATTHR(ade7854_read_32bit,
396 ADE7854_CFWATTHR);
397 static IIO_DEV_ATTR_AVARHR(ade7854_read_32bit,
398 ADE7854_AVARHR);
399 static IIO_DEV_ATTR_BVARHR(ade7854_read_32bit,
400 ADE7854_BVARHR);
401 static IIO_DEV_ATTR_CVARHR(ade7854_read_32bit,
402 ADE7854_CVARHR);
403 static IIO_DEV_ATTR_AVAHR(ade7854_read_32bit,
404 ADE7854_AVAHR);
405 static IIO_DEV_ATTR_BVAHR(ade7854_read_32bit,
406 ADE7854_BVAHR);
407 static IIO_DEV_ATTR_CVAHR(ade7854_read_32bit,
408 ADE7854_CVAHR);
409
ade7854_set_irq(struct device * dev,bool enable)410 static int ade7854_set_irq(struct device *dev, bool enable)
411 {
412 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
413 struct ade7854_state *st = iio_priv(indio_dev);
414
415 int ret;
416 u32 irqen;
417
418 ret = st->read_reg_32(dev, ADE7854_MASK0, &irqen);
419 if (ret)
420 goto error_ret;
421
422 if (enable)
423 irqen |= BIT(17); /* 1: interrupt enabled when all periodical
424 (at 8 kHz rate) DSP computations finish. */
425 else
426 irqen &= ~BIT(17);
427
428 ret = st->write_reg_32(dev, ADE7854_MASK0, irqen);
429 if (ret)
430 goto error_ret;
431
432 error_ret:
433 return ret;
434 }
435
ade7854_initial_setup(struct iio_dev * indio_dev)436 static int ade7854_initial_setup(struct iio_dev *indio_dev)
437 {
438 int ret;
439 struct device *dev = &indio_dev->dev;
440
441 /* Disable IRQ */
442 ret = ade7854_set_irq(dev, false);
443 if (ret) {
444 dev_err(dev, "disable irq failed");
445 goto err_ret;
446 }
447
448 ade7854_reset(dev);
449 msleep(ADE7854_STARTUP_DELAY);
450
451 err_ret:
452 return ret;
453 }
454
455 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("8000");
456
457 static IIO_CONST_ATTR(name, "ade7854");
458
459 static struct attribute *ade7854_attributes[] = {
460 &iio_dev_attr_aigain.dev_attr.attr,
461 &iio_dev_attr_bigain.dev_attr.attr,
462 &iio_dev_attr_cigain.dev_attr.attr,
463 &iio_dev_attr_nigain.dev_attr.attr,
464 &iio_dev_attr_avgain.dev_attr.attr,
465 &iio_dev_attr_bvgain.dev_attr.attr,
466 &iio_dev_attr_cvgain.dev_attr.attr,
467 &iio_dev_attr_linecyc.dev_attr.attr,
468 &iio_dev_attr_sagcyc.dev_attr.attr,
469 &iio_dev_attr_cfcyc.dev_attr.attr,
470 &iio_dev_attr_peakcyc.dev_attr.attr,
471 &iio_dev_attr_chksum.dev_attr.attr,
472 &iio_dev_attr_apparent_power_a_gain.dev_attr.attr,
473 &iio_dev_attr_apparent_power_b_gain.dev_attr.attr,
474 &iio_dev_attr_apparent_power_c_gain.dev_attr.attr,
475 &iio_dev_attr_active_power_a_offset.dev_attr.attr,
476 &iio_dev_attr_active_power_b_offset.dev_attr.attr,
477 &iio_dev_attr_active_power_c_offset.dev_attr.attr,
478 &iio_dev_attr_reactive_power_a_gain.dev_attr.attr,
479 &iio_dev_attr_reactive_power_b_gain.dev_attr.attr,
480 &iio_dev_attr_reactive_power_c_gain.dev_attr.attr,
481 &iio_dev_attr_reactive_power_a_offset.dev_attr.attr,
482 &iio_dev_attr_reactive_power_b_offset.dev_attr.attr,
483 &iio_dev_attr_reactive_power_c_offset.dev_attr.attr,
484 &iio_dev_attr_awatthr.dev_attr.attr,
485 &iio_dev_attr_bwatthr.dev_attr.attr,
486 &iio_dev_attr_cwatthr.dev_attr.attr,
487 &iio_dev_attr_afwatthr.dev_attr.attr,
488 &iio_dev_attr_bfwatthr.dev_attr.attr,
489 &iio_dev_attr_cfwatthr.dev_attr.attr,
490 &iio_dev_attr_avarhr.dev_attr.attr,
491 &iio_dev_attr_bvarhr.dev_attr.attr,
492 &iio_dev_attr_cvarhr.dev_attr.attr,
493 &iio_dev_attr_angle0.dev_attr.attr,
494 &iio_dev_attr_angle1.dev_attr.attr,
495 &iio_dev_attr_angle2.dev_attr.attr,
496 &iio_dev_attr_avahr.dev_attr.attr,
497 &iio_dev_attr_bvahr.dev_attr.attr,
498 &iio_dev_attr_cvahr.dev_attr.attr,
499 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
500 &iio_const_attr_name.dev_attr.attr,
501 &iio_dev_attr_vpeak.dev_attr.attr,
502 &iio_dev_attr_ipeak.dev_attr.attr,
503 &iio_dev_attr_aphcal.dev_attr.attr,
504 &iio_dev_attr_bphcal.dev_attr.attr,
505 &iio_dev_attr_cphcal.dev_attr.attr,
506 &iio_dev_attr_cf1den.dev_attr.attr,
507 &iio_dev_attr_cf2den.dev_attr.attr,
508 &iio_dev_attr_cf3den.dev_attr.attr,
509 &iio_dev_attr_airms.dev_attr.attr,
510 &iio_dev_attr_birms.dev_attr.attr,
511 &iio_dev_attr_cirms.dev_attr.attr,
512 &iio_dev_attr_nirms.dev_attr.attr,
513 &iio_dev_attr_avrms.dev_attr.attr,
514 &iio_dev_attr_bvrms.dev_attr.attr,
515 &iio_dev_attr_cvrms.dev_attr.attr,
516 &iio_dev_attr_airmsos.dev_attr.attr,
517 &iio_dev_attr_birmsos.dev_attr.attr,
518 &iio_dev_attr_cirmsos.dev_attr.attr,
519 &iio_dev_attr_avrmsos.dev_attr.attr,
520 &iio_dev_attr_bvrmsos.dev_attr.attr,
521 &iio_dev_attr_cvrmsos.dev_attr.attr,
522 &iio_dev_attr_volt_a.dev_attr.attr,
523 &iio_dev_attr_volt_b.dev_attr.attr,
524 &iio_dev_attr_volt_c.dev_attr.attr,
525 &iio_dev_attr_current_a.dev_attr.attr,
526 &iio_dev_attr_current_b.dev_attr.attr,
527 &iio_dev_attr_current_c.dev_attr.attr,
528 NULL,
529 };
530
531 static const struct attribute_group ade7854_attribute_group = {
532 .attrs = ade7854_attributes,
533 };
534
535 static const struct iio_info ade7854_info = {
536 .attrs = &ade7854_attribute_group,
537 .driver_module = THIS_MODULE,
538 };
539
ade7854_probe(struct iio_dev * indio_dev,struct device * dev)540 int ade7854_probe(struct iio_dev *indio_dev, struct device *dev)
541 {
542 int ret;
543 struct ade7854_state *st = iio_priv(indio_dev);
544 /* setup the industrialio driver allocated elements */
545 mutex_init(&st->buf_lock);
546
547 indio_dev->dev.parent = dev;
548 indio_dev->info = &ade7854_info;
549 indio_dev->modes = INDIO_DIRECT_MODE;
550
551 ret = iio_device_register(indio_dev);
552 if (ret)
553 return ret;
554
555 /* Get the device into a sane initial state */
556 ret = ade7854_initial_setup(indio_dev);
557 if (ret)
558 goto error_unreg_dev;
559
560 return 0;
561
562 error_unreg_dev:
563 iio_device_unregister(indio_dev);
564 return ret;
565 }
566 EXPORT_SYMBOL(ade7854_probe);
567
ade7854_remove(struct iio_dev * indio_dev)568 int ade7854_remove(struct iio_dev *indio_dev)
569 {
570 iio_device_unregister(indio_dev);
571
572 return 0;
573 }
574 EXPORT_SYMBOL(ade7854_remove);
575
576 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
577 MODULE_DESCRIPTION("Analog Devices ADE7854/58/68/78 Polyphase Energy Meter");
578 MODULE_LICENSE("GPL v2");
579