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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
86b89d73 | 2 | /* |
6700ce03 GR |
3 | * Driver for Linear Technology LTC2945 I2C Power Monitor |
4 | * | |
5 | * Copyright (c) 2014 Guenter Roeck | |
6700ce03 GR |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/err.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/i2c.h> | |
13 | #include <linux/hwmon.h> | |
14 | #include <linux/hwmon-sysfs.h> | |
15 | #include <linux/jiffies.h> | |
16 | #include <linux/regmap.h> | |
17 | ||
18 | /* chip registers */ | |
19 | #define LTC2945_CONTROL 0x00 | |
20 | #define LTC2945_ALERT 0x01 | |
21 | #define LTC2945_STATUS 0x02 | |
22 | #define LTC2945_FAULT 0x03 | |
23 | #define LTC2945_POWER_H 0x05 | |
24 | #define LTC2945_MAX_POWER_H 0x08 | |
25 | #define LTC2945_MIN_POWER_H 0x0b | |
26 | #define LTC2945_MAX_POWER_THRES_H 0x0e | |
27 | #define LTC2945_MIN_POWER_THRES_H 0x11 | |
28 | #define LTC2945_SENSE_H 0x14 | |
29 | #define LTC2945_MAX_SENSE_H 0x16 | |
30 | #define LTC2945_MIN_SENSE_H 0x18 | |
31 | #define LTC2945_MAX_SENSE_THRES_H 0x1a | |
32 | #define LTC2945_MIN_SENSE_THRES_H 0x1c | |
33 | #define LTC2945_VIN_H 0x1e | |
34 | #define LTC2945_MAX_VIN_H 0x20 | |
35 | #define LTC2945_MIN_VIN_H 0x22 | |
36 | #define LTC2945_MAX_VIN_THRES_H 0x24 | |
37 | #define LTC2945_MIN_VIN_THRES_H 0x26 | |
38 | #define LTC2945_ADIN_H 0x28 | |
39 | #define LTC2945_MAX_ADIN_H 0x2a | |
40 | #define LTC2945_MIN_ADIN_H 0x2c | |
41 | #define LTC2945_MAX_ADIN_THRES_H 0x2e | |
42 | #define LTC2945_MIN_ADIN_THRES_H 0x30 | |
43 | #define LTC2945_MIN_ADIN_THRES_L 0x31 | |
44 | ||
45 | /* Fault register bits */ | |
46 | ||
47 | #define FAULT_ADIN_UV (1 << 0) | |
48 | #define FAULT_ADIN_OV (1 << 1) | |
49 | #define FAULT_VIN_UV (1 << 2) | |
50 | #define FAULT_VIN_OV (1 << 3) | |
51 | #define FAULT_SENSE_UV (1 << 4) | |
52 | #define FAULT_SENSE_OV (1 << 5) | |
53 | #define FAULT_POWER_UV (1 << 6) | |
54 | #define FAULT_POWER_OV (1 << 7) | |
55 | ||
56 | /* Control register bits */ | |
57 | ||
58 | #define CONTROL_MULT_SELECT (1 << 0) | |
59 | #define CONTROL_TEST_MODE (1 << 4) | |
60 | ||
61 | static inline bool is_power_reg(u8 reg) | |
62 | { | |
63 | return reg < LTC2945_SENSE_H; | |
64 | } | |
65 | ||
66 | /* Return the value from the given register in uW, mV, or mA */ | |
67 | static long long ltc2945_reg_to_val(struct device *dev, u8 reg) | |
68 | { | |
69 | struct regmap *regmap = dev_get_drvdata(dev); | |
70 | unsigned int control; | |
71 | u8 buf[3]; | |
72 | long long val; | |
73 | int ret; | |
74 | ||
75 | ret = regmap_bulk_read(regmap, reg, buf, | |
76 | is_power_reg(reg) ? 3 : 2); | |
77 | if (ret < 0) | |
78 | return ret; | |
79 | ||
80 | if (is_power_reg(reg)) { | |
81 | /* power */ | |
82 | val = (buf[0] << 16) + (buf[1] << 8) + buf[2]; | |
83 | } else { | |
84 | /* current, voltage */ | |
85 | val = (buf[0] << 4) + (buf[1] >> 4); | |
86 | } | |
87 | ||
88 | switch (reg) { | |
89 | case LTC2945_POWER_H: | |
90 | case LTC2945_MAX_POWER_H: | |
91 | case LTC2945_MIN_POWER_H: | |
92 | case LTC2945_MAX_POWER_THRES_H: | |
93 | case LTC2945_MIN_POWER_THRES_H: | |
94 | /* | |
95 | * Convert to uW by assuming current is measured with | |
96 | * an 1mOhm sense resistor, similar to current | |
97 | * measurements. | |
98 | * Control register bit 0 selects if voltage at SENSE+/VDD | |
99 | * or voltage at ADIN is used to measure power. | |
100 | */ | |
101 | ret = regmap_read(regmap, LTC2945_CONTROL, &control); | |
102 | if (ret < 0) | |
103 | return ret; | |
104 | if (control & CONTROL_MULT_SELECT) { | |
105 | /* 25 mV * 25 uV = 0.625 uV resolution. */ | |
106 | val *= 625LL; | |
107 | } else { | |
108 | /* 0.5 mV * 25 uV = 0.0125 uV resolution. */ | |
109 | val = (val * 25LL) >> 1; | |
110 | } | |
111 | break; | |
112 | case LTC2945_VIN_H: | |
113 | case LTC2945_MAX_VIN_H: | |
114 | case LTC2945_MIN_VIN_H: | |
115 | case LTC2945_MAX_VIN_THRES_H: | |
116 | case LTC2945_MIN_VIN_THRES_H: | |
117 | /* 25 mV resolution. Convert to mV. */ | |
118 | val *= 25; | |
119 | break; | |
120 | case LTC2945_ADIN_H: | |
121 | case LTC2945_MAX_ADIN_H: | |
122 | case LTC2945_MIN_ADIN_THRES_H: | |
123 | case LTC2945_MAX_ADIN_THRES_H: | |
124 | case LTC2945_MIN_ADIN_H: | |
125 | /* 0.5mV resolution. Convert to mV. */ | |
126 | val = val >> 1; | |
127 | break; | |
128 | case LTC2945_SENSE_H: | |
129 | case LTC2945_MAX_SENSE_H: | |
130 | case LTC2945_MIN_SENSE_H: | |
131 | case LTC2945_MAX_SENSE_THRES_H: | |
132 | case LTC2945_MIN_SENSE_THRES_H: | |
133 | /* | |
134 | * 25 uV resolution. Convert to current as measured with | |
135 | * an 1 mOhm sense resistor, in mA. If a different sense | |
136 | * resistor is installed, calculate the actual current by | |
137 | * dividing the reported current by the sense resistor value | |
138 | * in mOhm. | |
139 | */ | |
140 | val *= 25; | |
141 | break; | |
142 | default: | |
143 | return -EINVAL; | |
144 | } | |
145 | return val; | |
146 | } | |
147 | ||
148 | static int ltc2945_val_to_reg(struct device *dev, u8 reg, | |
149 | unsigned long val) | |
150 | { | |
151 | struct regmap *regmap = dev_get_drvdata(dev); | |
152 | unsigned int control; | |
153 | int ret; | |
154 | ||
155 | switch (reg) { | |
156 | case LTC2945_POWER_H: | |
157 | case LTC2945_MAX_POWER_H: | |
158 | case LTC2945_MIN_POWER_H: | |
159 | case LTC2945_MAX_POWER_THRES_H: | |
160 | case LTC2945_MIN_POWER_THRES_H: | |
161 | /* | |
162 | * Convert to register value by assuming current is measured | |
163 | * with an 1mOhm sense resistor, similar to current | |
164 | * measurements. | |
165 | * Control register bit 0 selects if voltage at SENSE+/VDD | |
166 | * or voltage at ADIN is used to measure power, which in turn | |
167 | * determines register calculations. | |
168 | */ | |
169 | ret = regmap_read(regmap, LTC2945_CONTROL, &control); | |
170 | if (ret < 0) | |
171 | return ret; | |
172 | if (control & CONTROL_MULT_SELECT) { | |
173 | /* 25 mV * 25 uV = 0.625 uV resolution. */ | |
174 | val = DIV_ROUND_CLOSEST(val, 625); | |
175 | } else { | |
176 | /* | |
177 | * 0.5 mV * 25 uV = 0.0125 uV resolution. | |
178 | * Divide first to avoid overflow; | |
179 | * accept loss of accuracy. | |
180 | */ | |
181 | val = DIV_ROUND_CLOSEST(val, 25) * 2; | |
182 | } | |
183 | break; | |
184 | case LTC2945_VIN_H: | |
185 | case LTC2945_MAX_VIN_H: | |
186 | case LTC2945_MIN_VIN_H: | |
187 | case LTC2945_MAX_VIN_THRES_H: | |
188 | case LTC2945_MIN_VIN_THRES_H: | |
189 | /* 25 mV resolution. */ | |
190 | val /= 25; | |
191 | break; | |
192 | case LTC2945_ADIN_H: | |
193 | case LTC2945_MAX_ADIN_H: | |
194 | case LTC2945_MIN_ADIN_THRES_H: | |
195 | case LTC2945_MAX_ADIN_THRES_H: | |
196 | case LTC2945_MIN_ADIN_H: | |
197 | /* 0.5mV resolution. */ | |
198 | val *= 2; | |
199 | break; | |
200 | case LTC2945_SENSE_H: | |
201 | case LTC2945_MAX_SENSE_H: | |
202 | case LTC2945_MIN_SENSE_H: | |
203 | case LTC2945_MAX_SENSE_THRES_H: | |
204 | case LTC2945_MIN_SENSE_THRES_H: | |
205 | /* | |
206 | * 25 uV resolution. Convert to current as measured with | |
207 | * an 1 mOhm sense resistor, in mA. If a different sense | |
208 | * resistor is installed, calculate the actual current by | |
209 | * dividing the reported current by the sense resistor value | |
210 | * in mOhm. | |
211 | */ | |
212 | val = DIV_ROUND_CLOSEST(val, 25); | |
213 | break; | |
214 | default: | |
215 | return -EINVAL; | |
216 | } | |
217 | return val; | |
218 | } | |
219 | ||
5614e26d | 220 | static ssize_t ltc2945_value_show(struct device *dev, |
6700ce03 GR |
221 | struct device_attribute *da, char *buf) |
222 | { | |
223 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
224 | long long value; | |
225 | ||
226 | value = ltc2945_reg_to_val(dev, attr->index); | |
227 | if (value < 0) | |
228 | return value; | |
229 | return snprintf(buf, PAGE_SIZE, "%lld\n", value); | |
230 | } | |
231 | ||
5614e26d GR |
232 | static ssize_t ltc2945_value_store(struct device *dev, |
233 | struct device_attribute *da, | |
234 | const char *buf, size_t count) | |
6700ce03 GR |
235 | { |
236 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
237 | struct regmap *regmap = dev_get_drvdata(dev); | |
238 | u8 reg = attr->index; | |
239 | unsigned long val; | |
240 | u8 regbuf[3]; | |
241 | int num_regs; | |
242 | int regval; | |
243 | int ret; | |
244 | ||
245 | ret = kstrtoul(buf, 10, &val); | |
246 | if (ret) | |
247 | return ret; | |
248 | ||
249 | /* convert to register value, then clamp and write result */ | |
250 | regval = ltc2945_val_to_reg(dev, reg, val); | |
251 | if (is_power_reg(reg)) { | |
252 | regval = clamp_val(regval, 0, 0xffffff); | |
253 | regbuf[0] = regval >> 16; | |
254 | regbuf[1] = (regval >> 8) & 0xff; | |
255 | regbuf[2] = regval; | |
256 | num_regs = 3; | |
257 | } else { | |
258 | regval = clamp_val(regval, 0, 0xfff) << 4; | |
259 | regbuf[0] = regval >> 8; | |
260 | regbuf[1] = regval & 0xff; | |
261 | num_regs = 2; | |
262 | } | |
263 | ret = regmap_bulk_write(regmap, reg, regbuf, num_regs); | |
264 | return ret < 0 ? ret : count; | |
265 | } | |
266 | ||
5614e26d | 267 | static ssize_t ltc2945_history_store(struct device *dev, |
6700ce03 GR |
268 | struct device_attribute *da, |
269 | const char *buf, size_t count) | |
270 | { | |
271 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
272 | struct regmap *regmap = dev_get_drvdata(dev); | |
273 | u8 reg = attr->index; | |
274 | int num_regs = is_power_reg(reg) ? 3 : 2; | |
275 | u8 buf_min[3] = { 0xff, 0xff, 0xff }; | |
276 | u8 buf_max[3] = { 0, 0, 0 }; | |
277 | unsigned long val; | |
278 | int ret; | |
279 | ||
280 | ret = kstrtoul(buf, 10, &val); | |
281 | if (ret) | |
282 | return ret; | |
283 | if (val != 1) | |
284 | return -EINVAL; | |
285 | ||
286 | ret = regmap_update_bits(regmap, LTC2945_CONTROL, CONTROL_TEST_MODE, | |
287 | CONTROL_TEST_MODE); | |
288 | ||
289 | /* Reset minimum */ | |
290 | ret = regmap_bulk_write(regmap, reg, buf_min, num_regs); | |
291 | if (ret) | |
292 | return ret; | |
293 | ||
294 | switch (reg) { | |
295 | case LTC2945_MIN_POWER_H: | |
296 | reg = LTC2945_MAX_POWER_H; | |
297 | break; | |
298 | case LTC2945_MIN_SENSE_H: | |
299 | reg = LTC2945_MAX_SENSE_H; | |
300 | break; | |
301 | case LTC2945_MIN_VIN_H: | |
302 | reg = LTC2945_MAX_VIN_H; | |
303 | break; | |
304 | case LTC2945_MIN_ADIN_H: | |
305 | reg = LTC2945_MAX_ADIN_H; | |
306 | break; | |
307 | default: | |
f75d7230 GR |
308 | WARN_ONCE(1, "Bad register: 0x%x\n", reg); |
309 | return -EINVAL; | |
6700ce03 GR |
310 | } |
311 | /* Reset maximum */ | |
312 | ret = regmap_bulk_write(regmap, reg, buf_max, num_regs); | |
313 | ||
314 | /* Try resetting test mode even if there was an error */ | |
315 | regmap_update_bits(regmap, LTC2945_CONTROL, CONTROL_TEST_MODE, 0); | |
316 | ||
317 | return ret ? : count; | |
318 | } | |
319 | ||
5614e26d | 320 | static ssize_t ltc2945_bool_show(struct device *dev, |
6700ce03 GR |
321 | struct device_attribute *da, char *buf) |
322 | { | |
323 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
324 | struct regmap *regmap = dev_get_drvdata(dev); | |
325 | unsigned int fault; | |
326 | int ret; | |
327 | ||
328 | ret = regmap_read(regmap, LTC2945_FAULT, &fault); | |
329 | if (ret < 0) | |
330 | return ret; | |
331 | ||
332 | fault &= attr->index; | |
333 | if (fault) /* Clear reported faults in chip register */ | |
334 | regmap_update_bits(regmap, LTC2945_FAULT, attr->index, 0); | |
335 | ||
336 | return snprintf(buf, PAGE_SIZE, "%d\n", !!fault); | |
337 | } | |
338 | ||
339 | /* Input voltages */ | |
340 | ||
5614e26d GR |
341 | static SENSOR_DEVICE_ATTR_RO(in1_input, ltc2945_value, LTC2945_VIN_H); |
342 | static SENSOR_DEVICE_ATTR_RW(in1_min, ltc2945_value, LTC2945_MIN_VIN_THRES_H); | |
343 | static SENSOR_DEVICE_ATTR_RW(in1_max, ltc2945_value, LTC2945_MAX_VIN_THRES_H); | |
344 | static SENSOR_DEVICE_ATTR_RO(in1_lowest, ltc2945_value, LTC2945_MIN_VIN_H); | |
345 | static SENSOR_DEVICE_ATTR_RO(in1_highest, ltc2945_value, LTC2945_MAX_VIN_H); | |
346 | static SENSOR_DEVICE_ATTR_WO(in1_reset_history, ltc2945_history, | |
347 | LTC2945_MIN_VIN_H); | |
348 | ||
349 | static SENSOR_DEVICE_ATTR_RO(in2_input, ltc2945_value, LTC2945_ADIN_H); | |
350 | static SENSOR_DEVICE_ATTR_RW(in2_min, ltc2945_value, LTC2945_MIN_ADIN_THRES_H); | |
351 | static SENSOR_DEVICE_ATTR_RW(in2_max, ltc2945_value, LTC2945_MAX_ADIN_THRES_H); | |
352 | static SENSOR_DEVICE_ATTR_RO(in2_lowest, ltc2945_value, LTC2945_MIN_ADIN_H); | |
353 | static SENSOR_DEVICE_ATTR_RO(in2_highest, ltc2945_value, LTC2945_MAX_ADIN_H); | |
354 | static SENSOR_DEVICE_ATTR_WO(in2_reset_history, ltc2945_history, | |
355 | LTC2945_MIN_ADIN_H); | |
6700ce03 GR |
356 | |
357 | /* Voltage alarms */ | |
358 | ||
5614e26d GR |
359 | static SENSOR_DEVICE_ATTR_RO(in1_min_alarm, ltc2945_bool, FAULT_VIN_UV); |
360 | static SENSOR_DEVICE_ATTR_RO(in1_max_alarm, ltc2945_bool, FAULT_VIN_OV); | |
361 | static SENSOR_DEVICE_ATTR_RO(in2_min_alarm, ltc2945_bool, FAULT_ADIN_UV); | |
362 | static SENSOR_DEVICE_ATTR_RO(in2_max_alarm, ltc2945_bool, FAULT_ADIN_OV); | |
6700ce03 GR |
363 | |
364 | /* Currents (via sense resistor) */ | |
365 | ||
5614e26d GR |
366 | static SENSOR_DEVICE_ATTR_RO(curr1_input, ltc2945_value, LTC2945_SENSE_H); |
367 | static SENSOR_DEVICE_ATTR_RW(curr1_min, ltc2945_value, | |
368 | LTC2945_MIN_SENSE_THRES_H); | |
369 | static SENSOR_DEVICE_ATTR_RW(curr1_max, ltc2945_value, | |
370 | LTC2945_MAX_SENSE_THRES_H); | |
371 | static SENSOR_DEVICE_ATTR_RO(curr1_lowest, ltc2945_value, LTC2945_MIN_SENSE_H); | |
372 | static SENSOR_DEVICE_ATTR_RO(curr1_highest, ltc2945_value, | |
373 | LTC2945_MAX_SENSE_H); | |
374 | static SENSOR_DEVICE_ATTR_WO(curr1_reset_history, ltc2945_history, | |
375 | LTC2945_MIN_SENSE_H); | |
6700ce03 GR |
376 | |
377 | /* Current alarms */ | |
378 | ||
5614e26d GR |
379 | static SENSOR_DEVICE_ATTR_RO(curr1_min_alarm, ltc2945_bool, FAULT_SENSE_UV); |
380 | static SENSOR_DEVICE_ATTR_RO(curr1_max_alarm, ltc2945_bool, FAULT_SENSE_OV); | |
6700ce03 GR |
381 | |
382 | /* Power */ | |
383 | ||
5614e26d GR |
384 | static SENSOR_DEVICE_ATTR_RO(power1_input, ltc2945_value, LTC2945_POWER_H); |
385 | static SENSOR_DEVICE_ATTR_RW(power1_min, ltc2945_value, | |
386 | LTC2945_MIN_POWER_THRES_H); | |
387 | static SENSOR_DEVICE_ATTR_RW(power1_max, ltc2945_value, | |
388 | LTC2945_MAX_POWER_THRES_H); | |
389 | static SENSOR_DEVICE_ATTR_RO(power1_input_lowest, ltc2945_value, | |
390 | LTC2945_MIN_POWER_H); | |
391 | static SENSOR_DEVICE_ATTR_RO(power1_input_highest, ltc2945_value, | |
392 | LTC2945_MAX_POWER_H); | |
393 | static SENSOR_DEVICE_ATTR_WO(power1_reset_history, ltc2945_history, | |
394 | LTC2945_MIN_POWER_H); | |
6700ce03 GR |
395 | |
396 | /* Power alarms */ | |
397 | ||
5614e26d GR |
398 | static SENSOR_DEVICE_ATTR_RO(power1_min_alarm, ltc2945_bool, FAULT_POWER_UV); |
399 | static SENSOR_DEVICE_ATTR_RO(power1_max_alarm, ltc2945_bool, FAULT_POWER_OV); | |
6700ce03 GR |
400 | |
401 | static struct attribute *ltc2945_attrs[] = { | |
402 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
403 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
404 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
405 | &sensor_dev_attr_in1_lowest.dev_attr.attr, | |
406 | &sensor_dev_attr_in1_highest.dev_attr.attr, | |
407 | &sensor_dev_attr_in1_reset_history.dev_attr.attr, | |
408 | &sensor_dev_attr_in1_min_alarm.dev_attr.attr, | |
409 | &sensor_dev_attr_in1_max_alarm.dev_attr.attr, | |
410 | ||
411 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
412 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
413 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
414 | &sensor_dev_attr_in2_lowest.dev_attr.attr, | |
415 | &sensor_dev_attr_in2_highest.dev_attr.attr, | |
416 | &sensor_dev_attr_in2_reset_history.dev_attr.attr, | |
417 | &sensor_dev_attr_in2_min_alarm.dev_attr.attr, | |
418 | &sensor_dev_attr_in2_max_alarm.dev_attr.attr, | |
419 | ||
420 | &sensor_dev_attr_curr1_input.dev_attr.attr, | |
421 | &sensor_dev_attr_curr1_min.dev_attr.attr, | |
422 | &sensor_dev_attr_curr1_max.dev_attr.attr, | |
423 | &sensor_dev_attr_curr1_lowest.dev_attr.attr, | |
424 | &sensor_dev_attr_curr1_highest.dev_attr.attr, | |
425 | &sensor_dev_attr_curr1_reset_history.dev_attr.attr, | |
426 | &sensor_dev_attr_curr1_min_alarm.dev_attr.attr, | |
427 | &sensor_dev_attr_curr1_max_alarm.dev_attr.attr, | |
428 | ||
429 | &sensor_dev_attr_power1_input.dev_attr.attr, | |
430 | &sensor_dev_attr_power1_min.dev_attr.attr, | |
431 | &sensor_dev_attr_power1_max.dev_attr.attr, | |
432 | &sensor_dev_attr_power1_input_lowest.dev_attr.attr, | |
433 | &sensor_dev_attr_power1_input_highest.dev_attr.attr, | |
434 | &sensor_dev_attr_power1_reset_history.dev_attr.attr, | |
435 | &sensor_dev_attr_power1_min_alarm.dev_attr.attr, | |
436 | &sensor_dev_attr_power1_max_alarm.dev_attr.attr, | |
437 | ||
438 | NULL, | |
439 | }; | |
440 | ATTRIBUTE_GROUPS(ltc2945); | |
441 | ||
034b44b4 | 442 | static const struct regmap_config ltc2945_regmap_config = { |
6700ce03 GR |
443 | .reg_bits = 8, |
444 | .val_bits = 8, | |
445 | .max_register = LTC2945_MIN_ADIN_THRES_L, | |
446 | }; | |
447 | ||
67487038 | 448 | static int ltc2945_probe(struct i2c_client *client) |
6700ce03 GR |
449 | { |
450 | struct device *dev = &client->dev; | |
451 | struct device *hwmon_dev; | |
452 | struct regmap *regmap; | |
453 | ||
454 | regmap = devm_regmap_init_i2c(client, <c2945_regmap_config); | |
455 | if (IS_ERR(regmap)) { | |
456 | dev_err(dev, "failed to allocate register map\n"); | |
457 | return PTR_ERR(regmap); | |
458 | } | |
459 | ||
460 | /* Clear faults */ | |
461 | regmap_write(regmap, LTC2945_FAULT, 0x00); | |
462 | ||
463 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, | |
464 | regmap, | |
465 | ltc2945_groups); | |
466 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
467 | } | |
468 | ||
469 | static const struct i2c_device_id ltc2945_id[] = { | |
470 | {"ltc2945", 0}, | |
471 | { } | |
472 | }; | |
473 | ||
474 | MODULE_DEVICE_TABLE(i2c, ltc2945_id); | |
475 | ||
476 | static struct i2c_driver ltc2945_driver = { | |
477 | .driver = { | |
478 | .name = "ltc2945", | |
479 | }, | |
67487038 | 480 | .probe_new = ltc2945_probe, |
6700ce03 GR |
481 | .id_table = ltc2945_id, |
482 | }; | |
483 | ||
484 | module_i2c_driver(ltc2945_driver); | |
485 | ||
486 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
487 | MODULE_DESCRIPTION("LTC2945 driver"); | |
488 | MODULE_LICENSE("GPL"); |