1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
4 * and Digital Power Monitor
5 *
6 * Copyright (c) 2011 Ericsson AB.
7 * Copyright (c) 2018 Guenter Roeck
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/slab.h>
15 #include <linux/i2c.h>
16 #include <linux/bitops.h>
17 #include <linux/bitfield.h>
18 #include <linux/log2.h>
19 #include "pmbus.h"
20
21 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1281, adm1293, adm1294 };
22
23 #define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
24 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
25 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
26
27 #define ADM1275_PEAK_IOUT 0xd0
28 #define ADM1275_PEAK_VIN 0xd1
29 #define ADM1275_PEAK_VOUT 0xd2
30 #define ADM1275_PMON_CONTROL 0xd3
31 #define ADM1275_PMON_CONFIG 0xd4
32
33 #define ADM1275_CONVERT_EN BIT(0)
34
35 #define ADM1275_VIN_VOUT_SELECT BIT(6)
36 #define ADM1275_VRANGE BIT(5)
37 #define ADM1075_IRANGE_50 BIT(4)
38 #define ADM1075_IRANGE_25 BIT(3)
39 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
40
41 #define ADM1272_IRANGE BIT(0)
42
43 #define ADM1278_TSFILT BIT(15)
44 #define ADM1278_TEMP1_EN BIT(3)
45 #define ADM1278_VIN_EN BIT(2)
46 #define ADM1278_VOUT_EN BIT(1)
47
48 #define ADM1278_PMON_DEFCONFIG (ADM1278_VOUT_EN | ADM1278_TEMP1_EN | ADM1278_TSFILT)
49
50 #define ADM1293_IRANGE_25 0
51 #define ADM1293_IRANGE_50 BIT(6)
52 #define ADM1293_IRANGE_100 BIT(7)
53 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
54 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
55
56 #define ADM1293_VIN_SEL_012 BIT(2)
57 #define ADM1293_VIN_SEL_074 BIT(3)
58 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
59 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
60
61 #define ADM1293_VAUX_EN BIT(1)
62
63 #define ADM1278_PEAK_TEMP 0xd7
64 #define ADM1275_IOUT_WARN2_LIMIT 0xd7
65 #define ADM1275_DEVICE_CONFIG 0xd8
66
67 #define ADM1275_IOUT_WARN2_SELECT BIT(4)
68
69 #define ADM1276_PEAK_PIN 0xda
70 #define ADM1075_READ_VAUX 0xdd
71 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde
72 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
73 #define ADM1293_IOUT_MIN 0xe3
74 #define ADM1293_PIN_MIN 0xe4
75 #define ADM1075_VAUX_STATUS 0xf6
76
77 #define ADM1075_VAUX_OV_WARN BIT(7)
78 #define ADM1075_VAUX_UV_WARN BIT(6)
79
80 #define ADM1275_VI_AVG_SHIFT 0
81 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
82 ADM1275_VI_AVG_SHIFT)
83 #define ADM1275_SAMPLES_AVG_MAX 128
84
85 #define ADM1278_PWR_AVG_SHIFT 11
86 #define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
87 ADM1278_PWR_AVG_SHIFT)
88 #define ADM1278_VI_AVG_SHIFT 8
89 #define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
90 ADM1278_VI_AVG_SHIFT)
91
92 struct adm1275_data {
93 int id;
94 bool have_oc_fault;
95 bool have_uc_fault;
96 bool have_vout;
97 bool have_vaux_status;
98 bool have_mfr_vaux_status;
99 bool have_iout_min;
100 bool have_pin_min;
101 bool have_pin_max;
102 bool have_temp_max;
103 bool have_power_sampling;
104 struct pmbus_driver_info info;
105 };
106
107 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
108
109 struct coefficients {
110 s16 m;
111 s16 b;
112 s16 R;
113 };
114
115 static const struct coefficients adm1075_coefficients[] = {
116 [0] = { 27169, 0, -1 }, /* voltage */
117 [1] = { 806, 20475, -1 }, /* current, irange25 */
118 [2] = { 404, 20475, -1 }, /* current, irange50 */
119 [3] = { 8549, 0, -1 }, /* power, irange25 */
120 [4] = { 4279, 0, -1 }, /* power, irange50 */
121 };
122
123 static const struct coefficients adm1272_coefficients[] = {
124 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
125 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
126 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
127 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
128 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
129 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
130 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
131 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
132 [8] = { 42, 31871, -1 }, /* temperature */
133
134 };
135
136 static const struct coefficients adm1275_coefficients[] = {
137 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
138 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
139 [2] = { 807, 20475, -1 }, /* current */
140 };
141
142 static const struct coefficients adm1276_coefficients[] = {
143 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
144 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
145 [2] = { 807, 20475, -1 }, /* current */
146 [3] = { 6043, 0, -2 }, /* power, vrange set */
147 [4] = { 2115, 0, -1 }, /* power, vrange not set */
148 };
149
150 static const struct coefficients adm1278_coefficients[] = {
151 [0] = { 19599, 0, -2 }, /* voltage */
152 [1] = { 800, 20475, -1 }, /* current */
153 [2] = { 6123, 0, -2 }, /* power */
154 [3] = { 42, 31880, -1 }, /* temperature */
155 };
156
157 static const struct coefficients adm1293_coefficients[] = {
158 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
159 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
160 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
161 [3] = { 8000, -100, -2 }, /* current, irange25 */
162 [4] = { 4000, -100, -2 }, /* current, irange50 */
163 [5] = { 20000, -1000, -3 }, /* current, irange100 */
164 [6] = { 10000, -1000, -3 }, /* current, irange200 */
165 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
166 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
167 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
168 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
169 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
170 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
171 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
172 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
173 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
174 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
175 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
176 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
177 };
178
adm1275_read_samples(const struct adm1275_data * data,struct i2c_client * client,bool is_power)179 static int adm1275_read_samples(const struct adm1275_data *data,
180 struct i2c_client *client, bool is_power)
181 {
182 int shift, ret;
183 u16 mask;
184
185 /*
186 * The PMON configuration register is a 16-bit register only on chips
187 * supporting power average sampling. On other chips it is an 8-bit
188 * register.
189 */
190 if (data->have_power_sampling) {
191 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
192 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
193 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
194 } else {
195 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
196 mask = ADM1275_VI_AVG_MASK;
197 shift = ADM1275_VI_AVG_SHIFT;
198 }
199 if (ret < 0)
200 return ret;
201
202 return (ret & mask) >> shift;
203 }
204
adm1275_write_pmon_config(const struct adm1275_data * data,struct i2c_client * client,u16 word)205 static int adm1275_write_pmon_config(const struct adm1275_data *data,
206 struct i2c_client *client, u16 word)
207 {
208 int ret, ret2;
209
210 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONTROL, 0);
211 if (ret)
212 return ret;
213
214 if (data->have_power_sampling)
215 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
216 word);
217 else
218 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
219 word);
220
221 /*
222 * We still want to re-enable conversions if writing into
223 * ADM1275_PMON_CONFIG failed.
224 */
225 ret2 = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONTROL,
226 ADM1275_CONVERT_EN);
227 if (!ret)
228 ret = ret2;
229
230 return ret;
231 }
232
adm1275_write_samples(const struct adm1275_data * data,struct i2c_client * client,bool is_power,u16 word)233 static int adm1275_write_samples(const struct adm1275_data *data,
234 struct i2c_client *client,
235 bool is_power, u16 word)
236 {
237 int shift, ret;
238 u16 mask;
239
240 if (data->have_power_sampling) {
241 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
242 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
243 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
244 } else {
245 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
246 mask = ADM1275_VI_AVG_MASK;
247 shift = ADM1275_VI_AVG_SHIFT;
248 }
249 if (ret < 0)
250 return ret;
251
252 word = (ret & ~mask) | ((word << shift) & mask);
253
254 return adm1275_write_pmon_config(data, client, word);
255 }
256
adm1275_read_word_data(struct i2c_client * client,int page,int phase,int reg)257 static int adm1275_read_word_data(struct i2c_client *client, int page,
258 int phase, int reg)
259 {
260 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
261 const struct adm1275_data *data = to_adm1275_data(info);
262 int ret = 0;
263
264 if (page > 0)
265 return -ENXIO;
266
267 switch (reg) {
268 case PMBUS_IOUT_UC_FAULT_LIMIT:
269 if (!data->have_uc_fault)
270 return -ENXIO;
271 ret = pmbus_read_word_data(client, 0, 0xff,
272 ADM1275_IOUT_WARN2_LIMIT);
273 break;
274 case PMBUS_IOUT_OC_FAULT_LIMIT:
275 if (!data->have_oc_fault)
276 return -ENXIO;
277 ret = pmbus_read_word_data(client, 0, 0xff,
278 ADM1275_IOUT_WARN2_LIMIT);
279 break;
280 case PMBUS_VOUT_OV_WARN_LIMIT:
281 if (data->have_vout)
282 return -ENODATA;
283 ret = pmbus_read_word_data(client, 0, 0xff,
284 ADM1075_VAUX_OV_WARN_LIMIT);
285 break;
286 case PMBUS_VOUT_UV_WARN_LIMIT:
287 if (data->have_vout)
288 return -ENODATA;
289 ret = pmbus_read_word_data(client, 0, 0xff,
290 ADM1075_VAUX_UV_WARN_LIMIT);
291 break;
292 case PMBUS_READ_VOUT:
293 if (data->have_vout)
294 return -ENODATA;
295 ret = pmbus_read_word_data(client, 0, 0xff,
296 ADM1075_READ_VAUX);
297 break;
298 case PMBUS_VIRT_READ_IOUT_MIN:
299 if (!data->have_iout_min)
300 return -ENXIO;
301 ret = pmbus_read_word_data(client, 0, 0xff,
302 ADM1293_IOUT_MIN);
303 break;
304 case PMBUS_VIRT_READ_IOUT_MAX:
305 ret = pmbus_read_word_data(client, 0, 0xff,
306 ADM1275_PEAK_IOUT);
307 break;
308 case PMBUS_VIRT_READ_VOUT_MAX:
309 ret = pmbus_read_word_data(client, 0, 0xff,
310 ADM1275_PEAK_VOUT);
311 break;
312 case PMBUS_VIRT_READ_VIN_MAX:
313 ret = pmbus_read_word_data(client, 0, 0xff,
314 ADM1275_PEAK_VIN);
315 break;
316 case PMBUS_VIRT_READ_PIN_MIN:
317 if (!data->have_pin_min)
318 return -ENXIO;
319 ret = pmbus_read_word_data(client, 0, 0xff,
320 ADM1293_PIN_MIN);
321 break;
322 case PMBUS_VIRT_READ_PIN_MAX:
323 if (!data->have_pin_max)
324 return -ENXIO;
325 ret = pmbus_read_word_data(client, 0, 0xff,
326 ADM1276_PEAK_PIN);
327 break;
328 case PMBUS_VIRT_READ_TEMP_MAX:
329 if (!data->have_temp_max)
330 return -ENXIO;
331 ret = pmbus_read_word_data(client, 0, 0xff,
332 ADM1278_PEAK_TEMP);
333 break;
334 case PMBUS_VIRT_RESET_IOUT_HISTORY:
335 case PMBUS_VIRT_RESET_VOUT_HISTORY:
336 case PMBUS_VIRT_RESET_VIN_HISTORY:
337 break;
338 case PMBUS_VIRT_RESET_PIN_HISTORY:
339 if (!data->have_pin_max)
340 return -ENXIO;
341 break;
342 case PMBUS_VIRT_RESET_TEMP_HISTORY:
343 if (!data->have_temp_max)
344 return -ENXIO;
345 break;
346 case PMBUS_VIRT_POWER_SAMPLES:
347 if (!data->have_power_sampling)
348 return -ENXIO;
349 ret = adm1275_read_samples(data, client, true);
350 if (ret < 0)
351 break;
352 ret = BIT(ret);
353 break;
354 case PMBUS_VIRT_IN_SAMPLES:
355 case PMBUS_VIRT_CURR_SAMPLES:
356 ret = adm1275_read_samples(data, client, false);
357 if (ret < 0)
358 break;
359 ret = BIT(ret);
360 break;
361 default:
362 ret = -ENODATA;
363 break;
364 }
365 return ret;
366 }
367
adm1275_write_word_data(struct i2c_client * client,int page,int reg,u16 word)368 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
369 u16 word)
370 {
371 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
372 const struct adm1275_data *data = to_adm1275_data(info);
373 int ret;
374
375 if (page > 0)
376 return -ENXIO;
377
378 switch (reg) {
379 case PMBUS_IOUT_UC_FAULT_LIMIT:
380 case PMBUS_IOUT_OC_FAULT_LIMIT:
381 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
382 word);
383 break;
384 case PMBUS_VIRT_RESET_IOUT_HISTORY:
385 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
386 if (!ret && data->have_iout_min)
387 ret = pmbus_write_word_data(client, 0,
388 ADM1293_IOUT_MIN, 0);
389 break;
390 case PMBUS_VIRT_RESET_VOUT_HISTORY:
391 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
392 break;
393 case PMBUS_VIRT_RESET_VIN_HISTORY:
394 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
395 break;
396 case PMBUS_VIRT_RESET_PIN_HISTORY:
397 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
398 if (!ret && data->have_pin_min)
399 ret = pmbus_write_word_data(client, 0,
400 ADM1293_PIN_MIN, 0);
401 break;
402 case PMBUS_VIRT_RESET_TEMP_HISTORY:
403 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
404 break;
405 case PMBUS_VIRT_POWER_SAMPLES:
406 if (!data->have_power_sampling)
407 return -ENXIO;
408 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
409 ret = adm1275_write_samples(data, client, true, ilog2(word));
410 break;
411 case PMBUS_VIRT_IN_SAMPLES:
412 case PMBUS_VIRT_CURR_SAMPLES:
413 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
414 ret = adm1275_write_samples(data, client, false, ilog2(word));
415 break;
416 default:
417 ret = -ENODATA;
418 break;
419 }
420 return ret;
421 }
422
adm1275_read_byte_data(struct i2c_client * client,int page,int reg)423 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
424 {
425 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
426 const struct adm1275_data *data = to_adm1275_data(info);
427 int mfr_status, ret;
428
429 if (page > 0)
430 return -ENXIO;
431
432 switch (reg) {
433 case PMBUS_STATUS_IOUT:
434 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
435 if (ret < 0)
436 break;
437 if (!data->have_oc_fault && !data->have_uc_fault)
438 break;
439 mfr_status = pmbus_read_byte_data(client, page,
440 PMBUS_STATUS_MFR_SPECIFIC);
441 if (mfr_status < 0)
442 return mfr_status;
443 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
444 ret |= data->have_oc_fault ?
445 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
446 }
447 break;
448 case PMBUS_STATUS_VOUT:
449 if (data->have_vout)
450 return -ENODATA;
451 ret = 0;
452 if (data->have_vaux_status) {
453 mfr_status = pmbus_read_byte_data(client, 0,
454 ADM1075_VAUX_STATUS);
455 if (mfr_status < 0)
456 return mfr_status;
457 if (mfr_status & ADM1075_VAUX_OV_WARN)
458 ret |= PB_VOLTAGE_OV_WARNING;
459 if (mfr_status & ADM1075_VAUX_UV_WARN)
460 ret |= PB_VOLTAGE_UV_WARNING;
461 } else if (data->have_mfr_vaux_status) {
462 mfr_status = pmbus_read_byte_data(client, page,
463 PMBUS_STATUS_MFR_SPECIFIC);
464 if (mfr_status < 0)
465 return mfr_status;
466 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
467 ret |= PB_VOLTAGE_OV_WARNING;
468 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
469 ret |= PB_VOLTAGE_UV_WARNING;
470 }
471 break;
472 default:
473 ret = -ENODATA;
474 break;
475 }
476 return ret;
477 }
478
479 static const struct i2c_device_id adm1275_id[] = {
480 { "adm1075", adm1075 },
481 { "adm1272", adm1272 },
482 { "adm1275", adm1275 },
483 { "adm1276", adm1276 },
484 { "adm1278", adm1278 },
485 { "adm1281", adm1281 },
486 { "adm1293", adm1293 },
487 { "adm1294", adm1294 },
488 { }
489 };
490 MODULE_DEVICE_TABLE(i2c, adm1275_id);
491
492 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
adm1275_enable_vout_temp(struct adm1275_data * data,struct i2c_client * client,int config)493 static int adm1275_enable_vout_temp(struct adm1275_data *data,
494 struct i2c_client *client, int config)
495 {
496 int ret;
497
498 if ((config & ADM1278_PMON_DEFCONFIG) != ADM1278_PMON_DEFCONFIG) {
499 config |= ADM1278_PMON_DEFCONFIG;
500 ret = adm1275_write_pmon_config(data, client, config);
501 if (ret < 0) {
502 dev_err(&client->dev, "Failed to enable VOUT/TEMP1 monitoring\n");
503 return ret;
504 }
505 }
506 return 0;
507 }
508
adm1275_probe(struct i2c_client * client)509 static int adm1275_probe(struct i2c_client *client)
510 {
511 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
512 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
513 int config, device_config;
514 int ret;
515 struct pmbus_driver_info *info;
516 struct adm1275_data *data;
517 const struct i2c_device_id *mid;
518 const struct coefficients *coefficients;
519 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
520 int tindex = -1;
521 u32 shunt;
522 u32 avg;
523
524 if (!i2c_check_functionality(client->adapter,
525 I2C_FUNC_SMBUS_READ_BYTE_DATA
526 | I2C_FUNC_SMBUS_BLOCK_DATA))
527 return -ENODEV;
528
529 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
530 if (ret < 0) {
531 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
532 return ret;
533 }
534 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
535 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
536 return -ENODEV;
537 }
538
539 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
540 if (ret < 0) {
541 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
542 return ret;
543 }
544 for (mid = adm1275_id; mid->name[0]; mid++) {
545 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
546 break;
547 }
548 if (!mid->name[0]) {
549 dev_err(&client->dev, "Unsupported device\n");
550 return -ENODEV;
551 }
552
553 if (strcmp(client->name, mid->name) != 0)
554 dev_notice(&client->dev,
555 "Device mismatch: Configured %s, detected %s\n",
556 client->name, mid->name);
557
558 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
559 mid->driver_data == adm1281 || mid->driver_data == adm1293 ||
560 mid->driver_data == adm1294)
561 config_read_fn = i2c_smbus_read_word_data;
562 else
563 config_read_fn = i2c_smbus_read_byte_data;
564 config = config_read_fn(client, ADM1275_PMON_CONFIG);
565 if (config < 0)
566 return config;
567
568 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
569 if (device_config < 0)
570 return device_config;
571
572 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
573 GFP_KERNEL);
574 if (!data)
575 return -ENOMEM;
576
577 if (of_property_read_u32(client->dev.of_node,
578 "shunt-resistor-micro-ohms", &shunt))
579 shunt = 1000; /* 1 mOhm if not set via DT */
580
581 if (shunt == 0)
582 return -EINVAL;
583
584 data->id = mid->driver_data;
585
586 info = &data->info;
587
588 info->pages = 1;
589 info->format[PSC_VOLTAGE_IN] = direct;
590 info->format[PSC_VOLTAGE_OUT] = direct;
591 info->format[PSC_CURRENT_OUT] = direct;
592 info->format[PSC_POWER] = direct;
593 info->format[PSC_TEMPERATURE] = direct;
594 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
595 PMBUS_HAVE_SAMPLES;
596
597 info->read_word_data = adm1275_read_word_data;
598 info->read_byte_data = adm1275_read_byte_data;
599 info->write_word_data = adm1275_write_word_data;
600
601 switch (data->id) {
602 case adm1075:
603 if (device_config & ADM1275_IOUT_WARN2_SELECT)
604 data->have_oc_fault = true;
605 else
606 data->have_uc_fault = true;
607 data->have_pin_max = true;
608 data->have_vaux_status = true;
609
610 coefficients = adm1075_coefficients;
611 vindex = 0;
612 switch (config & ADM1075_IRANGE_MASK) {
613 case ADM1075_IRANGE_25:
614 cindex = 1;
615 pindex = 3;
616 break;
617 case ADM1075_IRANGE_50:
618 cindex = 2;
619 pindex = 4;
620 break;
621 default:
622 dev_err(&client->dev, "Invalid input current range");
623 break;
624 }
625
626 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
627 | PMBUS_HAVE_STATUS_INPUT;
628 if (config & ADM1275_VIN_VOUT_SELECT)
629 info->func[0] |=
630 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
631 break;
632 case adm1272:
633 data->have_vout = true;
634 data->have_pin_max = true;
635 data->have_temp_max = true;
636 data->have_power_sampling = true;
637
638 coefficients = adm1272_coefficients;
639 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
640 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
641 /* pindex depends on the combination of the above */
642 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
643 case 0:
644 default:
645 pindex = 4;
646 break;
647 case ADM1275_VRANGE:
648 pindex = 5;
649 break;
650 case ADM1272_IRANGE:
651 pindex = 6;
652 break;
653 case ADM1275_VRANGE | ADM1272_IRANGE:
654 pindex = 7;
655 break;
656 }
657 tindex = 8;
658
659 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
660 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
661 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
662
663 ret = adm1275_enable_vout_temp(data, client, config);
664 if (ret)
665 return ret;
666
667 if (config & ADM1278_VIN_EN)
668 info->func[0] |= PMBUS_HAVE_VIN;
669 break;
670 case adm1275:
671 if (device_config & ADM1275_IOUT_WARN2_SELECT)
672 data->have_oc_fault = true;
673 else
674 data->have_uc_fault = true;
675 data->have_vout = true;
676
677 coefficients = adm1275_coefficients;
678 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
679 cindex = 2;
680
681 if (config & ADM1275_VIN_VOUT_SELECT)
682 info->func[0] |=
683 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
684 else
685 info->func[0] |=
686 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
687 break;
688 case adm1276:
689 if (device_config & ADM1275_IOUT_WARN2_SELECT)
690 data->have_oc_fault = true;
691 else
692 data->have_uc_fault = true;
693 data->have_vout = true;
694 data->have_pin_max = true;
695
696 coefficients = adm1276_coefficients;
697 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
698 cindex = 2;
699 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
700
701 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
702 | PMBUS_HAVE_STATUS_INPUT;
703 if (config & ADM1275_VIN_VOUT_SELECT)
704 info->func[0] |=
705 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
706 break;
707 case adm1278:
708 case adm1281:
709 data->have_vout = true;
710 data->have_pin_max = true;
711 data->have_temp_max = true;
712 data->have_power_sampling = true;
713
714 coefficients = adm1278_coefficients;
715 vindex = 0;
716 cindex = 1;
717 pindex = 2;
718 tindex = 3;
719
720 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
721 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
722 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
723
724 ret = adm1275_enable_vout_temp(data, client, config);
725 if (ret)
726 return ret;
727
728 if (config & ADM1278_VIN_EN)
729 info->func[0] |= PMBUS_HAVE_VIN;
730 break;
731 case adm1293:
732 case adm1294:
733 data->have_iout_min = true;
734 data->have_pin_min = true;
735 data->have_pin_max = true;
736 data->have_mfr_vaux_status = true;
737 data->have_power_sampling = true;
738
739 coefficients = adm1293_coefficients;
740
741 voindex = 0;
742 switch (config & ADM1293_VIN_SEL_MASK) {
743 case ADM1293_VIN_SEL_012: /* 1.2V */
744 vindex = 0;
745 break;
746 case ADM1293_VIN_SEL_074: /* 7.4V */
747 vindex = 1;
748 break;
749 case ADM1293_VIN_SEL_210: /* 21V */
750 vindex = 2;
751 break;
752 default: /* disabled */
753 break;
754 }
755
756 switch (config & ADM1293_IRANGE_MASK) {
757 case ADM1293_IRANGE_25:
758 cindex = 3;
759 break;
760 case ADM1293_IRANGE_50:
761 cindex = 4;
762 break;
763 case ADM1293_IRANGE_100:
764 cindex = 5;
765 break;
766 case ADM1293_IRANGE_200:
767 cindex = 6;
768 break;
769 }
770
771 if (vindex >= 0)
772 pindex = 7 + vindex * 4 + (cindex - 3);
773
774 if (config & ADM1293_VAUX_EN)
775 info->func[0] |=
776 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
777
778 info->func[0] |= PMBUS_HAVE_PIN |
779 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
780
781 break;
782 default:
783 dev_err(&client->dev, "Unsupported device\n");
784 return -ENODEV;
785 }
786
787 if (data->have_power_sampling &&
788 of_property_read_u32(client->dev.of_node,
789 "adi,power-sample-average", &avg) == 0) {
790 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
791 BIT(__fls(avg)) != avg) {
792 dev_err(&client->dev,
793 "Invalid number of power samples");
794 return -EINVAL;
795 }
796 ret = adm1275_write_samples(data, client, true, ilog2(avg));
797 if (ret < 0) {
798 dev_err(&client->dev,
799 "Setting power sample averaging failed with error %d",
800 ret);
801 return ret;
802 }
803 }
804
805 if (of_property_read_u32(client->dev.of_node,
806 "adi,volt-curr-sample-average", &avg) == 0) {
807 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
808 BIT(__fls(avg)) != avg) {
809 dev_err(&client->dev,
810 "Invalid number of voltage/current samples");
811 return -EINVAL;
812 }
813 ret = adm1275_write_samples(data, client, false, ilog2(avg));
814 if (ret < 0) {
815 dev_err(&client->dev,
816 "Setting voltage and current sample averaging failed with error %d",
817 ret);
818 return ret;
819 }
820 }
821
822 if (voindex < 0)
823 voindex = vindex;
824 if (vindex >= 0) {
825 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
826 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
827 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
828 }
829 if (voindex >= 0) {
830 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
831 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
832 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
833 }
834 if (cindex >= 0) {
835 /* Scale current with sense resistor value */
836 info->m[PSC_CURRENT_OUT] =
837 coefficients[cindex].m * shunt / 1000;
838 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
839 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
840 }
841 if (pindex >= 0) {
842 info->m[PSC_POWER] =
843 coefficients[pindex].m * shunt / 1000;
844 info->b[PSC_POWER] = coefficients[pindex].b;
845 info->R[PSC_POWER] = coefficients[pindex].R;
846 }
847 if (tindex >= 0) {
848 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
849 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
850 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
851 }
852
853 return pmbus_do_probe(client, info);
854 }
855
856 static struct i2c_driver adm1275_driver = {
857 .driver = {
858 .name = "adm1275",
859 },
860 .probe = adm1275_probe,
861 .id_table = adm1275_id,
862 };
863
864 module_i2c_driver(adm1275_driver);
865
866 MODULE_AUTHOR("Guenter Roeck");
867 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
868 MODULE_LICENSE("GPL");
869 MODULE_IMPORT_NS(PMBUS);
870