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, 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_CONFIG 0xd4
31
32 #define ADM1275_VIN_VOUT_SELECT BIT(6)
33 #define ADM1275_VRANGE BIT(5)
34 #define ADM1075_IRANGE_50 BIT(4)
35 #define ADM1075_IRANGE_25 BIT(3)
36 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
37
38 #define ADM1272_IRANGE BIT(0)
39
40 #define ADM1278_TSFILT BIT(15)
41 #define ADM1278_TEMP1_EN BIT(3)
42 #define ADM1278_VIN_EN BIT(2)
43 #define ADM1278_VOUT_EN BIT(1)
44
45 #define ADM1278_PMON_DEFCONFIG (ADM1278_VOUT_EN | ADM1278_TEMP1_EN | ADM1278_TSFILT)
46
47 #define ADM1293_IRANGE_25 0
48 #define ADM1293_IRANGE_50 BIT(6)
49 #define ADM1293_IRANGE_100 BIT(7)
50 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
51 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
52
53 #define ADM1293_VIN_SEL_012 BIT(2)
54 #define ADM1293_VIN_SEL_074 BIT(3)
55 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
56 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
57
58 #define ADM1293_VAUX_EN BIT(1)
59
60 #define ADM1278_PEAK_TEMP 0xd7
61 #define ADM1275_IOUT_WARN2_LIMIT 0xd7
62 #define ADM1275_DEVICE_CONFIG 0xd8
63
64 #define ADM1275_IOUT_WARN2_SELECT BIT(4)
65
66 #define ADM1276_PEAK_PIN 0xda
67 #define ADM1075_READ_VAUX 0xdd
68 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde
69 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
70 #define ADM1293_IOUT_MIN 0xe3
71 #define ADM1293_PIN_MIN 0xe4
72 #define ADM1075_VAUX_STATUS 0xf6
73
74 #define ADM1075_VAUX_OV_WARN BIT(7)
75 #define ADM1075_VAUX_UV_WARN BIT(6)
76
77 #define ADM1275_VI_AVG_SHIFT 0
78 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
79 ADM1275_VI_AVG_SHIFT)
80 #define ADM1275_SAMPLES_AVG_MAX 128
81
82 #define ADM1278_PWR_AVG_SHIFT 11
83 #define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
84 ADM1278_PWR_AVG_SHIFT)
85 #define ADM1278_VI_AVG_SHIFT 8
86 #define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
87 ADM1278_VI_AVG_SHIFT)
88
89 struct adm1275_data {
90 int id;
91 bool have_oc_fault;
92 bool have_uc_fault;
93 bool have_vout;
94 bool have_vaux_status;
95 bool have_mfr_vaux_status;
96 bool have_iout_min;
97 bool have_pin_min;
98 bool have_pin_max;
99 bool have_temp_max;
100 bool have_power_sampling;
101 struct pmbus_driver_info info;
102 };
103
104 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
105
106 struct coefficients {
107 s16 m;
108 s16 b;
109 s16 R;
110 };
111
112 static const struct coefficients adm1075_coefficients[] = {
113 [0] = { 27169, 0, -1 }, /* voltage */
114 [1] = { 806, 20475, -1 }, /* current, irange25 */
115 [2] = { 404, 20475, -1 }, /* current, irange50 */
116 [3] = { 8549, 0, -1 }, /* power, irange25 */
117 [4] = { 4279, 0, -1 }, /* power, irange50 */
118 };
119
120 static const struct coefficients adm1272_coefficients[] = {
121 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
122 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
123 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
124 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
125 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
126 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
127 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
128 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
129 [8] = { 42, 31871, -1 }, /* temperature */
130
131 };
132
133 static const struct coefficients adm1275_coefficients[] = {
134 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
135 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
136 [2] = { 807, 20475, -1 }, /* current */
137 };
138
139 static const struct coefficients adm1276_coefficients[] = {
140 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
141 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
142 [2] = { 807, 20475, -1 }, /* current */
143 [3] = { 6043, 0, -2 }, /* power, vrange set */
144 [4] = { 2115, 0, -1 }, /* power, vrange not set */
145 };
146
147 static const struct coefficients adm1278_coefficients[] = {
148 [0] = { 19599, 0, -2 }, /* voltage */
149 [1] = { 800, 20475, -1 }, /* current */
150 [2] = { 6123, 0, -2 }, /* power */
151 [3] = { 42, 31880, -1 }, /* temperature */
152 };
153
154 static const struct coefficients adm1293_coefficients[] = {
155 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
156 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
157 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
158 [3] = { 8000, -100, -2 }, /* current, irange25 */
159 [4] = { 4000, -100, -2 }, /* current, irange50 */
160 [5] = { 20000, -1000, -3 }, /* current, irange100 */
161 [6] = { 10000, -1000, -3 }, /* current, irange200 */
162 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
163 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
164 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
165 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
166 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
167 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
168 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
169 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
170 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
171 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
172 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
173 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
174 };
175
adm1275_read_pmon_config(const struct adm1275_data * data,struct i2c_client * client,bool is_power)176 static int adm1275_read_pmon_config(const struct adm1275_data *data,
177 struct i2c_client *client, bool is_power)
178 {
179 int shift, ret;
180 u16 mask;
181
182 /*
183 * The PMON configuration register is a 16-bit register only on chips
184 * supporting power average sampling. On other chips it is an 8-bit
185 * register.
186 */
187 if (data->have_power_sampling) {
188 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
189 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
190 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
191 } else {
192 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
193 mask = ADM1275_VI_AVG_MASK;
194 shift = ADM1275_VI_AVG_SHIFT;
195 }
196 if (ret < 0)
197 return ret;
198
199 return (ret & mask) >> shift;
200 }
201
adm1275_write_pmon_config(const struct adm1275_data * data,struct i2c_client * client,bool is_power,u16 word)202 static int adm1275_write_pmon_config(const struct adm1275_data *data,
203 struct i2c_client *client,
204 bool is_power, u16 word)
205 {
206 int shift, ret;
207 u16 mask;
208
209 if (data->have_power_sampling) {
210 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
211 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
212 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
213 } else {
214 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
215 mask = ADM1275_VI_AVG_MASK;
216 shift = ADM1275_VI_AVG_SHIFT;
217 }
218 if (ret < 0)
219 return ret;
220
221 word = (ret & ~mask) | ((word << shift) & mask);
222 if (data->have_power_sampling)
223 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
224 word);
225 else
226 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
227 word);
228
229 return ret;
230 }
231
adm1275_read_word_data(struct i2c_client * client,int page,int phase,int reg)232 static int adm1275_read_word_data(struct i2c_client *client, int page,
233 int phase, int reg)
234 {
235 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
236 const struct adm1275_data *data = to_adm1275_data(info);
237 int ret = 0;
238
239 if (page > 0)
240 return -ENXIO;
241
242 switch (reg) {
243 case PMBUS_IOUT_UC_FAULT_LIMIT:
244 if (!data->have_uc_fault)
245 return -ENXIO;
246 ret = pmbus_read_word_data(client, 0, 0xff,
247 ADM1275_IOUT_WARN2_LIMIT);
248 break;
249 case PMBUS_IOUT_OC_FAULT_LIMIT:
250 if (!data->have_oc_fault)
251 return -ENXIO;
252 ret = pmbus_read_word_data(client, 0, 0xff,
253 ADM1275_IOUT_WARN2_LIMIT);
254 break;
255 case PMBUS_VOUT_OV_WARN_LIMIT:
256 if (data->have_vout)
257 return -ENODATA;
258 ret = pmbus_read_word_data(client, 0, 0xff,
259 ADM1075_VAUX_OV_WARN_LIMIT);
260 break;
261 case PMBUS_VOUT_UV_WARN_LIMIT:
262 if (data->have_vout)
263 return -ENODATA;
264 ret = pmbus_read_word_data(client, 0, 0xff,
265 ADM1075_VAUX_UV_WARN_LIMIT);
266 break;
267 case PMBUS_READ_VOUT:
268 if (data->have_vout)
269 return -ENODATA;
270 ret = pmbus_read_word_data(client, 0, 0xff,
271 ADM1075_READ_VAUX);
272 break;
273 case PMBUS_VIRT_READ_IOUT_MIN:
274 if (!data->have_iout_min)
275 return -ENXIO;
276 ret = pmbus_read_word_data(client, 0, 0xff,
277 ADM1293_IOUT_MIN);
278 break;
279 case PMBUS_VIRT_READ_IOUT_MAX:
280 ret = pmbus_read_word_data(client, 0, 0xff,
281 ADM1275_PEAK_IOUT);
282 break;
283 case PMBUS_VIRT_READ_VOUT_MAX:
284 ret = pmbus_read_word_data(client, 0, 0xff,
285 ADM1275_PEAK_VOUT);
286 break;
287 case PMBUS_VIRT_READ_VIN_MAX:
288 ret = pmbus_read_word_data(client, 0, 0xff,
289 ADM1275_PEAK_VIN);
290 break;
291 case PMBUS_VIRT_READ_PIN_MIN:
292 if (!data->have_pin_min)
293 return -ENXIO;
294 ret = pmbus_read_word_data(client, 0, 0xff,
295 ADM1293_PIN_MIN);
296 break;
297 case PMBUS_VIRT_READ_PIN_MAX:
298 if (!data->have_pin_max)
299 return -ENXIO;
300 ret = pmbus_read_word_data(client, 0, 0xff,
301 ADM1276_PEAK_PIN);
302 break;
303 case PMBUS_VIRT_READ_TEMP_MAX:
304 if (!data->have_temp_max)
305 return -ENXIO;
306 ret = pmbus_read_word_data(client, 0, 0xff,
307 ADM1278_PEAK_TEMP);
308 break;
309 case PMBUS_VIRT_RESET_IOUT_HISTORY:
310 case PMBUS_VIRT_RESET_VOUT_HISTORY:
311 case PMBUS_VIRT_RESET_VIN_HISTORY:
312 break;
313 case PMBUS_VIRT_RESET_PIN_HISTORY:
314 if (!data->have_pin_max)
315 return -ENXIO;
316 break;
317 case PMBUS_VIRT_RESET_TEMP_HISTORY:
318 if (!data->have_temp_max)
319 return -ENXIO;
320 break;
321 case PMBUS_VIRT_POWER_SAMPLES:
322 if (!data->have_power_sampling)
323 return -ENXIO;
324 ret = adm1275_read_pmon_config(data, client, true);
325 if (ret < 0)
326 break;
327 ret = BIT(ret);
328 break;
329 case PMBUS_VIRT_IN_SAMPLES:
330 case PMBUS_VIRT_CURR_SAMPLES:
331 ret = adm1275_read_pmon_config(data, client, false);
332 if (ret < 0)
333 break;
334 ret = BIT(ret);
335 break;
336 default:
337 ret = -ENODATA;
338 break;
339 }
340 return ret;
341 }
342
adm1275_write_word_data(struct i2c_client * client,int page,int reg,u16 word)343 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
344 u16 word)
345 {
346 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
347 const struct adm1275_data *data = to_adm1275_data(info);
348 int ret;
349
350 if (page > 0)
351 return -ENXIO;
352
353 switch (reg) {
354 case PMBUS_IOUT_UC_FAULT_LIMIT:
355 case PMBUS_IOUT_OC_FAULT_LIMIT:
356 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
357 word);
358 break;
359 case PMBUS_VIRT_RESET_IOUT_HISTORY:
360 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
361 if (!ret && data->have_iout_min)
362 ret = pmbus_write_word_data(client, 0,
363 ADM1293_IOUT_MIN, 0);
364 break;
365 case PMBUS_VIRT_RESET_VOUT_HISTORY:
366 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
367 break;
368 case PMBUS_VIRT_RESET_VIN_HISTORY:
369 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
370 break;
371 case PMBUS_VIRT_RESET_PIN_HISTORY:
372 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
373 if (!ret && data->have_pin_min)
374 ret = pmbus_write_word_data(client, 0,
375 ADM1293_PIN_MIN, 0);
376 break;
377 case PMBUS_VIRT_RESET_TEMP_HISTORY:
378 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
379 break;
380 case PMBUS_VIRT_POWER_SAMPLES:
381 if (!data->have_power_sampling)
382 return -ENXIO;
383 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
384 ret = adm1275_write_pmon_config(data, client, true,
385 ilog2(word));
386 break;
387 case PMBUS_VIRT_IN_SAMPLES:
388 case PMBUS_VIRT_CURR_SAMPLES:
389 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
390 ret = adm1275_write_pmon_config(data, client, false,
391 ilog2(word));
392 break;
393 default:
394 ret = -ENODATA;
395 break;
396 }
397 return ret;
398 }
399
adm1275_read_byte_data(struct i2c_client * client,int page,int reg)400 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
401 {
402 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
403 const struct adm1275_data *data = to_adm1275_data(info);
404 int mfr_status, ret;
405
406 if (page > 0)
407 return -ENXIO;
408
409 switch (reg) {
410 case PMBUS_STATUS_IOUT:
411 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
412 if (ret < 0)
413 break;
414 if (!data->have_oc_fault && !data->have_uc_fault)
415 break;
416 mfr_status = pmbus_read_byte_data(client, page,
417 PMBUS_STATUS_MFR_SPECIFIC);
418 if (mfr_status < 0)
419 return mfr_status;
420 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
421 ret |= data->have_oc_fault ?
422 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
423 }
424 break;
425 case PMBUS_STATUS_VOUT:
426 if (data->have_vout)
427 return -ENODATA;
428 ret = 0;
429 if (data->have_vaux_status) {
430 mfr_status = pmbus_read_byte_data(client, 0,
431 ADM1075_VAUX_STATUS);
432 if (mfr_status < 0)
433 return mfr_status;
434 if (mfr_status & ADM1075_VAUX_OV_WARN)
435 ret |= PB_VOLTAGE_OV_WARNING;
436 if (mfr_status & ADM1075_VAUX_UV_WARN)
437 ret |= PB_VOLTAGE_UV_WARNING;
438 } else if (data->have_mfr_vaux_status) {
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 & ADM1293_MFR_STATUS_VAUX_OV_WARN)
444 ret |= PB_VOLTAGE_OV_WARNING;
445 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
446 ret |= PB_VOLTAGE_UV_WARNING;
447 }
448 break;
449 default:
450 ret = -ENODATA;
451 break;
452 }
453 return ret;
454 }
455
456 static const struct i2c_device_id adm1275_id[] = {
457 { "adm1075", adm1075 },
458 { "adm1272", adm1272 },
459 { "adm1275", adm1275 },
460 { "adm1276", adm1276 },
461 { "adm1278", adm1278 },
462 { "adm1293", adm1293 },
463 { "adm1294", adm1294 },
464 { }
465 };
466 MODULE_DEVICE_TABLE(i2c, adm1275_id);
467
468 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
adm1275_enable_vout_temp(struct i2c_client * client,int config)469 static int adm1275_enable_vout_temp(struct i2c_client *client, int config)
470 {
471 int ret;
472
473 if ((config & ADM1278_PMON_DEFCONFIG) != ADM1278_PMON_DEFCONFIG) {
474 config |= ADM1278_PMON_DEFCONFIG;
475 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, config);
476 if (ret < 0) {
477 dev_err(&client->dev, "Failed to enable VOUT/TEMP1 monitoring\n");
478 return ret;
479 }
480 }
481 return 0;
482 }
483
adm1275_probe(struct i2c_client * client)484 static int adm1275_probe(struct i2c_client *client)
485 {
486 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
487 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
488 int config, device_config;
489 int ret;
490 struct pmbus_driver_info *info;
491 struct adm1275_data *data;
492 const struct i2c_device_id *mid;
493 const struct coefficients *coefficients;
494 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
495 int tindex = -1;
496 u32 shunt;
497 u32 avg;
498
499 if (!i2c_check_functionality(client->adapter,
500 I2C_FUNC_SMBUS_READ_BYTE_DATA
501 | I2C_FUNC_SMBUS_BLOCK_DATA))
502 return -ENODEV;
503
504 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
505 if (ret < 0) {
506 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
507 return ret;
508 }
509 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
510 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
511 return -ENODEV;
512 }
513
514 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
515 if (ret < 0) {
516 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
517 return ret;
518 }
519 for (mid = adm1275_id; mid->name[0]; mid++) {
520 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
521 break;
522 }
523 if (!mid->name[0]) {
524 dev_err(&client->dev, "Unsupported device\n");
525 return -ENODEV;
526 }
527
528 if (strcmp(client->name, mid->name) != 0)
529 dev_notice(&client->dev,
530 "Device mismatch: Configured %s, detected %s\n",
531 client->name, mid->name);
532
533 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
534 mid->driver_data == adm1293 || mid->driver_data == adm1294)
535 config_read_fn = i2c_smbus_read_word_data;
536 else
537 config_read_fn = i2c_smbus_read_byte_data;
538 config = config_read_fn(client, ADM1275_PMON_CONFIG);
539 if (config < 0)
540 return config;
541
542 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
543 if (device_config < 0)
544 return device_config;
545
546 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
547 GFP_KERNEL);
548 if (!data)
549 return -ENOMEM;
550
551 if (of_property_read_u32(client->dev.of_node,
552 "shunt-resistor-micro-ohms", &shunt))
553 shunt = 1000; /* 1 mOhm if not set via DT */
554
555 if (shunt == 0)
556 return -EINVAL;
557
558 data->id = mid->driver_data;
559
560 info = &data->info;
561
562 info->pages = 1;
563 info->format[PSC_VOLTAGE_IN] = direct;
564 info->format[PSC_VOLTAGE_OUT] = direct;
565 info->format[PSC_CURRENT_OUT] = direct;
566 info->format[PSC_POWER] = direct;
567 info->format[PSC_TEMPERATURE] = direct;
568 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
569 PMBUS_HAVE_SAMPLES;
570
571 info->read_word_data = adm1275_read_word_data;
572 info->read_byte_data = adm1275_read_byte_data;
573 info->write_word_data = adm1275_write_word_data;
574
575 switch (data->id) {
576 case adm1075:
577 if (device_config & ADM1275_IOUT_WARN2_SELECT)
578 data->have_oc_fault = true;
579 else
580 data->have_uc_fault = true;
581 data->have_pin_max = true;
582 data->have_vaux_status = true;
583
584 coefficients = adm1075_coefficients;
585 vindex = 0;
586 switch (config & ADM1075_IRANGE_MASK) {
587 case ADM1075_IRANGE_25:
588 cindex = 1;
589 pindex = 3;
590 break;
591 case ADM1075_IRANGE_50:
592 cindex = 2;
593 pindex = 4;
594 break;
595 default:
596 dev_err(&client->dev, "Invalid input current range");
597 break;
598 }
599
600 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
601 | PMBUS_HAVE_STATUS_INPUT;
602 if (config & ADM1275_VIN_VOUT_SELECT)
603 info->func[0] |=
604 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
605 break;
606 case adm1272:
607 data->have_vout = true;
608 data->have_pin_max = true;
609 data->have_temp_max = true;
610 data->have_power_sampling = true;
611
612 coefficients = adm1272_coefficients;
613 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
614 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
615 /* pindex depends on the combination of the above */
616 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
617 case 0:
618 default:
619 pindex = 4;
620 break;
621 case ADM1275_VRANGE:
622 pindex = 5;
623 break;
624 case ADM1272_IRANGE:
625 pindex = 6;
626 break;
627 case ADM1275_VRANGE | ADM1272_IRANGE:
628 pindex = 7;
629 break;
630 }
631 tindex = 8;
632
633 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
634 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
635 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
636
637 ret = adm1275_enable_vout_temp(client, config);
638 if (ret)
639 return ret;
640
641 if (config & ADM1278_VIN_EN)
642 info->func[0] |= PMBUS_HAVE_VIN;
643 break;
644 case adm1275:
645 if (device_config & ADM1275_IOUT_WARN2_SELECT)
646 data->have_oc_fault = true;
647 else
648 data->have_uc_fault = true;
649 data->have_vout = true;
650
651 coefficients = adm1275_coefficients;
652 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
653 cindex = 2;
654
655 if (config & ADM1275_VIN_VOUT_SELECT)
656 info->func[0] |=
657 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
658 else
659 info->func[0] |=
660 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
661 break;
662 case adm1276:
663 if (device_config & ADM1275_IOUT_WARN2_SELECT)
664 data->have_oc_fault = true;
665 else
666 data->have_uc_fault = true;
667 data->have_vout = true;
668 data->have_pin_max = true;
669
670 coefficients = adm1276_coefficients;
671 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
672 cindex = 2;
673 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
674
675 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
676 | PMBUS_HAVE_STATUS_INPUT;
677 if (config & ADM1275_VIN_VOUT_SELECT)
678 info->func[0] |=
679 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
680 break;
681 case adm1278:
682 data->have_vout = true;
683 data->have_pin_max = true;
684 data->have_temp_max = true;
685 data->have_power_sampling = true;
686
687 coefficients = adm1278_coefficients;
688 vindex = 0;
689 cindex = 1;
690 pindex = 2;
691 tindex = 3;
692
693 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
694 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
695 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
696
697 ret = adm1275_enable_vout_temp(client, config);
698 if (ret)
699 return ret;
700
701 if (config & ADM1278_VIN_EN)
702 info->func[0] |= PMBUS_HAVE_VIN;
703 break;
704 case adm1293:
705 case adm1294:
706 data->have_iout_min = true;
707 data->have_pin_min = true;
708 data->have_pin_max = true;
709 data->have_mfr_vaux_status = true;
710 data->have_power_sampling = true;
711
712 coefficients = adm1293_coefficients;
713
714 voindex = 0;
715 switch (config & ADM1293_VIN_SEL_MASK) {
716 case ADM1293_VIN_SEL_012: /* 1.2V */
717 vindex = 0;
718 break;
719 case ADM1293_VIN_SEL_074: /* 7.4V */
720 vindex = 1;
721 break;
722 case ADM1293_VIN_SEL_210: /* 21V */
723 vindex = 2;
724 break;
725 default: /* disabled */
726 break;
727 }
728
729 switch (config & ADM1293_IRANGE_MASK) {
730 case ADM1293_IRANGE_25:
731 cindex = 3;
732 break;
733 case ADM1293_IRANGE_50:
734 cindex = 4;
735 break;
736 case ADM1293_IRANGE_100:
737 cindex = 5;
738 break;
739 case ADM1293_IRANGE_200:
740 cindex = 6;
741 break;
742 }
743
744 if (vindex >= 0)
745 pindex = 7 + vindex * 4 + (cindex - 3);
746
747 if (config & ADM1293_VAUX_EN)
748 info->func[0] |=
749 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
750
751 info->func[0] |= PMBUS_HAVE_PIN |
752 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
753
754 break;
755 default:
756 dev_err(&client->dev, "Unsupported device\n");
757 return -ENODEV;
758 }
759
760 if (data->have_power_sampling &&
761 of_property_read_u32(client->dev.of_node,
762 "adi,power-sample-average", &avg) == 0) {
763 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
764 BIT(__fls(avg)) != avg) {
765 dev_err(&client->dev,
766 "Invalid number of power samples");
767 return -EINVAL;
768 }
769 ret = adm1275_write_pmon_config(data, client, true,
770 ilog2(avg));
771 if (ret < 0) {
772 dev_err(&client->dev,
773 "Setting power sample averaging failed with error %d",
774 ret);
775 return ret;
776 }
777 }
778
779 if (of_property_read_u32(client->dev.of_node,
780 "adi,volt-curr-sample-average", &avg) == 0) {
781 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
782 BIT(__fls(avg)) != avg) {
783 dev_err(&client->dev,
784 "Invalid number of voltage/current samples");
785 return -EINVAL;
786 }
787 ret = adm1275_write_pmon_config(data, client, false,
788 ilog2(avg));
789 if (ret < 0) {
790 dev_err(&client->dev,
791 "Setting voltage and current sample averaging failed with error %d",
792 ret);
793 return ret;
794 }
795 }
796
797 if (voindex < 0)
798 voindex = vindex;
799 if (vindex >= 0) {
800 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
801 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
802 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
803 }
804 if (voindex >= 0) {
805 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
806 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
807 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
808 }
809 if (cindex >= 0) {
810 /* Scale current with sense resistor value */
811 info->m[PSC_CURRENT_OUT] =
812 coefficients[cindex].m * shunt / 1000;
813 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
814 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
815 }
816 if (pindex >= 0) {
817 info->m[PSC_POWER] =
818 coefficients[pindex].m * shunt / 1000;
819 info->b[PSC_POWER] = coefficients[pindex].b;
820 info->R[PSC_POWER] = coefficients[pindex].R;
821 }
822 if (tindex >= 0) {
823 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
824 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
825 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
826 }
827
828 return pmbus_do_probe(client, info);
829 }
830
831 static struct i2c_driver adm1275_driver = {
832 .driver = {
833 .name = "adm1275",
834 },
835 .probe_new = adm1275_probe,
836 .id_table = adm1275_id,
837 };
838
839 module_i2c_driver(adm1275_driver);
840
841 MODULE_AUTHOR("Guenter Roeck");
842 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
843 MODULE_LICENSE("GPL");
844 MODULE_IMPORT_NS(PMBUS);
845