870 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller4 * and Digital Power Monitor5 *6 * Copyright (c) 2011 Ericsson AB.7 * Copyright (c) 2018 Guenter Roeck8 */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 21enum 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 0xd028#define ADM1275_PEAK_VIN 0xd129#define ADM1275_PEAK_VOUT 0xd230#define ADM1275_PMON_CONTROL 0xd331#define ADM1275_PMON_CONFIG 0xd432 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_25 051#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 0xd764#define ADM1275_IOUT_WARN2_LIMIT 0xd765#define ADM1275_DEVICE_CONFIG 0xd866 67#define ADM1275_IOUT_WARN2_SELECT BIT(4)68 69#define ADM1276_PEAK_PIN 0xda70#define ADM1075_READ_VAUX 0xdd71#define ADM1075_VAUX_OV_WARN_LIMIT 0xde72#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf73#define ADM1293_IOUT_MIN 0xe374#define ADM1293_PIN_MIN 0xe475#define ADM1075_VAUX_STATUS 0xf676 77#define ADM1075_VAUX_OV_WARN BIT(7)78#define ADM1075_VAUX_UV_WARN BIT(6)79 80#define ADM1275_VI_AVG_SHIFT 081#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \82 ADM1275_VI_AVG_SHIFT)83#define ADM1275_SAMPLES_AVG_MAX 12884 85#define ADM1278_PWR_AVG_SHIFT 1186#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \87 ADM1278_PWR_AVG_SHIFT)88#define ADM1278_VI_AVG_SHIFT 889#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \90 ADM1278_VI_AVG_SHIFT)91 92struct 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 109struct coefficients {110 s16 m;111 s16 b;112 s16 R;113};114 115static 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 123static 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 136static 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 142static 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 150static 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 157static 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 179static 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 chips187 * supporting power average sampling. On other chips it is an 8-bit188 * 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 205static 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 else218 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,219 word);220 221 /*222 * We still want to re-enable conversions if writing into223 * 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 233static 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 257static 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 368static 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 423static 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 479static 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};490MODULE_DEVICE_TABLE(i2c, adm1275_id);491 492/* Enable VOUT & TEMP1 if not enabled (disabled by default) */493static 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 509static 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_DATA526 | 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 else563 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 else606 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_PIN627 | 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 else674 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 else685 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 else692 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_PIN702 | 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 856static struct i2c_driver adm1275_driver = {857 .driver = {858 .name = "adm1275",859 },860 .probe = adm1275_probe,861 .id_table = adm1275_id,862};863 864module_i2c_driver(adm1275_driver);865 866MODULE_AUTHOR("Guenter Roeck");867MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");868MODULE_LICENSE("GPL");869MODULE_IMPORT_NS(PMBUS);870