// SPDX-License-Identifier: GPL-2.0-or-later /* * Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066 * * Copyright (c) 2011 Ericsson AB. * Copyright (c) 2013 Guenter Roeck */ #include #include #include #include #include #include #include #include #include "pmbus.h" enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i }; #define LM25066_READ_VAUX 0xd0 #define LM25066_MFR_READ_IIN 0xd1 #define LM25066_MFR_READ_PIN 0xd2 #define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3 #define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4 #define LM25066_READ_PIN_PEAK 0xd5 #define LM25066_CLEAR_PIN_PEAK 0xd6 #define LM25066_DEVICE_SETUP 0xd9 #define LM25066_READ_AVG_VIN 0xdc #define LM25066_SAMPLES_FOR_AVG 0xdb #define LM25066_READ_AVG_VOUT 0xdd #define LM25066_READ_AVG_IIN 0xde #define LM25066_READ_AVG_PIN 0xdf #define LM25066_DEV_SETUP_CL BIT(4) /* Current limit */ #define LM25066_SAMPLES_FOR_AVG_MAX 4096 /* LM25056 only */ #define LM25056_VAUX_OV_WARN_LIMIT 0xe3 #define LM25056_VAUX_UV_WARN_LIMIT 0xe4 #define LM25056_MFR_STS_VAUX_OV_WARN BIT(1) #define LM25056_MFR_STS_VAUX_UV_WARN BIT(0) struct __coeff { short m, b, R; }; #define PSC_CURRENT_IN_L (PSC_NUM_CLASSES) #define PSC_POWER_L (PSC_NUM_CLASSES + 1) static struct __coeff lm25066_coeff[][PSC_NUM_CLASSES + 2] = { [lm25056] = { [PSC_VOLTAGE_IN] = { .m = 16296, .b = 1343, .R = -2, }, [PSC_CURRENT_IN] = { .m = 13797, .b = -1833, .R = -2, }, [PSC_CURRENT_IN_L] = { .m = 6726, .b = -537, .R = -2, }, [PSC_POWER] = { .m = 5501, .b = -2908, .R = -3, }, [PSC_POWER_L] = { .m = 26882, .b = -5646, .R = -4, }, [PSC_TEMPERATURE] = { .m = 1580, .b = -14500, .R = -2, }, }, [lm25066] = { [PSC_VOLTAGE_IN] = { .m = 22070, .b = -1800, .R = -2, }, [PSC_VOLTAGE_OUT] = { .m = 22070, .b = -1800, .R = -2, }, [PSC_CURRENT_IN] = { .m = 13661, .b = -5200, .R = -2, }, [PSC_CURRENT_IN_L] = { .m = 6852, .b = -3100, .R = -2, }, [PSC_POWER] = { .m = 736, .b = -3300, .R = -2, }, [PSC_POWER_L] = { .m = 369, .b = -1900, .R = -2, }, [PSC_TEMPERATURE] = { .m = 16, }, }, [lm5064] = { [PSC_VOLTAGE_IN] = { .m = 4611, .b = -642, .R = -2, }, [PSC_VOLTAGE_OUT] = { .m = 4621, .b = 423, .R = -2, }, [PSC_CURRENT_IN] = { .m = 10742, .b = 1552, .R = -2, }, [PSC_CURRENT_IN_L] = { .m = 5456, .b = 2118, .R = -2, }, [PSC_POWER] = { .m = 1204, .b = 8524, .R = -3, }, [PSC_POWER_L] = { .m = 612, .b = 11202, .R = -3, }, [PSC_TEMPERATURE] = { .m = 16, }, }, [lm5066] = { [PSC_VOLTAGE_IN] = { .m = 4587, .b = -1200, .R = -2, }, [PSC_VOLTAGE_OUT] = { .m = 4587, .b = -2400, .R = -2, }, [PSC_CURRENT_IN] = { .m = 10753, .b = -1200, .R = -2, }, [PSC_CURRENT_IN_L] = { .m = 5405, .b = -600, .R = -2, }, [PSC_POWER] = { .m = 1204, .b = -6000, .R = -3, }, [PSC_POWER_L] = { .m = 605, .b = -8000, .R = -3, }, [PSC_TEMPERATURE] = { .m = 16, }, }, [lm5066i] = { [PSC_VOLTAGE_IN] = { .m = 4617, .b = -140, .R = -2, }, [PSC_VOLTAGE_OUT] = { .m = 4602, .b = 500, .R = -2, }, [PSC_CURRENT_IN] = { .m = 15076, .b = -504, .R = -2, }, [PSC_CURRENT_IN_L] = { .m = 7645, .b = 100, .R = -2, }, [PSC_POWER] = { .m = 1701, .b = -4000, .R = -3, }, [PSC_POWER_L] = { .m = 861, .b = -965, .R = -3, }, [PSC_TEMPERATURE] = { .m = 16, }, }, }; struct lm25066_data { int id; u16 rlimit; /* Maximum register value */ struct pmbus_driver_info info; }; #define to_lm25066_data(x) container_of(x, struct lm25066_data, info) static const struct i2c_device_id lm25066_id[]; static int lm25066_read_word_data(struct i2c_client *client, int page, int phase, int reg) { const struct pmbus_driver_info *info = pmbus_get_driver_info(client); const struct lm25066_data *data = to_lm25066_data(info); int ret; switch (reg) { case PMBUS_VIRT_READ_VMON: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_VAUX); if (ret < 0) break; /* Adjust returned value to match VIN coefficients */ switch (data->id) { case lm25056: /* VIN: 6.14 mV VAUX: 293 uV LSB */ ret = DIV_ROUND_CLOSEST(ret * 293, 6140); break; case lm25066: /* VIN: 4.54 mV VAUX: 283.2 uV LSB */ ret = DIV_ROUND_CLOSEST(ret * 2832, 45400); break; case lm5064: /* VIN: 4.53 mV VAUX: 700 uV LSB */ ret = DIV_ROUND_CLOSEST(ret * 70, 453); break; case lm5066: case lm5066i: /* VIN: 2.18 mV VAUX: 725 uV LSB */ ret = DIV_ROUND_CLOSEST(ret * 725, 2180); break; } break; case PMBUS_READ_IIN: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_MFR_READ_IIN); break; case PMBUS_READ_PIN: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_MFR_READ_PIN); break; case PMBUS_IIN_OC_WARN_LIMIT: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_MFR_IIN_OC_WARN_LIMIT); break; case PMBUS_PIN_OP_WARN_LIMIT: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_MFR_PIN_OP_WARN_LIMIT); break; case PMBUS_VIRT_READ_VIN_AVG: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_AVG_VIN); break; case PMBUS_VIRT_READ_VOUT_AVG: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_AVG_VOUT); break; case PMBUS_VIRT_READ_IIN_AVG: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_AVG_IIN); break; case PMBUS_VIRT_READ_PIN_AVG: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_AVG_PIN); break; case PMBUS_VIRT_READ_PIN_MAX: ret = pmbus_read_word_data(client, 0, 0xff, LM25066_READ_PIN_PEAK); break; case PMBUS_VIRT_RESET_PIN_HISTORY: ret = 0; break; case PMBUS_VIRT_SAMPLES: ret = pmbus_read_byte_data(client, 0, LM25066_SAMPLES_FOR_AVG); if (ret < 0) break; ret = 1 << ret; break; default: ret = -ENODATA; break; } return ret; } static int lm25056_read_word_data(struct i2c_client *client, int page, int phase, int reg) { int ret; switch (reg) { case PMBUS_VIRT_VMON_UV_WARN_LIMIT: ret = pmbus_read_word_data(client, 0, 0xff, LM25056_VAUX_UV_WARN_LIMIT); if (ret < 0) break; /* Adjust returned value to match VIN coefficients */ ret = DIV_ROUND_CLOSEST(ret * 293, 6140); break; case PMBUS_VIRT_VMON_OV_WARN_LIMIT: ret = pmbus_read_word_data(client, 0, 0xff, LM25056_VAUX_OV_WARN_LIMIT); if (ret < 0) break; /* Adjust returned value to match VIN coefficients */ ret = DIV_ROUND_CLOSEST(ret * 293, 6140); break; default: ret = lm25066_read_word_data(client, page, phase, reg); break; } return ret; } static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg) { int ret, s; switch (reg) { case PMBUS_VIRT_STATUS_VMON: ret = pmbus_read_byte_data(client, 0, PMBUS_STATUS_MFR_SPECIFIC); if (ret < 0) break; s = 0; if (ret & LM25056_MFR_STS_VAUX_UV_WARN) s |= PB_VOLTAGE_UV_WARNING; if (ret & LM25056_MFR_STS_VAUX_OV_WARN) s |= PB_VOLTAGE_OV_WARNING; ret = s; break; default: ret = -ENODATA; break; } return ret; } static int lm25066_write_word_data(struct i2c_client *client, int page, int reg, u16 word) { const struct pmbus_driver_info *info = pmbus_get_driver_info(client); const struct lm25066_data *data = to_lm25066_data(info); int ret; switch (reg) { case PMBUS_POUT_OP_FAULT_LIMIT: case PMBUS_POUT_OP_WARN_LIMIT: case PMBUS_VOUT_UV_WARN_LIMIT: case PMBUS_OT_FAULT_LIMIT: case PMBUS_OT_WARN_LIMIT: case PMBUS_IIN_OC_FAULT_LIMIT: case PMBUS_VIN_UV_WARN_LIMIT: case PMBUS_VIN_UV_FAULT_LIMIT: case PMBUS_VIN_OV_FAULT_LIMIT: case PMBUS_VIN_OV_WARN_LIMIT: word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit); ret = pmbus_write_word_data(client, 0, reg, word); break; case PMBUS_IIN_OC_WARN_LIMIT: word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit); ret = pmbus_write_word_data(client, 0, LM25066_MFR_IIN_OC_WARN_LIMIT, word); break; case PMBUS_PIN_OP_WARN_LIMIT: word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit); ret = pmbus_write_word_data(client, 0, LM25066_MFR_PIN_OP_WARN_LIMIT, word); break; case PMBUS_VIRT_VMON_UV_WARN_LIMIT: /* Adjust from VIN coefficients (for LM25056) */ word = DIV_ROUND_CLOSEST((int)word * 6140, 293); word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit); ret = pmbus_write_word_data(client, 0, LM25056_VAUX_UV_WARN_LIMIT, word); break; case PMBUS_VIRT_VMON_OV_WARN_LIMIT: /* Adjust from VIN coefficients (for LM25056) */ word = DIV_ROUND_CLOSEST((int)word * 6140, 293); word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit); ret = pmbus_write_word_data(client, 0, LM25056_VAUX_OV_WARN_LIMIT, word); break; case PMBUS_VIRT_RESET_PIN_HISTORY: ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK); break; case PMBUS_VIRT_SAMPLES: word = clamp_val(word, 1, LM25066_SAMPLES_FOR_AVG_MAX); ret = pmbus_write_byte_data(client, 0, LM25066_SAMPLES_FOR_AVG, ilog2(word)); break; default: ret = -ENODATA; break; } return ret; } static int lm25066_probe(struct i2c_client *client) { int config; struct lm25066_data *data; struct pmbus_driver_info *info; struct __coeff *coeff; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) return -ENODEV; data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data), GFP_KERNEL); if (!data) return -ENOMEM; config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP); if (config < 0) return config; data->id = i2c_match_id(lm25066_id, client)->driver_data; info = &data->info; info->pages = 1; info->format[PSC_VOLTAGE_IN] = direct; info->format[PSC_VOLTAGE_OUT] = direct; info->format[PSC_CURRENT_IN] = direct; info->format[PSC_TEMPERATURE] = direct; info->format[PSC_POWER] = direct; info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_SAMPLES; if (data->id == lm25056) { info->func[0] |= PMBUS_HAVE_STATUS_VMON; info->read_word_data = lm25056_read_word_data; info->read_byte_data = lm25056_read_byte_data; data->rlimit = 0x0fff; } else { info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; info->read_word_data = lm25066_read_word_data; data->rlimit = 0x0fff; } info->write_word_data = lm25066_write_word_data; coeff = &lm25066_coeff[data->id][0]; info->m[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].m; info->b[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].b; info->R[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].R; info->m[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].m; info->b[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].b; info->R[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].R; info->m[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].m; info->b[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].b; info->R[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].R; info->R[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].R; info->R[PSC_POWER] = coeff[PSC_POWER].R; if (config & LM25066_DEV_SETUP_CL) { info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].m; info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].b; info->m[PSC_POWER] = coeff[PSC_POWER_L].m; info->b[PSC_POWER] = coeff[PSC_POWER_L].b; } else { info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].m; info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].b; info->m[PSC_POWER] = coeff[PSC_POWER].m; info->b[PSC_POWER] = coeff[PSC_POWER].b; } return pmbus_do_probe(client, info); } static const struct i2c_device_id lm25066_id[] = { {"lm25056", lm25056}, {"lm25066", lm25066}, {"lm5064", lm5064}, {"lm5066", lm5066}, {"lm5066i", lm5066i}, { } }; MODULE_DEVICE_TABLE(i2c, lm25066_id); /* This is the driver that will be inserted */ static struct i2c_driver lm25066_driver = { .driver = { .name = "lm25066", }, .probe_new = lm25066_probe, .id_table = lm25066_id, }; module_i2c_driver(lm25066_driver); MODULE_AUTHOR("Guenter Roeck"); MODULE_DESCRIPTION("PMBus driver for LM25066 and compatible chips"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS(PMBUS);