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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/hwmon/pmbus/lm25066.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hwmon/pmbus/lm25066.c')
-rw-r--r-- | drivers/hwmon/pmbus/lm25066.c | 580 |
1 files changed, 580 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c new file mode 100644 index 000000000..09792cd03 --- /dev/null +++ b/drivers/hwmon/pmbus/lm25066.c @@ -0,0 +1,580 @@ +// 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 <linux/bitops.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/log2.h> +#include <linux/of_device.h> +#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 const 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 = 6854, + .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 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; +} + +#if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR) +static const struct regulator_desc lm25066_reg_desc[] = { + PMBUS_REGULATOR("vout", 0), +}; +#endif + +static const struct i2c_device_id lm25066_id[] = { + {"lm25056", lm25056}, + {"lm25066", lm25066}, + {"lm5064", lm5064}, + {"lm5066", lm5066}, + {"lm5066i", lm5066i}, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm25066_id); + +static const struct of_device_id __maybe_unused lm25066_of_match[] = { + { .compatible = "ti,lm25056", .data = (void *)lm25056, }, + { .compatible = "ti,lm25066", .data = (void *)lm25066, }, + { .compatible = "ti,lm5064", .data = (void *)lm5064, }, + { .compatible = "ti,lm5066", .data = (void *)lm5066, }, + { .compatible = "ti,lm5066i", .data = (void *)lm5066i, }, + { }, +}; +MODULE_DEVICE_TABLE(of, lm25066_of_match); + +static int lm25066_probe(struct i2c_client *client) +{ + int config; + u32 shunt; + struct lm25066_data *data; + struct pmbus_driver_info *info; + const struct __coeff *coeff; + const struct of_device_id *of_id; + const struct i2c_device_id *i2c_id; + + 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; + + i2c_id = i2c_match_id(lm25066_id, client); + + of_id = of_match_device(lm25066_of_match, &client->dev); + if (of_id && (unsigned long)of_id->data != i2c_id->driver_data) + dev_notice(&client->dev, "Device mismatch: %s in device tree, %s detected\n", + of_id->name, i2c_id->name); + + data->id = i2c_id->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; + } + + /* + * Values in the TI datasheets are normalized for a 1mOhm sense + * resistor; assume that unless DT specifies a value explicitly. + */ + if (of_property_read_u32(client->dev.of_node, "shunt-resistor-micro-ohms", &shunt)) + shunt = 1000; + + info->m[PSC_CURRENT_IN] = info->m[PSC_CURRENT_IN] * shunt / 1000; + info->m[PSC_POWER] = info->m[PSC_POWER] * shunt / 1000; + +#if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR) + /* LM25056 doesn't support OPERATION */ + if (data->id != lm25056) { + info->num_regulators = ARRAY_SIZE(lm25066_reg_desc); + info->reg_desc = lm25066_reg_desc; + } +#endif + + return pmbus_do_probe(client, info); +} + +/* This is the driver that will be inserted */ +static struct i2c_driver lm25066_driver = { + .driver = { + .name = "lm25066", + .of_match_table = of_match_ptr(lm25066_of_match), + }, + .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); |