diff options
Diffstat (limited to 'drivers/hwmon/pmbus/lm25066.c')
| -rw-r--r-- | drivers/hwmon/pmbus/lm25066.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c new file mode 100644 index 000000000000..d4bc114572de --- /dev/null +++ b/drivers/hwmon/pmbus/lm25066.c @@ -0,0 +1,340 @@ +/* + * Hardware monitoring driver for LM25066 / LM5064 / LM5066 + * + * Copyright (c) 2011 Ericsson AB. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#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 "pmbus.h" + +enum chips { lm25066, lm5064, lm5066 }; + +#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_READ_AVG_VOUT 0xdd +#define LM25066_READ_AVG_IIN 0xde +#define LM25066_READ_AVG_PIN 0xdf + +#define LM25066_DEV_SETUP_CL (1 << 4) /* Current limit */ + +struct lm25066_data { + int id; + 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 reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + const struct lm25066_data *data = to_lm25066_data(info); + int ret; + + if (page > 1) + return -EINVAL; + + /* Map READ_VAUX into READ_VOUT register on page 1 */ + if (page == 1) { + switch (reg) { + case PMBUS_READ_VOUT: + ret = pmbus_read_word_data(client, 0, + LM25066_READ_VAUX); + if (ret < 0) + break; + /* Adjust returned value to match VOUT coefficients */ + switch (data->id) { + case lm25066: + /* VOUT: 4.54 mV VAUX: 283.2 uV LSB */ + ret = DIV_ROUND_CLOSEST(ret * 2832, 45400); + break; + case lm5064: + /* VOUT: 4.53 mV VAUX: 700 uV LSB */ + ret = DIV_ROUND_CLOSEST(ret * 70, 453); + break; + case lm5066: + /* VOUT: 2.18 mV VAUX: 725 uV LSB */ + ret = DIV_ROUND_CLOSEST(ret * 725, 2180); + break; + } + break; + default: + /* No other valid registers on page 1 */ + ret = -EINVAL; + break; + } + goto done; + } + + switch (reg) { + case PMBUS_READ_IIN: + ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN); + break; + case PMBUS_READ_PIN: + ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, + LM25066_MFR_IIN_OC_WARN_LIMIT); + break; + case PMBUS_PIN_OP_WARN_LIMIT: + ret = pmbus_read_word_data(client, 0, + LM25066_MFR_PIN_OP_WARN_LIMIT); + break; + case PMBUS_VIRT_READ_VIN_AVG: + ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN); + break; + case PMBUS_VIRT_READ_VOUT_AVG: + ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT); + break; + case PMBUS_VIRT_READ_IIN_AVG: + ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN); + break; + case PMBUS_VIRT_READ_PIN_AVG: + ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN); + break; + case PMBUS_VIRT_READ_PIN_MAX: + ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK); + break; + case PMBUS_VIRT_RESET_PIN_HISTORY: + ret = 0; + break; + default: + ret = -ENODATA; + break; + } +done: + return ret; +} + +static int lm25066_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + int ret; + + if (page > 1) + return -EINVAL; + + switch (reg) { + case PMBUS_IIN_OC_WARN_LIMIT: + ret = pmbus_write_word_data(client, 0, + LM25066_MFR_IIN_OC_WARN_LIMIT, + word); + break; + case PMBUS_PIN_OP_WARN_LIMIT: + ret = pmbus_write_word_data(client, 0, + LM25066_MFR_PIN_OP_WARN_LIMIT, + word); + break; + case PMBUS_VIRT_RESET_PIN_HISTORY: + ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK); + break; + default: + ret = -ENODATA; + break; + } + return ret; +} + +static int lm25066_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int config; + int ret; + struct lm25066_data *data; + struct pmbus_driver_info *info; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA)) + return -ENODEV; + + data = kzalloc(sizeof(struct lm25066_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP); + if (config < 0) { + ret = config; + goto err_mem; + } + + data->id = id->driver_data; + info = &data->info; + + info->pages = 2; + 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->m[PSC_TEMPERATURE] = 16; + info->b[PSC_TEMPERATURE] = 0; + info->R[PSC_TEMPERATURE] = 0; + + info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT + | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN + | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; + info->func[1] = PMBUS_HAVE_VOUT; + + info->read_word_data = lm25066_read_word_data; + info->write_word_data = lm25066_write_word_data; + + switch (id->driver_data) { + case lm25066: + info->m[PSC_VOLTAGE_IN] = 22070; + info->b[PSC_VOLTAGE_IN] = 0; + info->R[PSC_VOLTAGE_IN] = -2; + info->m[PSC_VOLTAGE_OUT] = 22070; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = -2; + + if (config & LM25066_DEV_SETUP_CL) { + info->m[PSC_CURRENT_IN] = 6852; + info->b[PSC_CURRENT_IN] = 0; + info->R[PSC_CURRENT_IN] = -2; + info->m[PSC_POWER] = 369; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -2; + } else { + info->m[PSC_CURRENT_IN] = 13661; + info->b[PSC_CURRENT_IN] = 0; + info->R[PSC_CURRENT_IN] = -2; + info->m[PSC_POWER] = 736; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -2; + } + break; + case lm5064: + info->m[PSC_VOLTAGE_IN] = 22075; + info->b[PSC_VOLTAGE_IN] = 0; + info->R[PSC_VOLTAGE_IN] = -2; + info->m[PSC_VOLTAGE_OUT] = 22075; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = -2; + + if (config & LM25066_DEV_SETUP_CL) { + info->m[PSC_CURRENT_IN] = 6713; + info->b[PSC_CURRENT_IN] = 0; + info->R[PSC_CURRENT_IN] = -2; + info->m[PSC_POWER] = 3619; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -3; + } else { + info->m[PSC_CURRENT_IN] = 13426; + info->b[PSC_CURRENT_IN] = 0; + info->R[PSC_CURRENT_IN] = -2; + info->m[PSC_POWER] = 7238; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -3; + } + break; + case lm5066: + info->m[PSC_VOLTAGE_IN] = 4587; + info->b[PSC_VOLTAGE_IN] = 0; + info->R[PSC_VOLTAGE_IN] = -2; + info->m[PSC_VOLTAGE_OUT] = 4587; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = -2; + + if (config & LM25066_DEV_SETUP_CL) { + info->m[PSC_CURRENT_IN] = 10753; + info->b[PSC_CURRENT_IN] = 0; + info->R[PSC_CURRENT_IN] = -2; + info->m[PSC_POWER] = 1204; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -3; + } else { + info->m[PSC_CURRENT_IN] = 5405; + info->b[PSC_CURRENT_IN] = 0; + info->R[PSC_CURRENT_IN] = -2; + info->m[PSC_POWER] = 605; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -3; + } + break; + default: + ret = -ENODEV; + goto err_mem; + } + + ret = pmbus_do_probe(client, id, info); + if (ret) + goto err_mem; + return 0; + +err_mem: + kfree(data); + return ret; +} + +static int lm25066_remove(struct i2c_client *client) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + const struct lm25066_data *data = to_lm25066_data(info); + int ret; + + ret = pmbus_do_remove(client); + kfree(data); + return ret; +} + +static const struct i2c_device_id lm25066_id[] = { + {"lm25066", lm25066}, + {"lm5064", lm5064}, + {"lm5066", lm5066}, + { } +}; + +MODULE_DEVICE_TABLE(i2c, lm25066_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver lm25066_driver = { + .driver = { + .name = "lm25066", + }, + .probe = lm25066_probe, + .remove = lm25066_remove, + .id_table = lm25066_id, +}; + +static int __init lm25066_init(void) +{ + return i2c_add_driver(&lm25066_driver); +} + +static void __exit lm25066_exit(void) +{ + i2c_del_driver(&lm25066_driver); +} + +MODULE_AUTHOR("Guenter Roeck"); +MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066"); +MODULE_LICENSE("GPL"); +module_init(lm25066_init); +module_exit(lm25066_exit); |