| /* |
| * 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 -ENXIO; |
| |
| /* 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 = -ENXIO; |
| 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 -ENXIO; |
| |
| 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_write_byte(struct i2c_client *client, int page, u8 value) |
| { |
| if (page > 1) |
| return -ENXIO; |
| |
| if (page <= 0) |
| return pmbus_write_byte(client, page, value); |
| |
| return 0; |
| } |
| |
| static int lm25066_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| int config; |
| struct lm25066_data *data; |
| struct pmbus_driver_info *info; |
| |
| 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 = 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; |
| info->write_byte = lm25066_write_byte; |
| |
| 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: |
| return -ENODEV; |
| } |
| |
| return pmbus_do_probe(client, id, info); |
| } |
| |
| 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 = pmbus_do_remove, |
| .id_table = lm25066_id, |
| }; |
| |
| module_i2c_driver(lm25066_driver); |
| |
| MODULE_AUTHOR("Guenter Roeck"); |
| MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066"); |
| MODULE_LICENSE("GPL"); |