| /* |
| * Hardware monitoring driver for Maxim MAX34440/MAX34441 |
| * |
| * 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/i2c.h> |
| #include "pmbus.h" |
| |
| enum chips { max34440, max34441 }; |
| |
| #define MAX34440_STATUS_OC_WARN (1 << 0) |
| #define MAX34440_STATUS_OC_FAULT (1 << 1) |
| #define MAX34440_STATUS_OT_FAULT (1 << 5) |
| #define MAX34440_STATUS_OT_WARN (1 << 6) |
| |
| static int max34440_read_byte_data(struct i2c_client *client, int page, int reg) |
| { |
| int ret; |
| int mfg_status; |
| |
| ret = pmbus_set_page(client, page); |
| if (ret < 0) |
| return ret; |
| |
| switch (reg) { |
| case PMBUS_STATUS_IOUT: |
| mfg_status = pmbus_read_word_data(client, 0, |
| PMBUS_STATUS_MFR_SPECIFIC); |
| if (mfg_status < 0) |
| return mfg_status; |
| if (mfg_status & MAX34440_STATUS_OC_WARN) |
| ret |= PB_IOUT_OC_WARNING; |
| if (mfg_status & MAX34440_STATUS_OC_FAULT) |
| ret |= PB_IOUT_OC_FAULT; |
| break; |
| case PMBUS_STATUS_TEMPERATURE: |
| mfg_status = pmbus_read_word_data(client, 0, |
| PMBUS_STATUS_MFR_SPECIFIC); |
| if (mfg_status < 0) |
| return mfg_status; |
| if (mfg_status & MAX34440_STATUS_OT_WARN) |
| ret |= PB_TEMP_OT_WARNING; |
| if (mfg_status & MAX34440_STATUS_OT_FAULT) |
| ret |= PB_TEMP_OT_FAULT; |
| break; |
| default: |
| ret = -ENODATA; |
| break; |
| } |
| return ret; |
| } |
| |
| static struct pmbus_driver_info max34440_info[] = { |
| [max34440] = { |
| .pages = 14, |
| .format[PSC_VOLTAGE_IN] = direct, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .format[PSC_CURRENT_OUT] = direct, |
| .m[PSC_VOLTAGE_IN] = 1, |
| .b[PSC_VOLTAGE_IN] = 0, |
| .R[PSC_VOLTAGE_IN] = 3, /* R = 0 in datasheet reflects mV */ |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, /* R = 0 in datasheet reflects mV */ |
| .m[PSC_CURRENT_OUT] = 1, |
| .b[PSC_CURRENT_OUT] = 0, |
| .R[PSC_CURRENT_OUT] = 3, /* R = 0 in datasheet reflects mA */ |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| }, |
| [max34441] = { |
| .pages = 12, |
| .format[PSC_VOLTAGE_IN] = direct, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .format[PSC_CURRENT_OUT] = direct, |
| .format[PSC_FAN] = direct, |
| .m[PSC_VOLTAGE_IN] = 1, |
| .b[PSC_VOLTAGE_IN] = 0, |
| .R[PSC_VOLTAGE_IN] = 3, |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, |
| .m[PSC_CURRENT_OUT] = 1, |
| .b[PSC_CURRENT_OUT] = 0, |
| .R[PSC_CURRENT_OUT] = 3, |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .m[PSC_FAN] = 1, |
| .b[PSC_FAN] = 0, |
| .R[PSC_FAN] = 0, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12, |
| .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| }, |
| }; |
| |
| static int max34440_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| return pmbus_do_probe(client, id, &max34440_info[id->driver_data]); |
| } |
| |
| static int max34440_remove(struct i2c_client *client) |
| { |
| return pmbus_do_remove(client); |
| } |
| |
| static const struct i2c_device_id max34440_id[] = { |
| {"max34440", max34440}, |
| {"max34441", max34441}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(i2c, max34440_id); |
| |
| /* This is the driver that will be inserted */ |
| static struct i2c_driver max34440_driver = { |
| .driver = { |
| .name = "max34440", |
| }, |
| .probe = max34440_probe, |
| .remove = max34440_remove, |
| .id_table = max34440_id, |
| }; |
| |
| static int __init max34440_init(void) |
| { |
| return i2c_add_driver(&max34440_driver); |
| } |
| |
| static void __exit max34440_exit(void) |
| { |
| i2c_del_driver(&max34440_driver); |
| } |
| |
| MODULE_AUTHOR("Guenter Roeck"); |
| MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441"); |
| MODULE_LICENSE("GPL"); |
| module_init(max34440_init); |
| module_exit(max34440_exit); |