129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
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/*
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* Hardware monitoring driver for Delta DPS200
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*
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* (C) Copyright 2019, Celestica Inc.
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* Author: Pradchaya Phucharoen <pphuchar@celestica.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include <linux/i2c/pmbus.h>
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#include "pmbus.h"
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static int dps200_read_word_data(struct i2c_client *client, int page, int reg)
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{
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if (reg >= PMBUS_VIRT_BASE ||
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reg == PMBUS_VOUT_OV_FAULT_LIMIT ||
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reg == PMBUS_VOUT_OV_WARN_LIMIT ||
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reg == PMBUS_VOUT_UV_WARN_LIMIT ||
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reg == PMBUS_VOUT_UV_FAULT_LIMIT ||
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reg == PMBUS_IOUT_OC_LV_FAULT_LIMIT ||
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reg == PMBUS_IOUT_UC_FAULT_LIMIT ||
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reg == PMBUS_UT_WARN_LIMIT ||
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reg == PMBUS_UT_FAULT_LIMIT ||
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reg == PMBUS_VIN_OV_FAULT_LIMIT ||
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reg == PMBUS_VIN_OV_WARN_LIMIT ||
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reg == PMBUS_IIN_OC_FAULT_LIMIT ||
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reg == PMBUS_POUT_MAX)
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return -ENXIO;
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/*
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* WARNING: The following feild have coinstant driver value.
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* If the register are
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* PMBUS_IOUT_OC_WARN_LIMIT or PMBUS_IOUT_OC_FAULT_LIMIT convert
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* the constant value from linear to direct fomat.
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*/
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if (reg == PMBUS_IOUT_OC_WARN_LIMIT)
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return 0xb4;
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else if (reg == PMBUS_IOUT_OC_FAULT_LIMIT)
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return 0xc8;
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else
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return pmbus_read_word_data(client, page, reg);
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}
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/*
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* Form DPS-200 datasheet the supported sensors format defined as:
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* VOUT: direct mode with one decimal place.
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*
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* Other sensors:
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* IOUT: direct mode with one decimal place.
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* IOUT Limits: linear mode, which difference from IOUT.
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* VIN, IIN, POWER, TEMP, & FAN: linear mode.
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*/
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static struct pmbus_driver_info dps200_info = {
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.pages = 1,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
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| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT
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| PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
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| PMBUS_HAVE_STATUS_INPUT,
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.format = {
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[PSC_VOLTAGE_OUT] = direct,
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[PSC_CURRENT_OUT] = direct,
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},
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.m = {
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[PSC_VOLTAGE_OUT] = 10,
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[PSC_CURRENT_OUT] = 10,
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},
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.b = {
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[PSC_VOLTAGE_OUT] = 0,
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[PSC_CURRENT_OUT] = 0,
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},
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.R = {
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[PSC_VOLTAGE_OUT] = 0,
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[PSC_CURRENT_OUT] = 0,
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},
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.read_word_data = &dps200_read_word_data,
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};
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static int pmbus_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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return pmbus_do_probe(client, id, &dps200_info);
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}
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/* user driver datat to pass the grpup */
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static const struct i2c_device_id dps200_id[] = {
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{"dps200", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, dps200_id);
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/* This is the driver that will be inserted */
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static struct i2c_driver dps200_driver = {
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.driver = {
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.name = "dps200",
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},
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.probe = pmbus_probe,
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.remove = pmbus_do_remove,
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.id_table = dps200_id,
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};
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module_i2c_driver(dps200_driver);
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MODULE_AUTHOR("Pradchaya Phucharoen");
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MODULE_DESCRIPTION("PMBus driver for Delta DPS200");
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MODULE_LICENSE("GPL");
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