/* * Hardware monitoring driver for Texas Instruments TPS53679 * * Copyright (c) 2017 Mellanox Technologies. All rights reserved. * Copyright (c) 2017 Vadim Pasternak <vadimp@mellanox.com> * * 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. */ #include <linux/err.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include "pmbus.h" #define TPS53679_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */ #define TPS53679_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */ #define TPS53679_PROT_VR13_10MV 0x04 /* VR13.0 mode, 10-mV DAC */ #define TPS53679_PROT_IMVP8_5MV 0x05 /* IMVP8 mode, 5-mV DAC */ #define TPS53679_PROT_VR13_5MV 0x07 /* VR13.0 mode, 5-mV DAC */ #define TPS53679_PAGE_NUM 2 static int tps53679_identify(struct i2c_client *client, struct pmbus_driver_info *info) { u8 vout_params; int ret; /* Read the register with VOUT scaling value.*/ ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); if (ret < 0) return ret; vout_params = ret & GENMASK(4, 0); switch (vout_params) { case TPS53679_PROT_VR13_10MV: case TPS53679_PROT_VR12_5_10MV: info->vrm_version = vr13; break; case TPS53679_PROT_VR13_5MV: case TPS53679_PROT_VR12_5MV: case TPS53679_PROT_IMVP8_5MV: info->vrm_version = vr12; break; default: return -EINVAL; } return 0; } static struct pmbus_driver_info tps53679_info = { .pages = TPS53679_PAGE_NUM, .format[PSC_VOLTAGE_IN] = linear, .format[PSC_VOLTAGE_OUT] = vid, .format[PSC_TEMPERATURE] = linear, .format[PSC_CURRENT_OUT] = linear, .format[PSC_POWER] = linear, .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_POUT, .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_POUT, .identify = tps53679_identify, }; static int tps53679_probe(struct i2c_client *client, const struct i2c_device_id *id) { return pmbus_do_probe(client, id, &tps53679_info); } static const struct i2c_device_id tps53679_id[] = { {"tps53679", 0}, {} }; MODULE_DEVICE_TABLE(i2c, tps53679_id); static const struct of_device_id tps53679_of_match[] = { {.compatible = "ti,tps53679"}, {} }; MODULE_DEVICE_TABLE(of, tps53679_of_match); static struct i2c_driver tps53679_driver = { .driver = { .name = "tps53679", .of_match_table = of_match_ptr(tps53679_of_match), }, .probe = tps53679_probe, .remove = pmbus_do_remove, .id_table = tps53679_id, }; module_i2c_driver(tps53679_driver); MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>"); MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679"); MODULE_LICENSE("GPL");