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