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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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aaafb7c8eb
Add support for devices XDPE12254, XDPE12284. All these device support two pages. The below lists of VOUT_MODE command readout with their related VID protocols, Digital to Analog Converter steps, supported by these devices: VR12.0 mode, 5-mV DAC - 0x01; VR12.5 mode, 10-mV DAC - 0x02; IMVP9 mode, 5-mV DAC - 0x03; AMD mode 6.25mV - 0x10. Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Link: https://lore.kernel.org/r/20200113150841.17670-5-vadimp@mellanox.com [groeck: Added missing break statement] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for Infineon Multi-phase Digital VR Controllers
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*
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* Copyright (c) 2020 Mellanox Technologies. All rights reserved.
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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 XDPE122_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */
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#define XDPE122_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */
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#define XDPE122_PROT_IMVP9_10MV 0x03 /* IMVP9 mode, 10-mV DAC */
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#define XDPE122_AMD_625MV 0x10 /* AMD mode 6.25mV */
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#define XDPE122_PAGE_NUM 2
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static int xdpe122_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 i, ret;
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for (i = 0; i < XDPE122_PAGE_NUM; i++) {
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/* Read the register with VOUT scaling value.*/
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ret = pmbus_read_byte_data(client, i, 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 XDPE122_PROT_VR12_5_10MV:
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info->vrm_version[i] = vr13;
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break;
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case XDPE122_PROT_VR12_5MV:
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info->vrm_version[i] = vr12;
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break;
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case XDPE122_PROT_IMVP9_10MV:
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info->vrm_version[i] = imvp9;
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break;
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case XDPE122_AMD_625MV:
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info->vrm_version[i] = amd625mv;
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break;
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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static struct pmbus_driver_info xdpe122_info = {
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.pages = XDPE122_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_IN] = 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_IIN | 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 | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT,
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.func[1] = 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_TEMP | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT,
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.identify = xdpe122_identify,
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};
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static int xdpe122_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, &xdpe122_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 xdpe122_id[] = {
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{"xdpe12254", 0},
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{"xdpe12284", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, xdpe122_id);
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static const struct of_device_id __maybe_unused xdpe122_of_match[] = {
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{.compatible = "infineon, xdpe12254"},
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{.compatible = "infineon, xdpe12284"},
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{}
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};
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MODULE_DEVICE_TABLE(of, xdpe122_of_match);
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static struct i2c_driver xdpe122_driver = {
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.driver = {
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.name = "xdpe12284",
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.of_match_table = of_match_ptr(xdpe122_of_match),
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},
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.probe = xdpe122_probe,
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.remove = pmbus_do_remove,
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.id_table = xdpe122_id,
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};
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module_i2c_driver(xdpe122_driver);
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MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
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MODULE_DESCRIPTION("PMBus driver for Infineon XDPE122 family");
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MODULE_LICENSE("GPL");
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