120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Hardware monitoring driver for Infineon Multi-phase Digital XDPE1A2G5B
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* and XDPE1A2G7B Controllers
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*
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* Copyright (c) 2026 Infineon 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 XDPE1A2G7B_PAGE_NUM 2
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#define XDPE1A2G7B_NVIDIA_195MV 0x1E /* NVIDIA mode 1.95mV, VID step is 5mV */
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static int xdpe1a2g7b_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 vout_mode;
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/*
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* XDPE1A2G5B and XDPE1A2G7B support both Linear and NVIDIA PWM VID data
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* formats via VOUT_MODE. Note that the device pages/loops are not fully
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* independent: configuration is shared, so programming each page/loop
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* separately is not supported.
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*/
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vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
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if (vout_mode < 0)
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return vout_mode;
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switch (vout_mode >> 5) {
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case 0:
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info->format[PSC_VOLTAGE_OUT] = linear;
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return 0;
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case 1:
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info->format[PSC_VOLTAGE_OUT] = vid;
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vout_params = vout_mode & GENMASK(4, 0);
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/* Check for VID Code Type */
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switch (vout_params) {
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case XDPE1A2G7B_NVIDIA_195MV:
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/* VID vrm_version for PAGE0 and PAGE1 */
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info->vrm_version[0] = nvidia195mv;
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info->vrm_version[1] = nvidia195mv;
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break;
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default:
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return -EINVAL;
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}
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break;
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default:
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return -ENODEV;
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}
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return 0;
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}
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static struct pmbus_driver_info xdpe1a2g7b_info = {
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.pages = XDPE1A2G7B_PAGE_NUM,
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.identify = xdpe1a2g7b_identify,
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.format[PSC_VOLTAGE_IN] = linear,
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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_TEMP2 | 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_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_STATUS_INPUT,
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};
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static int xdpe1a2g7b_probe(struct i2c_client *client)
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{
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struct pmbus_driver_info *info;
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info = devm_kmemdup(&client->dev, &xdpe1a2g7b_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, info);
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}
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static const struct i2c_device_id xdpe1a2g7b_id[] = {
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{ .name = "xdpe1a2g5b" },
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{ .name = "xdpe1a2g7b" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, xdpe1a2g7b_id);
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static const struct of_device_id __maybe_unused xdpe1a2g7b_of_match[] = {
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{ .compatible = "infineon,xdpe1a2g5b" },
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{ .compatible = "infineon,xdpe1a2g7b" },
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{}
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};
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MODULE_DEVICE_TABLE(of, xdpe1a2g7b_of_match);
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static struct i2c_driver xdpe1a2g7b_driver = {
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.driver = {
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.name = "xdpe1a2g7b",
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.of_match_table = of_match_ptr(xdpe1a2g7b_of_match),
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},
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.probe = xdpe1a2g7b_probe,
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.id_table = xdpe1a2g7b_id,
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};
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module_i2c_driver(xdpe1a2g7b_driver);
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MODULE_AUTHOR("Ashish Yadav <ashish.yadav@infineon.com>");
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MODULE_DESCRIPTION("PMBus driver for Infineon XDPE1A2G5B/7B");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("PMBUS");
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