1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Hardware monitoring driver for Infineon Multi-phase Digital VR Controllers
5 * Copyright (c) 2020 Mellanox Technologies. All rights reserved.
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/regulator/driver.h>
17 #define XDPE122_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */
18 #define XDPE122_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */
19 #define XDPE122_PROT_IMVP9_10MV 0x03 /* IMVP9 mode, 10-mV DAC */
20 #define XDPE122_AMD_625MV 0x10 /* AMD mode 6.25mV */
21 #define XDPE122_PAGE_NUM 2
23 static int xdpe122_read_word_data(struct i2c_client *client, int page,
26 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
33 case PMBUS_VOUT_OV_FAULT_LIMIT:
34 case PMBUS_VOUT_UV_FAULT_LIMIT:
35 ret = pmbus_read_word_data(client, page, phase, reg);
39 /* Convert register value to LINEAR11 data. */
40 exponent = ((s16)ret) >> 11;
41 mantissa = ((s16)((ret & GENMASK(10, 0)) << 5)) >> 5;
42 val = mantissa * 1000L;
48 /* Convert data to VID register. */
49 switch (info->vrm_version[page]) {
52 return 1 + DIV_ROUND_CLOSEST(val - 500, 10);
56 return 1 + DIV_ROUND_CLOSEST(val - 250, 5);
60 return 1 + DIV_ROUND_CLOSEST(val - 200, 10);
63 if (val >= 200 && val <= 1550)
64 return DIV_ROUND_CLOSEST((1550 - val) * 100,
77 static int xdpe122_identify(struct i2c_client *client,
78 struct pmbus_driver_info *info)
81 int i, ret, vout_mode;
83 vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
84 if (vout_mode >= 0 && vout_mode != 0xff) {
85 switch (vout_mode >> 5) {
87 info->format[PSC_VOLTAGE_OUT] = linear;
90 info->format[PSC_VOLTAGE_OUT] = vid;
91 info->read_word_data = xdpe122_read_word_data;
98 for (i = 0; i < XDPE122_PAGE_NUM; i++) {
99 /* Read the register with VOUT scaling value.*/
100 ret = pmbus_read_byte_data(client, i, PMBUS_VOUT_MODE);
104 vout_params = ret & GENMASK(4, 0);
106 switch (vout_params) {
107 case XDPE122_PROT_VR12_5_10MV:
108 info->vrm_version[i] = vr13;
110 case XDPE122_PROT_VR12_5MV:
111 info->vrm_version[i] = vr12;
113 case XDPE122_PROT_IMVP9_10MV:
114 info->vrm_version[i] = imvp9;
116 case XDPE122_AMD_625MV:
117 info->vrm_version[i] = amd625mv;
127 static const struct regulator_desc __maybe_unused xdpe122_reg_desc[] = {
128 PMBUS_REGULATOR("vout", 0),
129 PMBUS_REGULATOR("vout", 1),
132 static struct pmbus_driver_info xdpe122_info = {
133 .pages = XDPE122_PAGE_NUM,
134 .format[PSC_VOLTAGE_IN] = linear,
135 .format[PSC_TEMPERATURE] = linear,
136 .format[PSC_CURRENT_IN] = linear,
137 .format[PSC_CURRENT_OUT] = linear,
138 .format[PSC_POWER] = linear,
139 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
140 PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
141 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
142 PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT,
143 .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
144 PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
145 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
146 PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT,
147 .identify = xdpe122_identify,
148 #if IS_ENABLED(CONFIG_SENSORS_XDPE122_REGULATOR)
150 .reg_desc = xdpe122_reg_desc,
154 static int xdpe122_probe(struct i2c_client *client)
156 struct pmbus_driver_info *info;
158 info = devm_kmemdup(&client->dev, &xdpe122_info, sizeof(*info),
163 return pmbus_do_probe(client, info);
166 static const struct i2c_device_id xdpe122_id[] = {
173 MODULE_DEVICE_TABLE(i2c, xdpe122_id);
175 static const struct of_device_id __maybe_unused xdpe122_of_match[] = {
176 {.compatible = "infineon,xdpe11280"},
177 {.compatible = "infineon,xdpe12254"},
178 {.compatible = "infineon,xdpe12284"},
181 MODULE_DEVICE_TABLE(of, xdpe122_of_match);
183 static struct i2c_driver xdpe122_driver = {
186 .of_match_table = of_match_ptr(xdpe122_of_match),
188 .probe_new = xdpe122_probe,
189 .id_table = xdpe122_id,
192 module_i2c_driver(xdpe122_driver);
194 MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
195 MODULE_DESCRIPTION("PMBus driver for Infineon XDPE122 family");
196 MODULE_LICENSE("GPL");
197 MODULE_IMPORT_NS(PMBUS);