1 Kernel driver pmbus
2 ===================
3
4 Supported chips:
5
6 * Flex BMR310, BMR453, BMR454, BMR456, BMR45
7 BMR490, BMR491, BMR492
8
9 Prefixes: 'bmr310', 'bmr453', 'bmr454', 'b
10 'bmr490', 'bmr491', 'bmr492'
11
12 Addresses scanned: -
13
14 Datasheets:
15
16 https://flexpowermodules.com/products
17
18
19 * ON Semiconductor ADP4000, NCP4200, NCP4208
20
21 Prefixes: 'adp4000', 'ncp4200', 'ncp4208'
22
23 Addresses scanned: -
24
25 Datasheets:
26
27 https://www.onsemi.com/pub_link/Collat
28
29 https://www.onsemi.com/pub_link/Collat
30
31 https://www.onsemi.com/pub_link/Collat
32
33 * Lineage Power
34
35 Prefixes: 'mdt040', 'pdt003', 'pdt006', 'p
36
37 Addresses scanned: -
38
39 Datasheets:
40
41 http://www.lineagepower.com/oem/pdf/PD
42
43 http://www.lineagepower.com/oem/pdf/PD
44
45 http://www.lineagepower.com/oem/pdf/PD
46
47 http://www.lineagepower.com/oem/pdf/UD
48
49 http://www.lineagepower.com/oem/pdf/MD
50
51 * Texas Instruments TPS40400, TPS544B20, TPS
52
53 Prefixes: 'tps40400', 'tps544b20', 'tps544
54
55 Addresses scanned: -
56
57 Datasheets:
58
59 https://www.ti.com/lit/gpn/tps40400
60
61 https://www.ti.com/lit/gpn/tps544b20
62
63 https://www.ti.com/lit/gpn/tps544b25
64
65 https://www.ti.com/lit/gpn/tps544c20
66
67 https://www.ti.com/lit/gpn/tps544c25
68
69 * Maxim MAX20796
70
71 Prefix: 'max20796'
72
73 Addresses scanned: -
74
75 Datasheet:
76
77 Not published
78
79 * Generic PMBus devices
80
81 Prefix: 'pmbus'
82
83 Addresses scanned: -
84
85 Datasheet: n.a.
86
87
88 Author: Guenter Roeck <linux@roeck-us.net>
89
90
91 Description
92 -----------
93
94 This driver supports hardware monitoring for v
95 It supports voltage, current, power, and tempe
96 by the device.
97
98 Each monitored channel has its own high and lo
99 limit.
100
101 Fan support will be added in a later version o
102
103
104 Usage Notes
105 -----------
106
107 This driver does not probe for PMBus devices,
108 which can be safely used to identify the chip
109 supported by all chips), and since there is no
110 PMBus devices. You will have to instantiate th
111
112 Example: the following will load the driver fo
113 on I2C bus #1::
114
115 $ modprobe pmbus
116 $ echo ltc2978 0x60 > /sys/bus/i2c/dev
117
118
119 Platform data support
120 ---------------------
121
122 Support for additional PMBus chips can be adde
123 a new chip specific driver file. For example,
124 Emerson DS1200 power modules might look as fol
125
126 static struct pmbus_driver_info ds1200_info
127 .pages = 1,
128 /* Note: All other sensors are in line
129 .direct[PSC_VOLTAGE_OUT] = true,
130 .direct[PSC_TEMPERATURE] = true,
131 .direct[PSC_CURRENT_OUT] = true,
132 .m[PSC_VOLTAGE_IN] = 1,
133 .b[PSC_VOLTAGE_IN] = 0,
134 .R[PSC_VOLTAGE_IN] = 3,
135 .m[PSC_VOLTAGE_OUT] = 1,
136 .b[PSC_VOLTAGE_OUT] = 0,
137 .R[PSC_VOLTAGE_OUT] = 3,
138 .m[PSC_TEMPERATURE] = 1,
139 .b[PSC_TEMPERATURE] = 0,
140 .R[PSC_TEMPERATURE] = 3,
141 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE
142 | PMBUS_HAVE_VOUT | PMBUS_H
143 | PMBUS_HAVE_IOUT | PMBUS_H
144 | PMBUS_HAVE_PIN | PMBUS_HA
145 | PMBUS_HAVE_TEMP | PMBUS_H
146 | PMBUS_HAVE_FAN12 | PMBUS_
147 };
148
149 static int ds1200_probe(struct i2c_client *c
150 {
151 return pmbus_do_probe(client, &ds1200_
152 }
153
154 static const struct i2c_device_id ds1200_id[
155 {"ds1200"},
156 {}
157 };
158
159 MODULE_DEVICE_TABLE(i2c, ds1200_id);
160
161 /* This is the driver that will be inserted
162 static struct i2c_driver ds1200_driver = {
163 .driver = {
164 .name = "ds1200",
165 },
166 .probe = ds1200_probe,
167 .id_table = ds1200_id,
168 };
169
170 static int __init ds1200_init(void)
171 {
172 return i2c_add_driver(&ds1200_driver);
173 }
174
175 static void __exit ds1200_exit(void)
176 {
177 i2c_del_driver(&ds1200_driver);
178 }
179
180
181 Sysfs entries
182 -------------
183
184 When probing the chip, the driver identifies w
185 supported, and determines available sensors fr
186 Attribute files only exist if respective senso
187 Labels are provided to inform the user about t
188 a given sysfs entry.
189
190 The following attributes are supported. Limits
191 attributes are read-only.
192
193 ======================= ======================
194 inX_input Measured voltage. From
195 inX_min Minimum Voltage.
196 From VIN_UV_WARN_LIMIT
197 inX_max Maximum voltage.
198 From VIN_OV_WARN_LIMIT
199 inX_lcrit Critical minimum Volta
200 From VIN_UV_FAULT_LIMI
201 inX_crit Critical maximum volta
202 From VIN_OV_FAULT_LIMI
203 inX_min_alarm Voltage low alarm. Fro
204 inX_max_alarm Voltage high alarm. Fr
205 inX_lcrit_alarm Voltage critical low a
206 From VOLTAGE_UV_FAULT
207 inX_crit_alarm Voltage critical high
208 From VOLTAGE_OV_FAULT
209 inX_label "vin", "vcap", or "vou
210 inX_rated_min Minimum rated voltage.
211 From MFR_VIN_MIN or MF
212 inX_rated_max Maximum rated voltage.
213 From MFR_VIN_MAX or MF
214
215 currX_input Measured current. From
216 currX_max Maximum current.
217 From IIN_OC_WARN_LIMIT
218 currX_lcrit Critical minimum outpu
219 From IOUT_UC_FAULT_LIM
220 currX_crit Critical maximum curre
221 From IIN_OC_FAULT_LIMI
222 currX_alarm Current high alarm.
223 From IIN_OC_WARNING or
224 currX_max_alarm Current high alarm.
225 From IIN_OC_WARN_LIMIT
226 currX_lcrit_alarm Output current critica
227 From IOUT_UC_FAULT sta
228 currX_crit_alarm Current critical high
229 From IIN_OC_FAULT or I
230 currX_label "iin", "iinY", "iinY.Z
231 where Y reflects the p
232 phase.
233 currX_rated_max Maximum rated current.
234 From MFR_IIN_MAX or MF
235
236 powerX_input Measured power. From R
237 powerX_cap Output power cap. From
238 powerX_max Power limit. From PIN_
239 POUT_OP_WARN_LIMIT reg
240 powerX_crit Critical output power
241 From POUT_OP_FAULT_LIM
242 powerX_alarm Power high alarm.
243 From PIN_OP_WARNING or
244 powerX_crit_alarm Output power critical
245 From POUT_OP_FAULT sta
246 powerX_label "pin", "pinY", "pinY.Z
247 where Y reflects the p
248 phase.
249 powerX_rated_max Maximum rated power.
250 From MFR_PIN_MAX or MF
251
252 tempX_input Measured temperature.
253 From READ_TEMPERATURE_
254 tempX_min Minimum temperature. F
255 tempX_max Maximum temperature. F
256 tempX_lcrit Critical low temperatu
257 From UT_FAULT_LIMIT re
258 tempX_crit Critical high temperat
259 From OT_FAULT_LIMIT re
260 tempX_min_alarm Chip temperature low a
261 READ_TEMPERATURE_X wit
262 TEMP_UT_WARNING status
263 tempX_max_alarm Chip temperature high
264 READ_TEMPERATURE_X wit
265 TEMP_OT_WARNING status
266 tempX_lcrit_alarm Chip temperature criti
267 READ_TEMPERATURE_X wit
268 TEMP_UT_FAULT status i
269 tempX_crit_alarm Chip temperature criti
270 READ_TEMPERATURE_X wit
271 TEMP_OT_FAULT status i
272 tempX_rated_min Minimum rated temperat
273 From MFR_TAMBIENT_MIN
274 tempX_rated_max Maximum rated temperat
275 From MFR_TAMBIENT_MAX,
276 MFR_MAX_TEMP_3 registe
277 ======================= ======================
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