5 * Ericsson BMR45X series
7 Prefixes: 'bmr450', 'bmr451', 'bmr453', 'bmr454'
10 http://archive.ericsson.net/service/internet/picov/get?DocNo=28701-EN/LZT146395
11 * ON Semiconductor ADP4000, NCP4200, NCP4208
12 Prefixes: 'adp4000', 'ncp4200', 'ncp4208'
15 http://www.onsemi.com/pub_link/Collateral/ADP4000-D.PDF
16 http://www.onsemi.com/pub_link/Collateral/NCP4200-D.PDF
17 http://www.onsemi.com/pub_link/Collateral/JUNE%202009-%20REV.%200.PDF
18 * Generic PMBus devices
23 Author: Guenter Roeck <guenter.roeck@ericsson.com>
29 This driver supports hardware montoring for various PMBus compliant devices.
30 It supports voltage, current, power, and temperature sensors as supported
33 Each monitored channel has its own high and low limits, plus a critical
36 Fan support will be added in a later version of this driver.
42 This driver does not probe for PMBus devices, since there is no register
43 which can be safely used to identify the chip (The MFG_ID register is not
44 supported by all chips), and since there is no well defined address range for
45 PMBus devices. You will have to instantiate the devices explicitly.
47 Example: the following will load the driver for an LTC2978 at address 0x60
50 $ echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
56 Support for additional PMBus chips can be added by defining chip parameters in
57 a new chip specific driver file. For example, (untested) code to add support for
58 Emerson DS1200 power modules might look as follows.
60 static struct pmbus_driver_info ds1200_info = {
62 /* Note: All other sensors are in linear mode */
63 .direct[PSC_VOLTAGE_OUT] = true,
64 .direct[PSC_TEMPERATURE] = true,
65 .direct[PSC_CURRENT_OUT] = true,
66 .m[PSC_VOLTAGE_IN] = 1,
67 .b[PSC_VOLTAGE_IN] = 0,
68 .R[PSC_VOLTAGE_IN] = 3,
69 .m[PSC_VOLTAGE_OUT] = 1,
70 .b[PSC_VOLTAGE_OUT] = 0,
71 .R[PSC_VOLTAGE_OUT] = 3,
72 .m[PSC_TEMPERATURE] = 1,
73 .b[PSC_TEMPERATURE] = 0,
74 .R[PSC_TEMPERATURE] = 3,
75 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
76 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
77 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
78 | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT
79 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
80 | PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
83 static int ds1200_probe(struct i2c_client *client,
84 const struct i2c_device_id *id)
86 return pmbus_do_probe(client, id, &ds1200_info);
89 static int ds1200_remove(struct i2c_client *client)
91 return pmbus_do_remove(client);
94 static const struct i2c_device_id ds1200_id[] = {
99 MODULE_DEVICE_TABLE(i2c, ds1200_id);
101 /* This is the driver that will be inserted */
102 static struct i2c_driver ds1200_driver = {
106 .probe = ds1200_probe,
107 .remove = ds1200_remove,
108 .id_table = ds1200_id,
111 static int __init ds1200_init(void)
113 return i2c_add_driver(&ds1200_driver);
116 static void __exit ds1200_exit(void)
118 i2c_del_driver(&ds1200_driver);
125 When probing the chip, the driver identifies which PMBus registers are
126 supported, and determines available sensors from this information.
127 Attribute files only exist if respective sensors are suported by the chip.
128 Labels are provided to inform the user about the sensor associated with
131 The following attributes are supported. Limits are read-write; all other
132 attributes are read-only.
134 inX_input Measured voltage. From READ_VIN or READ_VOUT register.
135 inX_min Minimum Voltage.
136 From VIN_UV_WARN_LIMIT or VOUT_UV_WARN_LIMIT register.
137 inX_max Maximum voltage.
138 From VIN_OV_WARN_LIMIT or VOUT_OV_WARN_LIMIT register.
139 inX_lcrit Critical minimum Voltage.
140 From VIN_UV_FAULT_LIMIT or VOUT_UV_FAULT_LIMIT register.
141 inX_crit Critical maximum voltage.
142 From VIN_OV_FAULT_LIMIT or VOUT_OV_FAULT_LIMIT register.
143 inX_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
144 inX_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
145 inX_lcrit_alarm Voltage critical low alarm.
146 From VOLTAGE_UV_FAULT status.
147 inX_crit_alarm Voltage critical high alarm.
148 From VOLTAGE_OV_FAULT status.
149 inX_label "vin", "vcap", or "voutY"
151 currX_input Measured current. From READ_IIN or READ_IOUT register.
152 currX_max Maximum current.
153 From IIN_OC_WARN_LIMIT or IOUT_OC_WARN_LIMIT register.
154 currX_lcrit Critical minimum output current.
155 From IOUT_UC_FAULT_LIMIT register.
156 currX_crit Critical maximum current.
157 From IIN_OC_FAULT_LIMIT or IOUT_OC_FAULT_LIMIT register.
158 currX_alarm Current high alarm.
159 From IIN_OC_WARNING or IOUT_OC_WARNING status.
160 currX_max_alarm Current high alarm.
161 From IIN_OC_WARN_LIMIT or IOUT_OC_WARN_LIMIT status.
162 currX_lcrit_alarm Output current critical low alarm.
163 From IOUT_UC_FAULT status.
164 currX_crit_alarm Current critical high alarm.
165 From IIN_OC_FAULT or IOUT_OC_FAULT status.
166 currX_label "iin" or "ioutY"
168 powerX_input Measured power. From READ_PIN or READ_POUT register.
169 powerX_cap Output power cap. From POUT_MAX register.
170 powerX_max Power limit. From PIN_OP_WARN_LIMIT or
171 POUT_OP_WARN_LIMIT register.
172 powerX_crit Critical output power limit.
173 From POUT_OP_FAULT_LIMIT register.
174 powerX_alarm Power high alarm.
175 From PIN_OP_WARNING or POUT_OP_WARNING status.
176 powerX_crit_alarm Output power critical high alarm.
177 From POUT_OP_FAULT status.
178 powerX_label "pin" or "poutY"
180 tempX_input Measured temperature.
181 From READ_TEMPERATURE_X register.
182 tempX_min Mimimum temperature. From UT_WARN_LIMIT register.
183 tempX_max Maximum temperature. From OT_WARN_LIMIT register.
184 tempX_lcrit Critical low temperature.
185 From UT_FAULT_LIMIT register.
186 tempX_crit Critical high temperature.
187 From OT_FAULT_LIMIT register.
188 tempX_min_alarm Chip temperature low alarm. Set by comparing
189 READ_TEMPERATURE_X with UT_WARN_LIMIT if
190 TEMP_UT_WARNING status is set.
191 tempX_max_alarm Chip temperature high alarm. Set by comparing
192 READ_TEMPERATURE_X with OT_WARN_LIMIT if
193 TEMP_OT_WARNING status is set.
194 tempX_lcrit_alarm Chip temperature critical low alarm. Set by comparing
195 READ_TEMPERATURE_X with UT_FAULT_LIMIT if
196 TEMP_UT_FAULT status is set.
197 tempX_crit_alarm Chip temperature critical high alarm. Set by comparing
198 READ_TEMPERATURE_X with OT_FAULT_LIMIT if
199 TEMP_OT_FAULT status is set.