Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.
1 Kernel driver pmbus 2 ==================== 3 4 Supported chips: 5 * Ericsson BMR453, BMR454 6 Prefixes: 'bmr453', 'bmr454' 7 Addresses scanned: - 8 Datasheet: 9 http://archive.ericsson.net/service/internet/picov/get?DocNo=28701-EN/LZT146395 10 * ON Semiconductor ADP4000, NCP4200, NCP4208 11 Prefixes: 'adp4000', 'ncp4200', 'ncp4208' 12 Addresses scanned: - 13 Datasheets: 14 http://www.onsemi.com/pub_link/Collateral/ADP4000-D.PDF 15 http://www.onsemi.com/pub_link/Collateral/NCP4200-D.PDF 16 http://www.onsemi.com/pub_link/Collateral/JUNE%202009-%20REV.%200.PDF 17 * Lineage Power 18 Prefixes: 'mdt040', 'pdt003', 'pdt006', 'pdt012', 'udt020' 19 Addresses scanned: - 20 Datasheets: 21 http://www.lineagepower.com/oem/pdf/PDT003A0X.pdf 22 http://www.lineagepower.com/oem/pdf/PDT006A0X.pdf 23 http://www.lineagepower.com/oem/pdf/PDT012A0X.pdf 24 http://www.lineagepower.com/oem/pdf/UDT020A0X.pdf 25 http://www.lineagepower.com/oem/pdf/MDT040A0X.pdf 26 * Texas Instruments TPS40400, TPS544B20, TPS544B25, TPS544C20, TPS544C25 27 Prefixes: 'tps40400', 'tps544b20', 'tps544b25', 'tps544c20', 'tps544c25' 28 Addresses scanned: - 29 Datasheets: 30 http://www.ti.com/lit/gpn/tps40400 31 http://www.ti.com/lit/gpn/tps544b20 32 http://www.ti.com/lit/gpn/tps544b25 33 http://www.ti.com/lit/gpn/tps544c20 34 http://www.ti.com/lit/gpn/tps544c25 35 * Generic PMBus devices 36 Prefix: 'pmbus' 37 Addresses scanned: - 38 Datasheet: n.a. 39 40 Author: Guenter Roeck <linux@roeck-us.net> 41 42 43 Description 44 ----------- 45 46 This driver supports hardware monitoring for various PMBus compliant devices. 47 It supports voltage, current, power, and temperature sensors as supported 48 by the device. 49 50 Each monitored channel has its own high and low limits, plus a critical 51 limit. 52 53 Fan support will be added in a later version of this driver. 54 55 56 Usage Notes 57 ----------- 58 59 This driver does not probe for PMBus devices, since there is no register 60 which can be safely used to identify the chip (The MFG_ID register is not 61 supported by all chips), and since there is no well defined address range for 62 PMBus devices. You will have to instantiate the devices explicitly. 63 64 Example: the following will load the driver for an LTC2978 at address 0x60 65 on I2C bus #1: 66 $ modprobe pmbus 67 $ echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device 68 69 70 Platform data support 71 --------------------- 72 73 Support for additional PMBus chips can be added by defining chip parameters in 74 a new chip specific driver file. For example, (untested) code to add support for 75 Emerson DS1200 power modules might look as follows. 76 77 static struct pmbus_driver_info ds1200_info = { 78 .pages = 1, 79 /* Note: All other sensors are in linear mode */ 80 .direct[PSC_VOLTAGE_OUT] = true, 81 .direct[PSC_TEMPERATURE] = true, 82 .direct[PSC_CURRENT_OUT] = true, 83 .m[PSC_VOLTAGE_IN] = 1, 84 .b[PSC_VOLTAGE_IN] = 0, 85 .R[PSC_VOLTAGE_IN] = 3, 86 .m[PSC_VOLTAGE_OUT] = 1, 87 .b[PSC_VOLTAGE_OUT] = 0, 88 .R[PSC_VOLTAGE_OUT] = 3, 89 .m[PSC_TEMPERATURE] = 1, 90 .b[PSC_TEMPERATURE] = 0, 91 .R[PSC_TEMPERATURE] = 3, 92 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT 93 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT 94 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT 95 | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT 96 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP 97 | PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12, 98 }; 99 100 static int ds1200_probe(struct i2c_client *client, 101 const struct i2c_device_id *id) 102 { 103 return pmbus_do_probe(client, id, &ds1200_info); 104 } 105 106 static int ds1200_remove(struct i2c_client *client) 107 { 108 return pmbus_do_remove(client); 109 } 110 111 static const struct i2c_device_id ds1200_id[] = { 112 {"ds1200", 0}, 113 {} 114 }; 115 116 MODULE_DEVICE_TABLE(i2c, ds1200_id); 117 118 /* This is the driver that will be inserted */ 119 static struct i2c_driver ds1200_driver = { 120 .driver = { 121 .name = "ds1200", 122 }, 123 .probe = ds1200_probe, 124 .remove = ds1200_remove, 125 .id_table = ds1200_id, 126 }; 127 128 static int __init ds1200_init(void) 129 { 130 return i2c_add_driver(&ds1200_driver); 131 } 132 133 static void __exit ds1200_exit(void) 134 { 135 i2c_del_driver(&ds1200_driver); 136 } 137 138 139 Sysfs entries 140 ------------- 141 142 When probing the chip, the driver identifies which PMBus registers are 143 supported, and determines available sensors from this information. 144 Attribute files only exist if respective sensors are supported by the chip. 145 Labels are provided to inform the user about the sensor associated with 146 a given sysfs entry. 147 148 The following attributes are supported. Limits are read-write; all other 149 attributes are read-only. 150 151 inX_input Measured voltage. From READ_VIN or READ_VOUT register. 152 inX_min Minimum Voltage. 153 From VIN_UV_WARN_LIMIT or VOUT_UV_WARN_LIMIT register. 154 inX_max Maximum voltage. 155 From VIN_OV_WARN_LIMIT or VOUT_OV_WARN_LIMIT register. 156 inX_lcrit Critical minimum Voltage. 157 From VIN_UV_FAULT_LIMIT or VOUT_UV_FAULT_LIMIT register. 158 inX_crit Critical maximum voltage. 159 From VIN_OV_FAULT_LIMIT or VOUT_OV_FAULT_LIMIT register. 160 inX_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 161 inX_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 162 inX_lcrit_alarm Voltage critical low alarm. 163 From VOLTAGE_UV_FAULT status. 164 inX_crit_alarm Voltage critical high alarm. 165 From VOLTAGE_OV_FAULT status. 166 inX_label "vin", "vcap", or "voutY" 167 168 currX_input Measured current. From READ_IIN or READ_IOUT register. 169 currX_max Maximum current. 170 From IIN_OC_WARN_LIMIT or IOUT_OC_WARN_LIMIT register. 171 currX_lcrit Critical minimum output current. 172 From IOUT_UC_FAULT_LIMIT register. 173 currX_crit Critical maximum current. 174 From IIN_OC_FAULT_LIMIT or IOUT_OC_FAULT_LIMIT register. 175 currX_alarm Current high alarm. 176 From IIN_OC_WARNING or IOUT_OC_WARNING status. 177 currX_max_alarm Current high alarm. 178 From IIN_OC_WARN_LIMIT or IOUT_OC_WARN_LIMIT status. 179 currX_lcrit_alarm Output current critical low alarm. 180 From IOUT_UC_FAULT status. 181 currX_crit_alarm Current critical high alarm. 182 From IIN_OC_FAULT or IOUT_OC_FAULT status. 183 currX_label "iin" or "ioutY" 184 185 powerX_input Measured power. From READ_PIN or READ_POUT register. 186 powerX_cap Output power cap. From POUT_MAX register. 187 powerX_max Power limit. From PIN_OP_WARN_LIMIT or 188 POUT_OP_WARN_LIMIT register. 189 powerX_crit Critical output power limit. 190 From POUT_OP_FAULT_LIMIT register. 191 powerX_alarm Power high alarm. 192 From PIN_OP_WARNING or POUT_OP_WARNING status. 193 powerX_crit_alarm Output power critical high alarm. 194 From POUT_OP_FAULT status. 195 powerX_label "pin" or "poutY" 196 197 tempX_input Measured temperature. 198 From READ_TEMPERATURE_X register. 199 tempX_min Mimimum temperature. From UT_WARN_LIMIT register. 200 tempX_max Maximum temperature. From OT_WARN_LIMIT register. 201 tempX_lcrit Critical low temperature. 202 From UT_FAULT_LIMIT register. 203 tempX_crit Critical high temperature. 204 From OT_FAULT_LIMIT register. 205 tempX_min_alarm Chip temperature low alarm. Set by comparing 206 READ_TEMPERATURE_X with UT_WARN_LIMIT if 207 TEMP_UT_WARNING status is set. 208 tempX_max_alarm Chip temperature high alarm. Set by comparing 209 READ_TEMPERATURE_X with OT_WARN_LIMIT if 210 TEMP_OT_WARNING status is set. 211 tempX_lcrit_alarm Chip temperature critical low alarm. Set by comparing 212 READ_TEMPERATURE_X with UT_FAULT_LIMIT if 213 TEMP_UT_FAULT status is set. 214 tempX_crit_alarm Chip temperature critical high alarm. Set by comparing 215 READ_TEMPERATURE_X with OT_FAULT_LIMIT if 216 TEMP_OT_FAULT status is set.