Commit | Line | Data |
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84fc4585 GR |
1 | Kernel driver ucd9200 |
2 | ===================== | |
3 | ||
4 | Supported chips: | |
1f234ff1 | 5 | |
84fc4585 | 6 | * TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248 |
1f234ff1 | 7 | |
84fc4585 | 8 | Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246', |
1f234ff1 MCC |
9 | 'ucd9248' |
10 | ||
84fc4585 | 11 | Addresses scanned: - |
1f234ff1 | 12 | |
84fc4585 | 13 | Datasheets: |
1f234ff1 MCC |
14 | |
15 | - http://focus.ti.com/lit/ds/symlink/ucd9220.pdf | |
16 | - http://focus.ti.com/lit/ds/symlink/ucd9222.pdf | |
17 | - http://focus.ti.com/lit/ds/symlink/ucd9224.pdf | |
18 | - http://focus.ti.com/lit/ds/symlink/ucd9240.pdf | |
19 | - http://focus.ti.com/lit/ds/symlink/ucd9244.pdf | |
20 | - http://focus.ti.com/lit/ds/symlink/ucd9246.pdf | |
21 | - http://focus.ti.com/lit/ds/symlink/ucd9248.pdf | |
84fc4585 | 22 | |
e3333e57 | 23 | Author: Guenter Roeck <linux@roeck-us.net> |
84fc4585 GR |
24 | |
25 | ||
26 | Description | |
27 | ----------- | |
28 | ||
29 | [From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and | |
30 | UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers | |
31 | designed for non-isolated DC/DC power applications. The devices integrate | |
32 | dedicated circuitry for DC/DC loop management with flash memory and a serial | |
33 | interface to support configuration, monitoring and management. | |
34 | ||
35 | This driver is a client driver to the core PMBus driver. Please see | |
7ebd8b66 | 36 | Documentation/hwmon/pmbus.rst for details on PMBus client drivers. |
84fc4585 GR |
37 | |
38 | ||
39 | Usage Notes | |
40 | ----------- | |
41 | ||
42 | This driver does not auto-detect devices. You will have to instantiate the | |
ccf988b6 | 43 | devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for |
84fc4585 GR |
44 | details. |
45 | ||
46 | ||
47 | Platform data support | |
48 | --------------------- | |
49 | ||
50 | The driver supports standard PMBus driver platform data. Please see | |
7ebd8b66 | 51 | Documentation/hwmon/pmbus.rst for details. |
84fc4585 GR |
52 | |
53 | ||
54 | Sysfs entries | |
55 | ------------- | |
56 | ||
57 | The following attributes are supported. Limits are read-write; all other | |
58 | attributes are read-only. | |
59 | ||
1f234ff1 | 60 | ======================= ======================================================== |
84fc4585 GR |
61 | in1_label "vin". |
62 | in1_input Measured voltage. From READ_VIN register. | |
40e47125 | 63 | in1_min Minimum Voltage. From VIN_UV_WARN_LIMIT register. |
84fc4585 | 64 | in1_max Maximum voltage. From VIN_OV_WARN_LIMIT register. |
40e47125 | 65 | in1_lcrit Critical minimum Voltage. VIN_UV_FAULT_LIMIT register. |
1f234ff1 MCC |
66 | in1_crit Critical maximum voltage. From VIN_OV_FAULT_LIMIT |
67 | register. | |
84fc4585 GR |
68 | in1_min_alarm Voltage low alarm. From VIN_UV_WARNING status. |
69 | in1_max_alarm Voltage high alarm. From VIN_OV_WARNING status. | |
70 | in1_lcrit_alarm Voltage critical low alarm. From VIN_UV_FAULT status. | |
71 | in1_crit_alarm Voltage critical high alarm. From VIN_OV_FAULT status. | |
72 | ||
73 | in[2-5]_label "vout[1-4]". | |
74 | in[2-5]_input Measured voltage. From READ_VOUT register. | |
40e47125 | 75 | in[2-5]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. |
84fc4585 | 76 | in[2-5]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. |
40e47125 | 77 | in[2-5]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. |
1f234ff1 MCC |
78 | in[2-5]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT |
79 | register. | |
84fc4585 GR |
80 | in[2-5]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. |
81 | in[2-5]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. | |
1f234ff1 MCC |
82 | in[2-5]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT |
83 | status. | |
84 | in[2-5]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT | |
85 | status. | |
84fc4585 GR |
86 | |
87 | curr1_label "iin". | |
88 | curr1_input Measured current. From READ_IIN register. | |
89 | ||
90 | curr[2-5]_label "iout[1-4]". | |
91 | curr[2-5]_input Measured current. From READ_IOUT register. | |
92 | curr[2-5]_max Maximum current. From IOUT_OC_WARN_LIMIT register. | |
1f234ff1 MCC |
93 | curr[2-5]_lcrit Critical minimum output current. From |
94 | IOUT_UC_FAULT_LIMIT register. | |
95 | curr[2-5]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT | |
84fc4585 | 96 | register. |
84fc4585 GR |
97 | curr[2-5]_max_alarm Current high alarm. From IOUT_OC_WARNING status. |
98 | curr[2-5]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. | |
99 | ||
100 | power1_input Measured input power. From READ_PIN register. | |
101 | power1_label "pin" | |
102 | ||
103 | power[2-5]_input Measured output power. From READ_POUT register. | |
104 | power[2-5]_label "pout[1-4]" | |
105 | ||
106 | The number of output voltage, current, and power | |
107 | attribute sets is determined by the number of enabled | |
108 | rails. See chip datasheets for details. | |
109 | ||
110 | temp[1-5]_input Measured temperatures. From READ_TEMPERATURE_1 and | |
1f234ff1 | 111 | READ_TEMPERATURE_2 registers. |
84fc4585 GR |
112 | temp1 is the chip internal temperature. temp[2-5] are |
113 | rail temperatures. temp[2-5] attributes are only | |
114 | created for enabled rails. See chip datasheets for | |
115 | details. | |
116 | temp[1-5]_max Maximum temperature. From OT_WARN_LIMIT register. | |
117 | temp[1-5]_crit Critical high temperature. From OT_FAULT_LIMIT register. | |
118 | temp[1-5]_max_alarm Temperature high alarm. | |
119 | temp[1-5]_crit_alarm Temperature critical high alarm. | |
120 | ||
121 | fan1_input Fan RPM. ucd9240 only. | |
122 | fan1_alarm Fan alarm. ucd9240 only. | |
123 | fan1_fault Fan fault. ucd9240 only. | |
1f234ff1 | 124 | ======================= ======================================================== |