요약·해설과 원문, 전문 번역을 서로 분리했습니다. API 이름, symbol, source path는 원문 표기를 사용합니다.
1. 요약·해설
원문의 핵심 논리와 kernel programming 관점의 보충 설명입니다. 아래의 전문 번역과는 별도로 작성했습니다.
Fixed-supply capability flags
sysfs-class-usb_power_delivery:49-120첫 PDO인 1:fixed_supply는 mandatory vSafe5V object이며 dual-role, suspend, higher-capability, unconstrained-power, USB communication과 unchunked-message bit를 추가로 제공합니다.
Fixed-supply electrical fields
sysfs-class-usb_power_delivery:121-157Fixed supply는 voltage, source peak/maximum current, sink operational current와 Fast Role Swap 뒤 필요한 current level을 제공합니다.
Variable-supply voltage and current
sysfs-class-usb_power_delivery:158-190Variable PDO는 minimum·maximum voltage range와 그 범위에서 source가 공급하거나 sink가 요구하는 current를 제공합니다.
Battery-supply voltage and power
sysfs-class-usb_power_delivery:192-223Battery PDO는 minimum·maximum voltage와 source maximum allowable power 또는 sink operational power를 제공합니다.
SPR programmable power supply
sysfs-class-usb_power_delivery:225-256SPR PPS APDO는 programmable voltage range, maximum current와 request 시 rated output power를 초과할 수 있는지 나타내는 power-limited bit를 제공합니다.
2. 영어 원문 전체
번역 기준이 된 Linux v6.18.37 원문입니다. 줄 번호는 이 버전의 파일 좌표입니다.
원문 전체 펼치기
1
What: /sys/class/usb_power_delivery
2
Date: May 2022
3
Contact: Heikki Krogerus <[email protected]>
4
Description:
5
Directory for USB Power Delivery devices.
7
What: /sys/class/usb_power_delivery/.../revision
8
Date: May 2022
9
Contact: Heikki Krogerus <[email protected]>
10
Description:
11
File showing the USB Power Delivery Specification Revision used
12
in communication.
14
What: /sys/class/usb_power_delivery/.../version
15
Date: May 2022
16
Contact: Heikki Krogerus <[email protected]>
17
Description:
18
This is an optional attribute file showing the version of the
19
specific revision of the USB Power Delivery Specification. In
20
most cases the specification version is not known and the file
21
is not available.
23
What: /sys/class/usb_power_delivery/.../source-capabilities
24
Date: May 2022
25
Contact: Heikki Krogerus <[email protected]>
26
Description:
27
The source capabilities message "Source_Capabilities" contains a
28
set of Power Data Objects (PDO), each representing a type of
29
power supply. The order of the PDO objects is defined in the USB
30
Power Delivery Specification. Each PDO - power supply - will
31
have its own device, and the PDO device name will start with the
32
object position number as the first character followed by the
33
power supply type name (":" as delimiter).
35
/sys/class/usb_power_delivery/.../source_capabilities/<position>:<type>
37
What: /sys/class/usb_power_delivery/.../sink-capabilities
38
Date: May 2022
39
Contact: Heikki Krogerus <[email protected]>
40
Description:
41
The sink capability message "Sink_Capabilities" contains a set
42
of Power Data Objects (PDO) just like with source capabilities,
43
but instead of describing the power capabilities, these objects
44
describe the power requirements.
46
The order of the objects in the sink capability message is the
47
same as with the source capabilities message.
49
Fixed Supplies
51
What: /sys/class/usb_power_delivery/.../<capability>/<position>:fixed_supply
52
Date: May 2022
53
Contact: Heikki Krogerus <[email protected]>
54
Description:
55
Devices containing the attributes (the bit fields) defined for
56
Fixed Supplies.
58
The device "1:fixed_supply" is special. USB Power Delivery
59
Specification dictates that the first PDO (at object position
60
1), and the only mandatory PDO, is always the vSafe5V Fixed
61
Supply Object. vSafe5V Object has additional fields defined for
62
it that the other Fixed Supply Objects do not have and that are
63
related to the USB capabilities rather than power capabilities.
65
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/dual_role_power
66
Date: May 2022
67
Contact: Heikki Krogerus <[email protected]>
68
Description:
69
This file contains boolean value that tells does the device
70
support both source and sink power roles.
72
What: /sys/class/usb_power_delivery/.../source-capabilities/1:fixed_supply/usb_suspend_supported
73
Date: May 2022
74
Contact: Heikki Krogerus <[email protected]>
75
Description:
76
This file shows the value of the USB Suspend Supported bit in
77
vSafe5V Fixed Supply Object. If the bit is set then the device
78
will follow the USB 2.0 and USB 3.2 rules for suspend and
79
resume.
81
What: /sys/class/usb_power_delivery/.../sink-capabilities/1:fixed_supply/higher_capability
82
Date: February 2023
83
Contact: Saranya Gopal <[email protected]>
84
Description:
85
This file shows the value of the Higher capability bit in
86
vsafe5V Fixed Supply Object. If the bit is set, then the sink
87
needs more than vsafe5V(eg. 12 V) to provide full functionality.
88
Valid values: 0, 1
90
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unconstrained_power
91
Date: May 2022
92
Contact: Heikki Krogerus <[email protected]>
93
Description:
94
This file shows the value of the Unconstrained Power bit in
95
vSafe5V Fixed Supply Object. The bit is set when an external
96
source of power, powerful enough to power the entire system on
97
its own, is available for the device.
99
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/usb_communication_capable
100
Date: May 2022
101
Contact: Heikki Krogerus <[email protected]>
102
Description:
103
This file shows the value of the USB Communication Capable bit in
104
vSafe5V Fixed Supply Object.
106
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/dual_role_data
107
Date: May 2022
108
Contact: Heikki Krogerus <[email protected]>
109
Description:
110
This file shows the value of the Dual-Role Data bit in vSafe5V
111
Fixed Supply Object. Dual role data means ability act as both
112
USB host and USB device.
114
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unchunked_extended_messages_supported
115
Date: May 2022
116
Contact: Heikki Krogerus <[email protected]>
117
Description:
118
This file shows the value of the Unchunked Extended Messages
119
Supported bit in vSafe5V Fixed Supply Object.
121
What: /sys/class/usb_power_delivery/.../<capability>/<position>:fixed_supply/voltage
122
Date: May 2022
123
Contact: Heikki Krogerus <[email protected]>
124
Description:
125
The voltage the supply supports in millivolts.
127
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:fixed_supply/peak_current
128
Date: October 2023
129
Contact: Heikki Krogerus <[email protected]>
130
Description:
131
This file shows the value of the Fixed Power Source Peak Current
132
Capability field.
134
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:fixed_supply/maximum_current
135
Date: May 2022
136
Contact: Heikki Krogerus <[email protected]>
137
Description:
138
Maximum current of the fixed source supply in milliamperes.
140
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:fixed_supply/operational_current
141
Date: May 2022
142
Contact: Heikki Krogerus <[email protected]>
143
Description:
144
Operational current of the sink in milliamperes.
146
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:fixed_supply/fast_role_swap_current
147
Date: May 2022
148
Contact: Heikki Krogerus <[email protected]>
149
Description:
150
This file contains the value of the "Fast Role Swap USB Type-C
151
Current" field that tells the current level the sink requires
152
after a Fast Role Swap.
153
0 - Fast Swap not supported"
154
1 - Default USB Power"
155
2 - 1.5A@5V"
156
3 - 3.0A@5V"
158
Variable Supplies
160
What: /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply
161
Date: May 2022
162
Contact: Heikki Krogerus <[email protected]>
163
Description:
164
Variable Power Supply PDO.
166
What: /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply/maximum_voltage
167
Date: May 2022
168
Contact: Heikki Krogerus <[email protected]>
169
Description:
170
Maximum Voltage in millivolts.
172
What: /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply/minimum_voltage
173
Date: May 2022
174
Contact: Heikki Krogerus <[email protected]>
175
Description:
176
Minimum Voltage in millivolts.
178
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:variable_supply/maximum_current
179
Date: May 2022
180
Contact: Heikki Krogerus <[email protected]>
181
Description:
182
The maximum current in milliamperes that the source can supply
183
at the given Voltage range.
185
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:variable_supply/operational_current
186
Date: May 2022
187
Contact: Heikki Krogerus <[email protected]>
188
Description:
189
The operational current in milliamperes that the sink requires
190
at the given Voltage range.
192
Battery Supplies
194
What: /sys/class/usb_power_delivery/.../<capability>/<position>:battery
195
Date: May 2022
196
Contact: Heikki Krogerus <[email protected]>
197
Description:
198
Battery PDO.
200
What: /sys/class/usb_power_delivery/.../<capability>/<position>:battery/maximum_voltage
201
Date: May 2022
202
Contact: Heikki Krogerus <[email protected]>
203
Description:
204
Maximum Voltage in millivolts.
206
What: /sys/class/usb_power_delivery/.../<capability>/<position>:battery/minimum_voltage
207
Date: May 2022
208
Contact: Heikki Krogerus <[email protected]>
209
Description:
210
Minimum Voltage in millivolts.
212
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:battery/maximum_power
213
Date: May 2022
214
Contact: Heikki Krogerus <[email protected]>
215
Description:
216
Maximum allowable Power in milliwatts.
218
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:battery/operational_power
219
Date: May 2022
220
Contact: Heikki Krogerus <[email protected]>
221
Description:
222
The operational power that the sink requires at the given
223
voltage range.
225
Standard Power Range (SPR) Programmable Power Supplies
227
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply
228
Date: May 2022
229
Contact: Heikki Krogerus <[email protected]>
230
Description:
231
Programmable Power Supply (PPS) Augmented PDO (APDO).
233
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/maximum_voltage
234
Date: May 2022
235
Contact: Heikki Krogerus <[email protected]>
236
Description:
237
Maximum Voltage in millivolts.
239
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/minimum_voltage
240
Date: May 2022
241
Contact: Heikki Krogerus <[email protected]>
242
Description:
243
Minimum Voltage in millivolts.
245
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/maximum_current
246
Date: May 2022
247
Contact: Heikki Krogerus <[email protected]>
248
Description:
249
Maximum Current in milliamperes.
251
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:programmable_supply/pps_power_limited
252
Date: May 2022
253
Contact: Heikki Krogerus <[email protected]>
254
Description:
255
The PPS Power Limited bit indicates whether or not the source
256
supply will exceed the rated output power if requested.
3. 한국어 전문 번역
영어 원문의 문단 순서와 의미를 유지한 전체 번역입니다. 코드, 함수명, symbol과 URL은 원문 표기를 유지합니다.
USB Power Delivery device class
1-6| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | USB Power Delivery device를 위한 directory입니다. |
USB PD communication revision
7-13| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../revision |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Communication에 사용하는 USB Power Delivery Specification Revision을 표시하는 file입니다. |
USB PD specification version
14-22| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../version |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | 특정 USB Power Delivery Specification revision의 version을 표시하는 optional attribute file입니다. 대부분 specification version을 알 수 없어 file을 사용할 수 없습니다. |
Source capability PDO devices
23-36| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Source capability message "Source_Capabilities"는 각각 power supply type을 나타내는 Power Data Object(PDO) 집합을 담습니다. PDO object 순서는 USB Power Delivery Specification에 정의됩니다. 각 PDO, 즉 power supply에는 자체 device가 있으며 이름은 첫 character인 object position number, delimiter ":", power supply type name 순서입니다. |
/sys/class/usb_power_delivery/.../source_capabilities/<position>:<type>Sink capability PDO devices
37-48| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../sink-capabilities |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Sink capability message "Sink_Capabilities"도 source capability와 마찬가지로 PDO 집합을 담지만 power capability 대신 power requirement를 설명합니다. Sink capability message의 object 순서는 source capability message와 같습니다. |
/sys/class/usb_power_delivery device→source-capabilities 또는 sink-capabilities→Ordered PDO set→<position>:<type> child device→Supply-specific bit-field attributes
Source와 sink message의 ordered PDO가 position:type child device로 materialize됩니다.
CapabilityPDO가 설명하는 내용
source-capabilitiesSource가 제공할 수 있는 power supplies
sink-capabilitiesSink가 요구하는 power requirements
같은 object ordering을 공유하지만 기술하는 방향이 다릅니다.
Fixed-supply PDO device
49-64Fixed Supply에 적용됩니다.
| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:fixed_supply |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Fixed Supply에 정의된 attribute(bit field)를 담는 device입니다. "1:fixed_supply" device는 특별합니다. USB Power Delivery Specification에 따라 object position 1의 첫 PDO이자 유일한 mandatory PDO는 항상 vSafe5V Fixed Supply Object입니다. vSafe5V Object에는 다른 Fixed Supply Object에 없는 추가 field가 있으며 power capability가 아니라 USB capability와 관련됩니다. |
Fixed-supply dual-role power flag
65-71| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/dual_role_power |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Device가 source와 sink power role을 모두 지원하는지 알려 주는 boolean value를 담습니다. |
vSafe5V USB suspend support
72-80| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities/1:fixed_supply/usb_suspend_supported |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | vSafe5V Fixed Supply Object의 USB Suspend Supported bit value를 표시합니다. Bit가 set이면 device가 suspend와 resume에 관한 USB 2.0 및 USB 3.2 rule을 따릅니다. |
vSafe5V higher-capability flag
81-89| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../sink-capabilities/1:fixed_supply/higher_capability |
| Date | 2023년 2월 |
| Contact | Saranya Gopal <[email protected]> |
| Description | vSafe5V Fixed Supply Object의 Higher capability bit value를 표시합니다. Bit가 set이면 sink가 full functionality를 제공하기 위해 vSafe5V보다 높은 voltage, 예를 들어 12V를 필요로 합니다. |
| Valid values | 0, 1 |
vSafe5V unconstrained-power flag
90-98| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unconstrained_power |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | vSafe5V Fixed Supply Object의 Unconstrained Power bit value를 표시합니다. Device 자체만으로 전체 system에 power를 공급할 만큼 강력한 external power source를 사용할 수 있을 때 bit가 set됩니다. |
vSafe5V USB communication capability
99-105| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/usb_communication_capable |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | vSafe5V Fixed Supply Object의 USB Communication Capable bit value를 표시합니다. |
vSafe5V dual-role data capability
106-113| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/dual_role_data |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | vSafe5V Fixed Supply Object의 Dual-Role Data bit value를 표시합니다. Dual-role data는 USB host와 USB device 양쪽으로 동작할 수 있음을 뜻합니다. |
vSafe5V unchunked extended-message support
114-120| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unchunked_extended_messages_supported |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | vSafe5V Fixed Supply Object의 Unchunked Extended Messages Supported bit value를 표시합니다. |
Attribute의미
dual_role_powerSource와 sink role 모두 지원
usb_suspend_supportedUSB 2.0/3.2 suspend·resume rule 준수
higher_capabilityFull function에 vSafe5V보다 높은 voltage 필요
unconstrained_powerSystem 전체를 공급할 external source 존재
usb_communication_capableUSB communication capability
dual_role_dataHost와 device 양쪽 data role
unchunked_extended_messages_supportedUnchunked Extended Message 지원
Mandatory first PDO인 1:fixed_supply에 추가되는 USB-related bit입니다.
Fixed-supply voltage
121-126| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:fixed_supply/voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Supply가 지원하는 voltage입니다. |
| Unit | Millivolts |
Fixed-source peak-current capability
127-133| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities/<position>:fixed_supply/peak_current |
| Date | 2023년 10월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Fixed Power Source Peak Current Capability field value를 표시합니다. |
Fixed-source maximum current
134-139| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities/<position>:fixed_supply/maximum_current |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Fixed source supply의 maximum current입니다. |
| Unit | Milliamperes |
Fixed-sink operational current
140-145| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../sink-capabilities/<position>:fixed_supply/operational_current |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Sink의 operational current입니다. |
| Unit | Milliamperes |
Fast Role Swap sink current
146-157| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../sink-capabilities/<position>:fixed_supply/fast_role_swap_current |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | "Fast Role Swap USB Type-C Current" field value이며 Fast Role Swap 뒤 sink가 요구하는 current level을 알려 줍니다. |
| Values | 0: Fast Swap 미지원, 1: Default USB Power, 2: 1.5A@5V, 3: 3.0A@5V |
AttributeDirection단위/값
voltageSource or sink capabilitymV
peak_currentSourceCapability field
maximum_currentSourcemA
operational_currentSinkmA
fast_role_swap_currentSink after FRS0..3 encoded level
Source와 sink 방향에 따라 current field가 달라집니다.
값Required current
0Fast Swap not supported
1Default USB Power
21.5A @ 5V
33.0A @ 5V
Encoded field가 FRS 직후 sink requirement를 나타냅니다.
Variable-supply PDO
158-165Variable Supply에 적용됩니다.
| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Variable Power Supply PDO입니다. |
Variable-supply maximum voltage
166-171| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply/maximum_voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Maximum voltage입니다. |
| Unit | Millivolts |
Variable-supply minimum voltage
172-177| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply/minimum_voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Minimum voltage입니다. |
| Unit | Millivolts |
Variable-source maximum current
178-184| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities/<position>:variable_supply/maximum_current |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | 주어진 voltage range에서 source가 공급할 수 있는 maximum current입니다. |
| Unit | Milliamperes |
Variable-sink operational current
185-190| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../sink-capabilities/<position>:variable_supply/operational_current |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | 주어진 voltage range에서 sink가 요구하는 operational current입니다. |
| Unit | Milliamperes |
Field의미단위
minimum_voltageRange minimummV
maximum_voltageRange maximummV
maximum_currentSource supply limitmA
operational_currentSink requirementmA
Voltage range는 공통이며 current field는 source와 sink 방향별입니다.
Battery-supply PDO
192-199Battery Supply에 적용됩니다.
| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:battery |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Battery PDO입니다. |
Battery maximum voltage
200-205| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:battery/maximum_voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Maximum voltage입니다. |
| Unit | Millivolts |
Battery minimum voltage
206-211| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:battery/minimum_voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Minimum voltage입니다. |
| Unit | Millivolts |
Battery-source maximum power
212-217| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities/<position>:battery/maximum_power |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Maximum allowable power입니다. |
| Unit | Milliwatts |
Battery-sink operational power
218-223| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../sink-capabilities/<position>:battery/operational_power |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | 주어진 voltage range에서 sink가 요구하는 operational power입니다. |
FieldDirection단위
minimum_voltageSource or sink capabilitymV
maximum_voltageSource or sink capabilitymV
maximum_powerSource maximum allowablemW
operational_powerSink requirement원문 단위 미명시
Battery PDO는 current 대신 power requirement를 사용합니다.
SPR PPS APDO
225-232Standard Power Range(SPR) Programmable Power Supply에 적용됩니다.
| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Programmable Power Supply(PPS) Augmented PDO(APDO)입니다. |
PPS maximum voltage
233-238| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/maximum_voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Maximum voltage입니다. |
| Unit | Millivolts |
PPS minimum voltage
239-244| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/minimum_voltage |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Minimum voltage입니다. |
| Unit | Millivolts |
PPS maximum current
245-250| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/maximum_current |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | Maximum current입니다. |
| Unit | Milliamperes |
PPS power-limited indication
251-256| 항목 | 한국어 전문 번역 |
|---|---|
| What | /sys/class/usb_power_delivery/.../source-capabilities/<position>:programmable_supply/pps_power_limited |
| Date | 2022년 5월 |
| Contact | Heikki Krogerus <[email protected]> |
| Description | PPS Power Limited bit는 request를 받았을 때 source supply가 rated output power를 초과할지 여부를 나타냅니다. |
Field의미단위
minimum_voltageProgrammable range minimummV
maximum_voltageProgrammable range maximummV
maximum_currentMaximum output currentmA
pps_power_limitedRated output power 초과 가능 여부Bit
PPS APDO가 제공하는 programmable range와 source limit입니다.
USB PD class and capability hierarchy
sysfs-class-usb_power_delivery:1-48USB PD device는 communication revision·optional version과 source/sink capability PDO를 object position과 supply type별 child device로 노출합니다.