diff options
Diffstat (limited to 'Documentation/ABI')
-rw-r--r-- | Documentation/ABI/testing/sysfs-devices-power | 27 | ||||
-rw-r--r-- | Documentation/ABI/testing/sysfs-power | 5 |
2 files changed, 29 insertions, 3 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-power b/Documentation/ABI/testing/sysfs-devices-power index efe449bdf811..7dbf96b724ed 100644 --- a/Documentation/ABI/testing/sysfs-devices-power +++ b/Documentation/ABI/testing/sysfs-devices-power | |||
@@ -187,7 +187,7 @@ Description: | |||
187 | Not all drivers support this attribute. If it isn't supported, | 187 | Not all drivers support this attribute. If it isn't supported, |
188 | attempts to read or write it will yield I/O errors. | 188 | attempts to read or write it will yield I/O errors. |
189 | 189 | ||
190 | What: /sys/devices/.../power/pm_qos_latency_us | 190 | What: /sys/devices/.../power/pm_qos_resume_latency_us |
191 | Date: March 2012 | 191 | Date: March 2012 |
192 | Contact: Rafael J. Wysocki <rjw@rjwysocki.net> | 192 | Contact: Rafael J. Wysocki <rjw@rjwysocki.net> |
193 | Description: | 193 | Description: |
@@ -205,6 +205,31 @@ Description: | |||
205 | This attribute has no effect on system-wide suspend/resume and | 205 | This attribute has no effect on system-wide suspend/resume and |
206 | hibernation. | 206 | hibernation. |
207 | 207 | ||
208 | What: /sys/devices/.../power/pm_qos_latency_tolerance_us | ||
209 | Date: January 2014 | ||
210 | Contact: Rafael J. Wysocki <rjw@rjwysocki.net> | ||
211 | Description: | ||
212 | The /sys/devices/.../power/pm_qos_latency_tolerance_us attribute | ||
213 | contains the PM QoS active state latency tolerance limit for the | ||
214 | given device in microseconds. That is the maximum memory access | ||
215 | latency the device can suffer without any visible adverse | ||
216 | effects on user space functionality. If that value is the | ||
217 | string "any", the latency does not matter to user space at all, | ||
218 | but hardware should not be allowed to set the latency tolerance | ||
219 | for the device automatically. | ||
220 | |||
221 | Reading "auto" from this file means that the maximum memory | ||
222 | access latency for the device may be determined automatically | ||
223 | by the hardware as needed. Writing "auto" to it allows the | ||
224 | hardware to be switched to this mode if there are no other | ||
225 | latency tolerance requirements from the kernel side. | ||
226 | |||
227 | This attribute is only present if the feature controlled by it | ||
228 | is supported by the hardware. | ||
229 | |||
230 | This attribute has no effect on runtime suspend and resume of | ||
231 | devices and on system-wide suspend/resume and hibernation. | ||
232 | |||
208 | What: /sys/devices/.../power/pm_qos_no_power_off | 233 | What: /sys/devices/.../power/pm_qos_no_power_off |
209 | Date: September 2012 | 234 | Date: September 2012 |
210 | Contact: Rafael J. Wysocki <rjw@rjwysocki.net> | 235 | Contact: Rafael J. Wysocki <rjw@rjwysocki.net> |
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power index 205a73878441..64c9276e9421 100644 --- a/Documentation/ABI/testing/sysfs-power +++ b/Documentation/ABI/testing/sysfs-power | |||
@@ -12,8 +12,9 @@ Contact: Rafael J. Wysocki <rjw@rjwysocki.net> | |||
12 | Description: | 12 | Description: |
13 | The /sys/power/state file controls the system power state. | 13 | The /sys/power/state file controls the system power state. |
14 | Reading from this file returns what states are supported, | 14 | Reading from this file returns what states are supported, |
15 | which is hard-coded to 'standby' (Power-On Suspend), 'mem' | 15 | which is hard-coded to 'freeze' (Low-Power Idle), 'standby' |
16 | (Suspend-to-RAM), and 'disk' (Suspend-to-Disk). | 16 | (Power-On Suspend), 'mem' (Suspend-to-RAM), and 'disk' |
17 | (Suspend-to-Disk). | ||
17 | 18 | ||
18 | Writing to this file one of these strings causes the system to | 19 | Writing to this file one of these strings causes the system to |
19 | transition into that state. Please see the file | 20 | transition into that state. Please see the file |