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372 lines
12 KiB
372 lines
12 KiB
What: /sys/class/regulator/.../state |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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state. This reports the regulator enable control, for |
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regulators which can report that input value. |
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This will be one of the following strings: |
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'enabled' |
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'disabled' |
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'unknown' |
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'enabled' means the regulator output is ON and is supplying |
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power to the system (assuming no error prevents it). |
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'disabled' means the regulator output is OFF and is not |
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supplying power to the system (unless some non-Linux |
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control has enabled it). |
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'unknown' means software cannot determine the state, or |
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the reported state is invalid. |
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NOTE: this field can be used in conjunction with microvolts |
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or microamps to determine configured regulator output levels. |
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What: /sys/class/regulator/.../status |
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Description: |
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Some regulator directories will contain a field called |
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"status". This reports the current regulator status, for |
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regulators which can report that output value. |
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This will be one of the following strings: |
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- off |
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- on |
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- error |
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- fast |
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- normal |
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- idle |
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- standby |
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"off" means the regulator is not supplying power to the |
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system. |
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"on" means the regulator is supplying power to the system, |
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and the regulator can't report a detailed operation mode. |
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"error" indicates an out-of-regulation status such as being |
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disabled due to thermal shutdown, or voltage being unstable |
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because of problems with the input power supply. |
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"fast", "normal", "idle", and "standby" are all detailed |
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regulator operation modes (described elsewhere). They |
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imply "on", but provide more detail. |
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Note that regulator status is a function of many inputs, |
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not limited to control inputs from Linux. For example, |
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the actual load presented may trigger "error" status; or |
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a regulator may be enabled by another user, even though |
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Linux did not enable it. |
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What: /sys/class/regulator/.../type |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Each regulator directory will contain a field called |
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type. This holds the regulator type. |
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This will be one of the following strings: |
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- 'voltage' |
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- 'current' |
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- 'unknown' |
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'voltage' means the regulator output voltage can be controlled |
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by software. |
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'current' means the regulator output current limit can be |
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controlled by software. |
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'unknown' means software cannot control either voltage or |
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current limit. |
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What: /sys/class/regulator/.../microvolts |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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microvolts. This holds the regulator output voltage setting |
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measured in microvolts (i.e. E-6 Volts), for regulators |
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which can report the control input for voltage. |
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NOTE: This value should not be used to determine the regulator |
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output voltage level as this value is the same regardless of |
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whether the regulator is enabled or disabled. |
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What: /sys/class/regulator/.../microamps |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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microamps. This holds the regulator output current limit |
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setting measured in microamps (i.e. E-6 Amps), for regulators |
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which can report the control input for a current limit. |
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NOTE: This value should not be used to determine the regulator |
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output current level as this value is the same regardless of |
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whether the regulator is enabled or disabled. |
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What: /sys/class/regulator/.../opmode |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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opmode. This holds the current regulator operating mode, |
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for regulators which can report that control input value. |
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The opmode value can be one of the following strings: |
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- 'fast' |
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- 'normal' |
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- 'idle' |
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- 'standby' |
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- 'unknown' |
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The modes are described in include/linux/regulator/consumer.h |
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NOTE: This value should not be used to determine the regulator |
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output operating mode as this value is the same regardless of |
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whether the regulator is enabled or disabled. A "status" |
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attribute may be available to determine the actual mode. |
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What: /sys/class/regulator/.../min_microvolts |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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min_microvolts. This holds the minimum safe working regulator |
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output voltage setting for this domain measured in microvolts, |
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for regulators which support voltage constraints. |
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NOTE: this will return the string 'constraint not defined' if |
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the power domain has no min microvolts constraint defined by |
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platform code. |
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What: /sys/class/regulator/.../max_microvolts |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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max_microvolts. This holds the maximum safe working regulator |
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output voltage setting for this domain measured in microvolts, |
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for regulators which support voltage constraints. |
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NOTE: this will return the string 'constraint not defined' if |
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the power domain has no max microvolts constraint defined by |
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platform code. |
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What: /sys/class/regulator/.../min_microamps |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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min_microamps. This holds the minimum safe working regulator |
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output current limit setting for this domain measured in |
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microamps, for regulators which support current constraints. |
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NOTE: this will return the string 'constraint not defined' if |
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the power domain has no min microamps constraint defined by |
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platform code. |
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What: /sys/class/regulator/.../max_microamps |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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max_microamps. This holds the maximum safe working regulator |
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output current limit setting for this domain measured in |
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microamps, for regulators which support current constraints. |
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NOTE: this will return the string 'constraint not defined' if |
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the power domain has no max microamps constraint defined by |
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platform code. |
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What: /sys/class/regulator/.../name |
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Date: October 2008 |
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KernelVersion: 2.6.28 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Each regulator directory will contain a field called |
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name. This holds a string identifying the regulator for |
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display purposes. |
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NOTE: this will be empty if no suitable name is provided |
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by platform or regulator drivers. |
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What: /sys/class/regulator/.../num_users |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Each regulator directory will contain a field called |
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num_users. This holds the number of consumer devices that |
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have called regulator_enable() on this regulator. |
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What: /sys/class/regulator/.../requested_microamps |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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requested_microamps. This holds the total requested load |
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current in microamps for this regulator from all its consumer |
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devices. |
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What: /sys/class/regulator/.../parent |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a link called parent. |
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This points to the parent or supply regulator if one exists. |
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What: /sys/class/regulator/.../suspend_mem_microvolts |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_mem_microvolts. This holds the regulator output |
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voltage setting for this domain measured in microvolts when |
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the system is suspended to memory, for voltage regulators |
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implementing suspend voltage configuration constraints. |
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What: /sys/class/regulator/.../suspend_disk_microvolts |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_disk_microvolts. This holds the regulator output |
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voltage setting for this domain measured in microvolts when |
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the system is suspended to disk, for voltage regulators |
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implementing suspend voltage configuration constraints. |
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What: /sys/class/regulator/.../suspend_standby_microvolts |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_standby_microvolts. This holds the regulator output |
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voltage setting for this domain measured in microvolts when |
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the system is suspended to standby, for voltage regulators |
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implementing suspend voltage configuration constraints. |
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What: /sys/class/regulator/.../suspend_mem_mode |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_mem_mode. This holds the regulator operating mode |
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setting for this domain when the system is suspended to |
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memory, for regulators implementing suspend mode |
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configuration constraints. |
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What: /sys/class/regulator/.../suspend_disk_mode |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_disk_mode. This holds the regulator operating mode |
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setting for this domain when the system is suspended to disk, |
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for regulators implementing suspend mode configuration |
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constraints. |
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What: /sys/class/regulator/.../suspend_standby_mode |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_standby_mode. This holds the regulator operating mode |
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setting for this domain when the system is suspended to |
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standby, for regulators implementing suspend mode |
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configuration constraints. |
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What: /sys/class/regulator/.../suspend_mem_state |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_mem_state. This holds the regulator operating state |
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when suspended to memory, for regulators implementing suspend |
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configuration constraints. |
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This will be one of the same strings reported by |
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the "state" attribute. |
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What: /sys/class/regulator/.../suspend_disk_state |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_disk_state. This holds the regulator operating state |
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when suspended to disk, for regulators implementing |
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suspend configuration constraints. |
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This will be one of the same strings reported by |
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the "state" attribute. |
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What: /sys/class/regulator/.../suspend_standby_state |
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Date: May 2008 |
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KernelVersion: 2.6.26 |
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Contact: Liam Girdwood <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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suspend_standby_state. This holds the regulator operating |
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state when suspended to standby, for regulators implementing |
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suspend configuration constraints. |
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This will be one of the same strings reported by |
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the "state" attribute. |
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What: /sys/class/regulator/.../bypass |
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Date: September 2012 |
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KernelVersion: 3.7 |
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Contact: Mark Brown <[email protected]> |
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Description: |
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Some regulator directories will contain a field called |
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bypass. This indicates if the device is in bypass mode. |
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This will be one of the following strings: |
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- 'enabled' |
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- 'disabled' |
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- 'unknown' |
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'enabled' means the regulator is in bypass mode. |
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'disabled' means that the regulator is regulating. |
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'unknown' means software cannot determine the state, or |
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the reported state is invalid.
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