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| author |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-31 10:36:37 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-09-10 11:25:10 +0800 |
| commit | f59c8f9fe689790248ae7aa7426579982050638c (patch) | |
| tree | 8913b43ef7c4799323cc0d14fc1447da5ca2e052 /Documentation/ABI | |
| parent | Linux 3.6-rc4 (diff) | |
| download | linux-dev-f59c8f9fe689790248ae7aa7426579982050638c.tar.xz linux-dev-f59c8f9fe689790248ae7aa7426579982050638c.zip | |
regulator: core: Support bypass mode
Many regulators support a bypass mode where they simply switch their
input supply to the output. This is mainly used in low power retention
states where power consumption is extremely low so higher voltage or
less clean supplies can be used.
Support this by providing ops for the drivers and a consumer API which
allows the device to be put into bypass mode if all consumers enable it
and the machine enables permission for this.
This is not supported as a mode since the existing modes are rarely used
due to fuzzy definition and mostly redundant with modern hardware which is
able to respond promptly to load changes.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Graeme Gregory <gg@slimlogic.co.uk>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-regulator | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-regulator b/Documentation/ABI/testing/sysfs-class-regulator index e091fa873792..bc578bc60628 100644 --- a/Documentation/ABI/testing/sysfs-class-regulator +++ b/Documentation/ABI/testing/sysfs-class-regulator @@ -349,3 +349,24 @@ Description: This will be one of the same strings reported by the "state" attribute. + +What: /sys/class/regulator/.../bypass +Date: September 2012 +KernelVersion: 3.7 +Contact: Mark Brown <broonie@opensource.wolfsonmicro.com> +Description: + Some regulator directories will contain a field called + bypass. This indicates if the device is in bypass mode. + + This will be one of the following strings: + + 'enabled' + 'disabled' + 'unknown' + + 'enabled' means the regulator is in bypass mode. + + 'disabled' means that the regulator is regulating. + + 'unknown' means software cannot determine the state, or + the reported state is invalid. |