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regulator: Add support for ramp delay

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Changing voltage and enabling regulator might require delays so the
regulator stabilizes at expected level.

Add support for "regulator-ramp-delay" binding which can introduce
required time to both enabling the regulator and to changing the
voltage.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Krzysztof Kozlowski
2019-03-06 19:37:54 +01:00
committed by Minkyu Kang
parent fce8610060
commit e66d1cb3c2
3 changed files with 49 additions and 2 deletions
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2
doc/device-tree-bindings/regulator/regulator.txt
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@@ -35,6 +35,7 @@ Optional properties:
- regulator-max-microamp: a maximum allowed Current value
- regulator-always-on: regulator should never be disabled
- regulator-boot-on: enabled by bootloader/firmware
- regulator-ramp-delay: ramp delay for regulator (in uV/us)
Note
The "regulator-name" constraint is used for setting the device's uclass
@@ -60,4 +61,5 @@ ldo0 {
regulator-max-microamp = <100000>;
regulator-always-on;
regulator-boot-on;
regulator-ramp-delay = <12000>;
};