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regulator: max77620: Add details of device specific ramp rate setting 

It is observed that the ramp rate measured on platform is not same as
advertised ramp rate due to platform design variation. On this case,
measured ramp rate is provided with property regulator-ramp-rate.

For such cases, add DT property for device specific configurations.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Laxman Dewangan 2016-04-22 18:09:40 +05:30 committed by Mark Brown
parent f55532a0c0
commit e7fc278ceb
1 changed files with 22 additions and 0 deletions
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22
Documentation/devicetree/bindings/regulator/regulator-max77620.txt
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@ -94,6 +94,28 @@ Following are additional properties:
This is applicable if suspend state
FPS source is selected as FPS0, FPS1 or
FPS2.
- maxim,ramp-rate-setting: integer, ramp rate(uV/us) setting to be
configured to the device.
The platform may have different ramp
rate than advertised ramp rate if it has
design variation from Maxim's
recommended. On this case, platform
specific ramp rate is used for ramp time
calculation and this property is used
for device register configurations.
The measured ramp rate of platform is
provided by the regulator-ramp-delay
as described in <devicetree/bindings/
regulator/regulator.txt>.
Maxim Max77620 supports following ramp
delay:
SD: 13.75mV/us, 27.5mV/us, 55mV/us
LDOs: 5mV/us, 100mV/us
Note: If the measured ramp delay is same as advertised ramp delay then it is not
required to provide the ramp delay with property "maxim,ramp-rate-setting". The
ramp rate can be provided by the regulator-ramp-delay which will be used for
ramp time calculation for voltage change as well as for device configuration.
Example:
--------