Commit Graph

7 Commits

Author SHA1 Message Date
Venkat Reddy Talla 91ff811f32 regulator: max77620: check for valid regulator info
SD4 regulator is not registered with regulator core
framework in probe as there is no support in MAX77620 PMIC,
removing SD4 entry from MAX77620 regulator information list
and checking for valid regulator information data before
configuring FPS source and FPS power up/down period to avoid
NULL pointer exception if regulator not registered with core.

Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-29 18:50:05 +01:00
Laxman Dewangan 5aa43599da regulator: max77620: Add support for device specific ramp rate setting
Maxim advertised the ramp rate of the rail with some recommended
design specification like output capacitance of rail should be
2.2uF. This make sure that current change in the rail is within
maximum current limit and hence meet the advertised ramp rate.

If there is variation in design which causes the rail current to
change more that maximum current limit then device applies the
current limit. In this case, ramp rate is different than advertised
ramp rate.

Add device specific settings for ramp rate which need to be configure
on device register when measure ramp rate on platform is deviated from
advertised ramp rate. In this case, all delay time calculation for
voltage change is done with measured ramp rate and device ramp rate
is used for configuring the device register.

If measured ramp rate in the platform is same as advertised ramp rate
then regulator-ramp-delay is used for the device register configuration
and ramp time calculation for voltage change.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-22 16:26:41 +01:00
Laxman Dewangan 51817f468f regulator: max77620: Add support to configure active-discharge
Add regulator ops callback for configuration of active-discharge
and provide necessarily information via regulator descriptor.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-03-02 23:31:45 +09:00
Axel Lin 4d92325125 regulator: max77620: Remove duplicate module alias
The same alias is already in .id_table.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-26 10:36:54 +09:00
Axel Lin aad76f743b regulator: max77620: Eliminate duplicate code
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-26 10:36:54 +09:00
Axel Lin 47dbdbf64f regulator: max77620: Remove unused fields
These fields are never used and not required at all, remove them.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-26 10:36:54 +09:00
Laxman Dewangan 5b1c20286f regulator: max77620: add regulator driver for max77620/max20024
MAXIM Semiconductor's PMIC, MAX77620 and MAX20024 have the
multiple DCDC and LDOs. This supplies the power to different
components of the system.
Also these rails has configuration for ramp time, flexible
power sequence, slew rate etc.

Add regulator driver to access these rails via regulator APIs.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mallikarjun Kasoju <mkasoju@nvidia.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-20 01:01:17 +09:00