Some PWM regulator has the exponential transition in voltage change as opposite to fixed slew-rate linear transition on other regulators. For such PWM regulators, add the property for providing the delay from DT node.
Add DT binding details of the new property "pwm-regulator-voltage-ramp-time-us" added for providing voltage transition delay. Signed-off-by: Laxman Dewangan <[email protected]> CC: Douglas Anderson <[email protected]> CC: Aleksandr Frid <[email protected]> --- This patch is continuation of discussion on patch regulator: pwm: Fix regulator ramp delay for continuous mode https://patchwork.kernel.org/patch/9216857/ where is it discussed to have separate property for PWM which has exponential voltage transition. --- Documentation/devicetree/bindings/regulator/pwm-regulator.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt index 3aeba9f..a163f42 100644 --- a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt @@ -54,6 +54,16 @@ Optional properties: -------------------- - enable-gpios: GPIO to use to enable/disable the regulator +- pwm-regulator-voltage-ramp-time-us: Integer, voltage ramp time in + microseconds. Some PWM regulator has the exponential + transition in voltage change as opposite to fixed + slew-rate linear transition on other regulators. + For such regulator, this property is used to provide + the settling time for voltage change which is same + for any voltage change. + If PWM regulator supports the fixed slew rate then + property "regulator-ramp-delay" should be used. + Any property defined as part of the core regulator binding can also be used. (See: ../regulator/regulator.txt) -- 2.1.4
