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 to tell that voltage change is exponential and having fixed delay for any level of change. Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx> CC: Douglas Anderson <dianders@xxxxxxxxxxxx> CC: Aleksandr Frid <afrid@xxxxxxxxxx> --- 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. Changes from V1: - Pass the flag to tell that voltage ramp is exponential instead of providing delay. --- .../devicetree/bindings/regulator/pwm-regulator.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt index 3aeba9f..2d9ef3a 100644 --- a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt @@ -54,6 +54,18 @@ Optional properties: -------------------- - enable-gpios: GPIO to use to enable/disable the regulator +- voltage-ramp-exponential: Boolean, Some of PWM regulator has the exponential + transition in voltage ramp as opposite to fixed + slew-rate linear transition on other regulators. + For such PWM regulator, presence of this property will + tell that value of the regulator ramp delay provided by + DT property "regulator-ramp-delay" is exponential and + fixed delay for any voltage level change. + If PWM regulator supports the fixed linear slew rate + then this property should be absent from DT node and + property "regulator-ramp-delay" is used as linear slew + rate. + Any property defined as part of the core regulator binding can also be used. (See: ../regulator/regulator.txt) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
