diff options
Diffstat (limited to 'Documentation/devicetree/bindings/regulator/pwm-regulator.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/regulator/pwm-regulator.txt | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt new file mode 100644 index 000000000000..ef560e1e2261 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt @@ -0,0 +1,47 @@ +PWM controlled regulators + +Required properties: +- compatible : Must be "regulator-pwm". +- pwms : Must be pwm-list specified by pwm binding pwm.txt +- regulator-min-microvolt : Must be smallest voltage at pwm duty cycle 0% +- regulator-max-microvolt : Must be largest voltage at pwm duty cycle 100% + (must be above min; if equal, then use a fixed + regulator) + +Optional properties: +- regulator-n-voltages : number of voltages, if specified implies evenly + distributed duty cycle levels; must be at least 2 +- voltage-time-sel : time in microseconds of voltage transition between + voltage levels (specified if regulator settling time + is independent of voltage change; for regulators with + fixed slew-rate use regulator-ramp-delay property) + +Control GPIOs specified according to gpio binding in gpio.txt +- enable-gpio : GPIO to use to enable/disable the regulator +- idle-gpio : GPIO to use to enter/exit regulator idle mode +- standby-gpio : GPIO to use to enter/exit regulator standby mode + +Any property defined as part of the pwm user binding in pwm.txt. +Any property defined as part of the core regulator binding in regulator.txt. + +Example: + + pwm: pwm-controller { + #pwm-cells = <2>; + }; + + abc_pwm_reg: pwm-regulator { + compatible = "regulator-pwm"; + pwms = <&pwm 0 3000>; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <2500000>; + + regulator-name = "vdd-abc-pwm-reg"; + regulator-enable-ramp-delay = <700>; + regulator-boot-on; + + regulator-n-voltages = <64>; + voltage-time-sel = <50>; + enable-gpio = <&gpio0 21 0x0>; + standby-gpio = <&gpio0 22 0x0>; + }; |