From 58fd822b2e344edae6b4dbc09b19bd0c4a2f8f60 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Tue, 14 Jun 2016 11:13:22 +0200 Subject: [PATCH] regulator: pwm: Document pwm-dutycycle-unit and pwm-dutycycle-range Document the pwm-dutycycle-unit and pwm-dutycycle-range properties. Signed-off-by: Boris Brezillon Acked-by: Brian Norris Acked-by: Rob Herring Acked-by: Mark Brown Signed-off-by: Thierry Reding --- .../bindings/regulator/pwm-regulator.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt index dd6f59cf1455..3aeba9f86ed8 100644 --- a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt @@ -34,6 +34,18 @@ Only required for Voltage Table Mode: First cell is voltage in microvolts (uV) Second cell is duty-cycle in percent (%) +Optional properties for Continuous mode: +- pwm-dutycycle-unit: Integer value encoding the duty cycle unit. If not + defined, <100> is assumed, meaning that + pwm-dutycycle-range contains values expressed in + percent. + +- pwm-dutycycle-range: Should contain 2 entries. The first entry is encoding + the dutycycle for regulator-min-microvolt and the + second one the dutycycle for regulator-max-microvolt. + Duty cycle values are expressed in pwm-dutycycle-unit. + If not defined, <0 100> is assumed. + NB: To be clear, if voltage-table is provided, then the device will be used in Voltage Table Mode. If no voltage-table is provided, then the device will be used in Continuous Voltage Mode. @@ -53,6 +65,13 @@ Continuous Voltage With Enable GPIO Example: regulator-min-microvolt = <1016000>; regulator-max-microvolt = <1114000>; regulator-name = "vdd_logic"; + /* unit == per-mille */ + pwm-dutycycle-unit = <1000>; + /* + * Inverted PWM logic, and the duty cycle range is limited + * to 30%-70%. + */ + pwm-dutycycle-range <700 300>; /* */ }; Voltage Table Example: -- 2.20.1