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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 <boris.brezillon@free-electrons.com>
Acked-by: Brian Norris <briannorris@chromium.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Boris Brezillon 2016-06-14 11:13:22 +02:00 committed by Thierry Reding
parent ea398e2873
commit 58fd822b2e
1 changed files with 19 additions and 0 deletions
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19
Documentation/devicetree/bindings/regulator/pwm-regulator.txt
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@ -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: