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regulator: Add STM32 Voltage Reference Buffer

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Document STM32 VREFBUF (voltage reference buffer) which can be used as
voltage reference for ADCs, DACs and external components.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Fabrice Gasnier 2017-08-30 17:55:27 +02:00 committed by Mark Brown
parent 5771a8c088
commit ef7bb293a6
1 changed files with 20 additions and 0 deletions
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Documentation/devicetree/bindings/regulator/st,stm32-vrefbuf.txt Normal file
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STM32 VREFBUF - Voltage reference buffer
Some STM32 devices embed a voltage reference buffer which can be used as
voltage reference for ADCs, DACs and also as voltage reference for external
components through the dedicated VREF+ pin.
Required properties:
- compatible: Must be "st,stm32-vrefbuf".
- reg: Offset and length of VREFBUF register set.
- clocks: Must contain an entry for peripheral clock.
Example:
vrefbuf: regulator@58003C00 {
compatible = "st,stm32-vrefbuf";
reg = <0x58003C00 0x8>;
clocks = <&rcc VREF_CK>;
regulator-min-microvolt = <1500000>;
regulator-max-microvolt = <2500000>;
vdda-supply = <&vdda>;
};