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ARM: dts: stm32: enable ADC on stm32h743i-eval board

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There's a potentiometer connected to ADC1 and ADC2 in0 on
stm32h743i-eval board.
- Add fixed-voltage 'vdda' regulator that supplies 'vref' pin.
  It's used as voltage reference for ADC and/or DAC.
- Enable ADC1 in0 input (arbitrary choice: could be ADC2 as well).
Note: No pinctrl is needed to use in0 dedicated analog input pin
(e.g. ADC12_INP0).

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Fabrice Gasnier 2017-07-11 18:13:00 +02:00 committed by Alexandre Torgue
parent 079af0c40f
commit 090992a9ca
1 changed files with 18 additions and 0 deletions
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18
arch/arm/boot/dts/stm32h743i-eval.dts
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@ -60,6 +60,24 @@
aliases {
serial0 = &usart1;
};
vdda: regulator-vdda {
compatible = "regulator-fixed";
regulator-name = "vdda";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
};
&adc_12 {
vref-supply = <&vdda>;
status = "okay";
adc1: adc@0 {
/* potentiometer */
st,adc-channels = <0>;
status = "okay";
};
};
&clk_hse {