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Date: Tue, 11 Jul 2017 18:13:10 +0200 From: Fabrice Gasnier <fabrice.gasnier@...com> To: <alexandre.torgue@...com>, <robh+dt@...nel.org> CC: <mcoquelin.stm32@...il.com>, <linux@...linux.org.uk>, <mark.rutland@....com>, <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <fabrice.gasnier@...com> Subject: [PATCH 2/2] ARM: dts: stm32: enable ADC on stm32h743i-eval board 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@...com> --- arch/arm/boot/dts/stm32h743i-eval.dts | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm/boot/dts/stm32h743i-eval.dts b/arch/arm/boot/dts/stm32h743i-eval.dts index c6effbb..6c07786 100644 --- a/arch/arm/boot/dts/stm32h743i-eval.dts +++ b/arch/arm/boot/dts/stm32h743i-eval.dts @@ -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 { -- 1.9.1
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