From 91ad4af4b29709462a2185c770ac1de9bd2e2c09 Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Fri, 8 Nov 2019 17:37:39 +0100 Subject: [PATCH] ARM: dts: stm32: add ADC support to stm32mp157c-ed1 Add ADC support to stm32mp157c-ed1 board. Following ADC signals are dedicated for analog and routed to connectors: - ADC1/2 in0 (ANA0) - ADC1/2 in1 (ANA1) - ADC1 in6 (PF12) Configure ADC1 with these signals. But keep it disabled by default, so PF12 can be used as gpio by default. Add VDD and VDDA supplies to ADC on stm32mp157c-ed1 board. This allows to get full ADC analog performances in case VDDA is below 2.7V (not the case by default). Signed-off-by: Fabrice Gasnier Signed-off-by: Alexandre Torgue --- arch/arm/boot/dts/stm32mp157c-ed1.dts | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts index 207146c98154a..341fb60644474 100644 --- a/arch/arm/boot/dts/stm32mp157c-ed1.dts +++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts @@ -89,6 +89,22 @@ }; }; +&adc { + /* ANA0, ANA1 are dedicated pins and don't need pinctrl: only in6. */ + pinctrl-0 = <&adc1_in6_pins_a>; + pinctrl-names = "default"; + vdd-supply = <&vdd>; + vdda-supply = <&vdda>; + vref-supply = <&vdda>; + status = "disabled"; + adc1: adc@0 { + st,adc-channels = <0 1 6>; + /* 16.5 ck_cycles sampling time */ + st,min-sample-time-nsecs = <400>; + status = "okay"; + }; +}; + &dac { pinctrl-names = "default"; pinctrl-0 = <&dac_ch1_pins_a &dac_ch2_pins_a>; -- 2.30.2