From 1b2f27365528abeb48198d88f4e461c4b41fe2ff Mon Sep 17 00:00:00 2001
From: Francois Ramu <francois.ramu@st.com>
Date: Thu, 17 Mar 2022 09:11:03 +0100
Subject: [PATCH] dts: binding: stm32adc set the VREf as a property

Add the Vref reference voltage in the DTS, so that the adc driver
can retrieve the value for conversion.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
---
 dts/bindings/adc/st,stm32-adc.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dts/bindings/adc/st,stm32-adc.yaml b/dts/bindings/adc/st,stm32-adc.yaml
index a8a42486fda..48af5c0e4db 100644
--- a/dts/bindings/adc/st,stm32-adc.yaml
+++ b/dts/bindings/adc/st,stm32-adc.yaml
@@ -27,6 +27,12 @@ properties:
     pinctrl-names:
       required: true
 
+    vref_mv:
+      type: int
+      required: false
+      default: 3300
+      description: Indicates the reference voltage of the ADC in mV.
+
     has-temp-channel:
       type: boolean
       description: Indicates if the ADC has a dedicated internal temperature sensor channel.