From fd6643142a0c5ab4d423ed7173a0be414d509214 Mon Sep 17 00:00:00 2001
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: Thu, 13 Sep 2018 22:29:18 +0200
Subject: [PATCH] ARM: dts: meson8b: odroidc1: enable the SAR ADC

Odroid-C1 exposes ADC channels 0 and 1 on the GPIO headers. NOTE: Due
to the SoC design these are limited to 1.8V (instead of 3.3V like all
other pins).
Enable the SAR ADC to enable voltage measurements on these pins.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
---
 arch/arm/boot/dts/meson8b-odroidc1.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts
index a08dccccdb5e..7c1225658567 100644
--- a/arch/arm/boot/dts/meson8b-odroidc1.dts
+++ b/arch/arm/boot/dts/meson8b-odroidc1.dts
@@ -246,6 +246,11 @@
 	pinctrl-names = "default";
 };
 
+&saradc {
+	status = "okay";
+	vref-supply = <&vcc_1v8>;
+};
+
 &sdio {
 	status = "okay";