linux-kernel - [PATCH AUTOSEL 4.19 130/191] ARM: dts: meson8b: odroidc1: enable the SAR ADC

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Date:   Sat,  9 Nov 2019 21:39:12 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Sasha Levin <sashal@...nel.org>, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org
Subject: [PATCH AUTOSEL 4.19 130/191] ARM: dts: meson8b: odroidc1: enable the SAR ADC

From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

[ Upstream commit fd6643142a0c5ab4d423ed7173a0be414d509214 ]

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@...glemail.com>
Signed-off-by: Kevin Hilman <khilman@...libre.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 8fdeeffecbdbc..8a09071d712a5 100644
--- a/arch/arm/boot/dts/meson8b-odroidc1.dts
+++ b/arch/arm/boot/dts/meson8b-odroidc1.dts
@@ -153,6 +153,11 @@
 	pinctrl-names = "default";
 };
 
+&saradc {
+	status = "okay";
+	vref-supply = <&vcc_1v8>;
+};
+
 &sdio {
 	status = "okay";
 
-- 
2.20.1