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From:   Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To:     linux-amlogic@lists.infradead.org, khilman@baylibre.com
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        narmstrong@baylibre.com,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH 2/5] ARM: dts: meson: add the ADC thermal sensor to meson.dtsi
Date:   Mon, 21 Dec 2020 19:13:03 +0100
Message-Id: <20201221181306.904272-3-martin.blumenstingl@googlemail.com>
In-Reply-To: <20201221181306.904272-1-martin.blumenstingl@googlemail.com>
References: <20201221181306.904272-1-martin.blumenstingl@googlemail.com>
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The SoC temperature can be retrieved from ADC channel 8 on all 32-bit
SoCs (Meson6, Meson8, Meson8b and Meson8m2). Add a "generic-adc-thermal"
instance to meson.dtsi so the thermal sensor is available for all SoCs.
If the temperature sensor calibration data is missing for a board then
the "generic-adc-thermal" will not probe and not register a thermal
sensor.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/meson.dtsi b/arch/arm/boot/dts/meson.dtsi
index 5f074f7aa1a2..e0ca5f08d07d 100644
--- a/arch/arm/boot/dts/meson.dtsi
+++ b/arch/arm/boot/dts/meson.dtsi
@@ -298,6 +298,13 @@ efuse: nvmem@0 {
 		};
 	};
 
+	thermal_sensor: thermal-sensor {
+		compatible = "generic-adc-thermal";
+		#thermal-sensor-cells = <0>;
+		io-channels = <&saradc 8>;
+		io-channel-names = "sensor-channel";
+	};
+
 	xtal: xtal-clk {
 		compatible = "fixed-clock";
 		clock-frequency = <24000000>;
-- 
2.29.2