linux-kernel - [PATCH v3 08/11] arm64: dts: ti: k3-am62-wakeup: add VTM node

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Date:   Mon, 31 Oct 2022 18:26:59 -0500
From:   Bryan Brattlof <bb@...com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>
CC:     Keerthy <j-keerthy@...com>, Linux PM <linux-pm@...r.kernel.org>,
        Device Trees <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        LKML ARM <linux-arm-kernel@...ts.infradead.org>,
        Bryan Brattlof <bb@...com>
Subject: [PATCH v3 08/11] arm64: dts: ti: k3-am62-wakeup: add VTM node

The am62x supports a single Voltage and Thermal Management (VTM) module
located in the wakeup domain with two associated temperature monitors
located in hot spots of the die.

Signed-off-by: Bryan Brattlof <bb@...com>
---
 arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi | 33 +++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi  |  8 +++++
 arch/arm64/boot/dts/ti/k3-am62.dtsi         |  7 ++++-
 3 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi

diff --git a/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi
new file mode 100644
index 0000000000000..1819a6948b19d
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/thermal/thermal.h>
+
+thermal_zones: thermal-zones {
+	main0_thermal: main0-thermal {
+		polling-delay-passive = <250>;	/* milliSeconds */
+		polling-delay = <500>;		/* milliSeconds */
+		thermal-sensors = <&vtm0 0>;
+
+		trips {
+			main0_crit: main0-crit {
+				temperature = <105000>;	/* milliCelsius */
+				hysteresis = <2000>;	/* milliCelsius */
+				type = "critical";
+			};
+		};
+	};
+
+	main1_thermal: main1-thermal {
+		polling-delay-passive = <250>;	/* milliSeconds */
+		polling-delay = <500>;		/* milliSeconds */
+		thermal-sensors = <&vtm0 1>;
+
+		trips {
+			main1_crit: main1-crit {
+				temperature = <105000>;	/* milliCelsius */
+				hysteresis = <2000>;	/* milliCelsius */
+				type = "critical";
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
index 4090134676cf6..3954a73a33f35 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
@@ -38,4 +38,12 @@ wkup_i2c0: i2c@...00000 {
 		clocks = <&k3_clks 107 4>;
 		clock-names = "fck";
 	};
+
+	vtm0: temperature-sensor@...000 {
+		compatible = "ti,j7200-vtm";
+		reg = <0x00 0xb00000 0x00 0x400>,
+		      <0x00 0xb01000 0x00 0x400>;
+		power-domains = <&k3_pds 95 TI_SCI_PD_EXCLUSIVE>;
+		#thermal-sensor-cells = <1>;
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am62.dtsi b/arch/arm64/boot/dts/ti/k3-am62.dtsi
index 37fcbe7a3c336..1795f3ee534e0 100644
--- a/arch/arm64/boot/dts/ti/k3-am62.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62.dtsi
@@ -80,6 +80,7 @@ cbass_main: bus@...00 {
 			 <0x00 0x04000000 0x00 0x04000000 0x00 0x01ff1400>,
 
 			 /* Wakeup Domain Range */
+			 <0x00 0x00b00000 0x00 0x00b00000 0x00 0x00002400>, /* VTM */
 			 <0x00 0x2b000000 0x00 0x2b000000 0x00 0x00300400>,
 			 <0x00 0x43000000 0x00 0x43000000 0x00 0x00020000>;
 
@@ -94,10 +95,14 @@ cbass_wakeup: bus@...00000 {
 			compatible = "simple-bus";
 			#address-cells = <2>;
 			#size-cells = <2>;
-			ranges = <0x00 0x2b000000 0x00 0x2b000000 0x00 0x00300400>, /* Peripheral Window */
+			ranges = <0x00 0x00b00000 0x00 0x00b00000 0x00 0x00002400>, /* VTM */
+				 <0x00 0x2b000000 0x00 0x2b000000 0x00 0x00300400>, /* Peripheral Window */
 				 <0x00 0x43000000 0x00 0x43000000 0x00 0x00020000>;
 		};
 	};
+
+	#include "k3-am62-thermal.dtsi"
+
 };
 
 /* Now include the peripherals for each bus segments */
-- 
2.38.1