linux-kernel - [PATCH 1/6] arm64: dts: ti: k3-am64-main: add VTM node

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Message-ID: <20230119221322.12563-2-bb@ti.com>
Date:   Thu, 19 Jan 2023 16:13:17 -0600
From:   Bryan Brattlof <bb@...com>
To:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     ARM Linux Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Device Tree Mailing List <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bryan Brattlof <bb@...com>
Subject: [PATCH 1/6] arm64: dts: ti: k3-am64-main: add VTM node

The am64x supports a single VTM module which is located in the main
domain with two associated temperature monitors located at different hot
spots on the die.

Signed-off-by: Bryan Brattlof <bb@...com>
---
 arch/arm64/boot/dts/ti/k3-am64-main.dtsi    |  8 +++++
 arch/arm64/boot/dts/ti/k3-am64-thermal.dtsi | 33 +++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am64.dtsi         |  3 ++
 3 files changed, 44 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am64-thermal.dtsi

diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
index 5e8036f32d79d..dc8c1c6021630 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
@@ -1392,4 +1392,12 @@ elm0: ecc@...10000 {
 		clock-names = "fck";
 		status = "disabled";
 	};
+
+	main_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-am64-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am64-thermal.dtsi
new file mode 100644
index 0000000000000..036db56ba7977
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am64-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 = <&main_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 = <&main_vtm0 1>;
+
+		trips {
+			main1_crit: main1-crit {
+				temperature = <105000>;	/* milliCelsius */
+				hysteresis = <2000>;	/* milliCelsius */
+				type = "critical";
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am64.dtsi b/arch/arm64/boot/dts/ti/k3-am64.dtsi
index c858725133af4..3ac0545cbfe6f 100644
--- a/arch/arm64/boot/dts/ti/k3-am64.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64.dtsi
@@ -69,6 +69,7 @@ cbass_main: bus@...00 {
 			 <0x00 0x00420000 0x00 0x00420000 0x00 0x00001000>, /* ESM0 */
 			 <0x00 0x00600000 0x00 0x00600000 0x00 0x00001100>, /* GPIO */
 			 <0x00 0x00a40000 0x00 0x00a40000 0x00 0x00000800>, /* Timesync router */
+			 <0x00 0x00b00000 0x00 0x00b00000 0x00 0x00002400>, /* VTM */
 			 <0x00 0x01000000 0x00 0x01000000 0x00 0x02330400>, /* First peripheral window */
 			 <0x00 0x08000000 0x00 0x08000000 0x00 0x00200000>, /* Main CPSW */
 			 <0x00 0x0d000000 0x00 0x0d000000 0x00 0x00800000>, /* PCIE_CORE */
@@ -105,6 +106,8 @@ cbass_mcu: bus@...0000 {
 			ranges = <0x00 0x04000000 0x00 0x04000000 0x00 0x01ff1400>; /* Peripheral window */
 		};
 	};
+
+	#include "k3-am64-thermal.dtsi"
 };
 
 /* Now include the peripherals for each bus segments */
-- 
2.39.0