arm64: dts: ti: k3-am62a-wakeup: add VTM node

The am62ax supports a single Voltage and Thermal Management (VTM) device
located in the wakeup domain with three associated temperature monitors
located in various hot spots of the die.

Signed-off-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20230405215328.3755561-4-bb@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi
new file mode 100644 (file)
index 0000000..85ce545
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi
@@ -0,0 +1,47 @@
+// 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 = <&wkup_vtm0 0>;
+
+               trips {
+                       main0_crit: main0-crit {
+                               temperature = <125000>; /* milliCelsius */
+                               hysteresis = <2000>;    /* milliCelsius */
+                               type = "critical";
+                       };
+               };
+       };
+
+       main1_thermal: main1-thermal {
+               polling-delay-passive = <250>;  /* milliSeconds */
+               polling-delay = <500>;          /* milliSeconds */
+               thermal-sensors = <&wkup_vtm0 1>;
+
+               trips {
+                       main1_crit: main1-crit {
+                               temperature = <125000>; /* milliCelsius */
+                               hysteresis = <2000>;    /* milliCelsius */
+                               type = "critical";
+                       };
+               };
+       };
+
+       main2_thermal: main2-thermal {
+              polling-delay-passive = <250>;   /* milliSeconds */
+              polling-delay = <500>;           /* milliSeconds */
+              thermal-sensors = <&wkup_vtm0 2>;
+
+               trips {
+                       main2_crit: main2-crit {
+                               temperature = <125000>; /* milliCelsius */
+                               hysteresis = <2000>;    /* milliCelsius */
+                               type = "critical";
+                       };
+               };
+       };
+};

diff --git a/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
index d848eb2..4e8279f 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
@@ -62,4 +62,12 @@
                /* Used by DM firmware */
                status = "reserved";
        };
+
+       wkup_vtm0: temperature-sensor@b00000 {
+               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-am62a.dtsi b/arch/arm64/boot/dts/ti/k3-am62a.dtsi
index fe60c9c..61a210e 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am62a.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a.dtsi
@@ -115,6 +115,8 @@
                                 <0x00 0x78100000 0x00 0x78100000 0x00 0x00008000>; /* DM R5 BTCM*/
                };
        };
+
+       #include "k3-am62a-thermal.dtsi"
 };
 
 /* Now include the peripherals for each bus segments */