diff --git a/drivers/thermal/renesas/rzg3e_thermal.c b/drivers/thermal/renesas/rzg3e_thermal.c
index 97c4053303e0..dde021e283b7 100644
--- a/drivers/thermal/renesas/rzg3e_thermal.c
+++ b/drivers/thermal/renesas/rzg3e_thermal.c
@@ -4,6 +4,7 @@
  *
  * Copyright (C) 2025 Renesas Electronics Corporation
  */
+#include <linux/arm-smccc.h>
 #include <linux/clk.h>
 #include <linux/cleanup.h>
 #include <linux/delay.h>
@@ -70,6 +71,10 @@
 #define TSU_POLL_DELAY_US	10	/* Polling interval */
 #define TSU_MIN_CLOCK_RATE	24000000  /* TSU_PCLK minimum 24MHz */
 
+#define RZ_SIP_SVC_GET_SYSTSU	0x82000022
+#define OTP_TSU_REG_ADR_TEMPHI	0x01DC
+#define OTP_TSU_REG_ADR_TEMPLO	0x01DD
+
 struct rzg3e_thermal_priv;
 
 struct rzg3e_thermal_info {
@@ -362,6 +367,21 @@ static int rzg3e_thermal_get_syscon_trim(struct rzg3e_thermal_priv *priv)
 	return 0;
 }
 
+static int rzg3e_thermal_get_smc_trim(struct rzg3e_thermal_priv *priv)
+{
+	struct arm_smccc_res local_res;
+
+	arm_smccc_smc(RZ_SIP_SVC_GET_SYSTSU, OTP_TSU_REG_ADR_TEMPLO,
+		      0, 0, 0, 0, 0, 0, &local_res);
+	priv->trmval0 = local_res.a0 & TSU_CODE_MAX;
+
+	arm_smccc_smc(RZ_SIP_SVC_GET_SYSTSU, OTP_TSU_REG_ADR_TEMPHI,
+		      0, 0, 0, 0, 0, 0, &local_res);
+	priv->trmval1 = local_res.a0 & TSU_CODE_MAX;
+
+	return 0;
+}
+
 static int rzg3e_thermal_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -524,8 +544,15 @@ static const struct rzg3e_thermal_info rzg3e_thermal_info = {
 	.temp_e_mc = 126000,
 };
 
+static const struct rzg3e_thermal_info rzt2h_thermal_info = {
+	.get_trim = rzg3e_thermal_get_smc_trim,
+	.temp_d_mc = -40000,
+	.temp_e_mc = 125000,
+};
+
 static const struct of_device_id rzg3e_thermal_dt_ids[] = {
 	{ .compatible = "renesas,r9a09g047-tsu", .data = &rzg3e_thermal_info },
+	{ .compatible = "renesas,r9a09g077-tsu", .data = &rzt2h_thermal_info },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, rzg3e_thermal_dt_ids);