linux-kernel - [PATCH 06/10] thermal: renesas: rzg3e: add support for RZ/T2H and RZ/N2H

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251023081925.2412325-7-cosmin-gabriel.tanislav.xa@renesas.com>
Date: Thu, 23 Oct 2025 11:19:20 +0300
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
To: 
Cc: John Madieu <john.madieu.xa@...renesas.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Lukasz Luba <lukasz.luba@....com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
Subject: [PATCH 06/10] thermal: renesas: rzg3e: add support for RZ/T2H and RZ/N2H

The Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs expose the
temperature calibration via SMC SIP and do not have a reset for the
TSU peripheral, and use different minimum and maximum temperature values
compared to the already supported RZ/G3E.

Although the calibration data is stored in an OTP memory, the OTP itself
is not memory-mapped, access to it is done through an OTP controller.

The OTP controller is only accessible from the secure world,
but the temperature calibration data stored in the OTP is exposed via
SMC.

Add support for retrieving the calibration data using arm_smcc_smc().

Add a compatible for RZ/T2H, RZ/N2H can use it as a fallback.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
---
 drivers/thermal/renesas/rzg3e_thermal.c | 26 +++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/thermal/renesas/rzg3e_thermal.c b/drivers/thermal/renesas/rzg3e_thermal.c
index d2525ad3ffcc..efd09c35b216 100644
--- a/drivers/thermal/renesas/rzg3e_thermal.c
+++ b/drivers/thermal/renesas/rzg3e_thermal.c
@@ -72,6 +72,10 @@
 
 #define TSU_TEMP_MASK		GENMASK(11, 0)
 
+#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 {
@@ -381,6 +385,21 @@ 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_TEMP_MASK;
+
+	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_TEMP_MASK;
+
+	return 0;
+}
+
 static int rzg3e_thermal_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -539,8 +558,15 @@ 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);
-- 
2.51.1.dirty