[PATCH 6.1.y-cip 0/7] RZ/G3S: Backport TSU support

[PATCH 6.1.y-cip 0/7] RZ/G3S: Backport TSU support

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Hi,

Series backports the TSU (Thermal Sensor Unit) support for RZ/G3S.

Thank you,
Claudiu

Claudiu Beznea (7):
  clk: renesas: r8a08g045: Check the source of the CPU PLL settings
  clk: renesas: r9a08g045: Add clocks, resets and power domain support
    for the TSU IP
  dt-bindings: thermal: r9a08g045-tsu: Document the TSU unit
  thermal/drivers/renesas/rzg3s: Add thermal driver for the Renesas
    RZ/G3S SoC
  arm64: dts: renesas: r9a08g045: Add OPP table
  arm64: dts: renesas: r9a08g045: Add TSU node
  arm64: defconfig: Enable Renesas RZ/G3S thermal driver

 .../thermal/renesas,r9a08g045-tsu.yaml        |  93 ++++++
 MAINTAINERS                                   |   7 +
 arch/arm64/boot/dts/renesas/r9a08g045.dtsi    |  77 ++++-
 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     |   4 -
 arch/arm64/configs/defconfig                  |   1 +
 drivers/clk/renesas/r9a08g045-cpg.c           |   7 +-
 drivers/clk/renesas/rzg2l-cpg.c               |  13 +-
 drivers/clk/renesas/rzg2l-cpg.h               |  10 +-
 drivers/thermal/Kconfig                       |   8 +
 drivers/thermal/Makefile                      |   1 +
 drivers/thermal/rzg3s_thermal.c               | 292 ++++++++++++++++++
 11 files changed, 502 insertions(+), 11 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml
 create mode 100644 drivers/thermal/rzg3s_thermal.c

-- 
2.43.0

[PATCH 6.1.y-cip 1/7] clk: renesas: r8a08g045: Check the source of the CPU PLL settings

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit dc0f16c1b76293ac942a783e960abfd19e95fdf5 upstream.

On the RZ/G3S SoC, the CPU PLL settings can be set and retrieved through
the CPG_PLL1_CLK1 and CPG_PLL1_CLK2 registers.  However, these settings
are applied only when CPG_PLL1_SETTING.SEL_PLL1 is set to 0.
Otherwise, the CPU PLL operates at the default frequency of 1.1 GHz.
Hence add support to the PLL driver for returning the 1.1 GHz frequency
when the CPU PLL is configured with the default frequency.

Fixes: 01eabef547e6 ("clk: renesas: rzg2l: Add support for RZ/G3S PLL")
Fixes: de60a3ebe410 ("clk: renesas: Add minimal boot support for RZ/G3S SoC")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250115142059.1833063-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 drivers/clk/renesas/r9a08g045-cpg.c |  5 +++--
 drivers/clk/renesas/rzg2l-cpg.c     | 13 ++++++++++++-
 drivers/clk/renesas/rzg2l-cpg.h     | 10 +++++++---
 3 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/renesas/r9a08g045-cpg.c b/drivers/clk/renesas/r9a08g045-cpg.c
index 89d6f361a5d3..eddf6cad8d35 100644
--- a/drivers/clk/renesas/r9a08g045-cpg.c
+++ b/drivers/clk/renesas/r9a08g045-cpg.c
@@ -50,7 +50,7 @@
 #define G3S_SEL_SDHI2		SEL_PLL_PACK(G3S_CPG_SDHI_DSEL, 8, 2)
 
 /* PLL 1/4/6 configuration registers macro. */
-#define G3S_PLL146_CONF(clk1, clk2)	((clk1) << 22 | (clk2) << 12)
+#define G3S_PLL146_CONF(clk1, clk2, setting)	((clk1) << 22 | (clk2) << 12 | (setting))
 
 #define DEF_G3S_MUX(_name, _id, _conf, _parent_names, _mux_flags, _clk_flags) \
 	DEF_TYPE(_name, _id, CLK_TYPE_MUX, .conf = (_conf), \
@@ -133,7 +133,8 @@ static const struct cpg_core_clk r9a08g045_core_clks[] __initconst = {
 
 	/* Internal Core Clocks */
 	DEF_FIXED(".osc_div1000", CLK_OSC_DIV1000, CLK_EXTAL, 1, 1000),
-	DEF_G3S_PLL(".pll1", CLK_PLL1, CLK_EXTAL, G3S_PLL146_CONF(0x4, 0x8)),
+	DEF_G3S_PLL(".pll1", CLK_PLL1, CLK_EXTAL, G3S_PLL146_CONF(0x4, 0x8, 0x100),
+		    1100000000UL),
 	DEF_FIXED(".pll2", CLK_PLL2, CLK_EXTAL, 200, 3),
 	DEF_FIXED(".pll3", CLK_PLL3, CLK_EXTAL, 200, 3),
 	DEF_FIXED(".pll4", CLK_PLL4, CLK_EXTAL, 100, 3),
diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c
index 0d7e0fa73fff..0f7f876b352a 100644
--- a/drivers/clk/renesas/rzg2l-cpg.c
+++ b/drivers/clk/renesas/rzg2l-cpg.c
@@ -53,6 +53,7 @@
 #define RZG3S_DIV_M		GENMASK(25, 22)
 #define RZG3S_DIV_NI		GENMASK(21, 13)
 #define RZG3S_DIV_NF		GENMASK(12, 1)
+#define RZG3S_SEL_PLL		BIT(0)
 
 #define CLK_ON_R(reg)		(reg)
 #define CLK_MON_R(reg)		(0x180 + (reg))
@@ -62,6 +63,7 @@
 #define GET_REG_OFFSET(val)		((val >> 20) & 0xfff)
 #define GET_REG_SAMPLL_CLK1(val)	((val >> 22) & 0xfff)
 #define GET_REG_SAMPLL_CLK2(val)	((val >> 12) & 0xfff)
+#define GET_REG_SAMPLL_SETTING(val)	((val) & 0xfff)
 
 #define CPG_WEN_BIT		BIT(16)
 
@@ -954,6 +956,7 @@ rzg2l_cpg_sipll5_register(const struct cpg_core_clk *core,
 
 struct pll_clk {
 	struct clk_hw hw;
+	unsigned long default_rate;
 	unsigned int conf;
 	unsigned int type;
 	void __iomem *base;
@@ -991,12 +994,19 @@ static unsigned long rzg3s_cpg_pll_clk_recalc_rate(struct clk_hw *hw,
 {
 	struct pll_clk *pll_clk = to_pll(hw);
 	struct rzg2l_cpg_priv *priv = pll_clk->priv;
-	u32 nir, nfr, mr, pr, val;
+	u32 nir, nfr, mr, pr, val, setting;
 	u64 rate;
 
 	if (pll_clk->type != CLK_TYPE_G3S_PLL)
 		return parent_rate;
 
+	setting = GET_REG_SAMPLL_SETTING(pll_clk->conf);
+	if (setting) {
+		val = readl(priv->base + setting);
+		if (val & RZG3S_SEL_PLL)
+			return pll_clk->default_rate;
+	}
+
 	val = readl(priv->base + GET_REG_SAMPLL_CLK1(pll_clk->conf));
 
 	pr = 1 << FIELD_GET(RZG3S_DIV_P, val);
@@ -1050,6 +1060,7 @@ rzg2l_cpg_pll_clk_register(const struct cpg_core_clk *core,
 	pll_clk->base = base;
 	pll_clk->priv = priv;
 	pll_clk->type = core->type;
+	pll_clk->default_rate = core->default_rate;
 
 	return clk_register(NULL, &pll_clk->hw);
 }
diff --git a/drivers/clk/renesas/rzg2l-cpg.h b/drivers/clk/renesas/rzg2l-cpg.h
index d9be4317e587..118610936194 100644
--- a/drivers/clk/renesas/rzg2l-cpg.h
+++ b/drivers/clk/renesas/rzg2l-cpg.h
@@ -92,7 +92,10 @@ struct cpg_core_clk {
 	const struct clk_div_table *dtable;
 	const u32 *mtable;
 	const unsigned long invalid_rate;
-	const unsigned long max_rate;
+	union {
+		const unsigned long max_rate;
+		const unsigned long default_rate;
+	};
 	const char * const *parent_names;
 	notifier_fn_t notifier;
 	u32 flag;
@@ -134,8 +137,9 @@ enum clk_types {
 	DEF_TYPE(_name, _id, _type, .parent = _parent)
 #define DEF_SAMPLL(_name, _id, _parent, _conf) \
 	DEF_TYPE(_name, _id, CLK_TYPE_SAM_PLL, .parent = _parent, .conf = _conf)
-#define DEF_G3S_PLL(_name, _id, _parent, _conf) \
-	DEF_TYPE(_name, _id, CLK_TYPE_G3S_PLL, .parent = _parent, .conf = _conf)
+#define DEF_G3S_PLL(_name, _id, _parent, _conf, _default_rate) \
+	DEF_TYPE(_name, _id, CLK_TYPE_G3S_PLL, .parent = _parent, .conf = _conf, \
+		 .default_rate = _default_rate)
 #define DEF_INPUT(_name, _id) \
 	DEF_TYPE(_name, _id, CLK_TYPE_IN)
 #define DEF_FIXED(_name, _id, _parent, _mult, _div) \
-- 
2.43.0

[PATCH 6.1.y-cip 2/7] clk: renesas: r9a08g045: Add clocks, resets and power domain support for the TSU IP

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit 5599c7c4b4df440aa4a470a5b72669081413981f upstream.

Add clocks, resets and power domains for the TSU IP available on the
Renesas RZ/G3S SoC.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250103163805.1775705-2-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[claudiu.beznea: drop the power domain description array as the core code
 is not available in v6.1 CIP]
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 drivers/clk/renesas/r9a08g045-cpg.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/renesas/r9a08g045-cpg.c b/drivers/clk/renesas/r9a08g045-cpg.c
index eddf6cad8d35..acfa9fa01031 100644
--- a/drivers/clk/renesas/r9a08g045-cpg.c
+++ b/drivers/clk/renesas/r9a08g045-cpg.c
@@ -237,6 +237,7 @@ static const struct rzg2l_mod_clk r9a08g045_mod_clks[] = {
 	DEF_MOD("gpio_hclk",		R9A08G045_GPIO_HCLK, R9A08G045_OSCCLK, 0x598, 0),
 	DEF_MOD("adc_adclk",		R9A08G045_ADC_ADCLK, R9A08G045_CLK_TSU, 0x5a8, 0),
 	DEF_MOD("adc_pclk",		R9A08G045_ADC_PCLK, R9A08G045_CLK_TSU, 0x5a8, 1),
+	DEF_MOD("tsu_pclk",		R9A08G045_TSU_PCLK, R9A08G045_CLK_TSU, 0x5ac, 0),
 	DEF_MOD("vbat_bclk",		R9A08G045_VBAT_BCLK, R9A08G045_OSCCLK, 0x614, 0),
 };
 
@@ -271,6 +272,7 @@ static const struct rzg2l_reset r9a08g045_resets[] = {
 	DEF_RST(R9A08G045_GPIO_SPARE_RESETN, 0x898, 2),
 	DEF_RST(R9A08G045_ADC_PRESETN, 0x8a8, 0),
 	DEF_RST(R9A08G045_ADC_ADRST_N, 0x8a8, 1),
+	DEF_RST(R9A08G045_TSU_PRESETN, 0x8ac, 0),
 	DEF_RST(R9A08G045_VBAT_BRESETN, 0x914, 0),
 };
 
-- 
2.43.0

[PATCH 6.1.y-cip 3/7] dt-bindings: thermal: r9a08g045-tsu: Document the TSU unit

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit a3152e5c742ca2557c5cd0e5a9e6ca6b9a92df93 upstream.

The Renesas RZ/G3S SoC includes a Thermal Sensor Unit (TSU) block designed
to measure the junction temperature. The temperature is measured using
the RZ/G3S ADC, with a dedicated ADC channel directly connected to the TSU.
Add documentation for it.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20250810122125.792966-2-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 .../thermal/renesas,r9a08g045-tsu.yaml        | 93 +++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml

diff --git a/Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml b/Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml
new file mode 100644
index 000000000000..573e2b9d3752
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml
@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/renesas,r9a08g045-tsu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G3S Thermal Sensor Unit
+
+description:
+  The thermal sensor unit (TSU) measures the temperature(Tj) inside
+  the LSI.
+
+maintainers:
+  - Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
+
+$ref: thermal-sensor.yaml#
+
+properties:
+  compatible:
+    const: renesas,r9a08g045-tsu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: TSU module clock
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    items:
+      - description: TSU module reset
+
+  io-channels:
+    items:
+      - description: ADC channel which reports the TSU temperature
+
+  io-channel-names:
+    items:
+      - const: tsu
+
+  "#thermal-sensor-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - power-domains
+  - resets
+  - io-channels
+  - io-channel-names
+  - '#thermal-sensor-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a08g045-cpg.h>
+
+    tsu: thermal@10059000 {
+        compatible = "renesas,r9a08g045-tsu";
+        reg = <0x10059000 0x1000>;
+        clocks = <&cpg CPG_MOD R9A08G045_TSU_PCLK>;
+        resets = <&cpg R9A08G045_TSU_PRESETN>;
+        power-domains = <&cpg>;
+        #thermal-sensor-cells = <0>;
+        io-channels = <&adc 8>;
+        io-channel-names = "tsu";
+    };
+
+    thermal-zones {
+        cpu-thermal {
+            polling-delay-passive = <250>;
+            polling-delay = <1000>;
+            thermal-sensors = <&tsu>;
+
+            trips {
+                sensor_crit: sensor-crit {
+                    temperature = <125000>;
+                    hysteresis = <1000>;
+                    type = "critical";
+                };
+                target: trip-point {
+                    temperature = <100000>;
+                    hysteresis = <1000>;
+                    type = "passive";
+                };
+            };
+        };
+    };
-- 
2.43.0

[PATCH 6.1.y-cip 4/7] thermal/drivers/renesas/rzg3s: Add thermal driver for the Renesas RZ/G3S SoC

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit dc095b37b09e1abbdb6daf5e69dbd0cd5265087e upstream.

The Renesas RZ/G3S SoC features a Thermal Sensor Unit (TSU) that reports
the junction temperature. The temperature is reported through a dedicated
ADC channel. Add a driver for the Renesas RZ/G3S TSU.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20250810122125.792966-3-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[claudiu.beznea:
 - fixed conflict in MAINTAINERS files as "RENESAS X9250 DIGITAL
   POTENTIOMETERS DRIVER" is not found in v6.1 CIP
 - deleted drivers/thermal/renesas/{Kconfig, Makefile} as the renesas
   directory is not available in v6.1 CIP and updated instead the
   drivers/thermal/{Kconfig, Makfile}
 - moved drivers/thermal/renesas/rzg3s_thermal.c to
   drivers/thermal/rzg3s_thermal.c as the renesas directory is not
   available in v6.1 CIP
 - included "thermal_hwmon.h" instead of "../thermal_hwmon.h"
 - replaced thermal_zone_device_priv(rz) with tz->devdata as
   thermal_zone_device_priv is not in v6.1 CIP
 - used devm_reset_control_get_exclusive() + reset_control_deassert() +
   devm_add_action_or_reset() instead of
   devm_reset_control_get_exclusive_deasserted() as the latter is not
   available in v6.1 CIP; added
   rzg3s_thermal_reset_deassert() action function for this
 - used thermal_add_hwmon_sysfs() + devm_add_action_or_reset() instead
   of devm_thermal_add_hwmon_sysfs() as the latter is not available in
   v6.1 CIP; added rzg3s_thermal_rem_hwmon_sysfs() for this
 - added pm_runtime_mark_last_busy() as it is not embedded in
   pm_runtime_put_autosuspend() on v6.1 CIP]
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 MAINTAINERS                     |   7 +
 drivers/thermal/Kconfig         |   8 +
 drivers/thermal/Makefile        |   1 +
 drivers/thermal/rzg3s_thermal.c | 292 ++++++++++++++++++++++++++++++++
 4 files changed, 308 insertions(+)
 create mode 100644 drivers/thermal/rzg3s_thermal.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 7f1c190f9468..f87e337db1e1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17676,6 +17676,13 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/clock/renesas,versaclock7.yaml
 F:	drivers/clk/clk-versaclock7.c
 
+RENESAS RZ/G3S THERMAL SENSOR UNIT DRIVER
+M:	Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
+L:	linux-pm@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml
+F:	drivers/thermal/renesas/rzg3s_thermal.c
+
 RESET CONTROLLER FRAMEWORK
 M:	Philipp Zabel <p.zabel@pengutronix.de>
 S:	Maintained
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index e052dae614eb..4bd995d9eb08 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -365,6 +365,14 @@ config RZG2L_THERMAL
 	  Enable this to plug the RZ/G2L thermal sensor driver into the Linux
 	  thermal framework.
 
+config RZG3S_THERMAL
+	tristate "Renesas RZ/G3S thermal driver"
+	depends on ARCH_R9A08G045 || COMPILE_TEST
+	depends on OF && IIO && RZG2L_ADC
+	help
+	  Enable this to plug the RZ/G3S thermal sensor driver into the Linux
+	  thermal framework.
+
 config KIRKWOOD_THERMAL
 	tristate "Temperature sensor on Marvell Kirkwood SoCs"
 	depends on MACH_KIRKWOOD || COMPILE_TEST
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index 2506c6c8ca83..a3498d4cb553 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_ROCKCHIP_THERMAL)	+= rockchip_thermal.o
 obj-$(CONFIG_RCAR_THERMAL)	+= rcar_thermal.o
 obj-$(CONFIG_RCAR_GEN3_THERMAL)	+= rcar_gen3_thermal.o
 obj-$(CONFIG_RZG2L_THERMAL)	+= rzg2l_thermal.o
+obj-$(CONFIG_RZG3S_THERMAL)	+= rzg3s_thermal.o
 obj-$(CONFIG_KIRKWOOD_THERMAL)  += kirkwood_thermal.o
 obj-y				+= samsung/
 obj-$(CONFIG_DOVE_THERMAL)  	+= dove_thermal.o
diff --git a/drivers/thermal/rzg3s_thermal.c b/drivers/thermal/rzg3s_thermal.c
new file mode 100644
index 000000000000..b2a98168e6b4
--- /dev/null
+++ b/drivers/thermal/rzg3s_thermal.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G3S TSU Thermal Sensor Driver
+ *
+ * Copyright (C) 2024 Renesas Electronics Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/iio/consumer.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/thermal.h>
+#include <linux/units.h>
+
+#include "thermal_hwmon.h"
+
+#define TSU_SM			0x0
+#define TSU_SM_EN		BIT(0)
+#define TSU_SM_OE		BIT(1)
+#define OTPTSUTRIM_REG(n)	(0x18 + (n) * 0x4)
+#define OTPTSUTRIM_EN_MASK	BIT(31)
+#define OTPTSUTRIM_MASK		GENMASK(11, 0)
+
+#define TSU_READ_STEPS		8
+
+/* Default calibration values, if FUSE values are missing. */
+#define SW_CALIB0_VAL		1297
+#define SW_CALIB1_VAL		751
+
+#define MCELSIUS(temp)		((temp) * MILLIDEGREE_PER_DEGREE)
+
+/**
+ * struct rzg3s_thermal_priv - RZ/G3S thermal private data structure
+ * @base: TSU base address
+ * @dev: device pointer
+ * @tz: thermal zone pointer
+ * @rstc: reset control
+ * @channel: IIO channel to read the TSU
+ * @mode: current device mode
+ * @calib0: calibration value
+ * @calib1: calibration value
+ */
+struct rzg3s_thermal_priv {
+	void __iomem *base;
+	struct device *dev;
+	struct thermal_zone_device *tz;
+	struct reset_control *rstc;
+	struct iio_channel *channel;
+	enum thermal_device_mode mode;
+	u16 calib0;
+	u16 calib1;
+};
+
+static int rzg3s_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+	struct rzg3s_thermal_priv *priv = tz->devdata;
+	int ts_code_ave = 0;
+
+	if (priv->mode != THERMAL_DEVICE_ENABLED)
+		return -EAGAIN;
+
+	for (u8 i = 0; i < TSU_READ_STEPS; i++) {
+		int ret, val;
+
+		ret = iio_read_channel_raw(priv->channel, &val);
+		if (ret < 0)
+			return ret;
+
+		ts_code_ave += val;
+		/*
+		 * According to the HW manual (Rev.1.10, section 40.4.4 Procedure for Measuring
+		 * the Temperature) we need to wait here at leat 3us.
+		 */
+		usleep_range(5, 10);
+	}
+
+	ts_code_ave = DIV_ROUND_CLOSEST(MCELSIUS(ts_code_ave), TSU_READ_STEPS);
+
+	/*
+	 * According to the HW manual (Rev.1.10, section 40.4.4 Procedure for Measuring the
+	 * Temperature) the computation formula is as follows:
+	 *
+	 * Tj = (ts_code_ave - priv->calib1) * 165 / (priv->calib0 - priv->calib1) - 40
+	 *
+	 * Convert everything to milli Celsius before applying the formula to avoid
+	 * losing precision.
+	 */
+
+	*temp = div_s64((s64)(ts_code_ave - MCELSIUS(priv->calib1)) * MCELSIUS(165),
+			MCELSIUS(priv->calib0 - priv->calib1)) - MCELSIUS(40);
+
+	/* Report it in milli degrees Celsius and round it up to 0.5 degrees Celsius. */
+	*temp = roundup(*temp, 500);
+
+	return 0;
+}
+
+static void rzg3s_thermal_set_mode(struct rzg3s_thermal_priv *priv,
+				   enum thermal_device_mode mode)
+{
+	struct device *dev = priv->dev;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return;
+
+	if (mode == THERMAL_DEVICE_DISABLED) {
+		writel(0, priv->base + TSU_SM);
+	} else {
+		writel(TSU_SM_EN, priv->base + TSU_SM);
+		/*
+		 * According to the HW manual (Rev.1.10, section 40.4.1 Procedure for
+		 * Starting the TSU) we need to wait here 30us or more.
+		 */
+		usleep_range(30, 40);
+
+		writel(TSU_SM_OE | TSU_SM_EN, priv->base + TSU_SM);
+		/*
+		 * According to the HW manual (Rev.1.10, section 40.4.1 Procedure for
+		 * Starting the TSU) we need to wait here 50us or more.
+		 */
+		usleep_range(50, 60);
+	}
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+}
+
+static int rzg3s_thermal_change_mode(struct thermal_zone_device *tz,
+				     enum thermal_device_mode mode)
+{
+	struct rzg3s_thermal_priv *priv = tz->devdata;
+
+	if (priv->mode == mode)
+		return 0;
+
+	rzg3s_thermal_set_mode(priv, mode);
+	priv->mode = mode;
+
+	return 0;
+}
+
+static const struct thermal_zone_device_ops rzg3s_tz_of_ops = {
+	.get_temp = rzg3s_thermal_get_temp,
+	.change_mode = rzg3s_thermal_change_mode,
+};
+
+static int rzg3s_thermal_read_calib(struct rzg3s_thermal_priv *priv)
+{
+	struct device *dev = priv->dev;
+	u32 val;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	val = readl(priv->base + OTPTSUTRIM_REG(0));
+	if (val & OTPTSUTRIM_EN_MASK)
+		priv->calib0 = FIELD_GET(OTPTSUTRIM_MASK, val);
+	else
+		priv->calib0 = SW_CALIB0_VAL;
+
+	val = readl(priv->base + OTPTSUTRIM_REG(1));
+	if (val & OTPTSUTRIM_EN_MASK)
+		priv->calib1 = FIELD_GET(OTPTSUTRIM_MASK, val);
+	else
+		priv->calib1 = SW_CALIB1_VAL;
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
+	return 0;
+}
+
+static void rzg3s_thermal_reset_deassert(void *data)
+{
+	reset_control_deassert(data);
+}
+
+static void rzg3s_thermal_rem_hwmon_sysfs(void *data)
+{
+	thermal_remove_hwmon_sysfs(data);
+}
+
+static int rzg3s_thermal_probe(struct platform_device *pdev)
+{
+	struct rzg3s_thermal_priv *priv;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	priv->channel = devm_iio_channel_get(dev, "tsu");
+	if (IS_ERR(priv->channel))
+		return dev_err_probe(dev, PTR_ERR(priv->channel), "Failed to get IIO channel!\n");
+
+	priv->rstc = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(priv->rstc))
+		return dev_err_probe(dev, PTR_ERR(priv->rstc), "Failed to get reset!\n");
+
+	ret = reset_control_deassert(priv->rstc);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(dev, rzg3s_thermal_reset_deassert, priv->rstc);
+	if (ret)
+		return ret;
+
+	priv->dev = dev;
+	priv->mode = THERMAL_DEVICE_DISABLED;
+	platform_set_drvdata(pdev, priv);
+
+	pm_runtime_set_autosuspend_delay(dev, 300);
+	pm_runtime_use_autosuspend(dev);
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable runtime PM!\n");
+
+	ret = rzg3s_thermal_read_calib(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to read calibration data!\n");
+
+	priv->tz = devm_thermal_of_zone_register(dev, 0, priv, &rzg3s_tz_of_ops);
+	if (IS_ERR(priv->tz))
+		return dev_err_probe(dev, PTR_ERR(priv->tz), "Failed to register thermal zone!\n");
+
+	ret = thermal_add_hwmon_sysfs(priv->tz);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add hwmon sysfs!\n");
+
+	return devm_add_action_or_reset(dev, rzg3s_thermal_rem_hwmon_sysfs, priv->tz);
+}
+
+static int rzg3s_thermal_suspend(struct device *dev)
+{
+	struct rzg3s_thermal_priv *priv = dev_get_drvdata(dev);
+
+	rzg3s_thermal_set_mode(priv, THERMAL_DEVICE_DISABLED);
+
+	return reset_control_assert(priv->rstc);
+}
+
+static int rzg3s_thermal_resume(struct device *dev)
+{
+	struct rzg3s_thermal_priv *priv = dev_get_drvdata(dev);
+	int ret;
+
+	ret = reset_control_deassert(priv->rstc);
+	if (ret)
+		return ret;
+
+	if (priv->mode != THERMAL_DEVICE_DISABLED)
+		rzg3s_thermal_set_mode(priv, priv->mode);
+
+	return 0;
+}
+
+static const struct dev_pm_ops rzg3s_thermal_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(rzg3s_thermal_suspend, rzg3s_thermal_resume)
+};
+
+static const struct of_device_id rzg3s_thermal_dt_ids[] = {
+	{ .compatible = "renesas,r9a08g045-tsu" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rzg3s_thermal_dt_ids);
+
+static struct platform_driver rzg3s_thermal_driver = {
+	.driver = {
+		.name = "rzg3s-thermal",
+		.of_match_table = rzg3s_thermal_dt_ids,
+		.pm = pm_ptr(&rzg3s_thermal_pm_ops),
+	},
+	.probe = rzg3s_thermal_probe,
+};
+module_platform_driver(rzg3s_thermal_driver);
+
+MODULE_DESCRIPTION("Renesas RZ/G3S Thermal Sensor Unit Driver");
+MODULE_AUTHOR("Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>");
+MODULE_LICENSE("GPL");
-- 
2.43.0

[PATCH 6.1.y-cip 5/7] arm64: dts: renesas: r9a08g045: Add OPP table

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit b6f4b126b2471211f35720d8e976b65044e13020 upstream.

Add OPP table for the Renesas RZ/G3S SoC.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250128145616.2691841-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a08g045.dtsi | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
index 55ee6195bacc..854b7a1d4eb2 100644
--- a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
@@ -28,6 +28,33 @@ audio_clk2: audio2-clk {
 		clock-frequency = <0>;
 	};
 
+	cluster0_opp: opp-table-0 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-137500000 {
+			opp-hz = /bits/ 64 <137500000>;
+			opp-microvolt = <940000>;
+			clock-latency-ns = <300000>;
+		};
+		opp-275000000 {
+			opp-hz = /bits/ 64 <275000000>;
+			opp-microvolt = <940000>;
+			clock-latency-ns = <300000>;
+		};
+		opp-550000000 {
+			opp-hz = /bits/ 64 <550000000>;
+			opp-microvolt = <940000>;
+			clock-latency-ns = <300000>;
+		};
+		opp-1100000000 {
+			opp-hz = /bits/ 64 <1100000000>;
+			opp-microvolt = <940000>;
+			clock-latency-ns = <300000>;
+			opp-suspend;
+		};
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -40,6 +67,7 @@ cpu0: cpu@0 {
 			next-level-cache = <&L3_CA55>;
 			enable-method = "psci";
 			clocks = <&cpg CPG_CORE R9A08G045_CLK_I>;
+			operating-points-v2 = <&cluster0_opp>;
 		};
 
 		L3_CA55: cache-controller-0 {
-- 
2.43.0

[PATCH 6.1.y-cip 6/7] arm64: dts: renesas: r9a08g045: Add TSU node

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit ee9bfab464247edd9a3f0f65e7ed96053e4b1095 upstream.

Add TSU node along with thermal zones and keep it enabled in the SoC DTSI.
The temperature reported by the TSU can only be read through channel 8 of
the ADC. Therefore, enable the ADC by default.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20250810122125.792966-4-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[claudiu.beznea: fixed conflict around the i3c node as this is not yet in
 v6.1 CIP]
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a08g045.dtsi    | 49 ++++++++++++++++++-
 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     |  4 --
 2 files changed, 48 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
index 854b7a1d4eb2..b9255a7d52c6 100644
--- a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
@@ -233,7 +233,6 @@ adc: adc@10058000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			#io-channel-cells = <1>;
-			status = "disabled";
 
 			channel@0 {
 				reg = <0>;
@@ -272,6 +271,17 @@ channel@8 {
 			};
 		};
 
+		tsu: thermal@10059000 {
+			compatible = "renesas,r9a08g045-tsu";
+			reg = <0 0x10059000 0 0x1000>;
+			clocks = <&cpg CPG_MOD R9A08G045_TSU_PCLK>;
+			resets = <&cpg R9A08G045_TSU_PRESETN>;
+			power-domains = <&cpg>;
+			#thermal-sensor-cells = <0>;
+			io-channels = <&adc 8>;
+			io-channel-names = "tsu";
+		};
+
 		vbattb: clock-controller@1005c000 {
 			compatible = "renesas,r9a08g045-vbattb";
 			reg = <0 0x1005c000 0 0x1000>;
@@ -714,6 +724,43 @@ timer {
 				      <&gic GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
 	};
 
+	thermal-zones {
+		cpu_thermal: cpu-thermal {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+			thermal-sensors = <&tsu>;
+			sustainable-power = <423>;
+
+			cooling-maps {
+				map0 {
+					trip = <&cpu_alert0>;
+					cooling-device = <&cpu0 0 2>;
+					contribution = <1024>;
+				};
+			};
+
+			trips {
+				cpu_crit: cpu-critical {
+					temperature = <110000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+
+				cpu_alert1: trip-point1 {
+					temperature = <90000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+
+				cpu_alert0: trip-point0 {
+					temperature = <85000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+			};
+		};
+	};
+
 	vbattb_xtal: vbattb-xtal {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index 3d707c9c6e46..7c40532fc869 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -84,10 +84,6 @@ x3_clk: x3-clock {
 	};
 };
 
-&adc {
-	status = "okay";
-};
-
 #if SW_CONFIG3 == SW_ON
 &eth0 {
 	pinctrl-0 = <&eth0_pins>;
-- 
2.43.0

[PATCH 6.1.y-cip 7/7] arm64: defconfig: Enable Renesas RZ/G3S thermal driver

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit 823062d153851a944e61768014d7458d609fa4ca upstream.

Enable the CONFIG_RZG3S_THERMAL flag for the RZ/G3S SoC.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20250810122125.792966-5-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 4c1305008789..212345c2b54d 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -609,6 +609,7 @@ CONFIG_ROCKCHIP_THERMAL=m
 CONFIG_RCAR_THERMAL=y
 CONFIG_RCAR_GEN3_THERMAL=y
 CONFIG_RZG2L_THERMAL=y
+CONFIG_RZG3S_THERMAL=m
 CONFIG_ARMADA_THERMAL=y
 CONFIG_BCM2711_THERMAL=m
 CONFIG_BCM2835_THERMAL=m
-- 
2.43.0

Re: [PATCH 6.1.y-cip 0/7] RZ/G3S: Backport TSU support

[Pavel Machek]

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Hi!

> Series backports the TSU (Thermal Sensor Unit) support for RZ/G3S.

Thank you, applied and pushed out.

Best regards,
								Pavel
-- 
In cooperation with Nabla.

[-- Attachment #2: signature.asc --]
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