[PATCH v5 0/4] Update the thermal support for imx93

[PATCH v5 0/4] Update the thermal support for imx93

[Jacky Bai]

The TMU (Thermal Monitoring Unit) on the i.MX93 requires specific
configurations and workarounds that differ from previous implementations.
So, using the 'fsl,qoriq-tmu' compatible string is not appropriate.
To address this, a dedicated compatible string and corresponding driver
changes need to be introduced to properly support the i.MX93 TMU.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
Changes in v5:
- Drop the unnecessary macro defines in patch 2/3
- Add the drvdata info for each of the platform as suggested by Daniel
- Link to v4: https://lore.kernel.org/r/20250821-imx93_tmu-v4-0-6cf5688bf016@nxp.com

Changes in v4:
- Include bitfield.h to fix the build error for RISC-V
- Use macro to define temp rate threshold related settings
- Link to v3: https://lore.kernel.org/r/20250818-imx93_tmu-v3-0-35f79a86c072@nxp.com

---
Jacky Bai (4):
      dt-bindings: thermal: qoriq: Add compatible string for imx93
      thermal: qoriq: add i.MX93 tmu support
      thermal: qoriq: workaround unexpected temperature readings from tmu
      arm64: dts: imx93: update the tmu compatible string

 .../devicetree/bindings/thermal/qoriq-thermal.yaml |  1 +
 arch/arm64/boot/dts/freescale/imx93.dtsi           |  2 +-
 drivers/thermal/qoriq_thermal.c                    | 82 ++++++++++++++++++++--
 3 files changed, 80 insertions(+), 5 deletions(-)
---
base-commit: c7275b05bc428c7373d97aa2da02d3a7fa6b9f66
change-id: 20250804-imx93_tmu-7888c85d176e

Best regards,
-- 
Jacky Bai <ping.bai@nxp.com>

[PATCH v5 1/4] dt-bindings: thermal: qoriq: Add compatible string for imx93

[Jacky Bai]

Add i.MX93 compatible string 'fsl,imx93-tmu' because Thermal monitor
unit(TMU) on i.MX93 has differences with QorIQ platform and not fully
compatible with existing Platform, such as fsl,qoriq-tmu.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
 - v5 changes:
  - no

 - v4 changes:
  - no

 - v3 changes:
  - refine the commit log
  - drop the compatible fallback support

 - v2 changes:
  - keep the enum
  - refine the commit log to use i.MX93 and QorIQ name
---
 Documentation/devicetree/bindings/thermal/qoriq-thermal.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/thermal/qoriq-thermal.yaml b/Documentation/devicetree/bindings/thermal/qoriq-thermal.yaml
index aa756dae512a2c6e3f0b6bb1ab4a65c01e373ea7..f3b136f5e1cba1fff7e90678d7e3d7ec3ddd25c1 100644
--- a/Documentation/devicetree/bindings/thermal/qoriq-thermal.yaml
+++ b/Documentation/devicetree/bindings/thermal/qoriq-thermal.yaml
@@ -25,6 +25,7 @@ properties:
     enum:
       - fsl,qoriq-tmu
       - fsl,imx8mq-tmu
+      - fsl,imx93-tmu
 
   reg:
     maxItems: 1

-- 
2.34.1

[PATCH v5 2/4] thermal: qoriq: add i.MX93 tmu support

[Jacky Bai]

For Thermal monitor unit(TMU) used on i.MX93, the HW revision info read
from the ID register is the same the one used on some of the QorIQ
platform, but the config has some slight differance. Add i.MX93 compatible
string and corresponding code for it.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
 - v5 changes:
  - drop the unnecessary GET_TEUMR0 helper macro
  - add drvdata for each of the platforms

 - v4 changes:
  - no

 - v3 changes:
  - use the drv data struct for match data and refine the code
  - update the copyright

 - v2 changes:
  - use the compatible match data to identify the i.MX93 TMU variant
---
 drivers/thermal/qoriq_thermal.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 01b58be0dcc64d14ca5e4bba654eed8f15e827fc..297a855311f3d6a8d527794abe17ac86c47bf152 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 //
 // Copyright 2016 Freescale Semiconductor, Inc.
+// Copyright 2025 NXP
 
 #include <linux/clk.h>
 #include <linux/err.h>
@@ -24,6 +25,7 @@
 #define TMTMIR_DEFAULT	0x0000000f
 #define TIER_DISABLE	0x0
 #define TEUMR0_V2		0x51009c00
+#define TEUMR0_V21		0x55000c00
 #define TMSARA_V2		0xe
 #define TMU_VER1		0x1
 #define TMU_VER2		0x2
@@ -73,12 +75,17 @@ struct qoriq_sensor {
 	int				id;
 };
 
+struct tmu_drvdata {
+	u32 teumr0;
+};
+
 struct qoriq_tmu_data {
 	int ver;
 	u32 ttrcr[NUM_TTRCR_MAX];
 	struct regmap *regmap;
 	struct clk *clk;
 	struct qoriq_sensor	sensor[SITES_MAX];
+	const struct tmu_drvdata *drvdata;
 };
 
 static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s)
@@ -225,6 +232,8 @@ static int qoriq_tmu_calibration(struct device *dev,
 
 static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
 {
+	u32 teumr0_val;
+
 	/* Disable interrupt, using polling instead */
 	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
 
@@ -234,7 +243,8 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
 		regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
 	} else {
 		regmap_write(data->regmap, REGS_V2_TMTMIR, TMTMIR_DEFAULT);
-		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
+		teumr0_val = data->drvdata->teumr0;
+		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
 	}
 
 	/* Disable monitoring */
@@ -319,6 +329,10 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
 
 	data->ver = (ver >> 8) & 0xff;
 
+	data->drvdata = of_device_get_match_data(&pdev->dev);
+	if (!data->drvdata)
+		return dev_err_probe(dev, -EINVAL, "Failed to get match data\n");
+
 	qoriq_tmu_init_device(data);	/* TMU initialization */
 
 	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
@@ -376,9 +390,22 @@ static int qoriq_tmu_resume(struct device *dev)
 static DEFINE_SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
 				qoriq_tmu_suspend, qoriq_tmu_resume);
 
+static const struct tmu_drvdata qoriq_tmu_data = {
+	.teumr0 = TEUMR0_V2,
+};
+
+static const struct tmu_drvdata imx8mq_tmu_data = {
+	.teumr0 = TEUMR0_V2,
+};
+
+static const struct tmu_drvdata imx93_data = {
+	.teumr0 = TEUMR0_V21,
+};
+
 static const struct of_device_id qoriq_tmu_match[] = {
-	{ .compatible = "fsl,qoriq-tmu", },
-	{ .compatible = "fsl,imx8mq-tmu", },
+	{ .compatible = "fsl,qoriq-tmu", .data = &qoriq_tmu_data },
+	{ .compatible = "fsl,imx8mq-tmu", .data = &imx8mq_tmu_data },
+	{ .compatible = "fsl,imx93-tmu", .data = &imx93_data },
 	{},
 };
 MODULE_DEVICE_TABLE(of, qoriq_tmu_match);

-- 
2.34.1

Re: [PATCH v5 2/4] thermal: qoriq: add i.MX93 tmu support

[Daniel Baluta]

On 4/21/26 10:42, Jacky Bai wrote:
> For Thermal monitor unit(TMU) used on i.MX93, the HW revision info read
> from the ID register is the same the one used on some of the QorIQ
> platform, but the config has some slight differance. Add i.MX93 compatible
> string and corresponding code for it.
> 
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> Signed-off-by: Jacky Bai <ping.bai@nxp.com>
> ---
>  - v5 changes:
>   - drop the unnecessary GET_TEUMR0 helper macro
>   - add drvdata for each of the platforms
> 
>  - v4 changes:
>   - no
> 
>  - v3 changes:
>   - use the drv data struct for match data and refine the code
>   - update the copyright
> 
>  - v2 changes:
>   - use the compatible match data to identify the i.MX93 TMU variant
> ---
>  drivers/thermal/qoriq_thermal.c | 33 ++++++++++++++++++++++++++++++---
>  1 file changed, 30 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
> index 01b58be0dcc64d14ca5e4bba654eed8f15e827fc..297a855311f3d6a8d527794abe17ac86c47bf152 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -1,6 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0
>  //
>  // Copyright 2016 Freescale Semiconductor, Inc.
> +// Copyright 2025 NXP
>  
>  #include <linux/clk.h>
>  #include <linux/err.h>
> @@ -24,6 +25,7 @@
>  #define TMTMIR_DEFAULT	0x0000000f
>  #define TIER_DISABLE	0x0
>  #define TEUMR0_V2		0x51009c00
> +#define TEUMR0_V21		0x55000c00
>  #define TMSARA_V2		0xe
>  #define TMU_VER1		0x1
>  #define TMU_VER2		0x2
> @@ -73,12 +75,17 @@ struct qoriq_sensor {
>  	int				id;
>  };
>  
> +struct tmu_drvdata {
> +	u32 teumr0;
> +};
> +
>  struct qoriq_tmu_data {
>  	int ver;
>  	u32 ttrcr[NUM_TTRCR_MAX];
>  	struct regmap *regmap;
>  	struct clk *clk;
>  	struct qoriq_sensor	sensor[SITES_MAX];
> +	const struct tmu_drvdata *drvdata;
>  };
>  
>  static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s)
> @@ -225,6 +232,8 @@ static int qoriq_tmu_calibration(struct device *dev,
>  
>  static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
>  {
> +	u32 teumr0_val;

No need for this here you can just use directly: data->drvdata->teumr0

> +
>  	/* Disable interrupt, using polling instead */
>  	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
>  
> @@ -234,7 +243,8 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
>  		regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
>  	} else {
>  		regmap_write(data->regmap, REGS_V2_TMTMIR, TMTMIR_DEFAULT);
> -		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
> +		teumr0_val = data->drvdata->teumr0;
> +		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
>  	}

RE: [PATCH v5 2/4] thermal: qoriq: add i.MX93 tmu support

[Jacky Bai]

> Subject: Re: [PATCH v5 2/4] thermal: qoriq: add i.MX93 tmu support
> 

[...]

> >  static struct qoriq_tmu_data *qoriq_sensor_to_data(struct
> > qoriq_sensor *s) @@ -225,6 +232,8 @@ static int
> > qoriq_tmu_calibration(struct device *dev,
> >
> >  static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)  {
> > +	u32 teumr0_val;
> 
> No need for this here you can just use directly: data->drvdata->teumr0
> 

Thx, will resolve it in next version.

BR

> > +
> >  	/* Disable interrupt, using polling instead */
> >  	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
> >
> > @@ -234,7 +243,8 @@ static void qoriq_tmu_init_device(struct
> qoriq_tmu_data *data)
> >  		regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
> >  	} else {
> >  		regmap_write(data->regmap, REGS_V2_TMTMIR,
> TMTMIR_DEFAULT);
> > -		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
> > +		teumr0_val = data->drvdata->teumr0;
> > +		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
> >  	}
> 

[PATCH v5 3/4] thermal: qoriq: workaround unexpected temperature readings from tmu

[Jacky Bai]

Invalid temperature measurements may be observed across the temperature
range specified in the device data sheet. The invalid temperature can
be read from any remote site and from any capture or report registers.
The invalid change in temperature can be positive or negative and the
resulting temperature can be outside the calibrated range, in which
case the TSR[ORL] or TSR[ORH] bit will be set.

Workaround:
Use the raising/falling edge threshold to filter out the invalid temp.
Check the TIDR register to make sure no jump happens When reading the temp.

i.MX93 ERR052243:
(https://www.nxp.com/webapp/Download?colCode=IMX93_2P87F&appType=license)

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
 - v5 changes:
  - replace the check errata macro with inline function

 - v4 changes:
  - include bitfield.h to fix compilation errors for RISC-V
  - use macro define for temp rate related setting

 - v3 changes:
  - refine the code with FIELD_PREP macro
  - add errata doc url link and refine the commit log

 - v2 changes:
  - no
---
 drivers/thermal/qoriq_thermal.c | 49 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 297a855311f3d6a8d527794abe17ac86c47bf152..57c712b9b359d713f2ff4926eb890a0641aa96bd 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -3,6 +3,7 @@
 // Copyright 2016 Freescale Semiconductor, Inc.
 // Copyright 2025 NXP
 
+#include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
@@ -30,6 +31,9 @@
 #define TMU_VER1		0x1
 #define TMU_VER2		0x2
 
+/* errata ID info define */
+#define TMU_ERR052243	BIT(0)
+
 #define REGS_TMR	0x000	/* Mode Register */
 #define TMR_DISABLE	0x0
 #define TMR_ME		0x80000000
@@ -45,6 +49,15 @@
 #define REGS_TIER	0x020	/* Interrupt Enable Register */
 #define TIER_DISABLE	0x0
 
+#define REGS_TIDR	0x24
+#define TEMP_RATE_IRQ_MASK	GENMASK(25, 24)
+#define TMRTRCTR	0x70
+#define TMRTRCTR_EN	BIT(31)
+#define TMRTRCTR_TEMP_MASK	GENMASK(7, 0)
+#define TMFTRCTR	0x74
+#define TMFTRCTR_EN	BIT(31)
+#define TMFTRCTR_TEMP_MASK	GENMASK(7, 0)
+#define TEMP_RATE_THR_LVL	0x7
 
 #define REGS_TTCFGR	0x080	/* Temperature Configuration Register */
 #define REGS_TSCFGR	0x084	/* Sensor Configuration Register */
@@ -77,6 +90,7 @@ struct qoriq_sensor {
 
 struct tmu_drvdata {
 	u32 teumr0;
+	u32 tmu_errata;
 };
 
 struct qoriq_tmu_data {
@@ -88,6 +102,12 @@ struct qoriq_tmu_data {
 	const struct tmu_drvdata *drvdata;
 };
 
+static inline bool qoriq_tmu_has_errata(const struct tmu_drvdata *drvdata,
+					u32 flag)
+{
+	return drvdata->tmu_errata & flag;
+}
+
 static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s)
 {
 	return container_of(s, struct qoriq_tmu_data, sensor[s->id]);
@@ -97,7 +117,7 @@ static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
 {
 	struct qoriq_sensor *qsensor = thermal_zone_device_priv(tz);
 	struct qoriq_tmu_data *qdata = qoriq_sensor_to_data(qsensor);
-	u32 val;
+	u32 val, tidr;
 	/*
 	 * REGS_TRITSR(id) has the following layout:
 	 *
@@ -122,6 +142,15 @@ static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
 	if (!(val & TMR_ME))
 		return -EAGAIN;
 
+	/* ERR052243: If a raising or falling edge happens, try later */
+	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
+		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
+		if (tidr & TEMP_RATE_IRQ_MASK) {
+			regmap_write(qdata->regmap, REGS_TIDR, TEMP_RATE_IRQ_MASK);
+			return -EAGAIN;
+		}
+	}
+
 	if (regmap_read_poll_timeout(qdata->regmap,
 				     REGS_TRITSR(qsensor->id),
 				     val,
@@ -130,6 +159,15 @@ static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
 				     10 * USEC_PER_MSEC))
 		return -ENODATA;
 
+	/*ERR052243: If a raising or falling edge happens, try later */
+	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
+		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
+		if (tidr & TEMP_RATE_IRQ_MASK) {
+			regmap_write(qdata->regmap, REGS_TIDR, TEMP_RATE_IRQ_MASK);
+			return -EAGAIN;
+		}
+	}
+
 	if (qdata->ver == TMU_VER1) {
 		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
 	} else {
@@ -247,6 +285,14 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
 		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
 	}
 
+	/* ERR052243: Set the raising & falling edge monitor */
+	if (qoriq_tmu_has_errata(data->drvdata, TMU_ERR052243)) {
+		regmap_write(data->regmap, TMRTRCTR, TMRTRCTR_EN |
+			     FIELD_PREP(TMRTRCTR_TEMP_MASK, TEMP_RATE_THR_LVL));
+		regmap_write(data->regmap, TMFTRCTR, TMFTRCTR_EN |
+			     FIELD_PREP(TMFTRCTR_TEMP_MASK, TEMP_RATE_THR_LVL));
+
+	}
 	/* Disable monitoring */
 	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
 }
@@ -400,6 +446,7 @@ static const struct tmu_drvdata imx8mq_tmu_data = {
 
 static const struct tmu_drvdata imx93_data = {
 	.teumr0 = TEUMR0_V21,
+	.tmu_errata = TMU_ERR052243,
 };
 
 static const struct of_device_id qoriq_tmu_match[] = {

-- 
2.34.1

Re: [PATCH v5 3/4] thermal: qoriq: workaround unexpected temperature readings from tmu

[Frank Li]

On Tue, Apr 21, 2026 at 03:42:24PM +0800, Jacky Bai wrote:
> Invalid temperature measurements may be observed across the temperature
> range specified in the device data sheet. The invalid temperature can
> be read from any remote site and from any capture or report registers.
> The invalid change in temperature can be positive or negative and the
> resulting temperature can be outside the calibrated range, in which
> case the TSR[ORL] or TSR[ORH] bit will be set.
>
> Workaround:
> Use the raising/falling edge threshold to filter out the invalid temp.
> Check the TIDR register to make sure no jump happens When reading the temp.
>
> i.MX93 ERR052243:
> (https://www.nxp.com/webapp/Download?colCode=IMX93_2P87F&appType=license)
>
> Signed-off-by: Jacky Bai <ping.bai@nxp.com>
> ---
>  - v5 changes:
>   - replace the check errata macro with inline function
>
>  - v4 changes:
>   - include bitfield.h to fix compilation errors for RISC-V
>   - use macro define for temp rate related setting
>
>  - v3 changes:
>   - refine the code with FIELD_PREP macro
>   - add errata doc url link and refine the commit log
>
>  - v2 changes:
>   - no
> ---
>  drivers/thermal/qoriq_thermal.c | 49 ++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 48 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
> index 297a855311f3d6a8d527794abe17ac86c47bf152..57c712b9b359d713f2ff4926eb890a0641aa96bd 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -3,6 +3,7 @@
>  // Copyright 2016 Freescale Semiconductor, Inc.
>  // Copyright 2025 NXP
>
> +#include <linux/bitfield.h>
>  #include <linux/clk.h>
>  #include <linux/err.h>
>  #include <linux/io.h>
> @@ -30,6 +31,9 @@
>  #define TMU_VER1		0x1
>  #define TMU_VER2		0x2
>
> +/* errata ID info define */
> +#define TMU_ERR052243	BIT(0)
> +
>  #define REGS_TMR	0x000	/* Mode Register */
>  #define TMR_DISABLE	0x0
>  #define TMR_ME		0x80000000
> @@ -45,6 +49,15 @@
>  #define REGS_TIER	0x020	/* Interrupt Enable Register */
>  #define TIER_DISABLE	0x0
>
> +#define REGS_TIDR	0x24
> +#define TEMP_RATE_IRQ_MASK	GENMASK(25, 24)
> +#define TMRTRCTR	0x70
> +#define TMRTRCTR_EN	BIT(31)
> +#define TMRTRCTR_TEMP_MASK	GENMASK(7, 0)
> +#define TMFTRCTR	0x74
> +#define TMFTRCTR_EN	BIT(31)
> +#define TMFTRCTR_TEMP_MASK	GENMASK(7, 0)
> +#define TEMP_RATE_THR_LVL	0x7
>
>  #define REGS_TTCFGR	0x080	/* Temperature Configuration Register */
>  #define REGS_TSCFGR	0x084	/* Sensor Configuration Register */
> @@ -77,6 +90,7 @@ struct qoriq_sensor {
>
>  struct tmu_drvdata {
>  	u32 teumr0;
> +	u32 tmu_errata;
>  };
>
>  struct qoriq_tmu_data {
> @@ -88,6 +102,12 @@ struct qoriq_tmu_data {
>  	const struct tmu_drvdata *drvdata;
>  };
>
> +static inline bool qoriq_tmu_has_errata(const struct tmu_drvdata *drvdata,
> +					u32 flag)
> +{
> +	return drvdata->tmu_errata & flag;
> +}
> +
>  static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s)
>  {
>  	return container_of(s, struct qoriq_tmu_data, sensor[s->id]);
> @@ -97,7 +117,7 @@ static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
>  {
>  	struct qoriq_sensor *qsensor = thermal_zone_device_priv(tz);
>  	struct qoriq_tmu_data *qdata = qoriq_sensor_to_data(qsensor);
> -	u32 val;
> +	u32 val, tidr;
>  	/*
>  	 * REGS_TRITSR(id) has the following layout:
>  	 *
> @@ -122,6 +142,15 @@ static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
>  	if (!(val & TMR_ME))
>  		return -EAGAIN;
>
> +	/* ERR052243: If a raising or falling edge happens, try later */
> +	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
> +		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
> +		if (tidr & TEMP_RATE_IRQ_MASK) {
> +			regmap_write(qdata->regmap, REGS_TIDR, TEMP_RATE_IRQ_MASK);
> +			return -EAGAIN;
> +		}
> +	}
> +
>  	if (regmap_read_poll_timeout(qdata->regmap,
>  				     REGS_TRITSR(qsensor->id),
>  				     val,
> @@ -130,6 +159,15 @@ static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
>  				     10 * USEC_PER_MSEC))
>  		return -ENODATA;
>
> +	/*ERR052243: If a raising or falling edge happens, try later */
> +	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
> +		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
> +		if (tidr & TEMP_RATE_IRQ_MASK) {
> +			regmap_write(qdata->regmap, REGS_TIDR, TEMP_RATE_IRQ_MASK);
> +			return -EAGAIN;
> +		}
> +	}
> +

The above two code blocks are the same. Use helper function to avoid
duplicat code. And why need check twice?

	ret = qoriq_tmu_err052243()
	if (ret)
		return ret;

Frank

>  	if (qdata->ver == TMU_VER1) {
>  		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
>  	} else {
> @@ -247,6 +285,14 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
>  		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
>  	}
>
> +	/* ERR052243: Set the raising & falling edge monitor */
> +	if (qoriq_tmu_has_errata(data->drvdata, TMU_ERR052243)) {
> +		regmap_write(data->regmap, TMRTRCTR, TMRTRCTR_EN |
> +			     FIELD_PREP(TMRTRCTR_TEMP_MASK, TEMP_RATE_THR_LVL));
> +		regmap_write(data->regmap, TMFTRCTR, TMFTRCTR_EN |
> +			     FIELD_PREP(TMFTRCTR_TEMP_MASK, TEMP_RATE_THR_LVL));
> +
> +	}
>  	/* Disable monitoring */
>  	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
>  }
> @@ -400,6 +446,7 @@ static const struct tmu_drvdata imx8mq_tmu_data = {
>
>  static const struct tmu_drvdata imx93_data = {
>  	.teumr0 = TEUMR0_V21,
> +	.tmu_errata = TMU_ERR052243,
>  };
>
>  static const struct of_device_id qoriq_tmu_match[] = {
>
> --
> 2.34.1
>

RE: [PATCH v5 3/4] thermal: qoriq: workaround unexpected temperature readings from tmu

[Jacky Bai]

> Subject: Re: [PATCH v5 3/4] thermal: qoriq: workaround unexpected
> temperature readings from tmu
> 

[...]

> >
> > +	/* ERR052243: If a raising or falling edge happens, try later */
> > +	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
> > +		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
> > +		if (tidr & TEMP_RATE_IRQ_MASK) {
> > +			regmap_write(qdata->regmap, REGS_TIDR,
> TEMP_RATE_IRQ_MASK);
> > +			return -EAGAIN;
> > +		}
> > +	}
> > +
> >  	if (regmap_read_poll_timeout(qdata->regmap,
> >  				     REGS_TRITSR(qsensor->id),
> >  				     val,
> > @@ -130,6 +159,15 @@ static int tmu_get_temp(struct
> thermal_zone_device *tz, int *temp)
> >  				     10 * USEC_PER_MSEC))
> >  		return -ENODATA;
> >
> > +	/*ERR052243: If a raising or falling edge happens, try later */
> > +	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
> > +		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
> > +		if (tidr & TEMP_RATE_IRQ_MASK) {
> > +			regmap_write(qdata->regmap, REGS_TIDR,
> TEMP_RATE_IRQ_MASK);
> > +			return -EAGAIN;
> > +		}
> > +	}
> > +
> 
> The above two code blocks are the same. Use helper function to avoid
> duplicat code. And why need check twice?
> 
> 	ret = qoriq_tmu_err052243()
> 	if (ret)
> 		return ret;
> 

The first check is to make sure no error already happened. if any error, no need
to polling read the sensor value from tmu, return early to save time. The secondary
check is to make sure the sensor value just read out is still a valid one as the error may
happen after the first check.

It should be ok to remove the first check. As the error only happens in some rare
corner case, the sensor read polling delay is acceptable.

If only keep the secondary check, I think no need to wrap this code block into a helper function?

BR

> Frank
> 
> >  	if (qdata->ver == TMU_VER1) {
> >  		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
> >  	} else {
> > @@ -247,6 +285,14 @@ static void qoriq_tmu_init_device(struct
> qoriq_tmu_data *data)
> >  		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
> >  	}
> >
> > +	/* ERR052243: Set the raising & falling edge monitor */
> > +	if (qoriq_tmu_has_errata(data->drvdata, TMU_ERR052243)) {
> > +		regmap_write(data->regmap, TMRTRCTR, TMRTRCTR_EN |
> > +			     FIELD_PREP(TMRTRCTR_TEMP_MASK,
> TEMP_RATE_THR_LVL));
> > +		regmap_write(data->regmap, TMFTRCTR, TMFTRCTR_EN |
> > +			     FIELD_PREP(TMFTRCTR_TEMP_MASK,
> TEMP_RATE_THR_LVL));
> > +
> > +	}
> >  	/* Disable monitoring */
> >  	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);  } @@
> -400,6
> > +446,7 @@ static const struct tmu_drvdata imx8mq_tmu_data = {
> >
> >  static const struct tmu_drvdata imx93_data = {
> >  	.teumr0 = TEUMR0_V21,
> > +	.tmu_errata = TMU_ERR052243,
> >  };
> >
> >  static const struct of_device_id qoriq_tmu_match[] = {
> >
> > --
> > 2.34.1
> >

Re: [PATCH v5 3/4] thermal: qoriq: workaround unexpected temperature readings from tmu

[Frank Li]

On Tue, Apr 21, 2026 at 09:56:18AM +0000, Jacky Bai wrote:
> > Subject: Re: [PATCH v5 3/4] thermal: qoriq: workaround unexpected
> > temperature readings from tmu
> >
>
> [...]
>
> > >
> > > +	/* ERR052243: If a raising or falling edge happens, try later */
> > > +	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
> > > +		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
> > > +		if (tidr & TEMP_RATE_IRQ_MASK) {
> > > +			regmap_write(qdata->regmap, REGS_TIDR,
> > TEMP_RATE_IRQ_MASK);
> > > +			return -EAGAIN;
> > > +		}
> > > +	}
> > > +
> > >  	if (regmap_read_poll_timeout(qdata->regmap,
> > >  				     REGS_TRITSR(qsensor->id),
> > >  				     val,
> > > @@ -130,6 +159,15 @@ static int tmu_get_temp(struct
> > thermal_zone_device *tz, int *temp)
> > >  				     10 * USEC_PER_MSEC))
> > >  		return -ENODATA;
> > >
> > > +	/*ERR052243: If a raising or falling edge happens, try later */
> > > +	if (qoriq_tmu_has_errata(qdata->drvdata, TMU_ERR052243)) {
> > > +		regmap_read(qdata->regmap, REGS_TIDR, &tidr);
> > > +		if (tidr & TEMP_RATE_IRQ_MASK) {
> > > +			regmap_write(qdata->regmap, REGS_TIDR,
> > TEMP_RATE_IRQ_MASK);
> > > +			return -EAGAIN;
> > > +		}
> > > +	}
> > > +
> >
> > The above two code blocks are the same. Use helper function to avoid
> > duplicat code. And why need check twice?
> >
> > 	ret = qoriq_tmu_err052243()
> > 	if (ret)
> > 		return ret;
> >
>
> The first check is to make sure no error already happened. if any error, no need
> to polling read the sensor value from tmu, return early to save time. The secondary
> check is to make sure the sensor value just read out is still a valid one as the error may
> happen after the first check.
>
> It should be ok to remove the first check. As the error only happens in some rare
> corner case, the sensor read polling delay is acceptable.
>
> If only keep the secondary check, I think no need to wrap this code block into a helper function?

Yes

Frank

>
> BR
>
> > Frank
> >
> > >  	if (qdata->ver == TMU_VER1) {
> > >  		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
> > >  	} else {
> > > @@ -247,6 +285,14 @@ static void qoriq_tmu_init_device(struct
> > qoriq_tmu_data *data)
> > >  		regmap_write(data->regmap, REGS_V2_TEUMR(0), teumr0_val);
> > >  	}
> > >
> > > +	/* ERR052243: Set the raising & falling edge monitor */
> > > +	if (qoriq_tmu_has_errata(data->drvdata, TMU_ERR052243)) {
> > > +		regmap_write(data->regmap, TMRTRCTR, TMRTRCTR_EN |
> > > +			     FIELD_PREP(TMRTRCTR_TEMP_MASK,
> > TEMP_RATE_THR_LVL));
> > > +		regmap_write(data->regmap, TMFTRCTR, TMFTRCTR_EN |
> > > +			     FIELD_PREP(TMFTRCTR_TEMP_MASK,
> > TEMP_RATE_THR_LVL));
> > > +
> > > +	}
> > >  	/* Disable monitoring */
> > >  	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);  } @@
> > -400,6
> > > +446,7 @@ static const struct tmu_drvdata imx8mq_tmu_data = {
> > >
> > >  static const struct tmu_drvdata imx93_data = {
> > >  	.teumr0 = TEUMR0_V21,
> > > +	.tmu_errata = TMU_ERR052243,
> > >  };
> > >
> > >  static const struct of_device_id qoriq_tmu_match[] = {
> > >
> > > --
> > > 2.34.1
> > >

[PATCH v5 4/4] arm64: dts: imx93: update the tmu compatible string

[Jacky Bai]

The i.MX93 TMU node compatible need to be updated to apply the SoC
specific configuration and TMU errata workaround.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
 - v5 changes:
  - no

 - v4 changes:
  - no

 - v3 changes:
  - drop the qoriq compatible

 - v2 changes:
  - no
---
 arch/arm64/boot/dts/freescale/imx93.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi b/arch/arm64/boot/dts/freescale/imx93.dtsi
index b9abe143cb567e722277960ff677d460154dfc8a..06443d52a4290f9525c320f8bcf5fba1a8435d11 100644
--- a/arch/arm64/boot/dts/freescale/imx93.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
@@ -80,7 +80,7 @@ mu1: mailbox@44230000 {
 	};
 
 	tmu: tmu@44482000 {
-		compatible = "fsl,qoriq-tmu";
+		compatible = "fsl,imx93-tmu";
 		reg = <0x44482000 0x1000>;
 		interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&clk IMX93_CLK_TMC_GATE>;

-- 
2.34.1