[PATCH v8] thermal: mediatek: add another get_temp ops for thermal sensors

[PATCH v8] thermal: mediatek: add another get_temp ops for thermal sensors

[Ben Tseng]

From: Michael Kao <michael.kao@mediatek.com>

Provide thermal zone to read thermal sensor
in the SoC. We can read all the thermal sensors
value in the SoC by the node /sys/class/thermal/

In mtk_thermal_bank_temperature, return -EAGAIN instead of -EACCESS
on the first read of sensor that often are bogus values.
This can avoid following warning on boot:

  thermal thermal_zone6: failed to read out thermal zone (-13)

Signed-off-by: Michael Kao <michael.kao@mediatek.com>
Signed-off-by: Ben Tseng <ben.tseng@mediatek.com>

---

This patchset supports for MT8183 chip to mtk_thermal.c.
Add thermal zone of all the thermal sensor in SoC for
another get temperatrue. They don't need to thermal throttle.
And we bind coolers for thermal zone nodes of cpu_thermal.

Changes in V8:
    - Rebase to kernel-v5.13-rc1
    - Resend

Changes in v7:
    - Fix build error in v6.

Changes in v6:
    - Rebase to kernel-5.11-rc1.
    - [1/3]
        - add interrupts property.
    - [2/3]
        - add the Tested-by in the commit message.
    - [3/3]
        - use the mt->conf->msr[id] instead of conf->msr[id] in the
          _get_sensor_temp and mtk_thermal_bank_temperature.
        - remove the redundant space in _get_sensor_temp and
          mtk_read_sensor_temp.
        - change kmalloc to dev_kmalloc in mtk_thermal_probe.

Changes in v5:
    - Rebase to kernel-5.9-rc1.
    - Revise the title of cover letter.
    - Drop "[v4,7/7] thermal: mediatek: use spinlock to protect PTPCORESEL"
    - [2/2]
        -  Add the judgement to the version of raw_to_mcelsius.

Changes in v4:
    - Rebase to kernel-5.6-rc1.
    - [1/7]
        - Squash thermal zone settings in the dtsi from [v3,5/8]
          arm64: dts: mt8183: Increase polling frequency for CPU thermal zone.
        - Remove the property of interrupts and mediatek,hw-reset-temp.
    - [2/7]
        - Correct commit message.
    - [4/7]
        - Change the target temperature to the 80C and change the commit message.
    - [6/7]
        - Adjust newline alignment.
        - Fix the judgement on the return value of registering thermal zone.

Changes in v3:
    - Rebase to kernel-5.5-rc1.
    - [1/8]
        - Update sustainable power of cpu, tzts1~5 and tztsABB.
    - [7/8]
        - Bypass the failure that non cpu_thermal sensor is not find in thermal-zones
          in dts, which is normal for mt8173, so prompt a warning here instead of
          failing.

	Return -EAGAIN instead of -EACCESS on the first read of sensor that
        often are bogus values. This can avoid following warning on boot:

          thermal thermal_zone6: failed to read out thermal zone (-13)

Changes in v2:
    - [1/8]
        - Add the sustainable-power,trips,cooling-maps to the tzts1~tztsABB.
    - [4/8]
        - Add the min opp of cpu throttle.

Matthias Kaehlcke (1):
  arm64: dts: mt8183: Configure CPU cooling

Michael Kao (2):
  thermal: mediatek: add another get_temp ops for thermal sensors
  arm64: dts: mt8183: add thermal zone node
---
 drivers/thermal/mtk_thermal.c | 100 +++++++++++++++++++++++++++++++-----------
 1 file changed, 75 insertions(+), 25 deletions(-)

diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index 97e8678..b6bee451 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -245,6 +245,11 @@ enum mtk_thermal_version {
 
 struct mtk_thermal;
 
+struct mtk_thermal_zone {
+	struct mtk_thermal *mt;
+	int id;
+};
+
 struct thermal_bank_cfg {
 	unsigned int num_sensors;
 	const int *sensors;
@@ -637,6 +642,30 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
 		mutex_unlock(&mt->lock);
 }
 
+static u32 _get_sensor_temp(struct mtk_thermal *mt, int id)
+{
+	u32 raw;
+	int temp;
+
+	raw = readl(mt->thermal_base + mt->conf->msr[id]);
+
+	if (mt->conf->version == MTK_THERMAL_V1)
+		temp = raw_to_mcelsius_v1(mt, id, raw);
+	else
+		temp = raw_to_mcelsius_v2(mt, id, raw);
+
+	/*
+	 * The first read of a sensor often contains very high bogus
+	 * temperature value. Filter these out so that the system does
+	 * not immediately shut down.
+	 */
+
+	if (temp > 200000)
+		return -EAGAIN;
+	else
+		return temp;
+}
+
 /**
  * mtk_thermal_bank_temperature - get the temperature of a bank
  * @bank:	The bank
@@ -647,28 +676,11 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
 static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
 {
 	struct mtk_thermal *mt = bank->mt;
-	const struct mtk_thermal_data *conf = mt->conf;
 	int i, temp = INT_MIN, max = INT_MIN;
-	u32 raw;
-
-	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
-		raw = readl(mt->thermal_base + conf->msr[i]);
 
-		if (mt->conf->version == MTK_THERMAL_V1) {
-			temp = raw_to_mcelsius_v1(
-				mt, conf->bank_data[bank->id].sensors[i], raw);
-		} else {
-			temp = raw_to_mcelsius_v2(
-				mt, conf->bank_data[bank->id].sensors[i], raw);
-		}
+	for (i = 0; i < mt->conf->bank_data[bank->id].num_sensors; i++) {
 
-		/*
-		 * The first read of a sensor often contains very high bogus
-		 * temperature value. Filter these out so that the system does
-		 * not immediately shut down.
-		 */
-		if (temp > 200000)
-			temp = 0;
+		temp = _get_sensor_temp(mt, i);
 
 		if (temp > max)
 			max = temp;
@@ -679,7 +691,8 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
 
 static int mtk_read_temp(void *data, int *temperature)
 {
-	struct mtk_thermal *mt = data;
+	struct mtk_thermal_zone *tz = data;
+	struct mtk_thermal *mt = tz->mt;
 	int i;
 	int tempmax = INT_MIN;
 
@@ -698,10 +711,28 @@ static int mtk_read_temp(void *data, int *temperature)
 	return 0;
 }
 
+static int mtk_read_sensor_temp(void *data, int *temperature)
+{
+	struct mtk_thermal_zone *tz = data;
+	struct mtk_thermal *mt = tz->mt;
+	int id = tz->id - 1;
+
+	if (id < 0)
+		return -EACCES;
+
+	*temperature = _get_sensor_temp(mt, id);
+
+	return 0;
+}
+
 static const struct thermal_zone_of_device_ops mtk_thermal_ops = {
 	.get_temp = mtk_read_temp,
 };
 
+static const struct thermal_zone_of_device_ops mtk_thermal_sensor_ops = {
+	.get_temp = mtk_read_sensor_temp,
+};
+
 static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
 				  u32 apmixed_phys_base, u32 auxadc_phys_base,
 				  int ctrl_id)
@@ -992,6 +1023,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 	u64 auxadc_phys_base, apmixed_phys_base;
 	struct thermal_zone_device *tzdev;
 	void __iomem *apmixed_base, *auxadc_base;
+	struct mtk_thermal_zone *tz;
 
 	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
 	if (!mt)
@@ -1080,11 +1112,29 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, mt);
 
-	tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, mt,
-						     &mtk_thermal_ops);
-	if (IS_ERR(tzdev)) {
-		ret = PTR_ERR(tzdev);
-		goto err_disable_clk_peri_therm;
+	for (i = 0; i < mt->conf->num_sensors + 1; i++) {
+		tz = devm_kmalloc(&pdev->dev, sizeof(*tz), GFP_KERNEL);
+		if (!tz)
+			return -ENOMEM;
+
+		tz->mt = mt;
+		tz->id = i;
+
+		tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, i, tz, (i == 0) ?
+							     &mtk_thermal_ops :
+							     &mtk_thermal_sensor_ops);
+
+		if (IS_ERR(tzdev)) {
+			if (PTR_ERR(tzdev) == -ENODEV) {
+				dev_warn(&pdev->dev,
+					 "sensor %d not registered in thermal zone in dt\n", i);
+				continue;
+			}
+			if (PTR_ERR(tzdev) == -EACCES) {
+				ret = PTR_ERR(tzdev);
+				goto err_disable_clk_peri_therm;
+			}
+		}
 	}
 
 	return 0;
-- 
1.8.1.1.dirty
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Re: [PATCH v8] thermal: mediatek: add another get_temp ops for thermal sensors

[Daniel Lezcano]

On 03/06/2021 13:00, Ben Tseng wrote:
> From: Michael Kao <michael.kao@mediatek.com>
> 
> Provide thermal zone to read thermal sensor
> in the SoC. We can read all the thermal sensors
> value in the SoC by the node /sys/class/thermal/
> 
> In mtk_thermal_bank_temperature, return -EAGAIN instead of -EACCESS
> on the first read of sensor that often are bogus values.
> This can avoid following warning on boot:
> 
>   thermal thermal_zone6: failed to read out thermal zone (-13)
> 
> Signed-off-by: Michael Kao <michael.kao@mediatek.com>
> Signed-off-by: Ben Tseng <ben.tseng@mediatek.com>
> 
> ---
> 
> This patchset supports for MT8183 chip to mtk_thermal.c.
> Add thermal zone of all the thermal sensor in SoC for
> another get temperatrue. They don't need to thermal throttle.
> And we bind coolers for thermal zone nodes of cpu_thermal.
> 
> Changes in V8:
>     - Rebase to kernel-v5.13-rc1
>     - Resend
> 
> Changes in v7:
>     - Fix build error in v6.
> 
> Changes in v6:
>     - Rebase to kernel-5.11-rc1.
>     - [1/3]
>         - add interrupts property.
>     - [2/3]
>         - add the Tested-by in the commit message.
>     - [3/3]
>         - use the mt->conf->msr[id] instead of conf->msr[id] in the
>           _get_sensor_temp and mtk_thermal_bank_temperature.
>         - remove the redundant space in _get_sensor_temp and
>           mtk_read_sensor_temp.
>         - change kmalloc to dev_kmalloc in mtk_thermal_probe.
> 
> Changes in v5:
>     - Rebase to kernel-5.9-rc1.
>     - Revise the title of cover letter.
>     - Drop "[v4,7/7] thermal: mediatek: use spinlock to protect PTPCORESEL"
>     - [2/2]
>         -  Add the judgement to the version of raw_to_mcelsius.
> 
> Changes in v4:
>     - Rebase to kernel-5.6-rc1.
>     - [1/7]
>         - Squash thermal zone settings in the dtsi from [v3,5/8]
>           arm64: dts: mt8183: Increase polling frequency for CPU thermal zone.
>         - Remove the property of interrupts and mediatek,hw-reset-temp.
>     - [2/7]
>         - Correct commit message.
>     - [4/7]
>         - Change the target temperature to the 80C and change the commit message.
>     - [6/7]
>         - Adjust newline alignment.
>         - Fix the judgement on the return value of registering thermal zone.
> 
> Changes in v3:
>     - Rebase to kernel-5.5-rc1.
>     - [1/8]
>         - Update sustainable power of cpu, tzts1~5 and tztsABB.
>     - [7/8]
>         - Bypass the failure that non cpu_thermal sensor is not find in thermal-zones
>           in dts, which is normal for mt8173, so prompt a warning here instead of
>           failing.
> 
> 	Return -EAGAIN instead of -EACCESS on the first read of sensor that
>         often are bogus values. This can avoid following warning on boot:
> 
>           thermal thermal_zone6: failed to read out thermal zone (-13)
> 
> Changes in v2:
>     - [1/8]
>         - Add the sustainable-power,trips,cooling-maps to the tzts1~tztsABB.
>     - [4/8]
>         - Add the min opp of cpu throttle.
> 
> Matthias Kaehlcke (1):
>   arm64: dts: mt8183: Configure CPU cooling
> 
> Michael Kao (2):
>   thermal: mediatek: add another get_temp ops for thermal sensors
>   arm64: dts: mt8183: add thermal zone node
> ---
>  drivers/thermal/mtk_thermal.c | 100 +++++++++++++++++++++++++++++++-----------
>  1 file changed, 75 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> index 97e8678..b6bee451 100644
> --- a/drivers/thermal/mtk_thermal.c
> +++ b/drivers/thermal/mtk_thermal.c
> @@ -245,6 +245,11 @@ enum mtk_thermal_version {
>  
>  struct mtk_thermal;
>  
> +struct mtk_thermal_zone {
> +	struct mtk_thermal *mt;
> +	int id;
> +};

How does it differ from 'struct mtk_thermal_bank' ?

>  struct thermal_bank_cfg {
>  	unsigned int num_sensors;
>  	const int *sensors;
> @@ -637,6 +642,30 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
>  		mutex_unlock(&mt->lock);
>  }
>  
> +static u32 _get_sensor_temp(struct mtk_thermal *mt, int id)
> +{
> +	u32 raw;
> +	int temp;
> +
> +	raw = readl(mt->thermal_base + mt->conf->msr[id]);
> +
> +	if (mt->conf->version == MTK_THERMAL_V1)
> +		temp = raw_to_mcelsius_v1(mt, id, raw);
> +	else
> +		temp = raw_to_mcelsius_v2(mt, id, raw);

Please add the proper conversion function as a callback and set it at
probe time, instead of checking at every call.

> +	/*
> +	 * The first read of a sensor often contains very high bogus
> +	 * temperature value. Filter these out so that the system does
> +	 * not immediately shut down.
> +	 */

If it happens only once, why not call this function at probe time so
this test won't be needed.

> +	if (temp > 200000)
> +		return -EAGAIN;
> +	else
> +		return temp;
> +}
> +
>  /**
>   * mtk_thermal_bank_temperature - get the temperature of a bank
>   * @bank:	The bank
> @@ -647,28 +676,11 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
>  static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
>  {
>  	struct mtk_thermal *mt = bank->mt;
> -	const struct mtk_thermal_data *conf = mt->conf;
>  	int i, temp = INT_MIN, max = INT_MIN;
> -	u32 raw;
> -
> -	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
> -		raw = readl(mt->thermal_base + conf->msr[i]);
>  
> -		if (mt->conf->version == MTK_THERMAL_V1) {
> -			temp = raw_to_mcelsius_v1(
> -				mt, conf->bank_data[bank->id].sensors[i], raw);
> -		} else {
> -			temp = raw_to_mcelsius_v2(
> -				mt, conf->bank_data[bank->id].sensors[i], raw);
> -		}
> +	for (i = 0; i < mt->conf->bank_data[bank->id].num_sensors; i++) {
>  
> -		/*
> -		 * The first read of a sensor often contains very high bogus
> -		 * temperature value. Filter these out so that the system does
> -		 * not immediately shut down.
> -		 */
> -		if (temp > 200000)
> -			temp = 0;
> +		temp = _get_sensor_temp(mt, i);
>  
>  		if (temp > max)
>  			max = temp;
> @@ -679,7 +691,8 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
>  
>  static int mtk_read_temp(void *data, int *temperature)
>  {
> -	struct mtk_thermal *mt = data;
> +	struct mtk_thermal_zone *tz = data;
> +	struct mtk_thermal *mt = tz->mt;
>  	int i;
>  	int tempmax = INT_MIN;
>  
> @@ -698,10 +711,28 @@ static int mtk_read_temp(void *data, int *temperature)
>  	return 0;
>  }
>  
> +static int mtk_read_sensor_temp(void *data, int *temperature)
> +{
> +	struct mtk_thermal_zone *tz = data;
> +	struct mtk_thermal *mt = tz->mt;
> +	int id = tz->id - 1;
> +
> +	if (id < 0)
> +		return -EACCES;

How this can happen ?

> +
> +	*temperature = _get_sensor_temp(mt, id);
> +
> +	return 0;
> +}
> +
>  static const struct thermal_zone_of_device_ops mtk_thermal_ops = {
>  	.get_temp = mtk_read_temp,
>  };
>  
> +static const struct thermal_zone_of_device_ops mtk_thermal_sensor_ops = {
> +	.get_temp = mtk_read_sensor_temp,
> +};
> +
>  static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>  				  u32 apmixed_phys_base, u32 auxadc_phys_base,
>  				  int ctrl_id)
> @@ -992,6 +1023,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
>  	u64 auxadc_phys_base, apmixed_phys_base;
>  	struct thermal_zone_device *tzdev;
>  	void __iomem *apmixed_base, *auxadc_base;
> +	struct mtk_thermal_zone *tz;
>  
>  	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
>  	if (!mt)
> @@ -1080,11 +1112,29 @@ static int mtk_thermal_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, mt);
>  
> -	tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, mt,
> -						     &mtk_thermal_ops);
> -	if (IS_ERR(tzdev)) {
> -		ret = PTR_ERR(tzdev);
> -		goto err_disable_clk_peri_therm;
> +	for (i = 0; i < mt->conf->num_sensors + 1; i++) {
> +		tz = devm_kmalloc(&pdev->dev, sizeof(*tz), GFP_KERNEL);
> +		if (!tz)
> +			return -ENOMEM;
> +
> +		tz->mt = mt;
> +		tz->id = i;
> +
> +		tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, i, tz, (i == 0) ?
> +							     &mtk_thermal_ops :
> +							     &mtk_thermal_sensor_ops);
> +
> +		if (IS_ERR(tzdev)) {
> +			if (PTR_ERR(tzdev) == -ENODEV) {
> +				dev_warn(&pdev->dev,
> +					 "sensor %d not registered in thermal zone in dt\n", i);
> +				continue;
> +			}
> +			if (PTR_ERR(tzdev) == -EACCES) {
> +				ret = PTR_ERR(tzdev);
> +				goto err_disable_clk_peri_therm;
> +			}

If the error is none of the above, the loop continues. Is that what you
want ?

> +		}
>  	}
>  
>  	return 0;
> 


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Re: [PATCH v8] thermal: mediatek: add another get_temp ops for thermal sensors

[Ben Tseng]

Dear Daniel,

Sorry for the late reply


On Mon, 2021-06-14 at 18:58 +0200, Daniel Lezcano wrote:
> On 03/06/2021 13:00, Ben Tseng wrote:
> > From: Michael Kao <michael.kao@mediatek.com>
> > 
> > Provide thermal zone to read thermal sensor
> > in the SoC. We can read all the thermal sensors
> > value in the SoC by the node /sys/class/thermal/
> > 
> > In mtk_thermal_bank_temperature, return -EAGAIN instead of -EACCESS
> > on the first read of sensor that often are bogus values.
> > This can avoid following warning on boot:
> > 
> >   thermal thermal_zone6: failed to read out thermal zone (-13)
> > 
> > Signed-off-by: Michael Kao <michael.kao@mediatek.com>
> > Signed-off-by: Ben Tseng <ben.tseng@mediatek.com>
> > 
> > ---
> > 
> > This patchset supports for MT8183 chip to mtk_thermal.c.
> > Add thermal zone of all the thermal sensor in SoC for
> > another get temperatrue. They don't need to thermal throttle.
> > And we bind coolers for thermal zone nodes of cpu_thermal.
> > 
> > Changes in V8:
> >     - Rebase to kernel-v5.13-rc1
> >     - Resend
> > 
> > Changes in v7:
> >     - Fix build error in v6.
> > 
> > Changes in v6:
> >     - Rebase to kernel-5.11-rc1.
> >     - [1/3]
> >         - add interrupts property.
> >     - [2/3]
> >         - add the Tested-by in the commit message.
> >     - [3/3]
> >         - use the mt->conf->msr[id] instead of conf->msr[id] in the
> >           _get_sensor_temp and mtk_thermal_bank_temperature.
> >         - remove the redundant space in _get_sensor_temp and
> >           mtk_read_sensor_temp.
> >         - change kmalloc to dev_kmalloc in mtk_thermal_probe.
> > 
> > Changes in v5:
> >     - Rebase to kernel-5.9-rc1.
> >     - Revise the title of cover letter.
> >     - Drop "[v4,7/7] thermal: mediatek: use spinlock to protect
> > PTPCORESEL"
> >     - [2/2]
> >         -  Add the judgement to the version of raw_to_mcelsius.
> > 
> > Changes in v4:
> >     - Rebase to kernel-5.6-rc1.
> >     - [1/7]
> >         - Squash thermal zone settings in the dtsi from [v3,5/8]
> >           arm64: dts: mt8183: Increase polling frequency for CPU
> > thermal zone.
> >         - Remove the property of interrupts and mediatek,hw-reset-
> > temp.
> >     - [2/7]
> >         - Correct commit message.
> >     - [4/7]
> >         - Change the target temperature to the 80C and change the
> > commit message.
> >     - [6/7]
> >         - Adjust newline alignment.
> >         - Fix the judgement on the return value of registering
> > thermal zone.
> > 
> > Changes in v3:
> >     - Rebase to kernel-5.5-rc1.
> >     - [1/8]
> >         - Update sustainable power of cpu, tzts1~5 and tztsABB.
> >     - [7/8]
> >         - Bypass the failure that non cpu_thermal sensor is not
> > find in thermal-zones
> >           in dts, which is normal for mt8173, so prompt a warning
> > here instead of
> >           failing.
> > 
> > 	Return -EAGAIN instead of -EACCESS on the first read of sensor
> > that
> >         often are bogus values. This can avoid following warning on
> > boot:
> > 
> >           thermal thermal_zone6: failed to read out thermal zone (-
> > 13)
> > 
> > Changes in v2:
> >     - [1/8]
> >         - Add the sustainable-power,trips,cooling-maps to the
> > tzts1~tztsABB.
> >     - [4/8]
> >         - Add the min opp of cpu throttle.
> > 
> > Matthias Kaehlcke (1):
> >   arm64: dts: mt8183: Configure CPU cooling
> > 
> > Michael Kao (2):
> >   thermal: mediatek: add another get_temp ops for thermal sensors
> >   arm64: dts: mt8183: add thermal zone node
> > ---
> >  drivers/thermal/mtk_thermal.c | 100
> > +++++++++++++++++++++++++++++++-----------
> >  1 file changed, 75 insertions(+), 25 deletions(-)
> > 
> > diff --git a/drivers/thermal/mtk_thermal.c
> > b/drivers/thermal/mtk_thermal.c
> > index 97e8678..b6bee451 100644
> > --- a/drivers/thermal/mtk_thermal.c
> > +++ b/drivers/thermal/mtk_thermal.c
> > @@ -245,6 +245,11 @@ enum mtk_thermal_version {
> >  
> >  struct mtk_thermal;
> >  
> > +struct mtk_thermal_zone {
> > +	struct mtk_thermal *mt;
> > +	int id;
> > +};
> 
> How does it differ from 'struct mtk_thermal_bank' ?

"truct mtk_thermal_zone" is duplicated. It will be removed next version

> 
> >  struct thermal_bank_cfg {
> >  	unsigned int num_sensors;
> >  	const int *sensors;
> > @@ -637,6 +642,30 @@ static void mtk_thermal_put_bank(struct
> > mtk_thermal_bank *bank)
> >  		mutex_unlock(&mt->lock);
> >  }
> >  
> > +static u32 _get_sensor_temp(struct mtk_thermal *mt, int id)
> > +{
> > +	u32 raw;
> > +	int temp;
> > +
> > +	raw = readl(mt->thermal_base + mt->conf->msr[id]);
> > +
> > +	if (mt->conf->version == MTK_THERMAL_V1)
> > +		temp = raw_to_mcelsius_v1(mt, id, raw);
> > +	else
> > +		temp = raw_to_mcelsius_v2(mt, id, raw);
> 
> Please add the proper conversion function as a callback and set it at
> probe time, instead of checking at every call.
> 

Thanks for your advisement. V1 or V2 will be assigned to a function
pointer during probe.

> > +	/*
> > +	 * The first read of a sensor often contains very high bogus
> > +	 * temperature value. Filter these out so that the system does
> > +	 * not immediately shut down.
> > +	 */
> 
> If it happens only once, why not call this function at probe time so
> this test won't be needed.
> 

It's exist in previous upstream version, and old chips should be
compatible. So we need to keep this filter to avoid wrong sensor
reading.

> > +	if (temp > 200000)
> > +		return -EAGAIN;
> > +	else
> > +		return temp;
> > +}
> > +
> >  /**
> >   * mtk_thermal_bank_temperature - get the temperature of a bank
> >   * @bank:	The bank
> > @@ -647,28 +676,11 @@ static void mtk_thermal_put_bank(struct
> > mtk_thermal_bank *bank)
> >  static int mtk_thermal_bank_temperature(struct mtk_thermal_bank
> > *bank)
> >  {
> >  	struct mtk_thermal *mt = bank->mt;
> > -	const struct mtk_thermal_data *conf = mt->conf;
> >  	int i, temp = INT_MIN, max = INT_MIN;
> > -	u32 raw;
> > -
> > -	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
> > -		raw = readl(mt->thermal_base + conf->msr[i]);
> >  
> > -		if (mt->conf->version == MTK_THERMAL_V1) {
> > -			temp = raw_to_mcelsius_v1(
> > -				mt, conf->bank_data[bank-
> > >id].sensors[i], raw);
> > -		} else {
> > -			temp = raw_to_mcelsius_v2(
> > -				mt, conf->bank_data[bank-
> > >id].sensors[i], raw);
> > -		}
> > +	for (i = 0; i < mt->conf->bank_data[bank->id].num_sensors; i++)
> > {
> >  
> > -		/*
> > -		 * The first read of a sensor often contains very high
> > bogus
> > -		 * temperature value. Filter these out so that the
> > system does
> > -		 * not immediately shut down.
> > -		 */
> > -		if (temp > 200000)
> > -			temp = 0;
> > +		temp = _get_sensor_temp(mt, i);
> >  
> >  		if (temp > max)
> >  			max = temp;
> > @@ -679,7 +691,8 @@ static int mtk_thermal_bank_temperature(struct
> > mtk_thermal_bank *bank)
> >  
> >  static int mtk_read_temp(void *data, int *temperature)
> >  {
> > -	struct mtk_thermal *mt = data;
> > +	struct mtk_thermal_zone *tz = data;
> > +	struct mtk_thermal *mt = tz->mt;
> >  	int i;
> >  	int tempmax = INT_MIN;
> >  
> > @@ -698,10 +711,28 @@ static int mtk_read_temp(void *data, int
> > *temperature)
> >  	return 0;
> >  }
> >  
> > +static int mtk_read_sensor_temp(void *data, int *temperature)
> > +{
> > +	struct mtk_thermal_zone *tz = data;
> > +	struct mtk_thermal *mt = tz->mt;
> > +	int id = tz->id - 1;
> > +
> > +	if (id < 0)
> > +		return -EACCES;
> 
> How this can happen ?
> 

tz->id > 0 is always true. It will be removed in next version.


> > 
> > +	*temperature = _get_sensor_temp(mt, id);
> > +
> > +	return 0;
> > +}
> > +
> >  static const struct thermal_zone_of_device_ops mtk_thermal_ops = {
> >  	.get_temp = mtk_read_temp,
> >  };
> >  
> > +static const struct thermal_zone_of_device_ops
> > mtk_thermal_sensor_ops = {
> > +	.get_temp = mtk_read_sensor_temp,
> > +};
> > +
> >  static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> >  				  u32 apmixed_phys_base, u32
> > auxadc_phys_base,
> >  				  int ctrl_id)
> > @@ -992,6 +1023,7 @@ static int mtk_thermal_probe(struct
> > platform_device *pdev)
> >  	u64 auxadc_phys_base, apmixed_phys_base;
> >  	struct thermal_zone_device *tzdev;
> >  	void __iomem *apmixed_base, *auxadc_base;
> > +	struct mtk_thermal_zone *tz;
> >  
> >  	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
> >  	if (!mt)
> > @@ -1080,11 +1112,29 @@ static int mtk_thermal_probe(struct
> > platform_device *pdev)
> >  
> >  	platform_set_drvdata(pdev, mt);
> >  
> > -	tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, mt,
> > -						     &mtk_thermal_ops);
> > -	if (IS_ERR(tzdev)) {
> > -		ret = PTR_ERR(tzdev);
> > -		goto err_disable_clk_peri_therm;
> > +	for (i = 0; i < mt->conf->num_sensors + 1; i++) {
> > +		tz = devm_kmalloc(&pdev->dev, sizeof(*tz), GFP_KERNEL);
> > +		if (!tz)
> > +			return -ENOMEM;
> > +
> > +		tz->mt = mt;
> > +		tz->id = i;
> > +
> > +		tzdev = devm_thermal_zone_of_sensor_register(&pdev-
> > >dev, i, tz, (i == 0) ?
> > +							     &mtk_therm
> > al_ops :
> > +							     &mtk_therm
> > al_sensor_ops);
> > +
> > +		if (IS_ERR(tzdev)) {
> > +			if (PTR_ERR(tzdev) == -ENODEV) {
> > +				dev_warn(&pdev->dev,
> > +					 "sensor %d not registered in
> > thermal zone in dt\n", i);
> > +				continue;
> > +			}
> > +			if (PTR_ERR(tzdev) == -EACCES) {
> > +				ret = PTR_ERR(tzdev);
> > +				goto err_disable_clk_peri_therm;
> > +			}
> 
> If the error is none of the above, the loop continues. Is that what
> you
> want ?

Next version, As soon as thermal zone register fail, break and return.

> > +		}
> >  	}
> >  
> >  	return 0;
> > 
> 
> 
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