[PATCH 4/6] acpi/drivers/thermal: Remove TRIPS_NONE cooling device binding

[PATCH 4/6] acpi/drivers/thermal: Remove TRIPS_NONE cooling device binding

[Daniel Lezcano]

The loop is here to create default cooling device binding on the
THERMAL_TRIPS_NONE number which is used to be the 'forced_passive'
feature. However, we removed all code dealing with that in the thermal
core, thus this binding does no longer make sense.

Remove it.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/acpi/thermal.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index b5e4bc9e3282..26a89ff80a0e 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -764,25 +764,6 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
 		}
 	}
 
-	for (i = 0; i < tz->devices.count; i++) {
-		handle = tz->devices.handles[i];
-		status = acpi_bus_get_device(handle, &dev);
-		if (ACPI_SUCCESS(status) && (dev == device)) {
-			if (bind)
-				result = thermal_zone_bind_cooling_device
-						(thermal, THERMAL_TRIPS_NONE,
-						 cdev, THERMAL_NO_LIMIT,
-						 THERMAL_NO_LIMIT,
-						 THERMAL_WEIGHT_DEFAULT);
-			else
-				result = thermal_zone_unbind_cooling_device
-						(thermal, THERMAL_TRIPS_NONE,
-						 cdev);
-			if (result)
-				goto failed;
-		}
-	}
-
 failed:
 	return result;
 }
-- 
2.25.1

Re: [PATCH 4/6] acpi/drivers/thermal: Remove TRIPS_NONE cooling device binding

[Daniel Lezcano]

Hi Rui,


On 15/12/2020 00:38, Daniel Lezcano wrote:
> The loop is here to create default cooling device binding on the
> THERMAL_TRIPS_NONE number which is used to be the 'forced_passive'
> feature. However, we removed all code dealing with that in the thermal
> core, thus this binding does no longer make sense.
> 
> Remove it.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Are you fine with this change?

Thanks

  -- Daniel

> ---
>  drivers/acpi/thermal.c | 19 -------------------
>  1 file changed, 19 deletions(-)
> 
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index b5e4bc9e3282..26a89ff80a0e 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -764,25 +764,6 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
>  		}
>  	}
>  
> -	for (i = 0; i < tz->devices.count; i++) {
> -		handle = tz->devices.handles[i];
> -		status = acpi_bus_get_device(handle, &dev);
> -		if (ACPI_SUCCESS(status) && (dev == device)) {
> -			if (bind)
> -				result = thermal_zone_bind_cooling_device
> -						(thermal, THERMAL_TRIPS_NONE,
> -						 cdev, THERMAL_NO_LIMIT,
> -						 THERMAL_NO_LIMIT,
> -						 THERMAL_WEIGHT_DEFAULT);
> -			else
> -				result = thermal_zone_unbind_cooling_device
> -						(thermal, THERMAL_TRIPS_NONE,
> -						 cdev);
> -			if (result)
> -				goto failed;
> -		}
> -	}
> -
>  failed:
>  	return result;
>  }
> 


-- 
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

RE: [PATCH 4/6] acpi/drivers/thermal: Remove TRIPS_NONE cooling device binding

[Zhang, Rui]

ACPI thermal driver binds the devices listed in _TZD method with THERMAL_TRIPS_NONE.
Now given that
1. THERMAL_TRIPS_NONE is removed from thermal framework
2. _TZP is rarely supported. I searched ~500 acpidumps from different platforms reported by end users in kernel Bugzilla, there is only one platform with _TZP implemented, and it was almost 10 years ago.

So, I think it is safe to remove this piece of code.

> -----Original Message-----
> From: Daniel Lezcano <daniel.lezcano@linaro.org>
> Sent: Tuesday, January 05, 2021 11:44 PM
> To: Zhang, Rui <rui.zhang@intel.com>
> Cc: mjg59@codon.org.uk; linux-pm@vger.kernel.org; linux-
> kernel@vger.kernel.org; amitk@kernel.org; thara.gopinath@linaro.org;
> Rafael J. Wysocki <rjw@rjwysocki.net>; Len Brown <lenb@kernel.org>; open
> list:ACPI THERMAL DRIVER <linux-acpi@vger.kernel.org>
> Subject: Re: [PATCH 4/6] acpi/drivers/thermal: Remove TRIPS_NONE cooling
> device binding
> Importance: High
> 
> Hi Rui,
> 
> 
> On 15/12/2020 00:38, Daniel Lezcano wrote:
> > The loop is here to create default cooling device binding on the
> > THERMAL_TRIPS_NONE number which is used to be the 'forced_passive'
> > feature. However, we removed all code dealing with that in the thermal
> > core, thus this binding does no longer make sense.
> >
> > Remove it.
> >
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Acked-by: Zhang Rui <rui.zhang@intel.com>

Thanks,
rui
> 
> Are you fine with this change?
> 
> Thanks
> 
>   -- Daniel
> 
> > ---
> >  drivers/acpi/thermal.c | 19 -------------------
> >  1 file changed, 19 deletions(-)
> >
> > diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index
> > b5e4bc9e3282..26a89ff80a0e 100644
> > --- a/drivers/acpi/thermal.c
> > +++ b/drivers/acpi/thermal.c
> > @@ -764,25 +764,6 @@ static int acpi_thermal_cooling_device_cb(struct
> thermal_zone_device *thermal,
> >  		}
> >  	}
> >
> > -	for (i = 0; i < tz->devices.count; i++) {
> > -		handle = tz->devices.handles[i];
> > -		status = acpi_bus_get_device(handle, &dev);
> > -		if (ACPI_SUCCESS(status) && (dev == device)) {
> > -			if (bind)
> > -				result = thermal_zone_bind_cooling_device
> > -						(thermal,
> THERMAL_TRIPS_NONE,
> > -						 cdev, THERMAL_NO_LIMIT,
> > -						 THERMAL_NO_LIMIT,
> > -
> THERMAL_WEIGHT_DEFAULT);
> > -			else
> > -				result =
> thermal_zone_unbind_cooling_device
> > -						(thermal,
> THERMAL_TRIPS_NONE,
> > -						 cdev);
> > -			if (result)
> > -				goto failed;
> > -		}
> > -	}
> > -
> >  failed:
> >  	return result;
> >  }
> >
> 
> 
> --
> <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
> 
> Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
> <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-
> blog/> Blog

Re: [PATCH 4/6] acpi/drivers/thermal: Remove TRIPS_NONE cooling device binding

[Daniel Lezcano]

On 07/01/2021 06:10, Zhang, Rui wrote:
> ACPI thermal driver binds the devices listed in _TZD method with THERMAL_TRIPS_NONE.
> Now given that
> 1. THERMAL_TRIPS_NONE is removed from thermal framework
> 2. _TZP is rarely supported. I searched ~500 acpidumps from different platforms reported by end users in kernel Bugzilla, there is only one platform with _TZP implemented, and it was almost 10 years ago.
> 
> So, I think it is safe to remove this piece of code.

Thanks Rui for digging into



-- 
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog