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 <redacted>
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 [off-list ref]; Len Brown [off-list ref]; open
list:ACPI THERMAL DRIVER [off-list ref]
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:

quoted

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 <redacted>

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

Thanks,
rui

Are you fine with this change?

Thanks

  -- Daniel

quoted

---
 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,

quoted

 		}
 	}

-	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,

quoted

-						 cdev, THERMAL_NO_LIMIT,
-						 THERMAL_NO_LIMIT,
-

THERMAL_WEIGHT_DEFAULT);

quoted

-			else
-				result =

thermal_zone_unbind_cooling_device

quoted

-						(thermal,

THERMAL_TRIPS_NONE,

quoted

-						 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