linux-kernel - [PATCH v2 5/7] thermal/core: Prepare sanitizing thermal class sysfs content

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Date:   Mon, 10 Apr 2023 22:53:03 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     daniel.lezcano@...aro.org, rafael@...nel.org
Cc:     rui.zhang@...el.com, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Amit Kucheria <amitk@...nel.org>
Subject: [PATCH v2 5/7] thermal/core: Prepare sanitizing thermal class sysfs content

Some drivers are accessing the thermal zone device structure to create
specific entries in /sys/class/thermal regardless the documentation.

It is questionable as the specific information should be in the
driver's sysfs directory, not the framework it is dealing with.

It has been long time these specific attributes were added in the
thermal sysfs directory and are limited to the ACPI thermal driver and
the Menlon driver.

It is probable those are not really needed, so in order to figure out
if that is the case, let's create a default option disabling the
attribute in order to prepare a definitive removal.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 drivers/thermal/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 4cd7ab707315..cca4e5cf6f30 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -33,6 +33,18 @@ config THERMAL_STATISTICS

 	  If in doubt, say N.

+config THERMAL_SYSFS_OBSOLETE_SINGULARITY
+	bool "Enable obsolete and undocumented sysfs extra information"
+	def_bool n
+	help
+	  Enable sysfs extra information added in the thermal zone and
+	  the driver specific sysfs directories. That could be a link
+	  to the associated thermal zone as well as a link pointing to
+	  the device from the thermal zone. By default those are
+	  disabled and are candidate for removal, if you need these
+	  information anyway, enable the option or upgrade the
+	  userspace program using them.
+
 config THERMAL_EMERGENCY_POWEROFF_DELAY_MS
 	int "Emergency poweroff delay in milli-seconds"
 	default 0
-- 
2.34.1