linux-kernel - [PATCH v5 02/11] thermal: core: Introduce thermal_zone_device

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Message-ID: <2154540.irdbgypaU6@kreacher>
Date:   Mon, 07 Aug 2023 20:02:57 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Michal Wilczynski <michal.wilczynski@...el.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH v5 02/11] thermal: core: Introduce thermal_zone_device_adjust()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Introduce a new thermal zone device operation called .update() for
modifying thermal zone components such as trip point and a new helper
function, thermal_zone_device_adjust(), that can be used by drivers
providing the new thermal zone device operation to invoke it under
the zone lock.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---

v4 -> v5: No changes.

New patch in v4.

---
 drivers/thermal/thermal_core.c |   20 ++++++++++++++++++++
 include/linux/thermal.h        |    2 ++
 2 files changed, 22 insertions(+)

Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -74,6 +74,7 @@ struct thermal_zone_device_ops {
 			  enum thermal_trend *);
 	void (*hot)(struct thermal_zone_device *);
 	void (*critical)(struct thermal_zone_device *);
+	void (*update)(struct thermal_zone_device *, unsigned long);
 };
 
 /**
@@ -323,6 +324,7 @@ int thermal_zone_unbind_cooling_device(s
 				       struct thermal_cooling_device *);
 void thermal_zone_device_update(struct thermal_zone_device *,
 				enum thermal_notify_event);
+void thermal_zone_device_adjust(struct thermal_zone_device *tz, unsigned long data);
 
 struct thermal_cooling_device *thermal_cooling_device_register(const char *,
 		void *, const struct thermal_cooling_device_ops *);
Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -497,6 +497,26 @@ void thermal_zone_device_update(struct t
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_update);
 
+/**
+ * thermal_zone_device_adjust - Adjust a thermal zone.
+ * @tz: Thermal zone.
+ * @data: Data to pass to the zone's .update() callback.
+ *
+ * Modify components of a thermal zone (for example, trip points) via
+ * its .update() callback (for example, after a platform configuration
+ * change).
+ */
+void thermal_zone_device_adjust(struct thermal_zone_device *tz, unsigned long data)
+{
+	mutex_lock(&tz->lock);
+
+	if (device_is_registered(&tz->device) && tz->ops->update)
+		tz->ops->update(tz, data);
+
+	mutex_unlock(&tz->lock);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_adjust);
+
 static void thermal_zone_device_check(struct work_struct *work)
 {
 	struct thermal_zone_device *tz = container_of(work, struct