[PATCH v5 02/11] thermal: core: Introduce thermal_zone_device_adjust()

Rafael J. Wysocki
2023-08-07T18:21:16Z

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@intel.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