add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/thermal/thermal_helpers.c
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@@ -12,11 +12,12 @@
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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-#include <linux/sysfs.h>
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 #include <linux/device.h>
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 #include <linux/err.h>
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+#include <linux/export.h>
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 #include <linux/slab.h>
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 #include <linux/string.h>
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+#include <linux/sysfs.h>
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 #include <trace/events/thermal.h>
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@@ -113,6 +114,18 @@
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 }
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 EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
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+/**
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+ * thermal_zone_set_trips - Computes the next trip points for the driver
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+ * @tz: a pointer to a thermal zone device structure
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+ *
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+ * The function computes the next temperature boundaries by browsing
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+ * the trip points. The result is the closer low and high trip points
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+ * to the current temperature. These values are passed to the backend
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+ * driver to let it set its own notification mechanism (usually an
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+ * interrupt).
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+ *
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+ * It does not return a value
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+ */
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 void thermal_zone_set_trips(struct thermal_zone_device *tz)
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 {
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 	int low = -INT_MAX;
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@@ -161,7 +174,16 @@
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 exit:
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 	mutex_unlock(&tz->lock);
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 }
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-EXPORT_SYMBOL_GPL(thermal_zone_set_trips);
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+
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+static void thermal_cdev_set_cur_state(struct thermal_cooling_device *cdev,
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+				       int target)
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+{
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+	if (cdev->ops->set_cur_state(cdev, target))
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+		return;
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+
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+	thermal_notify_cdev_state_update(cdev->id, target);
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+	thermal_cooling_device_stats_update(cdev, target);
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+}
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 void thermal_cdev_update(struct thermal_cooling_device *cdev)
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 {
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@@ -185,8 +207,7 @@
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 			target = instance->target;
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 	}
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-	if (!cdev->ops->set_cur_state(cdev, target))
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-		thermal_cooling_device_stats_update(cdev, target);
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+	thermal_cdev_set_cur_state(cdev, target);
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 	cdev->updated = true;
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 	mutex_unlock(&cdev->lock);