From: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Date: Mon, 29 Jun 2020 14:29:20 +0200
Subject: thermal: Add mode helpers
Patch-mainline: v5.9-rc1
Git-commit: ac5d9ecc74d8beee8c87f1441e4adaf4e9fe90c5
References: jsc#SLE-16407

Prepare for making the drivers not access tzd's private members.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
[staticize thermal_zone_device_set_mode()]
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200629122925.21729-7-andrzej.p@collabora.com
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
 drivers/thermal/thermal_core.c |   53 +++++++++++++++++++++++++++++++++++++++++
 include/linux/thermal.h        |   13 ++++++++++
 2 files changed, 66 insertions(+)

--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -471,6 +471,59 @@ static void thermal_zone_device_reset(st
 	thermal_zone_device_init(tz);
 }
 
+static int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
+					enum thermal_device_mode mode)
+{
+	int ret = 0;
+
+	mutex_lock(&tz->lock);
+
+	/* do nothing if mode isn't changing */
+	if (mode == tz->mode) {
+		mutex_unlock(&tz->lock);
+
+		return ret;
+	}
+
+	if (tz->ops->set_mode)
+		ret = tz->ops->set_mode(tz, mode);
+
+	if (!ret)
+		tz->mode = mode;
+
+	mutex_unlock(&tz->lock);
+
+	thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
+
+	return ret;
+}
+
+int thermal_zone_device_enable(struct thermal_zone_device *tz)
+{
+	return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_ENABLED);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_enable);
+
+int thermal_zone_device_disable(struct thermal_zone_device *tz)
+{
+	return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_DISABLED);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_disable);
+
+int thermal_zone_device_is_enabled(struct thermal_zone_device *tz)
+{
+	enum thermal_device_mode mode;
+
+	mutex_lock(&tz->lock);
+
+	mode = tz->mode;
+
+	mutex_unlock(&tz->lock);
+
+	return mode == THERMAL_DEVICE_ENABLED;
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_is_enabled);
+
 void thermal_zone_device_update(struct thermal_zone_device *tz,
 				enum thermal_notify_event event)
 {
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -463,6 +463,9 @@ struct thermal_instance *get_thermal_ins
 		struct thermal_cooling_device *, int);
 void thermal_cdev_update(struct thermal_cooling_device *);
 void thermal_notify_framework(struct thermal_zone_device *, int);
+int thermal_zone_device_enable(struct thermal_zone_device *tz);
+int thermal_zone_device_disable(struct thermal_zone_device *tz);
+int thermal_zone_device_is_enabled(struct thermal_zone_device *tz);
 #else
 static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 { return false; }
@@ -542,6 +545,16 @@ static inline void thermal_cdev_update(s
 static inline void thermal_notify_framework(struct thermal_zone_device *tz,
 	int trip)
 { }
+
+static inline int thermal_zone_device_enable(struct thermal_zone_device *tz)
+{ return -ENODEV; }
+
+static inline int thermal_zone_device_disable(struct thermal_zone_device *tz)
+{ return -ENODEV; }
+
+static inline int
+thermal_zone_device_is_enabled(struct thermal_zone_device *tz)
+{ return -ENODEV; }
 #endif /* CONFIG_THERMAL */
 
 #if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL)