From: Durgadoss R <durgadoss.r@intel.com>
To: lenb@kernel.org, rui.zhang@intel.com
Cc: linux-acpi@vger.kernel.org, eduardo.valentin@ti.com,
Durgadoss R <durgadoss.r@intel.com>
Subject: [PATCHv3 12/15] Thermal: Register a governor for user space
Date: Sat, 1 Sep 2012 17:21:33 +0530 [thread overview]
Message-ID: <1346500296-25200-13-git-send-email-durgadoss.r@intel.com> (raw)
In-Reply-To: <1346500296-25200-1-git-send-email-durgadoss.r@intel.com>
This patch registers a governor which will let the
user land manage the platform thermals. Whenever a
trip happens, this governor just notifies the user
space using kobj_uevent().
Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
---
drivers/thermal/thermal_sys.c | 18 ++++++++++++++++++
include/linux/thermal.h | 2 ++
2 files changed, 20 insertions(+)
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 936b025..93672aa 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -130,6 +130,15 @@ exit:
}
EXPORT_SYMBOL_GPL(thermal_unregister_governor);
+static int notify_user_space(struct thermal_zone_device *tz, int trip)
+{
+ mutex_lock(&tz->lock);
+ kobject_uevent(&tz->device.kobj, KOBJ_CHANGE);
+ mutex_unlock(&tz->lock);
+
+ return 0;
+}
+
static int get_idr(struct idr *idr, struct mutex *lock, int *id)
{
int err;
@@ -1860,6 +1869,12 @@ static inline int genetlink_init(void) { return 0; }
static inline void genetlink_exit(void) {}
#endif /* !CONFIG_NET */
+struct thermal_governor thermal_gov_user_space = {
+ .name = USER_SPACE_THERMAL_GOVERNOR,
+ .throttle = notify_user_space,
+ .owner = THIS_MODULE,
+};
+
static int __init thermal_init(void)
{
int result = 0;
@@ -1871,6 +1886,8 @@ static int __init thermal_init(void)
mutex_destroy(&thermal_idr_lock);
mutex_destroy(&thermal_list_lock);
}
+ /* Register a governor to notify user space */
+ thermal_register_governor(&thermal_gov_user_space);
result = genetlink_init();
return result;
}
@@ -1882,6 +1899,7 @@ static void __exit thermal_exit(void)
idr_destroy(&thermal_cdev_idr);
mutex_destroy(&thermal_idr_lock);
mutex_destroy(&thermal_list_lock);
+ thermal_unregister_governor(&thermal_gov_user_space);
genetlink_exit();
}
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 2bd9158..aa903dd 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -48,6 +48,8 @@
/* Default Thermal Governor: Does Linear Throttling */
#define DEFAULT_THERMAL_GOVERNOR "step_wise"
+/* User space Thermal governor */
+#define USER_SPACE_THERMAL_GOVERNOR "user_space"
struct thermal_zone_device;
struct thermal_cooling_device;
--
1.7.9.5
next prev parent reply other threads:[~2012-09-01 11:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-01 11:51 [PATCHv3 00/15] Thermal_Framework_Enhancements Durgadoss R
2012-09-01 11:51 ` [PATCHv3 01/15] Thermal: Refactor thermal.h file Durgadoss R
2012-09-01 11:51 ` [PATCHv3 02/15] Thermal: Move thermal_instance to thermal_core.h Durgadoss R
2012-09-01 11:51 ` [PATCHv3 03/15] Thermal: Add get trend, get instance API's to thermal_sys Durgadoss R
2012-09-01 11:51 ` [PATCHv3 04/15] Thermal: Add platform level information to thermal.h Durgadoss R
2012-09-01 11:51 ` [PATCHv3 05/15] Thermal: Pass zone parameters as argument to tzd_register Durgadoss R
2012-09-01 11:51 ` [PATCHv3 06/15] Thermal: Add thermal governor registration APIs Durgadoss R
2012-09-10 8:28 ` Zhang Rui
2012-09-01 11:51 ` [PATCHv3 07/15] Thermal: Add a policy sysfs attribute Durgadoss R
2012-09-01 11:51 ` [PATCHv3 08/15] Thermal: Update binding logic based on platform data Durgadoss R
2012-09-01 11:51 ` [PATCHv3 09/15] Thermal: Make thermal_cdev_update as a global function Durgadoss R
2012-09-01 11:51 ` [PATCHv3 10/15] Thermal: Introduce fair_share thermal governor Durgadoss R
2012-09-01 11:51 ` [PATCHv3 11/15] Thermal: Introduce a step_wise " Durgadoss R
2012-09-01 11:51 ` Durgadoss R [this message]
2012-09-10 8:37 ` [PATCHv3 12/15] Thermal: Register a governor for user space Zhang Rui
2012-09-01 11:51 ` [PATCHv3 13/15] Thermal: Remove throttling logic out of thermal_sys.c Durgadoss R
2012-09-10 8:44 ` Zhang Rui
2012-09-10 8:56 ` R, Durgadoss
2012-09-11 0:24 ` Zhang Rui
2012-09-11 3:05 ` R, Durgadoss
2012-09-11 3:20 ` Zhang Rui
2012-09-11 3:39 ` R, Durgadoss
2012-09-01 11:51 ` [PATCHv3 14/15] Thermal: Add a notification API Durgadoss R
2012-09-01 11:51 ` [PATCHv3 15/15] Thermal: Add documentation for platform layer data Durgadoss R
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