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: [PATCHv4 07/15] Thermal: Add a policy sysfs attribute
Date: Tue, 18 Sep 2012 11:04:58 +0530 [thread overview]
Message-ID: <1347946506-18449-8-git-send-email-durgadoss.r@intel.com> (raw)
In-Reply-To: <1347946506-18449-1-git-send-email-durgadoss.r@intel.com>
This patch adds a policy sysfs attribute to a thermal zone.
This attribute denotes the throttling governor used for the
zone. This is a RW attribute.
Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
---
drivers/thermal/thermal_sys.c | 42 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 39 insertions(+), 3 deletions(-)
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index a67c6c0..0948a60 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -454,10 +454,41 @@ passive_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%d\n", tz->forced_passive);
}
+static ssize_t
+policy_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret = -EINVAL;
+ struct thermal_zone_device *tz = to_thermal_zone(dev);
+ struct thermal_governor *gov;
+
+ mutex_lock(&thermal_governor_lock);
+
+ gov = __find_governor(buf);
+ if (!gov)
+ goto exit;
+
+ tz->governor = gov;
+ ret = count;
+
+exit:
+ mutex_unlock(&thermal_governor_lock);
+ return ret;
+}
+
+static ssize_t
+policy_show(struct device *dev, struct device_attribute *devattr, char *buf)
+{
+ struct thermal_zone_device *tz = to_thermal_zone(dev);
+
+ return sprintf(buf, "%s\n", tz->governor->name);
+}
+
static DEVICE_ATTR(type, 0444, type_show, NULL);
static DEVICE_ATTR(temp, 0444, temp_show, NULL);
static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
+static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store);
/* sys I/F for cooling device */
#define to_cooling_device(_dev) \
@@ -1512,10 +1543,14 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
passive = 1;
}
- if (!passive)
- result = device_create_file(&tz->device,
- &dev_attr_passive);
+ if (!passive) {
+ result = device_create_file(&tz->device, &dev_attr_passive);
+ if (result)
+ goto unregister;
+ }
+ /* Create policy attribute */
+ result = device_create_file(&tz->device, &dev_attr_policy);
if (result)
goto unregister;
@@ -1591,6 +1626,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
device_remove_file(&tz->device, &dev_attr_temp);
if (tz->ops->get_mode)
device_remove_file(&tz->device, &dev_attr_mode);
+ device_remove_file(&tz->device, &dev_attr_policy);
remove_trip_attrs(tz);
tz->governor = NULL;
--
1.7.9.5
next prev parent reply other threads:[~2012-09-18 5:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-18 5:34 [PATCHv4 00/15] Thermal_framework_enhancements Durgadoss R
2012-09-18 5:34 ` [PATCHv4 01/15] Thermal: Refactor thermal.h file Durgadoss R
2012-09-18 5:34 ` [PATCHv4 02/15] Thermal: Move thermal_instance to thermal_core.h Durgadoss R
2012-09-18 5:34 ` [PATCHv4 03/15] Thermal: Add get trend, get instance API's to thermal_sys Durgadoss R
2012-09-18 5:34 ` [PATCHv4 04/15] Thermal: Add platform level information to thermal.h Durgadoss R
2012-09-21 7:12 ` Zhang Rui
2012-09-21 8:07 ` R, Durgadoss
2012-09-24 5:43 ` Zhang Rui
2012-09-18 5:34 ` [PATCHv4 05/15] Thermal: Pass zone parameters as argument to tzd_register Durgadoss R
2012-09-18 5:34 ` [PATCHv4 06/15] Thermal: Add thermal governor registration APIs Durgadoss R
2012-09-18 5:34 ` Durgadoss R [this message]
2012-09-21 8:07 ` [PATCHv4 07/15] Thermal: Add a policy sysfs attribute Zhang Rui
2012-09-21 8:09 ` R, Durgadoss
2012-09-24 5:44 ` Zhang Rui
2012-09-18 5:34 ` [PATCHv4 08/15] Thermal: Update binding logic based on platform data Durgadoss R
2012-09-18 5:35 ` [PATCHv4 09/15] Thermal: Make thermal_cdev_update as a global function Durgadoss R
2012-09-18 5:35 ` [PATCHv4 10/15] Thermal: Introduce fair_share thermal governor Durgadoss R
2012-09-18 5:35 ` [PATCHv4 11/15] Thermal: Introduce a step_wise " Durgadoss R
2012-09-18 7:13 ` Zhang Rui
2012-09-18 8:11 ` R, Durgadoss
2012-09-18 8:22 ` Zhang Rui
2012-09-18 8:32 ` R, Durgadoss
2012-09-18 5:35 ` [PATCHv4 12/15] Thermal: Add a thermal notifier for user space Durgadoss R
2012-09-18 5:35 ` [PATCHv4 13/15] Thermal: Remove throttling logic out of thermal_sys.c Durgadoss R
2012-09-18 5:35 ` [PATCHv4 14/15] Thermal: Add a notification API Durgadoss R
2012-09-18 5:35 ` [PATCHv4 15/15] Thermal: Add documentation for platform layer data Durgadoss R
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