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thermal: thermal_sys: Add support for configurable trip points.

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Add functionality for configurable hi, low and critical low.
Change the trip point attributes to allow userspace clients
with root access to set temperature for configurable hi and
low temperature.

Change-Id: I25c9c3bcfd58e44da5369187d1095559062f1860
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
This commit is contained in:
Siddartha Mohanadoss
2010-12-06 22:49:26 -08:00
committed by Stephen Boyd
parent 95db9f4073
commit a25189bc72
2 changed files with 139 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

151
drivers/thermal/thermal_sys.c
View File

@@ -186,6 +186,12 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "critical\n");
case THERMAL_TRIP_HOT:
return sprintf(buf, "hot\n");
case THERMAL_TRIP_CONFIGURABLE_HI:
return sprintf(buf, "configurable_hi\n");
case THERMAL_TRIP_CONFIGURABLE_LOW:
return sprintf(buf, "configurable_low\n");
case THERMAL_TRIP_CRITICAL_LOW:
return sprintf(buf, "critical_low\n");
case THERMAL_TRIP_PASSIVE:
return sprintf(buf, "passive\n");
case THERMAL_TRIP_ACTIVE:
@@ -195,6 +201,34 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr,
}
}
static ssize_t
trip_point_type_activate(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct thermal_zone_device *tz = to_thermal_zone(dev);
int trip, result;
if (!tz->ops->activate_trip_type)
return -EPERM;
if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
return -EINVAL;
if (!strncmp(buf, "enabled", sizeof("enabled")))
result = tz->ops->activate_trip_type(tz, trip,
THERMAL_TRIP_ACTIVATION_ENABLED);
else if (!strncmp(buf, "disabled", sizeof("disabled")))
result = tz->ops->activate_trip_type(tz, trip,
THERMAL_TRIP_ACTIVATION_DISABLED);
else
result = -EINVAL;
if (result)
return result;
return count;
}
static ssize_t
trip_point_temp_show(struct device *dev, struct device_attribute *attr,
char *buf)
@@ -217,6 +251,28 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%ld\n", temperature);
}
static ssize_t
trip_point_temp_set(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct thermal_zone_device *tz = to_thermal_zone(dev);
int trip, ret;
long temperature;
if (!tz->ops->set_trip_temp)
return -EPERM;
if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
return -EINVAL;
if (!sscanf(buf, "%ld", &temperature))
return -EINVAL;
ret = tz->ops->set_trip_temp(tz, trip, temperature);
return ret;
}
static ssize_t
passive_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
@@ -284,30 +340,54 @@ static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
static struct device_attribute trip_point_attrs[] = {
__ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL),
__ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL),
__ATTR(trip_point_0_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_0_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_1_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_1_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_2_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_2_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_3_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_3_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_4_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_4_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_5_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_5_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_6_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_6_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_7_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_7_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_8_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_8_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_9_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_9_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_10_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_10_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
__ATTR(trip_point_11_type, 0644, trip_point_type_show,
trip_point_type_activate),
__ATTR(trip_point_11_temp, 0644, trip_point_temp_show,
trip_point_temp_set),
};
/* sys I/F for cooling device */
@@ -1049,6 +1129,29 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
if (tz->ops->notify)
tz->ops->notify(tz, count, trip_type);
break;
case THERMAL_TRIP_CONFIGURABLE_HI:
if (temp >= trip_temp)
if (tz->ops->notify)
tz->ops->notify(tz, count, trip_type);
break;
case THERMAL_TRIP_CONFIGURABLE_LOW:
if (temp <= trip_temp)
if (tz->ops->notify)
tz->ops->notify(tz, count, trip_type);
break;
case THERMAL_TRIP_CRITICAL_LOW:
if (temp <= trip_temp) {
if (tz->ops->notify)
ret = tz->ops->notify(tz, count,
trip_type);
if (!ret) {
printk(KERN_EMERG
"Critical temperature reached (%ld C), \
shutting down.\n", temp/1000);
orderly_poweroff(true);
}
}
break;
case THERMAL_TRIP_ACTIVE:
list_for_each_entry(instance, &tz->cooling_devices,
node) {

12
include/linux/thermal.h
View File

@@ -37,11 +37,19 @@ enum thermal_device_mode {
THERMAL_DEVICE_ENABLED,
};
enum thermal_trip_activation_mode {
THERMAL_TRIP_ACTIVATION_DISABLED = 0,
THERMAL_TRIP_ACTIVATION_ENABLED,
};
enum thermal_trip_type {
THERMAL_TRIP_ACTIVE = 0,
THERMAL_TRIP_PASSIVE,
THERMAL_TRIP_HOT,
THERMAL_TRIP_CRITICAL,
THERMAL_TRIP_CONFIGURABLE_HI,
THERMAL_TRIP_CONFIGURABLE_LOW,
THERMAL_TRIP_CRITICAL_LOW,
};
struct thermal_zone_device_ops {
@@ -56,8 +64,12 @@ struct thermal_zone_device_ops {
enum thermal_device_mode);
int (*get_trip_type) (struct thermal_zone_device *, int,
enum thermal_trip_type *);
int (*activate_trip_type) (struct thermal_zone_device *, int,
enum thermal_trip_activation_mode);
int (*get_trip_temp) (struct thermal_zone_device *, int,
unsigned long *);
int (*set_trip_temp) (struct thermal_zone_device *, int,
long);
int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
int (*notify) (struct thermal_zone_device *, int,
enum thermal_trip_type);