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-rw-r--r--Documentation/thermal/sysfs-api.txt22
-rw-r--r--drivers/acpi/thermal.c12
-rw-r--r--drivers/thermal/Kconfig1
-rw-r--r--drivers/thermal/thermal.c169
4 files changed, 162 insertions, 42 deletions
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index ba9c2da5a8c..d9f28be7540 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -143,10 +143,10 @@ type Strings which represent the thermal zone type.
This is given by thermal zone driver as part of registration.
Eg: "ACPI thermal zone" indicates it's a ACPI thermal device
RO
- Optional
+ Required
temp Current temperature as reported by thermal zone (sensor)
- Unit: degree Celsius
+ Unit: millidegree Celsius
RO
Required
@@ -163,7 +163,7 @@ mode One of the predefined values in [kernel, user]
charge of the thermal management.
trip_point_[0-*]_temp The temperature above which trip point will be fired
- Unit: degree Celsius
+ Unit: millidegree Celsius
RO
Optional
@@ -193,7 +193,7 @@ type String which represents the type of device
eg. For memory controller device on intel_menlow platform:
this should be "Memory controller"
RO
- Optional
+ Required
max_state The maximum permissible cooling state of this cooling device.
RO
@@ -219,16 +219,16 @@ the sys I/F structure will be built like this:
|thermal_zone1:
|-----type: ACPI thermal zone
- |-----temp: 37
+ |-----temp: 37000
|-----mode: kernel
- |-----trip_point_0_temp: 100
+ |-----trip_point_0_temp: 100000
|-----trip_point_0_type: critical
- |-----trip_point_1_temp: 80
+ |-----trip_point_1_temp: 80000
|-----trip_point_1_type: passive
- |-----trip_point_2_temp: 70
- |-----trip_point_2_type: active[0]
- |-----trip_point_3_temp: 60
- |-----trip_point_3_type: active[1]
+ |-----trip_point_2_temp: 70000
+ |-----trip_point_2_type: active0
+ |-----trip_point_3_temp: 60000
+ |-----trip_point_3_type: active1
|-----cdev0: --->/sys/class/thermal/cooling_device0
|-----cdev0_trip_point: 1 /* cdev0 can be used for passive */
|-----cdev1: --->/sys/class/thermal/cooling_device3
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 8d4b79b4f93..c4e00ac8ea8 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -879,6 +879,8 @@ static void acpi_thermal_check(void *data)
}
/* sys I/F for generic thermal sysfs support */
+#define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
+
static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
{
struct acpi_thermal *tz = thermal->devdata;
@@ -886,7 +888,7 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
if (!tz)
return -EINVAL;
- return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(tz->temperature));
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature));
}
static const char enabled[] = "kernel";
@@ -980,21 +982,21 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
if (tz->trips.critical.flags.valid) {
if (!trip)
- return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
tz->trips.critical.temperature));
trip--;
}
if (tz->trips.hot.flags.valid) {
if (!trip)
- return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
tz->trips.hot.temperature));
trip--;
}
if (tz->trips.passive.flags.valid) {
if (!trip)
- return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
tz->trips.passive.temperature));
trip--;
}
@@ -1002,7 +1004,7 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
tz->trips.active[i].flags.valid; i++) {
if (!trip)
- return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
tz->trips.active[i].temperature));
trip--;
}
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 69f19f22487..3ab313ed441 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -4,6 +4,7 @@
menuconfig THERMAL
bool "Generic Thermal sysfs driver"
+ select HWMON
default y
help
Generic Thermal Sysfs driver offers a generic mechanism for
diff --git a/drivers/thermal/thermal.c b/drivers/thermal/thermal.c
index 8b86e53ccf7..41bd4c805ac 100644
--- a/drivers/thermal/thermal.c
+++ b/drivers/thermal/thermal.c
@@ -30,8 +30,10 @@
#include <linux/idr.h>
#include <linux/thermal.h>
#include <linux/spinlock.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
-MODULE_AUTHOR("Zhang Rui")
+MODULE_AUTHOR("Zhang Rui");
MODULE_DESCRIPTION("Generic thermal management sysfs support");
MODULE_LICENSE("GPL");
@@ -56,6 +58,9 @@ static LIST_HEAD(thermal_tz_list);
static LIST_HEAD(thermal_cdev_list);
static DEFINE_MUTEX(thermal_list_lock);
+static struct device *thermal_hwmon;
+#define MAX_THERMAL_ZONES 10
+
static int get_idr(struct idr *idr, struct mutex *lock, int *id)
{
int err;
@@ -87,7 +92,67 @@ static void release_idr(struct idr *idr, struct mutex *lock, int id)
mutex_unlock(lock);
}
-/* sys I/F for thermal zone */
+/* hwmon sys I/F*/
+static ssize_t
+name_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "thermal_sys_class\n");
+}
+
+static ssize_t
+temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct thermal_zone_device *tz;
+ struct sensor_device_attribute *sensor_attr
+ = to_sensor_dev_attr(attr);
+
+ list_for_each_entry(tz, &thermal_tz_list, node)
+ if (tz->id == sensor_attr->index)
+ return tz->ops->get_temp(tz, buf);
+
+ return -ENODEV;
+}
+
+static ssize_t
+temp_crit_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct thermal_zone_device *tz;
+ struct sensor_device_attribute *sensor_attr
+ = to_sensor_dev_attr(attr);
+
+ list_for_each_entry(tz, &thermal_tz_list, node)
+ if (tz->id == sensor_attr->index)
+ return tz->ops->get_trip_temp(tz, 0, buf);
+
+ return -ENODEV;
+}
+
+static DEVICE_ATTR(name, 0444, name_show, NULL);
+static struct sensor_device_attribute sensor_attrs[] = {
+ SENSOR_ATTR(temp1_input, 0444, temp_input_show, NULL, 0),
+ SENSOR_ATTR(temp1_crit, 0444, temp_crit_show, NULL, 0),
+ SENSOR_ATTR(temp2_input, 0444, temp_input_show, NULL, 1),
+ SENSOR_ATTR(temp2_crit, 0444, temp_crit_show, NULL, 1),
+ SENSOR_ATTR(temp3_input, 0444, temp_input_show, NULL, 2),
+ SENSOR_ATTR(temp3_crit, 0444, temp_crit_show, NULL, 2),
+ SENSOR_ATTR(temp4_input, 0444, temp_input_show, NULL, 3),
+ SENSOR_ATTR(temp4_crit, 0444, temp_crit_show, NULL, 3),
+ SENSOR_ATTR(temp5_input, 0444, temp_input_show, NULL, 4),
+ SENSOR_ATTR(temp5_crit, 0444, temp_crit_show, NULL, 4),
+ SENSOR_ATTR(temp6_input, 0444, temp_input_show, NULL, 5),
+ SENSOR_ATTR(temp6_crit, 0444, temp_crit_show, NULL, 5),
+ SENSOR_ATTR(temp7_input, 0444, temp_input_show, NULL, 6),
+ SENSOR_ATTR(temp7_crit, 0444, temp_crit_show, NULL, 6),
+ SENSOR_ATTR(temp8_input, 0444, temp_input_show, NULL, 7),
+ SENSOR_ATTR(temp8_crit, 0444, temp_crit_show, NULL, 7),
+ SENSOR_ATTR(temp9_input, 0444, temp_input_show, NULL, 8),
+ SENSOR_ATTR(temp9_crit, 0444, temp_crit_show, NULL, 8),
+ SENSOR_ATTR(temp10_input, 0444, temp_input_show, NULL, 9),
+ SENSOR_ATTR(temp10_crit, 0444, temp_crit_show, NULL, 9),
+};
+
+/* thermal zone sys I/F */
#define to_thermal_zone(_dev) \
container_of(_dev, struct thermal_zone_device, device)
@@ -214,7 +279,7 @@ do { \
device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \
} while (0)
-/* sys I/F for cooling device */
+/* cooling device sys I/F */
#define to_cooling_device(_dev) \
container_of(_dev, struct thermal_cooling_device, device)
@@ -447,6 +512,9 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
struct thermal_zone_device *pos;
int result;
+ if (!type)
+ return ERR_PTR(-EINVAL);
+
if (strlen(type) >= THERMAL_NAME_LENGTH)
return ERR_PTR(-EINVAL);
@@ -477,11 +545,9 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
}
/* sys I/F */
- if (type) {
- result = device_create_file(&cdev->device, &dev_attr_cdev_type);
- if (result)
- goto unregister;
- }
+ result = device_create_file(&cdev->device, &dev_attr_cdev_type);
+ if (result)
+ goto unregister;
result = device_create_file(&cdev->device, &dev_attr_max_state);
if (result)
@@ -547,8 +613,8 @@ void thermal_cooling_device_unregister(struct
tz->ops->unbind(tz, cdev);
}
mutex_unlock(&thermal_list_lock);
- if (cdev->type[0])
- device_remove_file(&cdev->device, &dev_attr_cdev_type);
+
+ device_remove_file(&cdev->device, &dev_attr_cdev_type);
device_remove_file(&cdev->device, &dev_attr_max_state);
device_remove_file(&cdev->device, &dev_attr_cur_state);
@@ -580,6 +646,9 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
int result;
int count;
+ if (!type)
+ return ERR_PTR(-EINVAL);
+
if (strlen(type) >= THERMAL_NAME_LENGTH)
return ERR_PTR(-EINVAL);
@@ -601,6 +670,13 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
kfree(tz);
return ERR_PTR(result);
}
+ if (tz->id >= MAX_THERMAL_ZONES) {
+ printk(KERN_ERR PREFIX
+ "Too many thermal zones\n");
+ release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
+ kfree(tz);
+ return ERR_PTR(-EINVAL);
+ }
strcpy(tz->type, type);
tz->ops = ops;
@@ -615,13 +691,28 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
return ERR_PTR(result);
}
- /* sys I/F */
- if (type) {
- result = device_create_file(&tz->device, &dev_attr_type);
- if (result)
- goto unregister;
+ /* hwmon sys I/F */
+ result = device_create_file(thermal_hwmon,
+ &sensor_attrs[tz->id * 2].dev_attr);
+ if (result)
+ goto unregister;
+
+ if (trips > 0) {
+ char buf[40];
+ result = tz->ops->get_trip_type(tz, 0, buf);
+ if (result > 0 && !strcmp(buf, "critical\n")) {
+ result = device_create_file(thermal_hwmon,
+ &sensor_attrs[tz->id * 2 + 1].dev_attr);
+ if (result)
+ goto unregister;
+ }
}
+ /* sys I/F */
+ result = device_create_file(&tz->device, &dev_attr_type);
+ if (result)
+ goto unregister;
+
result = device_create_file(&tz->device, &dev_attr_temp);
if (result)
goto unregister;
@@ -687,8 +778,17 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
tz->ops->unbind(tz, cdev);
mutex_unlock(&thermal_list_lock);
- if (tz->type[0])
- device_remove_file(&tz->device, &dev_attr_type);
+ device_remove_file(thermal_hwmon,
+ &sensor_attrs[tz->id * 2].dev_attr);
+ if (tz->trips > 0) {
+ char buf[40];
+ if (tz->ops->get_trip_type(tz, 0, buf) > 0)
+ if (!strcmp(buf, "critical\n"))
+ device_remove_file(thermal_hwmon,
+ &sensor_attrs[tz->id * 2 + 1].dev_attr);
+ }
+
+ device_remove_file(&tz->device, &dev_attr_type);
device_remove_file(&tz->device, &dev_attr_temp);
if (tz->ops->get_mode)
device_remove_file(&tz->device, &dev_attr_mode);
@@ -705,6 +805,19 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
EXPORT_SYMBOL(thermal_zone_device_unregister);
+static void thermal_exit(void)
+{
+ if (thermal_hwmon) {
+ device_remove_file(thermal_hwmon, &dev_attr_name);
+ hwmon_device_unregister(thermal_hwmon);
+ }
+ class_unregister(&thermal_class);
+ idr_destroy(&thermal_tz_idr);
+ idr_destroy(&thermal_cdev_idr);
+ mutex_destroy(&thermal_idr_lock);
+ mutex_destroy(&thermal_list_lock);
+}
+
static int __init thermal_init(void)
{
int result = 0;
@@ -716,16 +829,20 @@ static int __init thermal_init(void)
mutex_destroy(&thermal_idr_lock);
mutex_destroy(&thermal_list_lock);
}
- return result;
-}
-static void __exit thermal_exit(void)
-{
- class_unregister(&thermal_class);
- idr_destroy(&thermal_tz_idr);
- idr_destroy(&thermal_cdev_idr);
- mutex_destroy(&thermal_idr_lock);
- mutex_destroy(&thermal_list_lock);
+ thermal_hwmon = hwmon_device_register(NULL);
+ if (IS_ERR(thermal_hwmon)) {
+ result = PTR_ERR(thermal_hwmon);
+ thermal_hwmon = NULL;
+ printk(KERN_ERR PREFIX
+ "unable to register hwmon device\n");
+ thermal_exit();
+ return result;
+ }
+
+ result = device_create_file(thermal_hwmon, &dev_attr_name);
+
+ return result;
}
subsys_initcall(thermal_init);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 21:41:55 +0000