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https://github.com/torvalds/linux
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thermal: fix generic thermal I/F for hwmon
Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhang, Rui
Len Brown
parent
baadac8b10
commit
3152fb9f11
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@ -143,10 +143,10 @@ type Strings which represent the thermal zone type.
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This is given by thermal zone driver as part of registration.
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Eg: "ACPI thermal zone" indicates it's a ACPI thermal device
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RO
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Optional
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Required
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temp Current temperature as reported by thermal zone (sensor)
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Unit: degree Celsius
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Unit: millidegree Celsius
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RO
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Required
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@ -163,7 +163,7 @@ mode One of the predefined values in [kernel, user]
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charge of the thermal management.
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trip_point_[0-*]_temp The temperature above which trip point will be fired
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Unit: degree Celsius
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Unit: millidegree Celsius
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RO
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Optional
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@ -193,7 +193,7 @@ type String which represents the type of device
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eg. For memory controller device on intel_menlow platform:
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this should be "Memory controller"
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RO
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Optional
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Required
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max_state The maximum permissible cooling state of this cooling device.
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RO
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@ -219,16 +219,16 @@ the sys I/F structure will be built like this:
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|thermal_zone1:
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|-----type: ACPI thermal zone
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|-----temp: 37
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|-----temp: 37000
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|-----mode: kernel
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|-----trip_point_0_temp: 100
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|-----trip_point_0_temp: 100000
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|-----trip_point_0_type: critical
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|-----trip_point_1_temp: 80
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|-----trip_point_1_temp: 80000
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|-----trip_point_1_type: passive
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|-----trip_point_2_temp: 70
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|-----trip_point_2_type: active[0]
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|-----trip_point_3_temp: 60
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|-----trip_point_3_type: active[1]
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|-----trip_point_2_temp: 70000
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|-----trip_point_2_type: active0
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|-----trip_point_3_temp: 60000
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|-----trip_point_3_type: active1
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|-----cdev0: --->/sys/class/thermal/cooling_device0
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|-----cdev0_trip_point: 1 /* cdev0 can be used for passive */
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|-----cdev1: --->/sys/class/thermal/cooling_device3
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@ -4,6 +4,7 @@
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menuconfig THERMAL
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bool "Generic Thermal sysfs driver"
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select HWMON
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default y
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help
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Generic Thermal Sysfs driver offers a generic mechanism for
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@ -30,8 +30,10 @@
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#include <linux/idr.h>
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#include <linux/thermal.h>
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#include <linux/spinlock.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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MODULE_AUTHOR("Zhang Rui")
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MODULE_AUTHOR("Zhang Rui");
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MODULE_DESCRIPTION("Generic thermal management sysfs support");
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MODULE_LICENSE("GPL");
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@ -56,6 +58,9 @@ static LIST_HEAD(thermal_tz_list);
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static LIST_HEAD(thermal_cdev_list);
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static DEFINE_MUTEX(thermal_list_lock);
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static struct device *thermal_hwmon;
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#define MAX_THERMAL_ZONES 10
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static int get_idr(struct idr *idr, struct mutex *lock, int *id)
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{
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int err;
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@ -87,7 +92,67 @@ static void release_idr(struct idr *idr, struct mutex *lock, int id)
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mutex_unlock(lock);
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}
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/* sys I/F for thermal zone */
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/* hwmon sys I/F*/
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static ssize_t
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name_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "thermal_sys_class\n");
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}
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static ssize_t
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temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct thermal_zone_device *tz;
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struct sensor_device_attribute *sensor_attr
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= to_sensor_dev_attr(attr);
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list_for_each_entry(tz, &thermal_tz_list, node)
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if (tz->id == sensor_attr->index)
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return tz->ops->get_temp(tz, buf);
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return -ENODEV;
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}
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static ssize_t
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temp_crit_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct thermal_zone_device *tz;
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struct sensor_device_attribute *sensor_attr
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= to_sensor_dev_attr(attr);
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list_for_each_entry(tz, &thermal_tz_list, node)
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if (tz->id == sensor_attr->index)
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return tz->ops->get_trip_temp(tz, 0, buf);
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return -ENODEV;
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}
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static DEVICE_ATTR(name, 0444, name_show, NULL);
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static struct sensor_device_attribute sensor_attrs[] = {
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SENSOR_ATTR(temp1_input, 0444, temp_input_show, NULL, 0),
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SENSOR_ATTR(temp1_crit, 0444, temp_crit_show, NULL, 0),
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SENSOR_ATTR(temp2_input, 0444, temp_input_show, NULL, 1),
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SENSOR_ATTR(temp2_crit, 0444, temp_crit_show, NULL, 1),
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SENSOR_ATTR(temp3_input, 0444, temp_input_show, NULL, 2),
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SENSOR_ATTR(temp3_crit, 0444, temp_crit_show, NULL, 2),
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SENSOR_ATTR(temp4_input, 0444, temp_input_show, NULL, 3),
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SENSOR_ATTR(temp4_crit, 0444, temp_crit_show, NULL, 3),
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SENSOR_ATTR(temp5_input, 0444, temp_input_show, NULL, 4),
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SENSOR_ATTR(temp5_crit, 0444, temp_crit_show, NULL, 4),
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SENSOR_ATTR(temp6_input, 0444, temp_input_show, NULL, 5),
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SENSOR_ATTR(temp6_crit, 0444, temp_crit_show, NULL, 5),
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SENSOR_ATTR(temp7_input, 0444, temp_input_show, NULL, 6),
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SENSOR_ATTR(temp7_crit, 0444, temp_crit_show, NULL, 6),
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SENSOR_ATTR(temp8_input, 0444, temp_input_show, NULL, 7),
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SENSOR_ATTR(temp8_crit, 0444, temp_crit_show, NULL, 7),
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SENSOR_ATTR(temp9_input, 0444, temp_input_show, NULL, 8),
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SENSOR_ATTR(temp9_crit, 0444, temp_crit_show, NULL, 8),
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SENSOR_ATTR(temp10_input, 0444, temp_input_show, NULL, 9),
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SENSOR_ATTR(temp10_crit, 0444, temp_crit_show, NULL, 9),
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};
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/* thermal zone sys I/F */
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#define to_thermal_zone(_dev) \
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container_of(_dev, struct thermal_zone_device, device)
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@ -214,7 +279,7 @@ do { \
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device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \
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} while (0)
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/* sys I/F for cooling device */
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/* cooling device sys I/F */
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#define to_cooling_device(_dev) \
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container_of(_dev, struct thermal_cooling_device, device)
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@ -447,6 +512,9 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
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struct thermal_zone_device *pos;
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int result;
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if (!type)
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return ERR_PTR(-EINVAL);
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if (strlen(type) >= THERMAL_NAME_LENGTH)
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return ERR_PTR(-EINVAL);
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@ -477,11 +545,9 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
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}
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/* sys I/F */
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if (type) {
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result = device_create_file(&cdev->device, &dev_attr_cdev_type);
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if (result)
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goto unregister;
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}
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result = device_create_file(&cdev->device, &dev_attr_cdev_type);
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if (result)
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goto unregister;
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result = device_create_file(&cdev->device, &dev_attr_max_state);
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if (result)
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@ -547,8 +613,8 @@ void thermal_cooling_device_unregister(struct
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tz->ops->unbind(tz, cdev);
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}
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mutex_unlock(&thermal_list_lock);
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if (cdev->type[0])
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device_remove_file(&cdev->device, &dev_attr_cdev_type);
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device_remove_file(&cdev->device, &dev_attr_cdev_type);
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device_remove_file(&cdev->device, &dev_attr_max_state);
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device_remove_file(&cdev->device, &dev_attr_cur_state);
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@ -580,6 +646,9 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
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int result;
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int count;
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if (!type)
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return ERR_PTR(-EINVAL);
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if (strlen(type) >= THERMAL_NAME_LENGTH)
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return ERR_PTR(-EINVAL);
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@ -601,6 +670,13 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
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kfree(tz);
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return ERR_PTR(result);
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}
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if (tz->id >= MAX_THERMAL_ZONES) {
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printk(KERN_ERR PREFIX
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"Too many thermal zones\n");
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release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
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kfree(tz);
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return ERR_PTR(-EINVAL);
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}
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strcpy(tz->type, type);
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tz->ops = ops;
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@ -615,13 +691,28 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
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return ERR_PTR(result);
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}
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/* sys I/F */
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if (type) {
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result = device_create_file(&tz->device, &dev_attr_type);
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if (result)
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goto unregister;
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/* hwmon sys I/F */
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result = device_create_file(thermal_hwmon,
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&sensor_attrs[tz->id * 2].dev_attr);
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if (result)
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goto unregister;
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if (trips > 0) {
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char buf[40];
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result = tz->ops->get_trip_type(tz, 0, buf);
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if (result > 0 && !strcmp(buf, "critical\n")) {
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result = device_create_file(thermal_hwmon,
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&sensor_attrs[tz->id * 2 + 1].dev_attr);
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if (result)
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goto unregister;
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}
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}
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/* sys I/F */
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result = device_create_file(&tz->device, &dev_attr_type);
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if (result)
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goto unregister;
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result = device_create_file(&tz->device, &dev_attr_temp);
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if (result)
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goto unregister;
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@ -687,8 +778,17 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
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tz->ops->unbind(tz, cdev);
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mutex_unlock(&thermal_list_lock);
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if (tz->type[0])
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device_remove_file(&tz->device, &dev_attr_type);
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device_remove_file(thermal_hwmon,
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&sensor_attrs[tz->id * 2].dev_attr);
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if (tz->trips > 0) {
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char buf[40];
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if (tz->ops->get_trip_type(tz, 0, buf) > 0)
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if (!strcmp(buf, "critical\n"))
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device_remove_file(thermal_hwmon,
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&sensor_attrs[tz->id * 2 + 1].dev_attr);
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}
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device_remove_file(&tz->device, &dev_attr_type);
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device_remove_file(&tz->device, &dev_attr_temp);
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if (tz->ops->get_mode)
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device_remove_file(&tz->device, &dev_attr_mode);
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@ -705,6 +805,19 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
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EXPORT_SYMBOL(thermal_zone_device_unregister);
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static void thermal_exit(void)
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{
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if (thermal_hwmon) {
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device_remove_file(thermal_hwmon, &dev_attr_name);
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hwmon_device_unregister(thermal_hwmon);
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}
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class_unregister(&thermal_class);
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idr_destroy(&thermal_tz_idr);
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idr_destroy(&thermal_cdev_idr);
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mutex_destroy(&thermal_idr_lock);
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mutex_destroy(&thermal_list_lock);
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}
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static int __init thermal_init(void)
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{
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int result = 0;
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@ -716,16 +829,20 @@ static int __init thermal_init(void)
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mutex_destroy(&thermal_idr_lock);
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mutex_destroy(&thermal_list_lock);
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}
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return result;
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}
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static void __exit thermal_exit(void)
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{
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class_unregister(&thermal_class);
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idr_destroy(&thermal_tz_idr);
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idr_destroy(&thermal_cdev_idr);
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mutex_destroy(&thermal_idr_lock);
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mutex_destroy(&thermal_list_lock);
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thermal_hwmon = hwmon_device_register(NULL);
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if (IS_ERR(thermal_hwmon)) {
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result = PTR_ERR(thermal_hwmon);
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thermal_hwmon = NULL;
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printk(KERN_ERR PREFIX
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"unable to register hwmon device\n");
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thermal_exit();
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return result;
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}
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result = device_create_file(thermal_hwmon, &dev_attr_name);
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return result;
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}
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subsys_initcall(thermal_init);
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