From: Zhang Rui Date: Tue, 22 Apr 2008 00:50:09 +0000 (+0800) Subject: thermal: update the documentation X-Git-Tag: v2.6.26-rc1~101^2~1^11~4 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9ae71078b2c8657c0e8de808b76b76049806906;p=linux-2.6 thermal: update the documentation Update the documentation for the thermal driver hwmon sys I/F. Change the ACPI thermal zone type to be consistent with hwmon. Signed-off-by: Zhang Rui Acked-by: Jean Delvare Signed-off-by: Len Brown --- diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index d9f28be754..70d68ce864 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -108,10 +108,12 @@ and throttle appropriate devices. RO read only value RW read/write value -All thermal sysfs attributes will be represented under /sys/class/thermal +Thermal sysfs attributes will be represented under /sys/class/thermal. +Hwmon sysfs I/F extension is also available under /sys/class/hwmon +if hwmon is compiled in or built as a module. Thermal zone device sys I/F, created once it's registered: -|thermal_zone[0-*]: +/sys/class/thermal/thermal_zone[0-*]: |-----type: Type of the thermal zone |-----temp: Current temperature |-----mode: Working mode of the thermal zone @@ -119,7 +121,7 @@ Thermal zone device sys I/F, created once it's registered: |-----trip_point_[0-*]_type: Trip point type Thermal cooling device sys I/F, created once it's registered: -|cooling_device[0-*]: +/sys/class/thermal/cooling_device[0-*]: |-----type : Type of the cooling device(processor/fan/...) |-----max_state: Maximum cooling state of the cooling device |-----cur_state: Current cooling state of the cooling device @@ -130,10 +132,19 @@ They represent the relationship between a thermal zone and its associated coolin They are created/removed for each thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device successful execution. -|thermal_zone[0-*] +/sys/class/thermal/thermal_zone[0-*] |-----cdev[0-*]: The [0-*]th cooling device in the current thermal zone |-----cdev[0-*]_trip_point: Trip point that cdev[0-*] is associated with +Besides the thermal zone device sysfs I/F and cooling device sysfs I/F, +the generic thermal driver also creates a hwmon sysfs I/F for each _type_ of +thermal zone device. E.g. the generic thermal driver registers one hwmon class device +and build the associated hwmon sysfs I/F for all the registered ACPI thermal zones. +/sys/class/hwmon/hwmon[0-*]: + |-----name: The type of the thermal zone devices. + |-----temp[1-*]_input: The current temperature of thermal zone [1-*]. + |-----temp[1-*]_critical: The critical trip point of thermal zone [1-*]. +Please read Documentation/hwmon/sysfs-interface for additional information. *************************** * Thermal zone attributes * @@ -141,7 +152,10 @@ thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device successful e 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 + Eg: "acpitz" indicates it's an ACPI thermal device. + In order to keep it consistent with hwmon sys attribute, + this should be a short, lowercase string, + not containing spaces nor dashes. RO Required @@ -218,7 +232,7 @@ the sys I/F structure will be built like this: /sys/class/thermal: |thermal_zone1: - |-----type: ACPI thermal zone + |-----type: acpitz |-----temp: 37000 |-----mode: kernel |-----trip_point_0_temp: 100000 @@ -243,3 +257,10 @@ the sys I/F structure will be built like this: |-----type: Fan |-----max_state: 2 |-----cur_state: 0 + +/sys/class/hwmon: + +|hwmon0: + |-----name: acpitz + |-----temp1_input: 37000 + |-----temp1_crit: 100000 diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index ec707ed1a7..5e9641c93f 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -1136,7 +1136,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].flags.valid; i++, trips++); - tz->thermal_zone = thermal_zone_device_register("ACPI thermal zone", + tz->thermal_zone = thermal_zone_device_register("acpitz", trips, tz, &acpi_thermal_zone_ops); if (IS_ERR(tz->thermal_zone)) return -ENODEV;