diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-26 14:28:55 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-26 14:28:55 -0700 |
commit | 476525004ac7e2f990b6956efcd44d0780c2ab4c (patch) | |
tree | 158cd2bbfb232b4f4327b6c20a4e14c6b095a438 /drivers/thermal/thermal_sys.c | |
parent | bd22dc17e49973d3d4925970260e9e37f7580a9f (diff) | |
parent | ec033d0a02901551346b9f43f8ff9bad51378891 (diff) | |
download | linux-476525004ac7e2f990b6956efcd44d0780c2ab4c.tar.bz2 |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull ACPI & power management update from Len Brown:
"Re-write of the turbostat tool.
lower overhead was necessary for measuring very large system when
they are very idle.
IVB support in intel_idle
It's what I run on my IVB, others should be able to also:-)
ACPICA core update
We have found some bugs due to divergence between Linux and the
upstream ACPICA base. Most of these patches are to reduce that
divergence to reduce the risk of future bugs.
Some cpuidle updates, mostly for non-Intel
More will be coming, as they depend on this part.
Some thermal management changes needed by non-ACPI systems.
Some _OST (OS Status Indication) updates for hot ACPI hot-plug."
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (51 commits)
Thermal: Documentation update
Thermal: Add Hysteresis attributes
Thermal: Make Thermal trip points writeable
ACPI/AC: prevent OOPS on some boxes due to missing check power_supply_register() return value check
tools/power: turbostat: fix large c1% issue
tools/power: turbostat v2 - re-write for efficiency
ACPICA: Update to version 20120711
ACPICA: AcpiSrc: Fix some translation issues for Linux conversion
ACPICA: Update header files copyrights to 2012
ACPICA: Add new ACPI table load/unload external interfaces
ACPICA: Split file: tbxface.c -> tbxfload.c
ACPICA: Add PCC address space to space ID decode function
ACPICA: Fix some comment fields
ACPICA: Table manager: deploy new firmware error/warning interfaces
ACPICA: Add new interfaces for BIOS(firmware) errors and warnings
ACPICA: Split exception code utilities to a new file, utexcep.c
ACPI: acpi_pad: tune round_robin_time
ACPICA: Update to version 20120620
ACPICA: Add support for implicit notify on multiple devices
ACPICA: Update comments; no functional change
...
Diffstat (limited to 'drivers/thermal/thermal_sys.c')
-rw-r--r-- | drivers/thermal/thermal_sys.c | 223 |
1 files changed, 179 insertions, 44 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 022bacb71a7e..2d7a9fe8f365 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -196,6 +196,28 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr, } static ssize_t +trip_point_temp_store(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; + unsigned long temperature; + + if (!tz->ops->set_trip_temp) + return -EPERM; + + if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) + return -EINVAL; + + if (kstrtoul(buf, 10, &temperature)) + return -EINVAL; + + ret = tz->ops->set_trip_temp(tz, trip, temperature); + + return ret ? ret : count; +} + +static ssize_t trip_point_temp_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -218,6 +240,52 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr, } static ssize_t +trip_point_hyst_store(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; + unsigned long temperature; + + if (!tz->ops->set_trip_hyst) + return -EPERM; + + if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) + return -EINVAL; + + if (kstrtoul(buf, 10, &temperature)) + return -EINVAL; + + /* + * We are not doing any check on the 'temperature' value + * here. The driver implementing 'set_trip_hyst' has to + * take care of this. + */ + ret = tz->ops->set_trip_hyst(tz, trip, temperature); + + return ret ? ret : count; +} + +static ssize_t +trip_point_hyst_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + int trip, ret; + unsigned long temperature; + + if (!tz->ops->get_trip_hyst) + return -EPERM; + + if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) + return -EINVAL; + + ret = tz->ops->get_trip_hyst(tz, trip, &temperature); + + return ret ? ret : sprintf(buf, "%ld\n", temperature); +} + +static ssize_t passive_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { @@ -283,33 +351,6 @@ 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 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), -}; - /* sys I/F for cooling device */ #define to_cooling_device(_dev) \ container_of(_dev, struct thermal_cooling_device, device) @@ -1089,9 +1130,113 @@ leave: EXPORT_SYMBOL(thermal_zone_device_update); /** + * create_trip_attrs - create attributes for trip points + * @tz: the thermal zone device + * @mask: Writeable trip point bitmap. + */ +static int create_trip_attrs(struct thermal_zone_device *tz, int mask) +{ + int indx; + int size = sizeof(struct thermal_attr) * tz->trips; + + tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); + if (!tz->trip_type_attrs) + return -ENOMEM; + + tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); + if (!tz->trip_temp_attrs) { + kfree(tz->trip_type_attrs); + return -ENOMEM; + } + + if (tz->ops->get_trip_hyst) { + tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); + if (!tz->trip_hyst_attrs) { + kfree(tz->trip_type_attrs); + kfree(tz->trip_temp_attrs); + return -ENOMEM; + } + } + + + for (indx = 0; indx < tz->trips; indx++) { + /* create trip type attribute */ + snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, + "trip_point_%d_type", indx); + + sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); + tz->trip_type_attrs[indx].attr.attr.name = + tz->trip_type_attrs[indx].name; + tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; + tz->trip_type_attrs[indx].attr.show = trip_point_type_show; + + device_create_file(&tz->device, + &tz->trip_type_attrs[indx].attr); + + /* create trip temp attribute */ + snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, + "trip_point_%d_temp", indx); + + sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); + tz->trip_temp_attrs[indx].attr.attr.name = + tz->trip_temp_attrs[indx].name; + tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; + tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; + if (mask & (1 << indx)) { + tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; + tz->trip_temp_attrs[indx].attr.store = + trip_point_temp_store; + } + + device_create_file(&tz->device, + &tz->trip_temp_attrs[indx].attr); + + /* create Optional trip hyst attribute */ + if (!tz->ops->get_trip_hyst) + continue; + snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, + "trip_point_%d_hyst", indx); + + sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); + tz->trip_hyst_attrs[indx].attr.attr.name = + tz->trip_hyst_attrs[indx].name; + tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; + tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; + if (tz->ops->set_trip_hyst) { + tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; + tz->trip_hyst_attrs[indx].attr.store = + trip_point_hyst_store; + } + + device_create_file(&tz->device, + &tz->trip_hyst_attrs[indx].attr); + } + return 0; +} + +static void remove_trip_attrs(struct thermal_zone_device *tz) +{ + int indx; + + for (indx = 0; indx < tz->trips; indx++) { + device_remove_file(&tz->device, + &tz->trip_type_attrs[indx].attr); + device_remove_file(&tz->device, + &tz->trip_temp_attrs[indx].attr); + if (tz->ops->get_trip_hyst) + device_remove_file(&tz->device, + &tz->trip_hyst_attrs[indx].attr); + } + kfree(tz->trip_type_attrs); + kfree(tz->trip_temp_attrs); + kfree(tz->trip_hyst_attrs); +} + +/** * thermal_zone_device_register - register a new thermal zone device * @type: the thermal zone device type * @trips: the number of trip points the thermal zone support + * @mask: a bit string indicating the writeablility of trip points * @devdata: private device data * @ops: standard thermal zone device callbacks * @tc1: thermal coefficient 1 for passive calculations @@ -1107,7 +1252,7 @@ EXPORT_SYMBOL(thermal_zone_device_update); * section 11.1.5.1 of the ACPI specification 3.0. */ struct thermal_zone_device *thermal_zone_device_register(char *type, - int trips, void *devdata, + int trips, int mask, void *devdata, const struct thermal_zone_device_ops *ops, int tc1, int tc2, int passive_delay, int polling_delay) { @@ -1121,7 +1266,7 @@ struct thermal_zone_device *thermal_zone_device_register(char *type, if (strlen(type) >= THERMAL_NAME_LENGTH) return ERR_PTR(-EINVAL); - if (trips > THERMAL_MAX_TRIPS || trips < 0) + if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) return ERR_PTR(-EINVAL); if (!ops || !ops->get_temp) @@ -1175,15 +1320,11 @@ struct thermal_zone_device *thermal_zone_device_register(char *type, goto unregister; } + result = create_trip_attrs(tz, mask); + if (result) + goto unregister; + for (count = 0; count < trips; count++) { - result = device_create_file(&tz->device, - &trip_point_attrs[count * 2]); - if (result) - break; - result = device_create_file(&tz->device, - &trip_point_attrs[count * 2 + 1]); - if (result) - goto unregister; tz->ops->get_trip_type(tz, count, &trip_type); if (trip_type == THERMAL_TRIP_PASSIVE) passive = 1; @@ -1232,7 +1373,6 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) { struct thermal_cooling_device *cdev; struct thermal_zone_device *pos = NULL; - int count; if (!tz) return; @@ -1259,13 +1399,8 @@ 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); + remove_trip_attrs(tz); - for (count = 0; count < tz->trips; count++) { - device_remove_file(&tz->device, - &trip_point_attrs[count * 2]); - device_remove_file(&tz->device, - &trip_point_attrs[count * 2 + 1]); - } thermal_remove_hwmon_sysfs(tz); release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); idr_destroy(&tz->idr); |