#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/dmi.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
-#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/kmod.h>
#include <linux/seq_file.h>
#include <linux/reboot.h>
+#include <linux/device.h>
#include <asm/uaccess.h>
-
+#include <linux/thermal.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
-#define ACPI_THERMAL_COMPONENT 0x04000000
+#define PREFIX "ACPI: "
+
#define ACPI_THERMAL_CLASS "thermal_zone"
#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
#define ACPI_THERMAL_FILE_STATE "state"
#define ACPI_THERMAL_MAX_ACTIVE 10
#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
-#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
-#define CELSIUS_TO_KELVIN(t) ((t+273)*10)
-
#define _COMPONENT ACPI_THERMAL_COMPONENT
ACPI_MODULE_NAME("thermal");
static int act;
module_param(act, int, 0644);
-MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.\n");
+MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
+
+static int crt;
+module_param(crt, int, 0644);
+MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
static int tzp;
module_param(tzp, int, 0444);
-MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
+MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
static int nocrt;
module_param(nocrt, int, 0);
-MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n");
+MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
static int off;
module_param(off, int, 0);
-MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");
+MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
static int psv;
module_param(psv, int, 0644);
-MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n");
+MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
static int acpi_thermal_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device, int type);
static int acpi_thermal_resume(struct acpi_device *device);
+static void acpi_thermal_notify(struct acpi_device *device, u32 event);
static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
.add = acpi_thermal_add,
.remove = acpi_thermal_remove,
.resume = acpi_thermal_resume,
+ .notify = acpi_thermal_notify,
},
};
struct acpi_thermal_state state;
struct acpi_thermal_trips trips;
struct acpi_handle_list devices;
- struct timer_list timer;
+ struct thermal_zone_device *thermal_zone;
+ int tz_enabled;
+ int kelvin_offset;
+ struct mutex lock;
};
static const struct file_operations acpi_thermal_state_fops = {
+ .owner = THIS_MODULE,
.open = acpi_thermal_state_open_fs,
.read = seq_read,
.llseek = seq_lseek,
};
static const struct file_operations acpi_thermal_temp_fops = {
+ .owner = THIS_MODULE,
.open = acpi_thermal_temp_open_fs,
.read = seq_read,
.llseek = seq_lseek,
};
static const struct file_operations acpi_thermal_trip_fops = {
+ .owner = THIS_MODULE,
.open = acpi_thermal_trip_open_fs,
.read = seq_read,
.llseek = seq_lseek,
};
static const struct file_operations acpi_thermal_cooling_fops = {
+ .owner = THIS_MODULE,
.open = acpi_thermal_cooling_open_fs,
.read = seq_read,
.write = acpi_thermal_write_cooling_mode,
};
static const struct file_operations acpi_thermal_polling_fops = {
+ .owner = THIS_MODULE,
.open = acpi_thermal_polling_open_fs,
.read = seq_read,
.write = acpi_thermal_write_polling,
static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
{
acpi_status status = AE_OK;
-
+ unsigned long long tmp;
if (!tz)
return -EINVAL;
tz->last_temperature = tz->temperature;
- status =
- acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature);
+ status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
if (ACPI_FAILURE(status))
return -ENODEV;
+ tz->temperature = tmp;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
tz->temperature));
static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
{
acpi_status status = AE_OK;
-
+ unsigned long long tmp;
if (!tz)
return -EINVAL;
- status =
- acpi_evaluate_integer(tz->device->handle, "_TZP", NULL,
- &tz->polling_frequency);
+ status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
if (ACPI_FAILURE(status))
return -ENODEV;
+ tz->polling_frequency = tmp;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
tz->polling_frequency));
tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
+ tz->thermal_zone->polling_delay = seconds * 1000;
+
+ if (tz->tz_enabled)
+ thermal_zone_device_update(tz->thermal_zone);
+
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Polling frequency set to %lu seconds\n",
tz->polling_frequency/10));
return 0;
}
-static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
-{
- acpi_status status = AE_OK;
- int i = 0;
+#define ACPI_TRIPS_CRITICAL 0x01
+#define ACPI_TRIPS_HOT 0x02
+#define ACPI_TRIPS_PASSIVE 0x04
+#define ACPI_TRIPS_ACTIVE 0x08
+#define ACPI_TRIPS_DEVICES 0x10
+#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
+#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
- if (!tz)
- return -EINVAL;
+#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
+ ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
+ ACPI_TRIPS_DEVICES)
- /* Critical Shutdown (required) */
+/*
+ * This exception is thrown out in two cases:
+ * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
+ * when re-evaluating the AML code.
+ * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
+ * We need to re-bind the cooling devices of a thermal zone when this occurs.
+ */
+#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
+do { \
+ if (flags != ACPI_TRIPS_INIT) \
+ ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
+ "ACPI thermal trip point %s changed\n" \
+ "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
+} while (0)
+
+static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
+{
+ acpi_status status = AE_OK;
+ unsigned long long tmp;
+ struct acpi_handle_list devices;
+ int valid = 0;
+ int i;
- status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL,
- &tz->trips.critical.temperature);
- if (ACPI_FAILURE(status)) {
- tz->trips.critical.flags.valid = 0;
- ACPI_EXCEPTION((AE_INFO, status, "No critical threshold"));
- return -ENODEV;
- } else {
- tz->trips.critical.flags.valid = 1;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Found critical threshold [%lu]\n",
- tz->trips.critical.temperature));
+ /* Critical Shutdown */
+ if (flag & ACPI_TRIPS_CRITICAL) {
+ status = acpi_evaluate_integer(tz->device->handle,
+ "_CRT", NULL, &tmp);
+ tz->trips.critical.temperature = tmp;
+ /*
+ * Treat freezing temperatures as invalid as well; some
+ * BIOSes return really low values and cause reboots at startup.
+ * Below zero (Celsius) values clearly aren't right for sure..
+ * ... so lets discard those as invalid.
+ */
+ if (ACPI_FAILURE(status)) {
+ tz->trips.critical.flags.valid = 0;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "No critical threshold\n"));
+ } else if (tmp <= 2732) {
+ printk(KERN_WARNING FW_BUG "Invalid critical threshold "
+ "(%llu)\n", tmp);
+ tz->trips.critical.flags.valid = 0;
+ } else {
+ tz->trips.critical.flags.valid = 1;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Found critical threshold [%lu]\n",
+ tz->trips.critical.temperature));
+ }
+ if (tz->trips.critical.flags.valid == 1) {
+ if (crt == -1) {
+ tz->trips.critical.flags.valid = 0;
+ } else if (crt > 0) {
+ unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
+ /*
+ * Allow override critical threshold
+ */
+ if (crt_k > tz->trips.critical.temperature)
+ printk(KERN_WARNING PREFIX
+ "Critical threshold %d C\n", crt);
+ tz->trips.critical.temperature = crt_k;
+ }
+ }
}
/* Critical Sleep (optional) */
-
- status =
- acpi_evaluate_integer(tz->device->handle, "_HOT", NULL,
- &tz->trips.hot.temperature);
- if (ACPI_FAILURE(status)) {
- tz->trips.hot.flags.valid = 0;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n"));
- } else {
- tz->trips.hot.flags.valid = 1;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n",
- tz->trips.hot.temperature));
- }
-
- /* Passive: Processors (optional) */
-
- if (psv == -1) {
- status = AE_SUPPORT;
- } else if (psv > 0) {
- tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
- status = AE_OK;
- } else {
+ if (flag & ACPI_TRIPS_HOT) {
status = acpi_evaluate_integer(tz->device->handle,
- "_PSV", NULL, &tz->trips.passive.temperature);
+ "_HOT", NULL, &tmp);
+ if (ACPI_FAILURE(status)) {
+ tz->trips.hot.flags.valid = 0;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "No hot threshold\n"));
+ } else {
+ tz->trips.hot.temperature = tmp;
+ tz->trips.hot.flags.valid = 1;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Found hot threshold [%lu]\n",
+ tz->trips.critical.temperature));
+ }
}
- if (ACPI_FAILURE(status)) {
- tz->trips.passive.flags.valid = 0;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
- } else {
- tz->trips.passive.flags.valid = 1;
-
- status =
- acpi_evaluate_integer(tz->device->handle, "_TC1", NULL,
- &tz->trips.passive.tc1);
- if (ACPI_FAILURE(status))
- tz->trips.passive.flags.valid = 0;
-
- status =
- acpi_evaluate_integer(tz->device->handle, "_TC2", NULL,
- &tz->trips.passive.tc2);
- if (ACPI_FAILURE(status))
- tz->trips.passive.flags.valid = 0;
+ /* Passive (optional) */
+ if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
+ (flag == ACPI_TRIPS_INIT)) {
+ valid = tz->trips.passive.flags.valid;
+ if (psv == -1) {
+ status = AE_SUPPORT;
+ } else if (psv > 0) {
+ tmp = CELSIUS_TO_KELVIN(psv);
+ status = AE_OK;
+ } else {
+ status = acpi_evaluate_integer(tz->device->handle,
+ "_PSV", NULL, &tmp);
+ }
- status =
- acpi_evaluate_integer(tz->device->handle, "_TSP", NULL,
- &tz->trips.passive.tsp);
if (ACPI_FAILURE(status))
tz->trips.passive.flags.valid = 0;
-
- status =
- acpi_evaluate_reference(tz->device->handle, "_PSL", NULL,
- &tz->trips.passive.devices);
- if (ACPI_FAILURE(status))
+ else {
+ tz->trips.passive.temperature = tmp;
+ tz->trips.passive.flags.valid = 1;
+ if (flag == ACPI_TRIPS_INIT) {
+ status = acpi_evaluate_integer(
+ tz->device->handle, "_TC1",
+ NULL, &tmp);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+ else
+ tz->trips.passive.tc1 = tmp;
+ status = acpi_evaluate_integer(
+ tz->device->handle, "_TC2",
+ NULL, &tmp);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+ else
+ tz->trips.passive.tc2 = tmp;
+ status = acpi_evaluate_integer(
+ tz->device->handle, "_TSP",
+ NULL, &tmp);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+ else
+ tz->trips.passive.tsp = tmp;
+ }
+ }
+ }
+ if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
+ memset(&devices, 0, sizeof(struct acpi_handle_list));
+ status = acpi_evaluate_reference(tz->device->handle, "_PSL",
+ NULL, &devices);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_WARNING PREFIX
+ "Invalid passive threshold\n");
tz->trips.passive.flags.valid = 0;
-
- if (!tz->trips.passive.flags.valid)
- printk(KERN_WARNING PREFIX "Invalid passive threshold\n");
+ }
else
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Found passive threshold [%lu]\n",
- tz->trips.passive.temperature));
- }
+ tz->trips.passive.flags.valid = 1;
- /* Active: Fans, etc. (optional) */
+ if (memcmp(&tz->trips.passive.devices, &devices,
+ sizeof(struct acpi_handle_list))) {
+ memcpy(&tz->trips.passive.devices, &devices,
+ sizeof(struct acpi_handle_list));
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+ }
+ }
+ if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
+ if (valid != tz->trips.passive.flags.valid)
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
+ }
+ /* Active (optional) */
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-
char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
+ valid = tz->trips.active[i].flags.valid;
if (act == -1)
- break; /* disable all active trip points */
-
- status = acpi_evaluate_integer(tz->device->handle,
- name, NULL, &tz->trips.active[i].temperature);
-
- if (ACPI_FAILURE(status)) {
- if (i == 0) /* no active trip points */
- break;
- if (act <= 0) /* no override requested */
+ break; /* disable all active trip points */
+
+ if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
+ tz->trips.active[i].flags.valid)) {
+ status = acpi_evaluate_integer(tz->device->handle,
+ name, NULL, &tmp);
+ if (ACPI_FAILURE(status)) {
+ tz->trips.active[i].flags.valid = 0;
+ if (i == 0)
+ break;
+ if (act <= 0)
+ break;
+ if (i == 1)
+ tz->trips.active[0].temperature =
+ CELSIUS_TO_KELVIN(act);
+ else
+ /*
+ * Don't allow override higher than
+ * the next higher trip point
+ */
+ tz->trips.active[i - 1].temperature =
+ (tz->trips.active[i - 2].temperature <
+ CELSIUS_TO_KELVIN(act) ?
+ tz->trips.active[i - 2].temperature :
+ CELSIUS_TO_KELVIN(act));
break;
- if (i == 1) { /* 1 trip point */
- tz->trips.active[0].temperature =
- CELSIUS_TO_KELVIN(act);
- } else { /* multiple trips */
- /*
- * Don't allow override higher than
- * the next higher trip point
- */
- tz->trips.active[i - 1].temperature =
- (tz->trips.active[i - 2].temperature <
- CELSIUS_TO_KELVIN(act) ?
- tz->trips.active[i - 2].temperature :
- CELSIUS_TO_KELVIN(act));
+ } else {
+ tz->trips.active[i].temperature = tmp;
+ tz->trips.active[i].flags.valid = 1;
}
- break;
}
name[2] = 'L';
- status =
- acpi_evaluate_reference(tz->device->handle, name, NULL,
- &tz->trips.active[i].devices);
- if (ACPI_SUCCESS(status)) {
- tz->trips.active[i].flags.valid = 1;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Found active threshold [%d]:[%lu]\n",
- i, tz->trips.active[i].temperature));
- } else
- ACPI_EXCEPTION((AE_INFO, status,
- "Invalid active threshold [%d]", i));
+ if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
+ memset(&devices, 0, sizeof(struct acpi_handle_list));
+ status = acpi_evaluate_reference(tz->device->handle,
+ name, NULL, &devices);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_WARNING PREFIX
+ "Invalid active%d threshold\n", i);
+ tz->trips.active[i].flags.valid = 0;
+ }
+ else
+ tz->trips.active[i].flags.valid = 1;
+
+ if (memcmp(&tz->trips.active[i].devices, &devices,
+ sizeof(struct acpi_handle_list))) {
+ memcpy(&tz->trips.active[i].devices, &devices,
+ sizeof(struct acpi_handle_list));
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+ }
+ }
+ if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
+ if (valid != tz->trips.active[i].flags.valid)
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
+
+ if (!tz->trips.active[i].flags.valid)
+ break;
+ }
+
+ if (flag & ACPI_TRIPS_DEVICES) {
+ memset(&devices, 0, sizeof(struct acpi_handle_list));
+ status = acpi_evaluate_reference(tz->device->handle, "_TZD",
+ NULL, &devices);
+ if (memcmp(&tz->devices, &devices,
+ sizeof(struct acpi_handle_list))) {
+ memcpy(&tz->devices, &devices,
+ sizeof(struct acpi_handle_list));
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+ }
}
return 0;
}
-static int acpi_thermal_get_devices(struct acpi_thermal *tz)
+static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
{
- acpi_status status = AE_OK;
+ int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
+ if (ret)
+ return ret;
- if (!tz)
- return -EINVAL;
+ valid = tz->trips.critical.flags.valid |
+ tz->trips.hot.flags.valid |
+ tz->trips.passive.flags.valid;
- status =
- acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices);
- if (ACPI_FAILURE(status))
- return -ENODEV;
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
+ valid |= tz->trips.active[i].flags.valid;
+ if (!valid) {
+ printk(KERN_WARNING FW_BUG "No valid trip found\n");
+ return -ENODEV;
+ }
return 0;
}
-static int acpi_thermal_critical(struct acpi_thermal *tz)
+static void acpi_thermal_check(void *data)
{
- if (!tz || !tz->trips.critical.flags.valid || nocrt)
- return -EINVAL;
+ struct acpi_thermal *tz = data;
- if (tz->temperature >= tz->trips.critical.temperature) {
- printk(KERN_WARNING PREFIX "Critical trip point\n");
- tz->trips.critical.flags.enabled = 1;
- } else if (tz->trips.critical.flags.enabled)
- tz->trips.critical.flags.enabled = 0;
+ thermal_zone_device_update(tz->thermal_zone);
+}
- printk(KERN_EMERG
- "Critical temperature reached (%ld C), shutting down.\n",
- KELVIN_TO_CELSIUS(tz->temperature));
- acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
- tz->trips.critical.flags.enabled);
+/* sys I/F for generic thermal sysfs support */
+#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
- orderly_poweroff(true);
+static int thermal_get_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ int result;
+ if (!tz)
+ return -EINVAL;
+
+ result = acpi_thermal_get_temperature(tz);
+ if (result)
+ return result;
+
+ *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
return 0;
}
-static int acpi_thermal_hot(struct acpi_thermal *tz)
+static const char enabled[] = "kernel";
+static const char disabled[] = "user";
+static int thermal_get_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode *mode)
{
- if (!tz || !tz->trips.hot.flags.valid || nocrt)
+ struct acpi_thermal *tz = thermal->devdata;
+
+ if (!tz)
return -EINVAL;
- if (tz->temperature >= tz->trips.hot.temperature) {
- printk(KERN_WARNING PREFIX "Hot trip point\n");
- tz->trips.hot.flags.enabled = 1;
- } else if (tz->trips.hot.flags.enabled)
- tz->trips.hot.flags.enabled = 0;
+ *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
+ THERMAL_DEVICE_DISABLED;
+
+ return 0;
+}
- acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
- tz->trips.hot.flags.enabled);
+static int thermal_set_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode mode)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ int enable;
+
+ if (!tz)
+ return -EINVAL;
- /* TBD: Call user-mode "sleep(S4)" function */
+ /*
+ * enable/disable thermal management from ACPI thermal driver
+ */
+ if (mode == THERMAL_DEVICE_ENABLED)
+ enable = 1;
+ else if (mode == THERMAL_DEVICE_DISABLED)
+ enable = 0;
+ else
+ return -EINVAL;
+ if (enable != tz->tz_enabled) {
+ tz->tz_enabled = enable;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "%s ACPI thermal control\n",
+ tz->tz_enabled ? enabled : disabled));
+ acpi_thermal_check(tz);
+ }
return 0;
}
-static void acpi_thermal_passive(struct acpi_thermal *tz)
+static int thermal_get_trip_type(struct thermal_zone_device *thermal,
+ int trip, enum thermal_trip_type *type)
{
- int result = 1;
- struct acpi_thermal_passive *passive = NULL;
- int trend = 0;
- int i = 0;
+ struct acpi_thermal *tz = thermal->devdata;
+ int i;
+ if (!tz || trip < 0)
+ return -EINVAL;
- if (!tz || !tz->trips.passive.flags.valid)
- return;
+ if (tz->trips.critical.flags.valid) {
+ if (!trip) {
+ *type = THERMAL_TRIP_CRITICAL;
+ return 0;
+ }
+ trip--;
+ }
- passive = &(tz->trips.passive);
+ if (tz->trips.hot.flags.valid) {
+ if (!trip) {
+ *type = THERMAL_TRIP_HOT;
+ return 0;
+ }
+ trip--;
+ }
- /*
- * Above Trip?
- * -----------
- * Calculate the thermal trend (using the passive cooling equation)
- * and modify the performance limit for all passive cooling devices
- * accordingly. Note that we assume symmetry.
- */
- if (tz->temperature >= passive->temperature) {
- trend =
- (passive->tc1 * (tz->temperature - tz->last_temperature)) +
- (passive->tc2 * (tz->temperature - passive->temperature));
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n",
- trend, passive->tc1, tz->temperature,
- tz->last_temperature, passive->tc2,
- tz->temperature, passive->temperature));
- passive->flags.enabled = 1;
- /* Heating up? */
- if (trend > 0)
- for (i = 0; i < passive->devices.count; i++)
- acpi_processor_set_thermal_limit(passive->
- devices.
- handles[i],
- ACPI_PROCESSOR_LIMIT_INCREMENT);
- /* Cooling off? */
- else if (trend < 0) {
- for (i = 0; i < passive->devices.count; i++)
- /*
- * assume that we are on highest
- * freq/lowest thrott and can leave
- * passive mode, even in error case
- */
- if (!acpi_processor_set_thermal_limit
- (passive->devices.handles[i],
- ACPI_PROCESSOR_LIMIT_DECREMENT))
- result = 0;
- /*
- * Leave cooling mode, even if the temp might
- * higher than trip point This is because some
- * machines might have long thermal polling
- * frequencies (tsp) defined. We will fall back
- * into passive mode in next cycle (probably quicker)
- */
- if (result) {
- passive->flags.enabled = 0;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Disabling passive cooling, still above threshold,"
- " but we are cooling down\n"));
- }
+ if (tz->trips.passive.flags.valid) {
+ if (!trip) {
+ *type = THERMAL_TRIP_PASSIVE;
+ return 0;
}
- return;
+ trip--;
}
- /*
- * Below Trip?
- * -----------
- * Implement passive cooling hysteresis to slowly increase performance
- * and avoid thrashing around the passive trip point. Note that we
- * assume symmetry.
- */
- if (!passive->flags.enabled)
- return;
- for (i = 0; i < passive->devices.count; i++)
- if (!acpi_processor_set_thermal_limit
- (passive->devices.handles[i],
- ACPI_PROCESSOR_LIMIT_DECREMENT))
- result = 0;
- if (result) {
- passive->flags.enabled = 0;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Disabling passive cooling (zone is cool)\n"));
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+ tz->trips.active[i].flags.valid; i++) {
+ if (!trip) {
+ *type = THERMAL_TRIP_ACTIVE;
+ return 0;
+ }
+ trip--;
}
+
+ return -EINVAL;
}
-static void acpi_thermal_active(struct acpi_thermal *tz)
+static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
+ int trip, unsigned long *temp)
{
- int result = 0;
- struct acpi_thermal_active *active = NULL;
- int i = 0;
- int j = 0;
- unsigned long maxtemp = 0;
+ struct acpi_thermal *tz = thermal->devdata;
+ int i;
+ if (!tz || trip < 0)
+ return -EINVAL;
- if (!tz)
- return;
+ if (tz->trips.critical.flags.valid) {
+ if (!trip) {
+ *temp = KELVIN_TO_MILLICELSIUS(
+ tz->trips.critical.temperature,
+ tz->kelvin_offset);
+ return 0;
+ }
+ trip--;
+ }
- for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
- active = &(tz->trips.active[i]);
- if (!active || !active->flags.valid)
- break;
- if (tz->temperature >= active->temperature) {
- /*
- * Above Threshold?
- * ----------------
- * If not already enabled, turn ON all cooling devices
- * associated with this active threshold.
- */
- if (active->temperature > maxtemp)
- tz->state.active_index = i;
- maxtemp = active->temperature;
- if (active->flags.enabled)
- continue;
- for (j = 0; j < active->devices.count; j++) {
- result =
- acpi_bus_set_power(active->devices.
- handles[j],
- ACPI_STATE_D0);
- if (result) {
- printk(KERN_WARNING PREFIX
- "Unable to turn cooling device [%p] 'on'\n",
- active->devices.
- handles[j]);
- continue;
- }
- active->flags.enabled = 1;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Cooling device [%p] now 'on'\n",
- active->devices.handles[j]));
- }
- continue;
+ if (tz->trips.hot.flags.valid) {
+ if (!trip) {
+ *temp = KELVIN_TO_MILLICELSIUS(
+ tz->trips.hot.temperature,
+ tz->kelvin_offset);
+ return 0;
}
- if (!active->flags.enabled)
- continue;
- /*
- * Below Threshold?
- * ----------------
- * Turn OFF all cooling devices associated with this
- * threshold.
- */
- for (j = 0; j < active->devices.count; j++) {
- result = acpi_bus_set_power(active->devices.handles[j],
- ACPI_STATE_D3);
- if (result) {
- printk(KERN_WARNING PREFIX
- "Unable to turn cooling device [%p] 'off'\n",
- active->devices.handles[j]);
- continue;
- }
- active->flags.enabled = 0;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Cooling device [%p] now 'off'\n",
- active->devices.handles[j]));
+ trip--;
+ }
+
+ if (tz->trips.passive.flags.valid) {
+ if (!trip) {
+ *temp = KELVIN_TO_MILLICELSIUS(
+ tz->trips.passive.temperature,
+ tz->kelvin_offset);
+ return 0;
+ }
+ trip--;
+ }
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+ tz->trips.active[i].flags.valid; i++) {
+ if (!trip) {
+ *temp = KELVIN_TO_MILLICELSIUS(
+ tz->trips.active[i].temperature,
+ tz->kelvin_offset);
+ return 0;
}
+ trip--;
}
+
+ return -EINVAL;
}
-static void acpi_thermal_check(void *context);
+static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
+ unsigned long *temperature) {
+ struct acpi_thermal *tz = thermal->devdata;
-static void acpi_thermal_run(unsigned long data)
+ if (tz->trips.critical.flags.valid) {
+ *temperature = KELVIN_TO_MILLICELSIUS(
+ tz->trips.critical.temperature,
+ tz->kelvin_offset);
+ return 0;
+ } else
+ return -EINVAL;
+}
+
+static int thermal_notify(struct thermal_zone_device *thermal, int trip,
+ enum thermal_trip_type trip_type)
{
- struct acpi_thermal *tz = (struct acpi_thermal *)data;
- if (!tz->zombie)
- acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data);
+ u8 type = 0;
+ struct acpi_thermal *tz = thermal->devdata;
+
+ if (trip_type == THERMAL_TRIP_CRITICAL)
+ type = ACPI_THERMAL_NOTIFY_CRITICAL;
+ else if (trip_type == THERMAL_TRIP_HOT)
+ type = ACPI_THERMAL_NOTIFY_HOT;
+ else
+ return 0;
+
+ acpi_bus_generate_proc_event(tz->device, type, 1);
+ acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+ dev_name(&tz->device->dev), type, 1);
+
+ if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
+ return 1;
+
+ return 0;
}
-static void acpi_thermal_check(void *data)
+typedef int (*cb)(struct thermal_zone_device *, int,
+ struct thermal_cooling_device *);
+static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev,
+ cb action)
{
+ struct acpi_device *device = cdev->devdata;
+ struct acpi_thermal *tz = thermal->devdata;
+ struct acpi_device *dev;
+ acpi_status status;
+ acpi_handle handle;
+ int i;
+ int j;
+ int trip = -1;
int result = 0;
- struct acpi_thermal *tz = data;
- unsigned long sleep_time = 0;
- int i = 0;
- struct acpi_thermal_state state;
+ if (tz->trips.critical.flags.valid)
+ trip++;
- if (!tz) {
- printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
- return;
+ if (tz->trips.hot.flags.valid)
+ trip++;
+
+ if (tz->trips.passive.flags.valid) {
+ trip++;
+ for (i = 0; i < tz->trips.passive.devices.count;
+ i++) {
+ handle = tz->trips.passive.devices.handles[i];
+ status = acpi_bus_get_device(handle, &dev);
+ if (ACPI_SUCCESS(status) && (dev == device)) {
+ result = action(thermal, trip, cdev);
+ if (result)
+ goto failed;
+ }
+ }
}
- state = tz->state;
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+ if (!tz->trips.active[i].flags.valid)
+ break;
+ trip++;
+ for (j = 0;
+ j < tz->trips.active[i].devices.count;
+ j++) {
+ handle = tz->trips.active[i].devices.handles[j];
+ status = acpi_bus_get_device(handle, &dev);
+ if (ACPI_SUCCESS(status) && (dev == device)) {
+ result = action(thermal, trip, cdev);
+ if (result)
+ goto failed;
+ }
+ }
+ }
- result = acpi_thermal_get_temperature(tz);
- if (result)
- return;
+ for (i = 0; i < tz->devices.count; i++) {
+ handle = tz->devices.handles[i];
+ status = acpi_bus_get_device(handle, &dev);
+ if (ACPI_SUCCESS(status) && (dev == device)) {
+ result = action(thermal, -1, cdev);
+ if (result)
+ goto failed;
+ }
+ }
- memset(&tz->state, 0, sizeof(tz->state));
+failed:
+ return result;
+}
+
+static int
+acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ return acpi_thermal_cooling_device_cb(thermal, cdev,
+ thermal_zone_bind_cooling_device);
+}
+
+static int
+acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ return acpi_thermal_cooling_device_cb(thermal, cdev,
+ thermal_zone_unbind_cooling_device);
+}
+
+static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+ .bind = acpi_thermal_bind_cooling_device,
+ .unbind = acpi_thermal_unbind_cooling_device,
+ .get_temp = thermal_get_temp,
+ .get_mode = thermal_get_mode,
+ .set_mode = thermal_set_mode,
+ .get_trip_type = thermal_get_trip_type,
+ .get_trip_temp = thermal_get_trip_temp,
+ .get_crit_temp = thermal_get_crit_temp,
+ .notify = thermal_notify,
+};
+
+static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
+{
+ int trips = 0;
+ int result;
+ acpi_status status;
+ int i;
- /*
- * Check Trip Points
- * -----------------
- * Compare the current temperature to the trip point values to see
- * if we've entered one of the thermal policy states. Note that
- * this function determines when a state is entered, but the
- * individual policy decides when it is exited (e.g. hysteresis).
- */
if (tz->trips.critical.flags.valid)
- state.critical |=
- (tz->temperature >= tz->trips.critical.temperature);
+ trips++;
+
if (tz->trips.hot.flags.valid)
- state.hot |= (tz->temperature >= tz->trips.hot.temperature);
+ trips++;
+
if (tz->trips.passive.flags.valid)
- state.passive |=
- (tz->temperature >= tz->trips.passive.temperature);
- for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
- if (tz->trips.active[i].flags.valid)
- state.active |=
- (tz->temperature >=
- tz->trips.active[i].temperature);
+ trips++;
- /*
- * Invoke Policy
- * -------------
- * Separated from the above check to allow individual policy to
- * determine when to exit a given state.
- */
- if (state.critical)
- acpi_thermal_critical(tz);
- if (state.hot)
- acpi_thermal_hot(tz);
- if (state.passive)
- acpi_thermal_passive(tz);
- if (state.active)
- acpi_thermal_active(tz);
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+ tz->trips.active[i].flags.valid; i++, trips++);
- /*
- * Calculate State
- * ---------------
- * Again, separated from the above two to allow independent policy
- * decisions.
- */
- tz->state.critical = tz->trips.critical.flags.enabled;
- tz->state.hot = tz->trips.hot.flags.enabled;
- tz->state.passive = tz->trips.passive.flags.enabled;
- tz->state.active = 0;
- for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
- tz->state.active |= tz->trips.active[i].flags.enabled;
+ if (tz->trips.passive.flags.valid)
+ tz->thermal_zone =
+ thermal_zone_device_register("acpitz", trips, tz,
+ &acpi_thermal_zone_ops,
+ tz->trips.passive.tc1,
+ tz->trips.passive.tc2,
+ tz->trips.passive.tsp*100,
+ tz->polling_frequency*100);
+ else
+ tz->thermal_zone =
+ thermal_zone_device_register("acpitz", trips, tz,
+ &acpi_thermal_zone_ops,
+ 0, 0, 0,
+ tz->polling_frequency*100);
+ if (IS_ERR(tz->thermal_zone))
+ return -ENODEV;
- /*
- * Calculate Sleep Time
- * --------------------
- * If we're in the passive state, use _TSP's value. Otherwise
- * use the default polling frequency (e.g. _TZP). If no polling
- * frequency is specified then we'll wait forever (at least until
- * a thermal event occurs). Note that _TSP and _TZD values are
- * given in 1/10th seconds (we must covert to milliseconds).
- */
- if (tz->state.passive)
- sleep_time = tz->trips.passive.tsp * 100;
- else if (tz->polling_frequency > 0)
- sleep_time = tz->polling_frequency * 100;
+ result = sysfs_create_link(&tz->device->dev.kobj,
+ &tz->thermal_zone->device.kobj, "thermal_zone");
+ if (result)
+ return result;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n",
- tz->name, tz->temperature, sleep_time));
+ result = sysfs_create_link(&tz->thermal_zone->device.kobj,
+ &tz->device->dev.kobj, "device");
+ if (result)
+ return result;
- /*
- * Schedule Next Poll
- * ------------------
- */
- if (!sleep_time) {
- if (timer_pending(&(tz->timer)))
- del_timer(&(tz->timer));
- } else {
- if (timer_pending(&(tz->timer)))
- mod_timer(&(tz->timer),
- jiffies + (HZ * sleep_time) / 1000);
- else {
- tz->timer.data = (unsigned long)tz;
- tz->timer.function = acpi_thermal_run;
- tz->timer.expires = jiffies + (HZ * sleep_time) / 1000;
- add_timer(&(tz->timer));
- }
+ status = acpi_attach_data(tz->device->handle,
+ acpi_bus_private_data_handler,
+ tz->thermal_zone);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX
+ "Error attaching device data\n");
+ return -ENODEV;
}
- return;
+ tz->tz_enabled = 1;
+
+ dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
+ tz->thermal_zone->id);
+ return 0;
}
+static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
+{
+ sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
+ sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
+ thermal_zone_device_unregister(tz->thermal_zone);
+ tz->thermal_zone = NULL;
+ acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
+}
+
+
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
acpi_device_bid(device));
}
seq_puts(seq, "\n");
+ } else {
+ seq_printf(seq, "passive (forced):");
+ if (tz->thermal_zone->forced_passive)
+ seq_printf(seq, " %i C\n",
+ tz->thermal_zone->forced_passive / 1000);
+ else
+ seq_printf(seq, "<not set>\n");
}
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
if (!tz)
goto end;
- if (!tz->polling_frequency) {
+ if (!tz->thermal_zone->polling_delay) {
seq_puts(seq, "<polling disabled>\n");
goto end;
}
- seq_printf(seq, "polling frequency: %lu seconds\n",
- (tz->polling_frequency / 10));
+ seq_printf(seq, "polling frequency: %d seconds\n",
+ (tz->thermal_zone->polling_delay / 1000));
end:
return 0;
acpi_thermal_dir);
if (!acpi_device_dir(device))
return -ENODEV;
- acpi_device_dir(device)->owner = THIS_MODULE;
}
/* 'state' [R] */
- entry = create_proc_entry(ACPI_THERMAL_FILE_STATE,
- S_IRUGO, acpi_device_dir(device));
+ entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
+ S_IRUGO, acpi_device_dir(device),
+ &acpi_thermal_state_fops,
+ acpi_driver_data(device));
if (!entry)
return -ENODEV;
- else {
- entry->proc_fops = &acpi_thermal_state_fops;
- entry->data = acpi_driver_data(device);
- entry->owner = THIS_MODULE;
- }
/* 'temperature' [R] */
- entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
- S_IRUGO, acpi_device_dir(device));
+ entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
+ S_IRUGO, acpi_device_dir(device),
+ &acpi_thermal_temp_fops,
+ acpi_driver_data(device));
if (!entry)
return -ENODEV;
- else {
- entry->proc_fops = &acpi_thermal_temp_fops;
- entry->data = acpi_driver_data(device);
- entry->owner = THIS_MODULE;
- }
- /* 'trip_points' [R/W] */
- entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
- S_IFREG | S_IRUGO | S_IWUSR,
- acpi_device_dir(device));
+ /* 'trip_points' [R] */
+ entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
+ S_IRUGO,
+ acpi_device_dir(device),
+ &acpi_thermal_trip_fops,
+ acpi_driver_data(device));
if (!entry)
return -ENODEV;
- else {
- entry->proc_fops = &acpi_thermal_trip_fops;
- entry->data = acpi_driver_data(device);
- entry->owner = THIS_MODULE;
- }
/* 'cooling_mode' [R/W] */
- entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
- S_IFREG | S_IRUGO | S_IWUSR,
- acpi_device_dir(device));
+ entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
+ S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_device_dir(device),
+ &acpi_thermal_cooling_fops,
+ acpi_driver_data(device));
if (!entry)
return -ENODEV;
- else {
- entry->proc_fops = &acpi_thermal_cooling_fops;
- entry->data = acpi_driver_data(device);
- entry->owner = THIS_MODULE;
- }
/* 'polling_frequency' [R/W] */
- entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
- S_IFREG | S_IRUGO | S_IWUSR,
- acpi_device_dir(device));
+ entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
+ S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_device_dir(device),
+ &acpi_thermal_polling_fops,
+ acpi_driver_data(device));
if (!entry)
return -ENODEV;
- else {
- entry->proc_fops = &acpi_thermal_polling_fops;
- entry->data = acpi_driver_data(device);
- entry->owner = THIS_MODULE;
- }
-
return 0;
}
Driver Interface
-------------------------------------------------------------------------- */
-static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
+static void acpi_thermal_notify(struct acpi_device *device, u32 event)
{
- struct acpi_thermal *tz = data;
- struct acpi_device *device = NULL;
+ struct acpi_thermal *tz = acpi_driver_data(device);
if (!tz)
return;
- device = tz->device;
-
switch (event) {
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
acpi_thermal_check(tz);
break;
case ACPI_THERMAL_NOTIFY_THRESHOLDS:
- acpi_thermal_get_trip_points(tz);
+ acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
acpi_thermal_check(tz);
- acpi_bus_generate_event(device, event, 0);
+ acpi_bus_generate_proc_event(device, event, 0);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event, 0);
break;
case ACPI_THERMAL_NOTIFY_DEVICES:
- if (tz->flags.devices)
- acpi_thermal_get_devices(tz);
- acpi_bus_generate_event(device, event, 0);
+ acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
+ acpi_thermal_check(tz);
+ acpi_bus_generate_proc_event(device, event, 0);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event, 0);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
-
- return;
}
static int acpi_thermal_get_info(struct acpi_thermal *tz)
else
acpi_thermal_get_polling_frequency(tz);
- /* Get devices in this thermal zone [_TZD] (optional) */
- result = acpi_thermal_get_devices(tz);
- if (!result)
- tz->flags.devices = 1;
-
return 0;
}
+/*
+ * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
+ * handles temperature values with a single decimal place. As a consequence,
+ * some implementations use an offset of 273.1 and others use an offset of
+ * 273.2. Try to find out which one is being used, to present the most
+ * accurate and visually appealing number.
+ *
+ * The heuristic below should work for all ACPI thermal zones which have a
+ * critical trip point with a value being a multiple of 0.5 degree Celsius.
+ */
+static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
+{
+ if (tz->trips.critical.flags.valid &&
+ (tz->trips.critical.temperature % 5) == 1)
+ tz->kelvin_offset = 2731;
+ else
+ tz->kelvin_offset = 2732;
+}
+
static int acpi_thermal_add(struct acpi_device *device)
{
int result = 0;
- acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
strcpy(tz->name, device->pnp.bus_id);
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
- acpi_driver_data(device) = tz;
+ device->driver_data = tz;
+ mutex_init(&tz->lock);
- result = acpi_thermal_get_info(tz);
- if (result)
- goto end;
- result = acpi_thermal_add_fs(device);
+ result = acpi_thermal_get_info(tz);
if (result)
- goto end;
+ goto free_memory;
- init_timer(&tz->timer);
+ acpi_thermal_guess_offset(tz);
- acpi_thermal_check(tz);
+ result = acpi_thermal_register_thermal_zone(tz);
+ if (result)
+ goto free_memory;
- status = acpi_install_notify_handler(device->handle,
- ACPI_DEVICE_NOTIFY,
- acpi_thermal_notify, tz);
- if (ACPI_FAILURE(status)) {
- result = -ENODEV;
- goto end;
- }
+ result = acpi_thermal_add_fs(device);
+ if (result)
+ goto unregister_thermal_zone;
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
acpi_device_name(device), acpi_device_bid(device),
KELVIN_TO_CELSIUS(tz->temperature));
+ goto end;
- end:
- if (result) {
- acpi_thermal_remove_fs(device);
- kfree(tz);
- }
-
+unregister_thermal_zone:
+ thermal_zone_device_unregister(tz->thermal_zone);
+free_memory:
+ kfree(tz);
+end:
return result;
}
static int acpi_thermal_remove(struct acpi_device *device, int type)
{
- acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
-
if (!device || !acpi_driver_data(device))
return -EINVAL;
tz = acpi_driver_data(device);
- /* avoid timer adding new defer task */
- tz->zombie = 1;
- /* wait for running timer (on other CPUs) finish */
- del_timer_sync(&(tz->timer));
- /* synchronize deferred task */
- acpi_os_wait_events_complete(NULL);
- /* deferred task may reinsert timer */
- del_timer_sync(&(tz->timer));
-
- status = acpi_remove_notify_handler(device->handle,
- ACPI_DEVICE_NOTIFY,
- acpi_thermal_notify);
-
- /* Terminate policy */
- if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) {
- tz->trips.passive.flags.enabled = 0;
- acpi_thermal_passive(tz);
- }
- if (tz->trips.active[0].flags.valid
- && tz->trips.active[0].flags.enabled) {
- tz->trips.active[0].flags.enabled = 0;
- acpi_thermal_active(tz);
- }
-
acpi_thermal_remove_fs(device);
-
+ acpi_thermal_unregister_thermal_zone(tz);
+ mutex_destroy(&tz->lock);
kfree(tz);
return 0;
}
return AE_OK;
}
+static int thermal_act(const struct dmi_system_id *d) {
+
+ if (act == 0) {
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "disabling all active thermal trip points\n", d->ident);
+ act = -1;
+ }
+ return 0;
+}
+static int thermal_nocrt(const struct dmi_system_id *d) {
+
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "disabling all critical thermal trip point actions.\n", d->ident);
+ nocrt = 1;
+ return 0;
+}
+static int thermal_tzp(const struct dmi_system_id *d) {
+
+ if (tzp == 0) {
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "enabling thermal zone polling\n", d->ident);
+ tzp = 300; /* 300 dS = 30 Seconds */
+ }
+ return 0;
+}
+static int thermal_psv(const struct dmi_system_id *d) {
+
+ if (psv == 0) {
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "disabling all passive thermal trip points\n", d->ident);
+ psv = -1;
+ }
+ return 0;
+}
+
+static struct dmi_system_id thermal_dmi_table[] __initdata = {
+ /*
+ * Award BIOS on this AOpen makes thermal control almost worthless.
+ * http://bugzilla.kernel.org/show_bug.cgi?id=8842
+ */
+ {
+ .callback = thermal_act,
+ .ident = "AOpen i915GMm-HFS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+ DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+ },
+ },
+ {
+ .callback = thermal_psv,
+ .ident = "AOpen i915GMm-HFS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+ DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+ },
+ },
+ {
+ .callback = thermal_tzp,
+ .ident = "AOpen i915GMm-HFS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+ DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+ },
+ },
+ {
+ .callback = thermal_nocrt,
+ .ident = "Gigabyte GA-7ZX",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
+ DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
+ },
+ },
+ {}
+};
+
static int __init acpi_thermal_init(void)
{
int result = 0;
+ dmi_check_system(thermal_dmi_table);
+
if (off) {
printk(KERN_NOTICE "ACPI: thermal control disabled\n");
return -ENODEV;
acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
if (!acpi_thermal_dir)
return -ENODEV;
- acpi_thermal_dir->owner = THIS_MODULE;
result = acpi_bus_register_driver(&acpi_thermal_driver);
if (result < 0) {
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff