Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
new file mode 100644
index 0000000..79c3a68
--- /dev/null
+++ b/drivers/acpi/thermal.c
@@ -0,0 +1,1445 @@
+/*
+ * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This driver fully implements the ACPI thermal policy as described in the
+ * ACPI 2.0 Specification.
+ *
+ * TBD: 1. Implement passive cooling hysteresis.
+ * 2. Enhance passive cooling (CPU) states/limit interface to support
+ * concepts of 'multiple limiters', upper/lower limits, etc.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/kmod.h>
+#include <linux/seq_file.h>
+#include <asm/uaccess.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+#define ACPI_THERMAL_COMPONENT 0x04000000
+#define ACPI_THERMAL_CLASS "thermal_zone"
+#define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver"
+#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
+#define ACPI_THERMAL_FILE_STATE "state"
+#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
+#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
+#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
+#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
+#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
+#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
+#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
+#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
+#define ACPI_THERMAL_NOTIFY_HOT 0xF1
+#define ACPI_THERMAL_MODE_ACTIVE 0x00
+#define ACPI_THERMAL_MODE_PASSIVE 0x01
+#define ACPI_THERMAL_MODE_CRITICAL 0xff
+#define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff"
+
+#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 ("acpi_thermal")
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME);
+MODULE_LICENSE("GPL");
+
+static int tzp;
+module_param(tzp, int, 0);
+MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
+
+
+static int acpi_thermal_add (struct acpi_device *device);
+static int acpi_thermal_remove (struct acpi_device *device, int type);
+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);
+static ssize_t acpi_thermal_write_trip_points (struct file*,const char __user *,size_t,loff_t *);
+static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
+static ssize_t acpi_thermal_write_cooling_mode (struct file*,const char __user *,size_t,loff_t *);
+static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
+static ssize_t acpi_thermal_write_polling(struct file*,const char __user *,size_t,loff_t *);
+
+static struct acpi_driver acpi_thermal_driver = {
+ .name = ACPI_THERMAL_DRIVER_NAME,
+ .class = ACPI_THERMAL_CLASS,
+ .ids = ACPI_THERMAL_HID,
+ .ops = {
+ .add = acpi_thermal_add,
+ .remove = acpi_thermal_remove,
+ },
+};
+
+struct acpi_thermal_state {
+ u8 critical:1;
+ u8 hot:1;
+ u8 passive:1;
+ u8 active:1;
+ u8 reserved:4;
+ int active_index;
+};
+
+struct acpi_thermal_state_flags {
+ u8 valid:1;
+ u8 enabled:1;
+ u8 reserved:6;
+};
+
+struct acpi_thermal_critical {
+ struct acpi_thermal_state_flags flags;
+ unsigned long temperature;
+};
+
+struct acpi_thermal_hot {
+ struct acpi_thermal_state_flags flags;
+ unsigned long temperature;
+};
+
+struct acpi_thermal_passive {
+ struct acpi_thermal_state_flags flags;
+ unsigned long temperature;
+ unsigned long tc1;
+ unsigned long tc2;
+ unsigned long tsp;
+ struct acpi_handle_list devices;
+};
+
+struct acpi_thermal_active {
+ struct acpi_thermal_state_flags flags;
+ unsigned long temperature;
+ struct acpi_handle_list devices;
+};
+
+struct acpi_thermal_trips {
+ struct acpi_thermal_critical critical;
+ struct acpi_thermal_hot hot;
+ struct acpi_thermal_passive passive;
+ struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
+};
+
+struct acpi_thermal_flags {
+ u8 cooling_mode:1; /* _SCP */
+ u8 devices:1; /* _TZD */
+ u8 reserved:6;
+};
+
+struct acpi_thermal {
+ acpi_handle handle;
+ acpi_bus_id name;
+ unsigned long temperature;
+ unsigned long last_temperature;
+ unsigned long polling_frequency;
+ u8 cooling_mode;
+ volatile u8 zombie;
+ struct acpi_thermal_flags flags;
+ struct acpi_thermal_state state;
+ struct acpi_thermal_trips trips;
+ struct acpi_handle_list devices;
+ struct timer_list timer;
+};
+
+static struct file_operations acpi_thermal_state_fops = {
+ .open = acpi_thermal_state_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct file_operations acpi_thermal_temp_fops = {
+ .open = acpi_thermal_temp_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct file_operations acpi_thermal_trip_fops = {
+ .open = acpi_thermal_trip_open_fs,
+ .read = seq_read,
+ .write = acpi_thermal_write_trip_points,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct file_operations acpi_thermal_cooling_fops = {
+ .open = acpi_thermal_cooling_open_fs,
+ .read = seq_read,
+ .write = acpi_thermal_write_cooling_mode,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct file_operations acpi_thermal_polling_fops = {
+ .open = acpi_thermal_polling_open_fs,
+ .read = seq_read,
+ .write = acpi_thermal_write_polling,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* --------------------------------------------------------------------------
+ Thermal Zone Management
+ -------------------------------------------------------------------------- */
+
+static int
+acpi_thermal_get_temperature (
+ struct acpi_thermal *tz)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ tz->last_temperature = tz->temperature;
+
+ status = acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", tz->temperature));
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_get_polling_frequency (
+ struct acpi_thermal *tz)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_get_polling_frequency");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ status = acpi_evaluate_integer(tz->handle, "_TZP", NULL, &tz->polling_frequency);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", tz->polling_frequency));
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_set_polling (
+ struct acpi_thermal *tz,
+ int seconds)
+{
+ ACPI_FUNCTION_TRACE("acpi_thermal_set_polling");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency set to %lu seconds\n", tz->polling_frequency));
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_set_cooling_mode (
+ struct acpi_thermal *tz,
+ int mode)
+{
+ acpi_status status = AE_OK;
+ union acpi_object arg0 = {ACPI_TYPE_INTEGER};
+ struct acpi_object_list arg_list = {1, &arg0};
+ acpi_handle handle = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_set_cooling_mode");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ status = acpi_get_handle(tz->handle, "_SCP", &handle);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
+ return_VALUE(-ENODEV);
+ }
+
+ arg0.integer.value = mode;
+
+ status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ tz->cooling_mode = mode;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n",
+ mode?"passive":"active"));
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_get_trip_points (
+ struct acpi_thermal *tz)
+{
+ acpi_status status = AE_OK;
+ int i = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ /* Critical Shutdown (required) */
+
+ status = acpi_evaluate_integer(tz->handle, "_CRT", NULL,
+ &tz->trips.critical.temperature);
+ if (ACPI_FAILURE(status)) {
+ tz->trips.critical.flags.valid = 0;
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "No critical threshold\n"));
+ return_VALUE(-ENODEV);
+ }
+ else {
+ tz->trips.critical.flags.valid = 1;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found critical threshold [%lu]\n", tz->trips.critical.temperature));
+ }
+
+ /* Critical Sleep (optional) */
+
+ status = acpi_evaluate_integer(tz->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) */
+
+ status = acpi_evaluate_integer(tz->handle, "_PSV", NULL, &tz->trips.passive.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->handle, "_TC1", NULL, &tz->trips.passive.tc1);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+
+ status = acpi_evaluate_integer(tz->handle, "_TC2", NULL, &tz->trips.passive.tc2);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+
+ status = acpi_evaluate_integer(tz->handle, "_TSP", NULL, &tz->trips.passive.tsp);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+
+ status = acpi_evaluate_reference(tz->handle, "_PSL", NULL, &tz->trips.passive.devices);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+
+ if (!tz->trips.passive.flags.valid)
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid passive threshold\n"));
+ else
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found passive threshold [%lu]\n", tz->trips.passive.temperature));
+ }
+
+ /* Active: Fans, etc. (optional) */
+
+ for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) {
+
+ char name[5] = {'_','A','C',('0'+i),'\0'};
+
+ status = acpi_evaluate_integer(tz->handle, name, NULL, &tz->trips.active[i].temperature);
+ if (ACPI_FAILURE(status))
+ break;
+
+ name[2] = 'L';
+ status = acpi_evaluate_reference(tz->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_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid active threshold [%d]\n", i));
+ }
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_get_devices (
+ struct acpi_thermal *tz)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_get_devices");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ status = acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_call_usermode (
+ char *path)
+{
+ char *argv[2] = {NULL, NULL};
+ char *envp[3] = {NULL, NULL, NULL};
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode");
+
+ if (!path)
+ return_VALUE(-EINVAL);
+
+ argv[0] = path;
+
+ /* minimal command environment */
+ envp[0] = "HOME=/";
+ envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+
+ call_usermodehelper(argv[0], argv, envp, 0);
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_critical (
+ struct acpi_thermal *tz)
+{
+ int result = 0;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_critical");
+
+ if (!tz || !tz->trips.critical.flags.valid)
+ return_VALUE(-EINVAL);
+
+ if (tz->temperature >= tz->trips.critical.temperature) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n"));
+ tz->trips.critical.flags.enabled = 1;
+ }
+ else if (tz->trips.critical.flags.enabled)
+ tz->trips.critical.flags.enabled = 0;
+
+ result = acpi_bus_get_device(tz->handle, &device);
+ if (result)
+ return_VALUE(result);
+
+ printk(KERN_EMERG "Critical temperature reached (%ld C), shutting down.\n", KELVIN_TO_CELSIUS(tz->temperature));
+ acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, tz->trips.critical.flags.enabled);
+
+ acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF);
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_hot (
+ struct acpi_thermal *tz)
+{
+ int result = 0;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_hot");
+
+ if (!tz || !tz->trips.hot.flags.valid)
+ return_VALUE(-EINVAL);
+
+ if (tz->temperature >= tz->trips.hot.temperature) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Hot trip point\n"));
+ tz->trips.hot.flags.enabled = 1;
+ }
+ else if (tz->trips.hot.flags.enabled)
+ tz->trips.hot.flags.enabled = 0;
+
+ result = acpi_bus_get_device(tz->handle, &device);
+ if (result)
+ return_VALUE(result);
+
+ acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, tz->trips.hot.flags.enabled);
+
+ /* TBD: Call user-mode "sleep(S4)" function */
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_passive (
+ struct acpi_thermal *tz)
+{
+ int result = 0;
+ struct acpi_thermal_passive *passive = NULL;
+ int trend = 0;
+ int i = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_passive");
+
+ if (!tz || !tz->trips.passive.flags.valid)
+ return_VALUE(-EINVAL);
+
+ passive = &(tz->trips.passive);
+
+ /*
+ * 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));
+ tz->trips.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++)
+ acpi_processor_set_thermal_limit(
+ passive->devices.handles[i],
+ ACPI_PROCESSOR_LIMIT_DECREMENT);
+ }
+
+ /*
+ * Below Trip?
+ * -----------
+ * Implement passive cooling hysteresis to slowly increase performance
+ * and avoid thrashing around the passive trip point. Note that we
+ * assume symmetry.
+ */
+ else if (tz->trips.passive.flags.enabled) {
+ for (i=0; i<passive->devices.count; i++)
+ result = acpi_processor_set_thermal_limit(
+ passive->devices.handles[i],
+ ACPI_PROCESSOR_LIMIT_DECREMENT);
+ if (result == 1) {
+ tz->trips.passive.flags.enabled = 0;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Disabling passive cooling (zone is cool)\n"));
+ }
+ }
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_active (
+ struct acpi_thermal *tz)
+{
+ int result = 0;
+ struct acpi_thermal_active *active = NULL;
+ int i = 0;
+ int j = 0;
+ unsigned long maxtemp = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_active");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) {
+
+ active = &(tz->trips.active[i]);
+ if (!active || !active->flags.valid)
+ break;
+
+ /*
+ * Above Threshold?
+ * ----------------
+ * If not already enabled, turn ON all cooling devices
+ * associated with this active threshold.
+ */
+ if (tz->temperature >= active->temperature) {
+ if (active->temperature > maxtemp)
+ tz->state.active_index = i, maxtemp = active->temperature;
+ if (!active->flags.enabled) {
+ for (j = 0; j < active->devices.count; j++) {
+ result = acpi_bus_set_power(active->devices.handles[j], ACPI_STATE_D0);
+ if (result) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "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]));
+ }
+ }
+ }
+ /*
+ * Below Threshold?
+ * ----------------
+ * Turn OFF all cooling devices associated with this
+ * threshold.
+ */
+ else if (active->flags.enabled) {
+ for (j = 0; j < active->devices.count; j++) {
+ result = acpi_bus_set_power(active->devices.handles[j], ACPI_STATE_D3);
+ if (result) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "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]));
+ }
+ }
+ }
+
+ return_VALUE(0);
+}
+
+
+static void acpi_thermal_check (void *context);
+
+static void
+acpi_thermal_run (
+ unsigned long data)
+{
+ struct acpi_thermal *tz = (struct acpi_thermal *)data;
+ if (!tz->zombie)
+ acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
+ acpi_thermal_check, (void *) data);
+}
+
+
+static void
+acpi_thermal_check (
+ void *data)
+{
+ int result = 0;
+ struct acpi_thermal *tz = (struct acpi_thermal *) data;
+ unsigned long sleep_time = 0;
+ int i = 0;
+ struct acpi_thermal_state state;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_check");
+
+ if (!tz) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n"));
+ return_VOID;
+ }
+
+ state = tz->state;
+
+ result = acpi_thermal_get_temperature(tz);
+ if (result)
+ return_VOID;
+
+ memset(&tz->state, 0, sizeof(tz->state));
+
+ /*
+ * 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);
+ if (tz->trips.hot.flags.valid)
+ state.hot |= (tz->temperature >= tz->trips.hot.temperature);
+ 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);
+
+ /*
+ * 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);
+
+ /*
+ * Calculate State
+ * ---------------
+ * Again, separated from the above two to allow independent policy
+ * decisions.
+ */
+ if (tz->trips.critical.flags.enabled)
+ tz->state.critical = 1;
+ if (tz->trips.hot.flags.enabled)
+ tz->state.hot = 1;
+ if (tz->trips.passive.flags.enabled)
+ tz->state.passive = 1;
+ for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++)
+ if (tz->trips.active[i].flags.enabled)
+ tz->state.active = 1;
+
+ /*
+ * 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;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n",
+ tz->name, tz->temperature, sleep_time));
+
+ /*
+ * 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), (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));
+ }
+ }
+
+ return_VOID;
+}
+
+
+/* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+static struct proc_dir_entry *acpi_thermal_dir;
+
+static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show");
+
+ if (!tz)
+ goto end;
+
+ seq_puts(seq, "state: ");
+
+ if (!tz->state.critical && !tz->state.hot && !tz->state.passive && !tz->state.active)
+ seq_puts(seq, "ok\n");
+ else {
+ if (tz->state.critical)
+ seq_puts(seq, "critical ");
+ if (tz->state.hot)
+ seq_puts(seq, "hot ");
+ if (tz->state.passive)
+ seq_puts(seq, "passive ");
+ if (tz->state.active)
+ seq_printf(seq, "active[%d]", tz->state.active_index);
+ seq_puts(seq, "\n");
+ }
+
+end:
+ return_VALUE(0);
+}
+
+static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
+}
+
+
+static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
+{
+ int result = 0;
+ struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show");
+
+ if (!tz)
+ goto end;
+
+ result = acpi_thermal_get_temperature(tz);
+ if (result)
+ goto end;
+
+ seq_printf(seq, "temperature: %ld C\n",
+ KELVIN_TO_CELSIUS(tz->temperature));
+
+end:
+ return_VALUE(0);
+}
+
+static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
+}
+
+
+static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+ int i = 0;
+ int j = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_trip_seq_show");
+
+ if (!tz)
+ goto end;
+
+ if (tz->trips.critical.flags.valid)
+ seq_printf(seq, "critical (S5): %ld C\n",
+ KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
+
+ if (tz->trips.hot.flags.valid)
+ seq_printf(seq, "hot (S4): %ld C\n",
+ KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
+
+ if (tz->trips.passive.flags.valid) {
+ seq_printf(seq, "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
+ KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
+ tz->trips.passive.tc1,
+ tz->trips.passive.tc2,
+ tz->trips.passive.tsp);
+ for (j=0; j<tz->trips.passive.devices.count; j++) {
+
+ seq_printf(seq, "0x%p ", tz->trips.passive.devices.handles[j]);
+ }
+ seq_puts(seq, "\n");
+ }
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+ if (!(tz->trips.active[i].flags.valid))
+ break;
+ seq_printf(seq, "active[%d]: %ld C: devices=",
+ i, KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
+ for (j = 0; j < tz->trips.active[i].devices.count; j++)
+ seq_printf(seq, "0x%p ",
+ tz->trips.active[i].devices.handles[j]);
+ seq_puts(seq, "\n");
+ }
+
+end:
+ return_VALUE(0);
+}
+
+static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
+}
+
+static ssize_t
+acpi_thermal_write_trip_points (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+{
+ struct seq_file *m = (struct seq_file *)file->private_data;
+ struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
+
+ char *limit_string;
+ int num, critical, hot, passive;
+ int *active;
+ int i = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_write_trip_points");
+
+ limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
+ if(!limit_string)
+ return_VALUE(-ENOMEM);
+
+ memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN);
+
+ active = kmalloc(ACPI_THERMAL_MAX_ACTIVE *sizeof(int), GFP_KERNEL);
+ if(!active)
+ return_VALUE(-ENOMEM);
+
+ if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n"));
+ count = -EINVAL;
+ goto end;
+ }
+
+ if (copy_from_user(limit_string, buffer, count)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n"));
+ count = -EFAULT;
+ goto end;
+ }
+
+ limit_string[count] = '\0';
+
+ num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d",
+ &critical, &hot, &passive,
+ &active[0], &active[1], &active[2], &active[3], &active[4],
+ &active[5], &active[6], &active[7], &active[8], &active[9]);
+ if(!(num >=5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n"));
+ count = -EINVAL;
+ goto end;
+ }
+
+ tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical);
+ tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot);
+ tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive);
+ for (i = 0; i < num - 3; i++) {
+ if (!(tz->trips.active[i].flags.valid))
+ break;
+ tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]);
+ }
+
+end:
+ kfree(active);
+ kfree(limit_string);
+ return_VALUE(count);
+}
+
+
+static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show");
+
+ if (!tz)
+ goto end;
+
+ if (!tz->flags.cooling_mode) {
+ seq_puts(seq, "<setting not supported>\n");
+ }
+
+ if ( tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL )
+ seq_printf(seq, "cooling mode: critical\n");
+ else
+ seq_printf(seq, "cooling mode: %s\n",
+ tz->cooling_mode?"passive":"active");
+
+end:
+ return_VALUE(0);
+}
+
+static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_thermal_cooling_seq_show,
+ PDE(inode)->data);
+}
+
+static ssize_t
+acpi_thermal_write_cooling_mode (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+{
+ struct seq_file *m = (struct seq_file *)file->private_data;
+ struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
+ int result = 0;
+ char mode_string[12] = {'\0'};
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_write_cooling_mode");
+
+ if (!tz || (count > sizeof(mode_string) - 1))
+ return_VALUE(-EINVAL);
+
+ if (!tz->flags.cooling_mode)
+ return_VALUE(-ENODEV);
+
+ if (copy_from_user(mode_string, buffer, count))
+ return_VALUE(-EFAULT);
+
+ mode_string[count] = '\0';
+
+ result = acpi_thermal_set_cooling_mode(tz,
+ simple_strtoul(mode_string, NULL, 0));
+ if (result)
+ return_VALUE(result);
+
+ acpi_thermal_check(tz);
+
+ return_VALUE(count);
+}
+
+
+static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show");
+
+ if (!tz)
+ goto end;
+
+ if (!tz->polling_frequency) {
+ seq_puts(seq, "<polling disabled>\n");
+ goto end;
+ }
+
+ seq_printf(seq, "polling frequency: %lu seconds\n",
+ (tz->polling_frequency / 10));
+
+end:
+ return_VALUE(0);
+}
+
+static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_thermal_polling_seq_show,
+ PDE(inode)->data);
+}
+
+static ssize_t
+acpi_thermal_write_polling (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+{
+ struct seq_file *m = (struct seq_file *)file->private_data;
+ struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
+ int result = 0;
+ char polling_string[12] = {'\0'};
+ int seconds = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_write_polling");
+
+ if (!tz || (count > sizeof(polling_string) - 1))
+ return_VALUE(-EINVAL);
+
+ if (copy_from_user(polling_string, buffer, count))
+ return_VALUE(-EFAULT);
+
+ polling_string[count] = '\0';
+
+ seconds = simple_strtoul(polling_string, NULL, 0);
+
+ result = acpi_thermal_set_polling(tz, seconds);
+ if (result)
+ return_VALUE(result);
+
+ acpi_thermal_check(tz);
+
+ return_VALUE(count);
+}
+
+
+static int
+acpi_thermal_add_fs (
+ struct acpi_device *device)
+{
+ struct proc_dir_entry *entry = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_add_fs");
+
+ if (!acpi_device_dir(device)) {
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+ acpi_thermal_dir);
+ if (!acpi_device_dir(device))
+ return_VALUE(-ENODEV);
+ acpi_device_dir(device)->owner = THIS_MODULE;
+ }
+
+ /* 'state' [R] */
+ entry = create_proc_entry(ACPI_THERMAL_FILE_STATE,
+ S_IRUGO, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ ACPI_THERMAL_FILE_STATE));
+ 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));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ ACPI_THERMAL_FILE_TEMPERATURE));
+ 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));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ ACPI_THERMAL_FILE_TRIP_POINTS));
+ 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));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ ACPI_THERMAL_FILE_COOLING_MODE));
+ 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));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ ACPI_THERMAL_FILE_POLLING_FREQ));
+ else {
+ entry->proc_fops = &acpi_thermal_polling_fops;
+ entry->data = acpi_driver_data(device);
+ entry->owner = THIS_MODULE;
+ }
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_thermal_remove_fs (
+ struct acpi_device *device)
+{
+ ACPI_FUNCTION_TRACE("acpi_thermal_remove_fs");
+
+ if (acpi_device_dir(device)) {
+ remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_THERMAL_FILE_STATE,
+ acpi_device_dir(device));
+ remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
+ acpi_device_dir(device) = NULL;
+ }
+
+ return_VALUE(0);
+}
+
+
+/* --------------------------------------------------------------------------
+ Driver Interface
+ -------------------------------------------------------------------------- */
+
+static void
+acpi_thermal_notify (
+ acpi_handle handle,
+ u32 event,
+ void *data)
+{
+ struct acpi_thermal *tz = (struct acpi_thermal *) data;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_notify");
+
+ if (!tz)
+ return_VOID;
+
+ if (acpi_bus_get_device(tz->handle, &device))
+ return_VOID;
+
+ 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_check(tz);
+ acpi_bus_generate_event(device, event, 0);
+ break;
+ case ACPI_THERMAL_NOTIFY_DEVICES:
+ if (tz->flags.devices)
+ acpi_thermal_get_devices(tz);
+ acpi_bus_generate_event(device, event, 0);
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+
+ return_VOID;
+}
+
+
+static int
+acpi_thermal_get_info (
+ struct acpi_thermal *tz)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_get_info");
+
+ if (!tz)
+ return_VALUE(-EINVAL);
+
+ /* Get temperature [_TMP] (required) */
+ result = acpi_thermal_get_temperature(tz);
+ if (result)
+ return_VALUE(result);
+
+ /* Get trip points [_CRT, _PSV, etc.] (required) */
+ result = acpi_thermal_get_trip_points(tz);
+ if (result)
+ return_VALUE(result);
+
+ /* Set the cooling mode [_SCP] to active cooling (default) */
+ result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
+ if (!result)
+ tz->flags.cooling_mode = 1;
+ else {
+ /* Oh,we have not _SCP method.
+ Generally show cooling_mode by _ACx, _PSV,spec 12.2*/
+ tz->flags.cooling_mode = 0;
+ if ( tz->trips.active[0].flags.valid && tz->trips.passive.flags.valid ) {
+ if ( tz->trips.passive.temperature > tz->trips.active[0].temperature )
+ tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE;
+ else
+ tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE;
+ } else if ( !tz->trips.active[0].flags.valid && tz->trips.passive.flags.valid ) {
+ tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE;
+ } else if ( tz->trips.active[0].flags.valid && !tz->trips.passive.flags.valid ) {
+ tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE;
+ } else {
+ /* _ACx and _PSV are optional, but _CRT is required */
+ tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL;
+ }
+ }
+
+ /* Get default polling frequency [_TZP] (optional) */
+ if (tzp)
+ tz->polling_frequency = tzp;
+ 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_VALUE(0);
+}
+
+
+static int
+acpi_thermal_add (
+ struct acpi_device *device)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_thermal *tz = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_add");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
+ if (!tz)
+ return_VALUE(-ENOMEM);
+ memset(tz, 0, sizeof(struct acpi_thermal));
+
+ tz->handle = device->handle;
+ 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;
+
+ result = acpi_thermal_get_info(tz);
+ if (result)
+ goto end;
+
+ result = acpi_thermal_add_fs(device);
+ if (result)
+ return_VALUE(result);
+
+ init_timer(&tz->timer);
+
+ acpi_thermal_check(tz);
+
+ status = acpi_install_notify_handler(tz->handle,
+ ACPI_DEVICE_NOTIFY, acpi_thermal_notify, tz);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error installing notify handler\n"));
+ result = -ENODEV;
+ goto end;
+ }
+
+ printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ KELVIN_TO_CELSIUS(tz->temperature));
+
+end:
+ if (result) {
+ acpi_thermal_remove_fs(device);
+ kfree(tz);
+ }
+
+ return_VALUE(result);
+}
+
+
+static int
+acpi_thermal_remove (
+ struct acpi_device *device,
+ int type)
+{
+ acpi_status status = AE_OK;
+ struct acpi_thermal *tz = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_remove");
+
+ if (!device || !acpi_driver_data(device))
+ return_VALUE(-EINVAL);
+
+ tz = (struct acpi_thermal *) 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(tz->handle,
+ ACPI_DEVICE_NOTIFY, acpi_thermal_notify);
+ if (ACPI_FAILURE(status))
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error removing notify handler\n"));
+
+ /* 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);
+
+ kfree(tz);
+ return_VALUE(0);
+}
+
+
+static int __init
+acpi_thermal_init (void)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_thermal_init");
+
+ acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
+ if (!acpi_thermal_dir)
+ return_VALUE(-ENODEV);
+ acpi_thermal_dir->owner = THIS_MODULE;
+
+ result = acpi_bus_register_driver(&acpi_thermal_driver);
+ if (result < 0) {
+ remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
+ return_VALUE(-ENODEV);
+ }
+
+ return_VALUE(0);
+}
+
+
+static void __exit
+acpi_thermal_exit (void)
+{
+ ACPI_FUNCTION_TRACE("acpi_thermal_exit");
+
+ acpi_bus_unregister_driver(&acpi_thermal_driver);
+
+ remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
+
+ return_VOID;
+}
+
+
+module_init(acpi_thermal_init);
+module_exit(acpi_thermal_exit);