forked from luck/tmp_suning_uos_patched
4b24ff7110
all pretty straightforward, except one thing. One of our patches added thermal support for power supply class, but thermal/ subsystem changed under our feet. We (well, Stephen, that is) caught the issue and it was decided[1] that I'd just delay the battery pull request, and then will fix it up by merging upstream back into battery tree at the specific commit. That's not all though: another[2] small fixup for thermal subsystem was needed to get rid of a warning in power supply subsystem (the warning was not drivers/power's "fault", the thermal registration function just needed a proper const annotation, which is also done by a small commit on top of the merge. So, to sum this up: - The 'master' branch of the battery tree was in the -next tree for weeks, was never rebased, altered etc. It should be all OK; - Although, for-v3.6 tag contains the 'master' branch + merge + the warning fix. [1] http://lkml.org/lkml/2012/6/19/23 [2] http://lkml.org/lkml/2012/6/18/28 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iQIcBAABAgAGBQJQF9V8AAoJEGgI9fZJve1bLvkP/j/Nt1fBud2w5Q/NJr310hYJ NWIMSJwFbMhPoNd7sESznogXH8eHQ6YJP+CmkA5Gxr0t8pjEEJHEEyEcf1eNv6/c YDZfDB3TIaeYzulvRUkXMQ1f7hiA5Bq2t13yXeMM19+r9DzNZ51jZ3TXETLkpWZG BfZPg5wmP0xssXB3fjJMWuW5hVEc503WLpLFXkWfWKMU3PGdy/8DckV/YLvf2l7K 1fkBLZry0gtruKqFbwcXhanP1JQ8FFFO8n1tSVLJhXXoym5twn/5GAgcpcKSFfJg mkGXAQLLuXKfERBIda7qbQl74HmTzYadCcueeXy1hTpom+VwfOpG+by2t/FrXT/M aJW6hfSLMgicG8FIuSYqbkutvijU9srU/YI00zrSGDBgi4sGKChRMf4sKQXnHO7X Lb7csQ7hEWsfG5gkgjRkmgZdhqWYoIxxe5Gv2Z9MKF27mHoSM03KHiZGlDJMrmNs w4KcU5H9tA62dT/UFszuu7NZenmsVS/ktiHWe5k+EXElZMZRrxKDJk2cvLPkRz/E VkXGvAmTDYPasZm29yzTnPKcuo6pfeOVJnUWybHOYxhkqAhJu1QzHCatqapgfy8E F2ODI5FoWtQES96B9t3tY4lTzq/0yUHcbiJt4BsyRcCGP+ggEQjCq0HGqOca12XX gxE20O3l+YQTCQIYKH+S =1NaS -----END PGP SIGNATURE----- Merge tag 'for-v3.6' of git://git.infradead.org/battery-2.6 Pull battery updates from Anton Vorontsov: "The tag contains just a few battery-related changes for v3.6. It's is all pretty straightforward, except one thing. One of our patches added thermal support for power supply class, but thermal/ subsystem changed under our feet. We (well, Stephen, that is) caught the issue and it was decided[1] that I'd just delay the battery pull request, and then will fix it up by merging upstream back into battery tree at the specific commit. That's not all though: another[2] small fixup for thermal subsystem was needed to get rid of a warning in power supply subsystem (the warning was not drivers/power's "fault", the thermal registration function just needed a proper const annotation, which is also done by a small commit on top of the merge. So, to sum this up: - The 'master' branch of the battery tree was in the -next tree for weeks, was never rebased, altered etc. It should be all OK; - Although, for-v3.6 tag contains the 'master' branch + merge + the warning fix. [1] http://lkml.org/lkml/2012/6/19/23 [2] http://lkml.org/lkml/2012/6/18/28" * tag 'for-v3.6' of git://git.infradead.org/battery-2.6: (23 commits) thermal: Constify 'type' argument for the registration routine olpc-battery: update CHARGE_FULL_DESIGN property for BYD LiFe batteries olpc-battery: Add VOLTAGE_MAX_DESIGN property charger-manager: Fix build break related to EXTCON lp8727_charger: Move header file into platform_data directory power_supply: Add min/max alert properties for CAPACITY, TEMP, TEMP_AMBIENT bq27x00_battery: Add support for BQ27425 chip charger-manager: Set current limit of regulator for over current protection charger-manager: Use EXTCON Subsystem to detect charger cables for charging test_power: Add VOLTAGE_NOW and BATTERY_TEMP properties test_power: Add support for USB AC source gpio-charger: Use cansleep version of gpio_set_value bq27x00_battery: Add support for power average and health properties sbs-battery: Don't trigger false supply_changed event twl4030_charger: Allow charger to control the regulator that feeds it twl4030_charger: Add backup-battery charging twl4030_charger: Fix some typos max17042_battery: Support CHARGE_COUNTER power supply attribute smb347-charger: Add constant charge and current properties power_supply: Add constant charge_current and charge_voltage properties ...
1538 lines
38 KiB
C
1538 lines
38 KiB
C
/*
|
|
* thermal.c - Generic Thermal Management Sysfs support.
|
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*
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* Copyright (C) 2008 Intel Corp
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* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
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* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/kdev_t.h>
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#include <linux/idr.h>
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#include <linux/thermal.h>
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#include <linux/spinlock.h>
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#include <linux/reboot.h>
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#include <net/netlink.h>
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#include <net/genetlink.h>
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MODULE_AUTHOR("Zhang Rui");
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MODULE_DESCRIPTION("Generic thermal management sysfs support");
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MODULE_LICENSE("GPL");
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struct thermal_cooling_device_instance {
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int id;
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char name[THERMAL_NAME_LENGTH];
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struct thermal_zone_device *tz;
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struct thermal_cooling_device *cdev;
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int trip;
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char attr_name[THERMAL_NAME_LENGTH];
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struct device_attribute attr;
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struct list_head node;
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};
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static DEFINE_IDR(thermal_tz_idr);
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static DEFINE_IDR(thermal_cdev_idr);
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static DEFINE_MUTEX(thermal_idr_lock);
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static LIST_HEAD(thermal_tz_list);
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static LIST_HEAD(thermal_cdev_list);
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static DEFINE_MUTEX(thermal_list_lock);
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static int get_idr(struct idr *idr, struct mutex *lock, int *id)
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{
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int err;
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again:
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if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
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return -ENOMEM;
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if (lock)
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mutex_lock(lock);
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err = idr_get_new(idr, NULL, id);
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if (lock)
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mutex_unlock(lock);
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if (unlikely(err == -EAGAIN))
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goto again;
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else if (unlikely(err))
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return err;
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*id = *id & MAX_ID_MASK;
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return 0;
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}
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static void release_idr(struct idr *idr, struct mutex *lock, int id)
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{
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if (lock)
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mutex_lock(lock);
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idr_remove(idr, id);
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if (lock)
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mutex_unlock(lock);
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}
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/* sys I/F for thermal zone */
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#define to_thermal_zone(_dev) \
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container_of(_dev, struct thermal_zone_device, device)
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|
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static ssize_t
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type_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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return sprintf(buf, "%s\n", tz->type);
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}
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static ssize_t
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temp_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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long temperature;
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int ret;
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if (!tz->ops->get_temp)
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return -EPERM;
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ret = tz->ops->get_temp(tz, &temperature);
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if (ret)
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return ret;
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return sprintf(buf, "%ld\n", temperature);
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}
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static ssize_t
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mode_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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enum thermal_device_mode mode;
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int result;
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if (!tz->ops->get_mode)
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return -EPERM;
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result = tz->ops->get_mode(tz, &mode);
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if (result)
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return result;
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return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled"
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: "disabled");
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}
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static ssize_t
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mode_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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int result;
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if (!tz->ops->set_mode)
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return -EPERM;
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if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
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result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED);
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else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
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result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED);
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else
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result = -EINVAL;
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if (result)
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return result;
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return count;
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}
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static ssize_t
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trip_point_type_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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enum thermal_trip_type type;
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int trip, result;
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if (!tz->ops->get_trip_type)
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return -EPERM;
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if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
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return -EINVAL;
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result = tz->ops->get_trip_type(tz, trip, &type);
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if (result)
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return result;
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switch (type) {
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case THERMAL_TRIP_CRITICAL:
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return sprintf(buf, "critical\n");
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case THERMAL_TRIP_HOT:
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return sprintf(buf, "hot\n");
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case THERMAL_TRIP_PASSIVE:
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return sprintf(buf, "passive\n");
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case THERMAL_TRIP_ACTIVE:
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return sprintf(buf, "active\n");
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default:
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return sprintf(buf, "unknown\n");
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}
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}
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static ssize_t
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trip_point_temp_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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int trip, ret;
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unsigned long temperature;
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if (!tz->ops->set_trip_temp)
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return -EPERM;
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if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
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return -EINVAL;
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if (kstrtoul(buf, 10, &temperature))
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return -EINVAL;
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ret = tz->ops->set_trip_temp(tz, trip, temperature);
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return ret ? ret : count;
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}
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static ssize_t
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trip_point_temp_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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int trip, ret;
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long temperature;
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if (!tz->ops->get_trip_temp)
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return -EPERM;
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if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
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return -EINVAL;
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ret = tz->ops->get_trip_temp(tz, trip, &temperature);
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if (ret)
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return ret;
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return sprintf(buf, "%ld\n", temperature);
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}
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static ssize_t
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trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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int trip, ret;
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unsigned long temperature;
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if (!tz->ops->set_trip_hyst)
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return -EPERM;
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if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
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return -EINVAL;
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if (kstrtoul(buf, 10, &temperature))
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return -EINVAL;
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/*
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* We are not doing any check on the 'temperature' value
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* here. The driver implementing 'set_trip_hyst' has to
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* take care of this.
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*/
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ret = tz->ops->set_trip_hyst(tz, trip, temperature);
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return ret ? ret : count;
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}
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static ssize_t
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trip_point_hyst_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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|
{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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int trip, ret;
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unsigned long temperature;
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if (!tz->ops->get_trip_hyst)
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return -EPERM;
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if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
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return -EINVAL;
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ret = tz->ops->get_trip_hyst(tz, trip, &temperature);
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return ret ? ret : sprintf(buf, "%ld\n", temperature);
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}
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|
|
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static ssize_t
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|
passive_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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|
{
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|
struct thermal_zone_device *tz = to_thermal_zone(dev);
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struct thermal_cooling_device *cdev = NULL;
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int state;
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|
|
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if (!sscanf(buf, "%d\n", &state))
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return -EINVAL;
|
|
|
|
/* sanity check: values below 1000 millicelcius don't make sense
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* and can cause the system to go into a thermal heart attack
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*/
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if (state && state < 1000)
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return -EINVAL;
|
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|
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if (state && !tz->forced_passive) {
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mutex_lock(&thermal_list_lock);
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list_for_each_entry(cdev, &thermal_cdev_list, node) {
|
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if (!strncmp("Processor", cdev->type,
|
|
sizeof("Processor")))
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|
thermal_zone_bind_cooling_device(tz,
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THERMAL_TRIPS_NONE,
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cdev);
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}
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mutex_unlock(&thermal_list_lock);
|
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if (!tz->passive_delay)
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tz->passive_delay = 1000;
|
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} else if (!state && tz->forced_passive) {
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mutex_lock(&thermal_list_lock);
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list_for_each_entry(cdev, &thermal_cdev_list, node) {
|
|
if (!strncmp("Processor", cdev->type,
|
|
sizeof("Processor")))
|
|
thermal_zone_unbind_cooling_device(tz,
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THERMAL_TRIPS_NONE,
|
|
cdev);
|
|
}
|
|
mutex_unlock(&thermal_list_lock);
|
|
tz->passive_delay = 0;
|
|
}
|
|
|
|
tz->tc1 = 1;
|
|
tz->tc2 = 1;
|
|
|
|
tz->forced_passive = state;
|
|
|
|
thermal_zone_device_update(tz);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t
|
|
passive_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct thermal_zone_device *tz = to_thermal_zone(dev);
|
|
|
|
return sprintf(buf, "%d\n", tz->forced_passive);
|
|
}
|
|
|
|
static DEVICE_ATTR(type, 0444, type_show, NULL);
|
|
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);
|
|
|
|
/* sys I/F for cooling device */
|
|
#define to_cooling_device(_dev) \
|
|
container_of(_dev, struct thermal_cooling_device, device)
|
|
|
|
static ssize_t
|
|
thermal_cooling_device_type_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct thermal_cooling_device *cdev = to_cooling_device(dev);
|
|
|
|
return sprintf(buf, "%s\n", cdev->type);
|
|
}
|
|
|
|
static ssize_t
|
|
thermal_cooling_device_max_state_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct thermal_cooling_device *cdev = to_cooling_device(dev);
|
|
unsigned long state;
|
|
int ret;
|
|
|
|
ret = cdev->ops->get_max_state(cdev, &state);
|
|
if (ret)
|
|
return ret;
|
|
return sprintf(buf, "%ld\n", state);
|
|
}
|
|
|
|
static ssize_t
|
|
thermal_cooling_device_cur_state_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct thermal_cooling_device *cdev = to_cooling_device(dev);
|
|
unsigned long state;
|
|
int ret;
|
|
|
|
ret = cdev->ops->get_cur_state(cdev, &state);
|
|
if (ret)
|
|
return ret;
|
|
return sprintf(buf, "%ld\n", state);
|
|
}
|
|
|
|
static ssize_t
|
|
thermal_cooling_device_cur_state_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct thermal_cooling_device *cdev = to_cooling_device(dev);
|
|
unsigned long state;
|
|
int result;
|
|
|
|
if (!sscanf(buf, "%ld\n", &state))
|
|
return -EINVAL;
|
|
|
|
if ((long)state < 0)
|
|
return -EINVAL;
|
|
|
|
result = cdev->ops->set_cur_state(cdev, state);
|
|
if (result)
|
|
return result;
|
|
return count;
|
|
}
|
|
|
|
static struct device_attribute dev_attr_cdev_type =
|
|
__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
|
|
static DEVICE_ATTR(max_state, 0444,
|
|
thermal_cooling_device_max_state_show, NULL);
|
|
static DEVICE_ATTR(cur_state, 0644,
|
|
thermal_cooling_device_cur_state_show,
|
|
thermal_cooling_device_cur_state_store);
|
|
|
|
static ssize_t
|
|
thermal_cooling_device_trip_point_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct thermal_cooling_device_instance *instance;
|
|
|
|
instance =
|
|
container_of(attr, struct thermal_cooling_device_instance, attr);
|
|
|
|
if (instance->trip == THERMAL_TRIPS_NONE)
|
|
return sprintf(buf, "-1\n");
|
|
else
|
|
return sprintf(buf, "%d\n", instance->trip);
|
|
}
|
|
|
|
/* Device management */
|
|
|
|
#if defined(CONFIG_THERMAL_HWMON)
|
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/* hwmon sys I/F */
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#include <linux/hwmon.h>
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/* thermal zone devices with the same type share one hwmon device */
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struct thermal_hwmon_device {
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char type[THERMAL_NAME_LENGTH];
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struct device *device;
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int count;
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struct list_head tz_list;
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struct list_head node;
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};
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struct thermal_hwmon_attr {
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struct device_attribute attr;
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char name[16];
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};
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/* one temperature input for each thermal zone */
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struct thermal_hwmon_temp {
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struct list_head hwmon_node;
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struct thermal_zone_device *tz;
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struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
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struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
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};
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static LIST_HEAD(thermal_hwmon_list);
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static ssize_t
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name_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", hwmon->type);
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}
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static DEVICE_ATTR(name, 0444, name_show, NULL);
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static ssize_t
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temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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long temperature;
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int ret;
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struct thermal_hwmon_attr *hwmon_attr
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= container_of(attr, struct thermal_hwmon_attr, attr);
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struct thermal_hwmon_temp *temp
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= container_of(hwmon_attr, struct thermal_hwmon_temp,
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temp_input);
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struct thermal_zone_device *tz = temp->tz;
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ret = tz->ops->get_temp(tz, &temperature);
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if (ret)
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return ret;
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return sprintf(buf, "%ld\n", temperature);
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}
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static ssize_t
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temp_crit_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct thermal_hwmon_attr *hwmon_attr
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= container_of(attr, struct thermal_hwmon_attr, attr);
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struct thermal_hwmon_temp *temp
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= container_of(hwmon_attr, struct thermal_hwmon_temp,
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temp_crit);
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struct thermal_zone_device *tz = temp->tz;
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long temperature;
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int ret;
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ret = tz->ops->get_trip_temp(tz, 0, &temperature);
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if (ret)
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return ret;
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return sprintf(buf, "%ld\n", temperature);
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}
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static struct thermal_hwmon_device *
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thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz)
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{
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struct thermal_hwmon_device *hwmon;
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mutex_lock(&thermal_list_lock);
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list_for_each_entry(hwmon, &thermal_hwmon_list, node)
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if (!strcmp(hwmon->type, tz->type)) {
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mutex_unlock(&thermal_list_lock);
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return hwmon;
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}
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mutex_unlock(&thermal_list_lock);
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return NULL;
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}
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/* Find the temperature input matching a given thermal zone */
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static struct thermal_hwmon_temp *
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thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
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const struct thermal_zone_device *tz)
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{
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struct thermal_hwmon_temp *temp;
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mutex_lock(&thermal_list_lock);
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list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
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if (temp->tz == tz) {
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mutex_unlock(&thermal_list_lock);
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return temp;
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}
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mutex_unlock(&thermal_list_lock);
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return NULL;
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}
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static int
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thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
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{
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struct thermal_hwmon_device *hwmon;
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struct thermal_hwmon_temp *temp;
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int new_hwmon_device = 1;
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int result;
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hwmon = thermal_hwmon_lookup_by_type(tz);
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if (hwmon) {
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new_hwmon_device = 0;
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goto register_sys_interface;
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}
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hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL);
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if (!hwmon)
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return -ENOMEM;
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INIT_LIST_HEAD(&hwmon->tz_list);
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strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
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hwmon->device = hwmon_device_register(NULL);
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if (IS_ERR(hwmon->device)) {
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result = PTR_ERR(hwmon->device);
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goto free_mem;
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}
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dev_set_drvdata(hwmon->device, hwmon);
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result = device_create_file(hwmon->device, &dev_attr_name);
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if (result)
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goto free_mem;
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register_sys_interface:
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temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
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if (!temp) {
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result = -ENOMEM;
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goto unregister_name;
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}
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temp->tz = tz;
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hwmon->count++;
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snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH,
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"temp%d_input", hwmon->count);
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temp->temp_input.attr.attr.name = temp->temp_input.name;
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temp->temp_input.attr.attr.mode = 0444;
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temp->temp_input.attr.show = temp_input_show;
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sysfs_attr_init(&temp->temp_input.attr.attr);
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result = device_create_file(hwmon->device, &temp->temp_input.attr);
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if (result)
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goto free_temp_mem;
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if (tz->ops->get_crit_temp) {
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unsigned long temperature;
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if (!tz->ops->get_crit_temp(tz, &temperature)) {
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snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH,
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"temp%d_crit", hwmon->count);
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temp->temp_crit.attr.attr.name = temp->temp_crit.name;
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temp->temp_crit.attr.attr.mode = 0444;
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temp->temp_crit.attr.show = temp_crit_show;
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sysfs_attr_init(&temp->temp_crit.attr.attr);
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result = device_create_file(hwmon->device,
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&temp->temp_crit.attr);
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if (result)
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goto unregister_input;
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}
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}
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mutex_lock(&thermal_list_lock);
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if (new_hwmon_device)
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list_add_tail(&hwmon->node, &thermal_hwmon_list);
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list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
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mutex_unlock(&thermal_list_lock);
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return 0;
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unregister_input:
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device_remove_file(hwmon->device, &temp->temp_input.attr);
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free_temp_mem:
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kfree(temp);
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unregister_name:
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if (new_hwmon_device) {
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device_remove_file(hwmon->device, &dev_attr_name);
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hwmon_device_unregister(hwmon->device);
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}
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free_mem:
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if (new_hwmon_device)
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kfree(hwmon);
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return result;
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}
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static void
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thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
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{
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struct thermal_hwmon_device *hwmon;
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struct thermal_hwmon_temp *temp;
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hwmon = thermal_hwmon_lookup_by_type(tz);
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if (unlikely(!hwmon)) {
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/* Should never happen... */
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dev_dbg(&tz->device, "hwmon device lookup failed!\n");
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return;
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}
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temp = thermal_hwmon_lookup_temp(hwmon, tz);
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if (unlikely(!temp)) {
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/* Should never happen... */
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dev_dbg(&tz->device, "temperature input lookup failed!\n");
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return;
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}
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device_remove_file(hwmon->device, &temp->temp_input.attr);
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if (tz->ops->get_crit_temp)
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device_remove_file(hwmon->device, &temp->temp_crit.attr);
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mutex_lock(&thermal_list_lock);
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list_del(&temp->hwmon_node);
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kfree(temp);
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if (!list_empty(&hwmon->tz_list)) {
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mutex_unlock(&thermal_list_lock);
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return;
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}
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list_del(&hwmon->node);
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mutex_unlock(&thermal_list_lock);
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device_remove_file(hwmon->device, &dev_attr_name);
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hwmon_device_unregister(hwmon->device);
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kfree(hwmon);
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}
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#else
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static int
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thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
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{
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return 0;
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}
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static void
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thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
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{
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}
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#endif
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static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
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int delay)
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{
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cancel_delayed_work(&(tz->poll_queue));
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if (!delay)
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return;
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if (delay > 1000)
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queue_delayed_work(system_freezable_wq, &(tz->poll_queue),
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round_jiffies(msecs_to_jiffies(delay)));
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else
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queue_delayed_work(system_freezable_wq, &(tz->poll_queue),
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msecs_to_jiffies(delay));
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}
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static void thermal_zone_device_passive(struct thermal_zone_device *tz,
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int temp, int trip_temp, int trip)
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{
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int trend = 0;
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struct thermal_cooling_device_instance *instance;
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struct thermal_cooling_device *cdev;
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long state, max_state;
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/*
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* Above Trip?
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* -----------
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* Calculate the thermal trend (using the passive cooling equation)
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* and modify the performance limit for all passive cooling devices
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* accordingly. Note that we assume symmetry.
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*/
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if (temp >= trip_temp) {
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tz->passive = true;
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trend = (tz->tc1 * (temp - tz->last_temperature)) +
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(tz->tc2 * (temp - trip_temp));
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/* Heating up? */
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if (trend > 0) {
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list_for_each_entry(instance, &tz->cooling_devices,
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node) {
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if (instance->trip != trip)
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continue;
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cdev = instance->cdev;
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cdev->ops->get_cur_state(cdev, &state);
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cdev->ops->get_max_state(cdev, &max_state);
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if (state++ < max_state)
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cdev->ops->set_cur_state(cdev, state);
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}
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} else if (trend < 0) { /* Cooling off? */
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list_for_each_entry(instance, &tz->cooling_devices,
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node) {
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if (instance->trip != trip)
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continue;
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cdev = instance->cdev;
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cdev->ops->get_cur_state(cdev, &state);
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cdev->ops->get_max_state(cdev, &max_state);
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if (state > 0)
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cdev->ops->set_cur_state(cdev, --state);
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}
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}
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return;
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}
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/*
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* Below Trip?
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* -----------
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* Implement passive cooling hysteresis to slowly increase performance
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* and avoid thrashing around the passive trip point. Note that we
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* assume symmetry.
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*/
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list_for_each_entry(instance, &tz->cooling_devices, node) {
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if (instance->trip != trip)
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continue;
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cdev = instance->cdev;
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cdev->ops->get_cur_state(cdev, &state);
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cdev->ops->get_max_state(cdev, &max_state);
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if (state > 0)
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cdev->ops->set_cur_state(cdev, --state);
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if (state == 0)
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tz->passive = false;
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}
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}
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static void thermal_zone_device_check(struct work_struct *work)
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{
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struct thermal_zone_device *tz = container_of(work, struct
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thermal_zone_device,
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poll_queue.work);
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thermal_zone_device_update(tz);
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}
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/**
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* thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
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* @tz: thermal zone device
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* @trip: indicates which trip point the cooling devices is
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* associated with in this thermal zone.
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* @cdev: thermal cooling device
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*
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* This function is usually called in the thermal zone device .bind callback.
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*/
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int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
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int trip,
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struct thermal_cooling_device *cdev)
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{
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struct thermal_cooling_device_instance *dev;
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struct thermal_cooling_device_instance *pos;
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struct thermal_zone_device *pos1;
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struct thermal_cooling_device *pos2;
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int result;
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if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
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return -EINVAL;
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list_for_each_entry(pos1, &thermal_tz_list, node) {
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if (pos1 == tz)
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break;
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}
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list_for_each_entry(pos2, &thermal_cdev_list, node) {
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if (pos2 == cdev)
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break;
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}
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if (tz != pos1 || cdev != pos2)
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return -EINVAL;
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dev =
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kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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dev->tz = tz;
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dev->cdev = cdev;
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dev->trip = trip;
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result = get_idr(&tz->idr, &tz->lock, &dev->id);
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if (result)
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goto free_mem;
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sprintf(dev->name, "cdev%d", dev->id);
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result =
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sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
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if (result)
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goto release_idr;
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sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
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sysfs_attr_init(&dev->attr.attr);
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dev->attr.attr.name = dev->attr_name;
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dev->attr.attr.mode = 0444;
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dev->attr.show = thermal_cooling_device_trip_point_show;
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result = device_create_file(&tz->device, &dev->attr);
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if (result)
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goto remove_symbol_link;
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mutex_lock(&tz->lock);
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list_for_each_entry(pos, &tz->cooling_devices, node)
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if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
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result = -EEXIST;
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break;
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}
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if (!result)
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list_add_tail(&dev->node, &tz->cooling_devices);
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mutex_unlock(&tz->lock);
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if (!result)
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return 0;
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device_remove_file(&tz->device, &dev->attr);
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remove_symbol_link:
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sysfs_remove_link(&tz->device.kobj, dev->name);
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release_idr:
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release_idr(&tz->idr, &tz->lock, dev->id);
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free_mem:
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kfree(dev);
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return result;
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}
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EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
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/**
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* thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
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* @tz: thermal zone device
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* @trip: indicates which trip point the cooling devices is
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* associated with in this thermal zone.
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* @cdev: thermal cooling device
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*
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* This function is usually called in the thermal zone device .unbind callback.
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*/
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int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
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int trip,
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struct thermal_cooling_device *cdev)
|
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{
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struct thermal_cooling_device_instance *pos, *next;
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|
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mutex_lock(&tz->lock);
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list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
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if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
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list_del(&pos->node);
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mutex_unlock(&tz->lock);
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goto unbind;
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}
|
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}
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mutex_unlock(&tz->lock);
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|
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return -ENODEV;
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|
|
|
unbind:
|
|
device_remove_file(&tz->device, &pos->attr);
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sysfs_remove_link(&tz->device.kobj, pos->name);
|
|
release_idr(&tz->idr, &tz->lock, pos->id);
|
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kfree(pos);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
|
|
|
|
static void thermal_release(struct device *dev)
|
|
{
|
|
struct thermal_zone_device *tz;
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
if (!strncmp(dev_name(dev), "thermal_zone",
|
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sizeof("thermal_zone") - 1)) {
|
|
tz = to_thermal_zone(dev);
|
|
kfree(tz);
|
|
} else {
|
|
cdev = to_cooling_device(dev);
|
|
kfree(cdev);
|
|
}
|
|
}
|
|
|
|
static struct class thermal_class = {
|
|
.name = "thermal",
|
|
.dev_release = thermal_release,
|
|
};
|
|
|
|
/**
|
|
* thermal_cooling_device_register - register a new thermal cooling device
|
|
* @type: the thermal cooling device type.
|
|
* @devdata: device private data.
|
|
* @ops: standard thermal cooling devices callbacks.
|
|
*/
|
|
struct thermal_cooling_device *
|
|
thermal_cooling_device_register(char *type, void *devdata,
|
|
const struct thermal_cooling_device_ops *ops)
|
|
{
|
|
struct thermal_cooling_device *cdev;
|
|
struct thermal_zone_device *pos;
|
|
int result;
|
|
|
|
if (strlen(type) >= THERMAL_NAME_LENGTH)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if (!ops || !ops->get_max_state || !ops->get_cur_state ||
|
|
!ops->set_cur_state)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
|
|
if (!cdev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
|
|
if (result) {
|
|
kfree(cdev);
|
|
return ERR_PTR(result);
|
|
}
|
|
|
|
strcpy(cdev->type, type);
|
|
cdev->ops = ops;
|
|
cdev->device.class = &thermal_class;
|
|
cdev->devdata = devdata;
|
|
dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
|
|
result = device_register(&cdev->device);
|
|
if (result) {
|
|
release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
|
|
kfree(cdev);
|
|
return ERR_PTR(result);
|
|
}
|
|
|
|
/* sys I/F */
|
|
if (type) {
|
|
result = device_create_file(&cdev->device, &dev_attr_cdev_type);
|
|
if (result)
|
|
goto unregister;
|
|
}
|
|
|
|
result = device_create_file(&cdev->device, &dev_attr_max_state);
|
|
if (result)
|
|
goto unregister;
|
|
|
|
result = device_create_file(&cdev->device, &dev_attr_cur_state);
|
|
if (result)
|
|
goto unregister;
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
list_add(&cdev->node, &thermal_cdev_list);
|
|
list_for_each_entry(pos, &thermal_tz_list, node) {
|
|
if (!pos->ops->bind)
|
|
continue;
|
|
result = pos->ops->bind(pos, cdev);
|
|
if (result)
|
|
break;
|
|
|
|
}
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
if (!result)
|
|
return cdev;
|
|
|
|
unregister:
|
|
release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
|
|
device_unregister(&cdev->device);
|
|
return ERR_PTR(result);
|
|
}
|
|
EXPORT_SYMBOL(thermal_cooling_device_register);
|
|
|
|
/**
|
|
* thermal_cooling_device_unregister - removes the registered thermal cooling device
|
|
* @cdev: the thermal cooling device to remove.
|
|
*
|
|
* thermal_cooling_device_unregister() must be called when the device is no
|
|
* longer needed.
|
|
*/
|
|
void thermal_cooling_device_unregister(struct
|
|
thermal_cooling_device
|
|
*cdev)
|
|
{
|
|
struct thermal_zone_device *tz;
|
|
struct thermal_cooling_device *pos = NULL;
|
|
|
|
if (!cdev)
|
|
return;
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
list_for_each_entry(pos, &thermal_cdev_list, node)
|
|
if (pos == cdev)
|
|
break;
|
|
if (pos != cdev) {
|
|
/* thermal cooling device not found */
|
|
mutex_unlock(&thermal_list_lock);
|
|
return;
|
|
}
|
|
list_del(&cdev->node);
|
|
list_for_each_entry(tz, &thermal_tz_list, node) {
|
|
if (!tz->ops->unbind)
|
|
continue;
|
|
tz->ops->unbind(tz, cdev);
|
|
}
|
|
mutex_unlock(&thermal_list_lock);
|
|
if (cdev->type[0])
|
|
device_remove_file(&cdev->device, &dev_attr_cdev_type);
|
|
device_remove_file(&cdev->device, &dev_attr_max_state);
|
|
device_remove_file(&cdev->device, &dev_attr_cur_state);
|
|
|
|
release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
|
|
device_unregister(&cdev->device);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(thermal_cooling_device_unregister);
|
|
|
|
/**
|
|
* thermal_zone_device_update - force an update of a thermal zone's state
|
|
* @ttz: the thermal zone to update
|
|
*/
|
|
|
|
void thermal_zone_device_update(struct thermal_zone_device *tz)
|
|
{
|
|
int count, ret = 0;
|
|
long temp, trip_temp;
|
|
enum thermal_trip_type trip_type;
|
|
struct thermal_cooling_device_instance *instance;
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
mutex_lock(&tz->lock);
|
|
|
|
if (tz->ops->get_temp(tz, &temp)) {
|
|
/* get_temp failed - retry it later */
|
|
pr_warn("failed to read out thermal zone %d\n", tz->id);
|
|
goto leave;
|
|
}
|
|
|
|
for (count = 0; count < tz->trips; count++) {
|
|
tz->ops->get_trip_type(tz, count, &trip_type);
|
|
tz->ops->get_trip_temp(tz, count, &trip_temp);
|
|
|
|
switch (trip_type) {
|
|
case THERMAL_TRIP_CRITICAL:
|
|
if (temp >= trip_temp) {
|
|
if (tz->ops->notify)
|
|
ret = tz->ops->notify(tz, count,
|
|
trip_type);
|
|
if (!ret) {
|
|
pr_emerg("Critical temperature reached (%ld C), shutting down\n",
|
|
temp/1000);
|
|
orderly_poweroff(true);
|
|
}
|
|
}
|
|
break;
|
|
case THERMAL_TRIP_HOT:
|
|
if (temp >= trip_temp)
|
|
if (tz->ops->notify)
|
|
tz->ops->notify(tz, count, trip_type);
|
|
break;
|
|
case THERMAL_TRIP_ACTIVE:
|
|
list_for_each_entry(instance, &tz->cooling_devices,
|
|
node) {
|
|
if (instance->trip != count)
|
|
continue;
|
|
|
|
cdev = instance->cdev;
|
|
|
|
if (temp >= trip_temp)
|
|
cdev->ops->set_cur_state(cdev, 1);
|
|
else
|
|
cdev->ops->set_cur_state(cdev, 0);
|
|
}
|
|
break;
|
|
case THERMAL_TRIP_PASSIVE:
|
|
if (temp >= trip_temp || tz->passive)
|
|
thermal_zone_device_passive(tz, temp,
|
|
trip_temp, count);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (tz->forced_passive)
|
|
thermal_zone_device_passive(tz, temp, tz->forced_passive,
|
|
THERMAL_TRIPS_NONE);
|
|
|
|
tz->last_temperature = temp;
|
|
|
|
leave:
|
|
if (tz->passive)
|
|
thermal_zone_device_set_polling(tz, tz->passive_delay);
|
|
else if (tz->polling_delay)
|
|
thermal_zone_device_set_polling(tz, tz->polling_delay);
|
|
else
|
|
thermal_zone_device_set_polling(tz, 0);
|
|
mutex_unlock(&tz->lock);
|
|
}
|
|
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
|
|
* @tc2: thermal coefficient 2 for passive calculations
|
|
* @passive_delay: number of milliseconds to wait between polls when
|
|
* performing passive cooling
|
|
* @polling_delay: number of milliseconds to wait between polls when checking
|
|
* whether trip points have been crossed (0 for interrupt
|
|
* driven systems)
|
|
*
|
|
* thermal_zone_device_unregister() must be called when the device is no
|
|
* longer needed. The passive cooling formula uses tc1 and tc2 as described in
|
|
* section 11.1.5.1 of the ACPI specification 3.0.
|
|
*/
|
|
struct thermal_zone_device *thermal_zone_device_register(const char *type,
|
|
int trips, int mask, void *devdata,
|
|
const struct thermal_zone_device_ops *ops,
|
|
int tc1, int tc2, int passive_delay, int polling_delay)
|
|
{
|
|
struct thermal_zone_device *tz;
|
|
struct thermal_cooling_device *pos;
|
|
enum thermal_trip_type trip_type;
|
|
int result;
|
|
int count;
|
|
int passive = 0;
|
|
|
|
if (strlen(type) >= THERMAL_NAME_LENGTH)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if (!ops || !ops->get_temp)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
|
|
if (!tz)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
INIT_LIST_HEAD(&tz->cooling_devices);
|
|
idr_init(&tz->idr);
|
|
mutex_init(&tz->lock);
|
|
result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
|
|
if (result) {
|
|
kfree(tz);
|
|
return ERR_PTR(result);
|
|
}
|
|
|
|
strcpy(tz->type, type);
|
|
tz->ops = ops;
|
|
tz->device.class = &thermal_class;
|
|
tz->devdata = devdata;
|
|
tz->trips = trips;
|
|
tz->tc1 = tc1;
|
|
tz->tc2 = tc2;
|
|
tz->passive_delay = passive_delay;
|
|
tz->polling_delay = polling_delay;
|
|
|
|
dev_set_name(&tz->device, "thermal_zone%d", tz->id);
|
|
result = device_register(&tz->device);
|
|
if (result) {
|
|
release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
|
|
kfree(tz);
|
|
return ERR_PTR(result);
|
|
}
|
|
|
|
/* sys I/F */
|
|
if (type) {
|
|
result = device_create_file(&tz->device, &dev_attr_type);
|
|
if (result)
|
|
goto unregister;
|
|
}
|
|
|
|
result = device_create_file(&tz->device, &dev_attr_temp);
|
|
if (result)
|
|
goto unregister;
|
|
|
|
if (ops->get_mode) {
|
|
result = device_create_file(&tz->device, &dev_attr_mode);
|
|
if (result)
|
|
goto unregister;
|
|
}
|
|
|
|
result = create_trip_attrs(tz, mask);
|
|
if (result)
|
|
goto unregister;
|
|
|
|
for (count = 0; count < trips; count++) {
|
|
tz->ops->get_trip_type(tz, count, &trip_type);
|
|
if (trip_type == THERMAL_TRIP_PASSIVE)
|
|
passive = 1;
|
|
}
|
|
|
|
if (!passive)
|
|
result = device_create_file(&tz->device,
|
|
&dev_attr_passive);
|
|
|
|
if (result)
|
|
goto unregister;
|
|
|
|
result = thermal_add_hwmon_sysfs(tz);
|
|
if (result)
|
|
goto unregister;
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
list_add_tail(&tz->node, &thermal_tz_list);
|
|
if (ops->bind)
|
|
list_for_each_entry(pos, &thermal_cdev_list, node) {
|
|
result = ops->bind(tz, pos);
|
|
if (result)
|
|
break;
|
|
}
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check);
|
|
|
|
thermal_zone_device_update(tz);
|
|
|
|
if (!result)
|
|
return tz;
|
|
|
|
unregister:
|
|
release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
|
|
device_unregister(&tz->device);
|
|
return ERR_PTR(result);
|
|
}
|
|
EXPORT_SYMBOL(thermal_zone_device_register);
|
|
|
|
/**
|
|
* thermal_device_unregister - removes the registered thermal zone device
|
|
* @tz: the thermal zone device to remove
|
|
*/
|
|
void thermal_zone_device_unregister(struct thermal_zone_device *tz)
|
|
{
|
|
struct thermal_cooling_device *cdev;
|
|
struct thermal_zone_device *pos = NULL;
|
|
|
|
if (!tz)
|
|
return;
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
list_for_each_entry(pos, &thermal_tz_list, node)
|
|
if (pos == tz)
|
|
break;
|
|
if (pos != tz) {
|
|
/* thermal zone device not found */
|
|
mutex_unlock(&thermal_list_lock);
|
|
return;
|
|
}
|
|
list_del(&tz->node);
|
|
if (tz->ops->unbind)
|
|
list_for_each_entry(cdev, &thermal_cdev_list, node)
|
|
tz->ops->unbind(tz, cdev);
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
thermal_zone_device_set_polling(tz, 0);
|
|
|
|
if (tz->type[0])
|
|
device_remove_file(&tz->device, &dev_attr_type);
|
|
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);
|
|
|
|
thermal_remove_hwmon_sysfs(tz);
|
|
release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
|
|
idr_destroy(&tz->idr);
|
|
mutex_destroy(&tz->lock);
|
|
device_unregister(&tz->device);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(thermal_zone_device_unregister);
|
|
|
|
#ifdef CONFIG_NET
|
|
static struct genl_family thermal_event_genl_family = {
|
|
.id = GENL_ID_GENERATE,
|
|
.name = THERMAL_GENL_FAMILY_NAME,
|
|
.version = THERMAL_GENL_VERSION,
|
|
.maxattr = THERMAL_GENL_ATTR_MAX,
|
|
};
|
|
|
|
static struct genl_multicast_group thermal_event_mcgrp = {
|
|
.name = THERMAL_GENL_MCAST_GROUP_NAME,
|
|
};
|
|
|
|
int thermal_generate_netlink_event(u32 orig, enum events event)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct nlattr *attr;
|
|
struct thermal_genl_event *thermal_event;
|
|
void *msg_header;
|
|
int size;
|
|
int result;
|
|
static unsigned int thermal_event_seqnum;
|
|
|
|
/* allocate memory */
|
|
size = nla_total_size(sizeof(struct thermal_genl_event)) +
|
|
nla_total_size(0);
|
|
|
|
skb = genlmsg_new(size, GFP_ATOMIC);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
/* add the genetlink message header */
|
|
msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++,
|
|
&thermal_event_genl_family, 0,
|
|
THERMAL_GENL_CMD_EVENT);
|
|
if (!msg_header) {
|
|
nlmsg_free(skb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* fill the data */
|
|
attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT,
|
|
sizeof(struct thermal_genl_event));
|
|
|
|
if (!attr) {
|
|
nlmsg_free(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
thermal_event = nla_data(attr);
|
|
if (!thermal_event) {
|
|
nlmsg_free(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(thermal_event, 0, sizeof(struct thermal_genl_event));
|
|
|
|
thermal_event->orig = orig;
|
|
thermal_event->event = event;
|
|
|
|
/* send multicast genetlink message */
|
|
result = genlmsg_end(skb, msg_header);
|
|
if (result < 0) {
|
|
nlmsg_free(skb);
|
|
return result;
|
|
}
|
|
|
|
result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC);
|
|
if (result)
|
|
pr_info("failed to send netlink event:%d\n", result);
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(thermal_generate_netlink_event);
|
|
|
|
static int genetlink_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = genl_register_family(&thermal_event_genl_family);
|
|
if (result)
|
|
return result;
|
|
|
|
result = genl_register_mc_group(&thermal_event_genl_family,
|
|
&thermal_event_mcgrp);
|
|
if (result)
|
|
genl_unregister_family(&thermal_event_genl_family);
|
|
return result;
|
|
}
|
|
|
|
static void genetlink_exit(void)
|
|
{
|
|
genl_unregister_family(&thermal_event_genl_family);
|
|
}
|
|
#else /* !CONFIG_NET */
|
|
static inline int genetlink_init(void) { return 0; }
|
|
static inline void genetlink_exit(void) {}
|
|
#endif /* !CONFIG_NET */
|
|
|
|
static int __init thermal_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
result = class_register(&thermal_class);
|
|
if (result) {
|
|
idr_destroy(&thermal_tz_idr);
|
|
idr_destroy(&thermal_cdev_idr);
|
|
mutex_destroy(&thermal_idr_lock);
|
|
mutex_destroy(&thermal_list_lock);
|
|
}
|
|
result = genetlink_init();
|
|
return result;
|
|
}
|
|
|
|
static void __exit thermal_exit(void)
|
|
{
|
|
class_unregister(&thermal_class);
|
|
idr_destroy(&thermal_tz_idr);
|
|
idr_destroy(&thermal_cdev_idr);
|
|
mutex_destroy(&thermal_idr_lock);
|
|
mutex_destroy(&thermal_list_lock);
|
|
genetlink_exit();
|
|
}
|
|
|
|
fs_initcall(thermal_init);
|
|
module_exit(thermal_exit);
|