| 1 | |
| 2 | |
| 3 | * user_space.c - A simple user space Thermal events notifier
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| 4 | *
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| 5 | * Copyright (C) 2012 Intel Corp
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| 6 | * Copyright (C) 2012 Durgadoss R <[email protected]>
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| 7 | *
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| 8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 9 | *
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| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 11 |
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| 12 |
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| 13 | #include <linux/slab.h>
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| 14 | #include <linux/thermal.h>
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| 15 |
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| 16 | #include "thermal_core.h"
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| 17 |
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| 18 | static int user_space_bind(struct thermal_zone_device *tz)
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| 19 | {
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| 20 | pr_info_once("Consider using thermal netlink events interface\n");
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| 21 |
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| 22 | return 0;
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| 23 | }
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| 24 |
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| 25 | |
| 26 | * user_space_trip_crossed - Notify user space about trip crossing events
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| 27 | * @tz: thermal_zone_device
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| 28 | * @trip: trip point
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| 29 | * @upward: whether or not the trip has been crossed on the way up
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| 30 | *
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| 31 | * This function notifies the user space through UEvents.
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| 32 |
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| 33 | static void user_space_trip_crossed(struct thermal_zone_device *tz,
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| 34 | const struct thermal_trip *trip,
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| 35 | bool upward)
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| 36 | {
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| 37 | char *thermal_prop[5];
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| 38 | int i;
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| 39 |
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| 40 | lockdep_assert_held(&tz->lock);
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| 41 |
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| 42 | thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
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| 43 | thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
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| 44 | thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d",
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| 45 | thermal_zone_trip_id(tz, trip));
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| 46 | thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
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| 47 | thermal_prop[4] = NULL;
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| 48 | kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
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| 49 | for (i = 0; i < 4; ++i)
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| 50 | kfree(thermal_prop[i]);
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| 51 | }
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| 52 |
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| 53 | static struct thermal_governor thermal_gov_user_space = {
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| 54 | .name = "user_space",
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| 55 | .trip_crossed = user_space_trip_crossed,
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| 56 | .bind_to_tz = user_space_bind,
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| 57 | };
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| 58 | THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);
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