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bff5a49e6d
No functional changes. BUG=chrome-os-partner:15579 BRANCH=none TEST='temps' should print good temperatures Change-Id: I20bd2376b86f1e9d2f9a91016ed90bb933235021 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/36611
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Thermal engine module for Chrome EC */
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#ifndef __CROS_EC_THERMAL_H
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#define __CROS_EC_THERMAL_H
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#include "temp_sensor.h"
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#define THERMAL_CONFIG_NO_FLAG 0x0
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#define THERMAL_CONFIG_WARNING_ON_FAIL 0x1
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/*
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* Number of steps for fan speed control. Speed of each step is defined
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* in thermal.c.
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*/
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#define THERMAL_FAN_STEPS 5
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/* Set a threshold temperature to this value to disable the threshold limit. */
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#define THERMAL_THRESHOLD_DISABLE 0
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/* This macro is used to disable all threshold for a sensor. The value 0
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* expands to all field in the array 'thresholds'. Change this if
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* THERMAL_THRESHOLD_DISABLE is no longer 0.
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*/
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#define THERMAL_THRESHOLD_DISABLE_ALL 0
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enum thermal_threshold {
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THRESHOLD_WARNING = 0, /* Issue overheating warning */
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THRESHOLD_CPU_DOWN, /* Shut down CPU */
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THRESHOLD_POWER_DOWN, /* Shut down everything we can */
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THRESHOLD_COUNT
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};
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/* Configuration for temperature sensor */
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struct thermal_config_t {
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/* Configuration flags */
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int8_t config_flags;
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/* Threshold temperatures in K */
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int16_t thresholds[THRESHOLD_COUNT + THERMAL_FAN_STEPS];
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};
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/**
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* Set a threshold temperature.
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*
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* @param type Sensor type to set threshold for
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* @param threshold_id Threshold ID to set
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* @param value New threshold temperature in K, or
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* THERMAL_THRESHOLD_DISABLE to disable this threshold.
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*
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* @return EC_SUCCESS if success, non-zero if error.
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*/
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int thermal_set_threshold(enum temp_sensor_type type, int threshold_id,
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int value);
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/**
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* Read a threshold temperature.
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*
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* @param type Sensor type to get threshold for
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* @param threshold_id Threshold ID
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*
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* @return The threshold temperature in K, THERMAL_THRESHOLD_DISABLE if
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* disabled, -1 if error.
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*/
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int thermal_get_threshold(enum temp_sensor_type type, int threshold_id);
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/**
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* Enable/disable automatic fan speed control
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*
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* @param enable Enable (!=0) or disable (0) auto fan control
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*/
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void thermal_control_fan(int enable);
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#endif /* __CROS_EC_THERMAL_H */
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