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/* Copyright 2013-2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __SENSOR_H
#define __SENSOR_H
/*
* A sensor handler is a four bytes value which identifies a sensor by
* its resource class (temperature, fans ...), a resource identifier
* and an attribute number (data, status, ...) :
*
* Res.
* | Attr. | Class | Resource Id |
* |--------|--------|----------------|
*
*
* Helper routines to build or use the sensor handler.
*/
#define sensor_make_handler(sensor_class, sensor_rid, sensor_attr) \
(((sensor_attr) << 24) | ((sensor_class) & 0xff) << 16 | \
((sensor_rid) & 0xffff))
#define sensor_get_frc(handler) (((handler) >> 16) & 0xff)
#define sensor_get_rid(handler) ((handler) & 0xffff)
#define sensor_get_attr(handler) ((handler) >> 24)
/*
* Sensor families
*
* This identifier is used to dispatch calls to OPAL_SENSOR_READ to
* the appropriate component. FSP is the initial family.
*/
#define SENSOR_FSP 0x0
#define SENSOR_DTS 0x80
#define sensor_is_dts(handler) (sensor_get_frc(handler) & SENSOR_DTS)
/*
* root node of all sensors : /ibm,opal/sensors
*/
extern struct dt_node *sensor_node;
extern void sensor_init(void);
#endif /* __SENSOR_H */
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