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// SPDX-License-Identifier: Apache-2.0
/* Copyright 2013-2017 IBM Corp. */
#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. |Fam Class| Resource Id |
* |--------|---|-----|----------------|
*
* The last 3bits of the resource class are used to hold the family
* number. That leaves 32 differents resource classes. This is enough
* for the FSP as it uses 15.
*/
/*
* Helper routines to build or use the sensor handler.
*/
#define sensor_make_handler(family, class, rid, attr) \
(((attr) << 24) | ((family) & 0x7) << 21 | ((class) & 0x1f) << 16 | \
((rid) & 0xffff))
#define sensor_get_family(handler) (((handler) >> 21) & 0x7)
#define sensor_get_frc(handler) (((handler) >> 16) & 0x1f)
#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 and you can
* have up to eight, as we are hijacking the last 3bits of the
* resource class.
*/
enum {
SENSOR_FSP = 0,
SENSOR_OCC = 6,
SENSOR_DTS = 7,
};
/*
* root node of all sensors : /ibm,opal/sensors
*/
extern struct dt_node *sensor_node;
extern void sensor_init(void);
extern void check_sensor_read(int token);
#endif /* __SENSOR_H */
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