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/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2021 Intel Corporation */
#include <linux/mutex.h>
#include <linux/types.h>
#ifndef __PECI_HWMON_COMMON_H
#define __PECI_HWMON_COMMON_H
#define PECI_HWMON_UPDATE_INTERVAL HZ
/**
* struct peci_sensor_state - PECI state information
* @valid: flag to indicate the sensor value is valid
* @last_updated: time of the last update in jiffies
* @lock: mutex to protect sensor access
*/
struct peci_sensor_state {
bool valid;
unsigned long last_updated;
struct mutex lock; /* protect sensor access */
};
/**
* struct peci_sensor_data - PECI sensor information
* @value: sensor value in milli units
* @state: sensor update state
*/
struct peci_sensor_data {
s32 value;
struct peci_sensor_state state;
};
/**
* peci_sensor_need_update() - check whether sensor update is needed or not
* @sensor: pointer to sensor data struct
*
* Return: true if update is needed, false if not.
*/
static inline bool peci_sensor_need_update(struct peci_sensor_state *state)
{
return !state->valid ||
time_after(jiffies, state->last_updated + PECI_HWMON_UPDATE_INTERVAL);
}
/**
* peci_sensor_mark_updated() - mark the sensor is updated
* @sensor: pointer to sensor data struct
*/
static inline void peci_sensor_mark_updated(struct peci_sensor_state *state)
{
state->valid = true;
state->last_updated = jiffies;
}
#endif /* __PECI_HWMON_COMMON_H */
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