mirror of https://gitee.com/openkylin/linux.git
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _SCD30_H
|
|
#define _SCD30_H
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/device.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/types.h>
|
|
|
|
struct scd30_state;
|
|
|
|
enum scd30_cmd {
|
|
/* start continuous measurement with pressure compensation */
|
|
CMD_START_MEAS,
|
|
/* stop continuous measurement */
|
|
CMD_STOP_MEAS,
|
|
/* set/get measurement interval */
|
|
CMD_MEAS_INTERVAL,
|
|
/* check whether new measurement is ready */
|
|
CMD_MEAS_READY,
|
|
/* get measurement */
|
|
CMD_READ_MEAS,
|
|
/* turn on/off automatic self calibration */
|
|
CMD_ASC,
|
|
/* set/get forced recalibration value */
|
|
CMD_FRC,
|
|
/* set/get temperature offset */
|
|
CMD_TEMP_OFFSET,
|
|
/* get firmware version */
|
|
CMD_FW_VERSION,
|
|
/* reset sensor */
|
|
CMD_RESET,
|
|
/*
|
|
* Command for altitude compensation was omitted intentionally because
|
|
* the same can be achieved by means of CMD_START_MEAS which takes
|
|
* pressure above the sea level as an argument.
|
|
*/
|
|
};
|
|
|
|
#define SCD30_MEAS_COUNT 3
|
|
|
|
typedef int (*scd30_command_t)(struct scd30_state *state, enum scd30_cmd cmd, u16 arg,
|
|
void *response, int size);
|
|
|
|
struct scd30_state {
|
|
/* serialize access to the device */
|
|
struct mutex lock;
|
|
struct device *dev;
|
|
struct regulator *vdd;
|
|
struct completion meas_ready;
|
|
/*
|
|
* priv pointer is solely for serdev driver private data. We keep it
|
|
* here because driver_data inside dev has been already used for iio and
|
|
* struct serdev_device doesn't have one.
|
|
*/
|
|
void *priv;
|
|
int irq;
|
|
/*
|
|
* no way to retrieve current ambient pressure compensation value from
|
|
* the sensor so keep one around
|
|
*/
|
|
u16 pressure_comp;
|
|
u16 meas_interval;
|
|
int meas[SCD30_MEAS_COUNT];
|
|
|
|
scd30_command_t command;
|
|
};
|
|
|
|
int scd30_suspend(struct device *dev);
|
|
int scd30_resume(struct device *dev);
|
|
|
|
static __maybe_unused SIMPLE_DEV_PM_OPS(scd30_pm_ops, scd30_suspend, scd30_resume);
|
|
|
|
int scd30_probe(struct device *dev, int irq, const char *name, void *priv, scd30_command_t command);
|
|
|
|
#endif
|