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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _SCD30_H3#define _SCD30_H4 5#include <linux/completion.h>6#include <linux/device.h>7#include <linux/mutex.h>8#include <linux/pm.h>9#include <linux/regulator/consumer.h>10#include <linux/types.h>11 12struct scd30_state;13 14enum scd30_cmd {15 /* start continuous measurement with pressure compensation */16 CMD_START_MEAS,17 /* stop continuous measurement */18 CMD_STOP_MEAS,19 /* set/get measurement interval */20 CMD_MEAS_INTERVAL,21 /* check whether new measurement is ready */22 CMD_MEAS_READY,23 /* get measurement */24 CMD_READ_MEAS,25 /* turn on/off automatic self calibration */26 CMD_ASC,27 /* set/get forced recalibration value */28 CMD_FRC,29 /* set/get temperature offset */30 CMD_TEMP_OFFSET,31 /* get firmware version */32 CMD_FW_VERSION,33 /* reset sensor */34 CMD_RESET,35 /*36 * Command for altitude compensation was omitted intentionally because37 * the same can be achieved by means of CMD_START_MEAS which takes38 * pressure above the sea level as an argument.39 */40};41 42#define SCD30_MEAS_COUNT 343 44typedef int (*scd30_command_t)(struct scd30_state *state, enum scd30_cmd cmd, u16 arg,45 void *response, int size);46 47struct scd30_state {48 /* serialize access to the device */49 struct mutex lock;50 struct device *dev;51 struct regulator *vdd;52 struct completion meas_ready;53 /*54 * priv pointer is solely for serdev driver private data. We keep it55 * here because driver_data inside dev has been already used for iio and56 * struct serdev_device doesn't have one.57 */58 void *priv;59 int irq;60 /*61 * no way to retrieve current ambient pressure compensation value from62 * the sensor so keep one around63 */64 u16 pressure_comp;65 u16 meas_interval;66 int meas[SCD30_MEAS_COUNT];67 68 scd30_command_t command;69};70 71extern const struct dev_pm_ops scd30_pm_ops;72 73int scd30_probe(struct device *dev, int irq, const char *name, void *priv, scd30_command_t command);74 75#endif76