1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _SCD30_H
 3#define _SCD30_H
 4
 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 because
37	 * the same can be achieved by means of CMD_START_MEAS which takes
38	 * pressure above the sea level as an argument.
39	 */
40};
41
42#define SCD30_MEAS_COUNT 3
43
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 it
55	 * here because driver_data inside dev has been already used for iio and
56	 * 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 from
62	 * the sensor so keep one around
63	 */
64	u16 pressure_comp;
65	u16 meas_interval;
66	int meas[SCD30_MEAS_COUNT];
67
68	scd30_command_t command;
69};
70
71int scd30_suspend(struct device *dev);
72int scd30_resume(struct device *dev);
73
74static __maybe_unused SIMPLE_DEV_PM_OPS(scd30_pm_ops, scd30_suspend, scd30_resume);
75
76int scd30_probe(struct device *dev, int irq, const char *name, void *priv, scd30_command_t command);
77
78#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _SCD30_H
 3#define _SCD30_H
 4
 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 because
37	 * the same can be achieved by means of CMD_START_MEAS which takes
38	 * pressure above the sea level as an argument.
39	 */
40};
41
42#define SCD30_MEAS_COUNT 3
43
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 it
55	 * here because driver_data inside dev has been already used for iio and
56	 * 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 from
62	 * the sensor so keep one around
63	 */
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#endif