mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
37768b054f
Add a generic serial GNSS driver (library) which provides a common implementation for the gnss interface and power management (runtime and system suspend). This allows GNSS drivers for specific chip to be implemented by simply providing a set_power() callback to handle three states: ACTIVE, STANDBY and OFF. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Generic serial GNSS receiver driver
|
|
*
|
|
* Copyright (C) 2018 Johan Hovold <johan@kernel.org>
|
|
*/
|
|
|
|
#ifndef _LINUX_GNSS_SERIAL_H
|
|
#define _LINUX_GNSS_SERIAL_H
|
|
|
|
#include <asm/termbits.h>
|
|
#include <linux/pm.h>
|
|
|
|
struct gnss_serial {
|
|
struct serdev_device *serdev;
|
|
struct gnss_device *gdev;
|
|
speed_t speed;
|
|
const struct gnss_serial_ops *ops;
|
|
unsigned long drvdata[0];
|
|
};
|
|
|
|
enum gnss_serial_pm_state {
|
|
GNSS_SERIAL_OFF,
|
|
GNSS_SERIAL_ACTIVE,
|
|
GNSS_SERIAL_STANDBY,
|
|
};
|
|
|
|
struct gnss_serial_ops {
|
|
int (*set_power)(struct gnss_serial *gserial,
|
|
enum gnss_serial_pm_state state);
|
|
};
|
|
|
|
extern const struct dev_pm_ops gnss_serial_pm_ops;
|
|
|
|
struct gnss_serial *gnss_serial_allocate(struct serdev_device *gserial,
|
|
size_t data_size);
|
|
void gnss_serial_free(struct gnss_serial *gserial);
|
|
|
|
int gnss_serial_register(struct gnss_serial *gserial);
|
|
void gnss_serial_deregister(struct gnss_serial *gserial);
|
|
|
|
static inline void *gnss_serial_get_drvdata(struct gnss_serial *gserial)
|
|
{
|
|
return gserial->drvdata;
|
|
}
|
|
|
|
#endif /* _LINUX_GNSS_SERIAL_H */
|