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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 */
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/*
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* Generic serial GNSS receiver driver
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*
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* Copyright (C) 2018 Johan Hovold <johan@kernel.org>
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*/
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#ifndef _LINUX_GNSS_SERIAL_H
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#define _LINUX_GNSS_SERIAL_H
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#include <asm/termbits.h>
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#include <linux/pm.h>
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struct gnss_serial {
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struct serdev_device *serdev;
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struct gnss_device *gdev;
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speed_t speed;
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const struct gnss_serial_ops *ops;
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unsigned long drvdata[0];
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};
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enum gnss_serial_pm_state {
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GNSS_SERIAL_OFF,
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GNSS_SERIAL_ACTIVE,
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GNSS_SERIAL_STANDBY,
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};
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struct gnss_serial_ops {
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int (*set_power)(struct gnss_serial *gserial,
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enum gnss_serial_pm_state state);
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};
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extern const struct dev_pm_ops gnss_serial_pm_ops;
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struct gnss_serial *gnss_serial_allocate(struct serdev_device *gserial,
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size_t data_size);
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void gnss_serial_free(struct gnss_serial *gserial);
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int gnss_serial_register(struct gnss_serial *gserial);
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void gnss_serial_deregister(struct gnss_serial *gserial);
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static inline void *gnss_serial_get_drvdata(struct gnss_serial *gserial)
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{
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return gserial->drvdata;
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}
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#endif /* _LINUX_GNSS_SERIAL_H */
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