linux/drivers/gnss/Kconfig

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# SPDX-License-Identifier: GPL-2.0-only
gnss: add GNSS receiver subsystem Add a new subsystem for GNSS (e.g. GPS) receivers. While GNSS receivers are typically accessed using a UART interface they often also support other I/O interfaces such as I2C, SPI and USB, while yet other devices use iomem or even some form of remote-processor messaging (rpmsg). The new GNSS subsystem abstracts the underlying interface and provides a new "gnss" class type, which exposes a character-device interface (e.g. /dev/gnss0) to user space. This allows GNSS receivers to have a representation in the Linux device model, something which is important not least for power management purposes. Note that the character-device interface provides raw access to whatever protocol the receiver is (currently) using, such as NMEA 0183, UBX or SiRF Binary. These protocols are expected to be continued to be handled by user space for the time being, even if some hybrid solutions are also conceivable (e.g. to have kernel drivers issue management commands). This will still allow for better platform integration by allowing GNSS devices and their resources (e.g. regulators and enable-gpios) to be described by firmware and managed by kernel drivers rather than platform-specific scripts and services. While the current interface is kept minimal, it could be extended using IOCTLs, sysfs or uevents as needs and proper abstraction levels are identified and determined (e.g. for device and feature identification). Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-06-01 08:22:52 +00:00
#
# GNSS receiver configuration
#
menuconfig GNSS
tristate "GNSS receiver support"
---help---
Say Y here if you have a GNSS receiver (e.g. a GPS receiver).
To compile this driver as a module, choose M here: the module will
be called gnss.
if GNSS
config GNSS_SERIAL
tristate
config GNSS_MTK_SERIAL
tristate "Mediatek GNSS receiver support"
depends on SERIAL_DEV_BUS
select GNSS_SERIAL
help
Say Y here if you have a Mediatek-based GNSS receiver which uses a
serial interface.
To compile this driver as a module, choose M here: the module will
be called gnss-mtk.
If unsure, say N.
config GNSS_SIRF_SERIAL
tristate "SiRFstar GNSS receiver support"
depends on SERIAL_DEV_BUS
---help---
Say Y here if you have a SiRFstar-based GNSS receiver which uses a
serial interface.
To compile this driver as a module, choose M here: the module will
be called gnss-sirf.
If unsure, say N.
config GNSS_UBX_SERIAL
tristate "u-blox GNSS receiver support"
depends on SERIAL_DEV_BUS
select GNSS_SERIAL
---help---
Say Y here if you have a u-blox GNSS receiver which uses a serial
interface.
To compile this driver as a module, choose M here: the module will
be called gnss-ubx.
If unsure, say N.
endif # GNSS