OpenCloudOS-Kernel/drivers/gnss/Kconfig

#
# 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

endif # GNSS
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 16:22:52 +08:00			`#`
			`# 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.`
gnss: add generic serial driver 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> 2018-06-01 16:22:54 +08:00
			`if GNSS`

			`config GNSS_SERIAL`
			`tristate`

			`endif # GNSS`