From d2efbbd18b1e26ac79401841089e4a4b97d745c3 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 1 Jun 2018 10:22:58 +0200 Subject: gnss: add driver for sirfstar-based receivers Add driver for serial-connected SiRFstar-based GNSS receivers. These devices typically boot into hibernate mode from which they can be woken using a pulse on the ON_OFF input pin. Once active, a pulse on the same ON_OFF pin is used to put the device back into hibernate mode. The current state can be determined by sampling the WAKEUP output. Hardware configurations where WAKEUP has been connected to ON_OFF (and where an initial WAKEUP pulse during boot is sufficient to have the device boot into active mode) are also supported. In this case, device power is managed using the main-supply regulator only. Note that configurations where WAKEUP is left not connected, so that the device power state can only indirectly be determined using the I/O interface, is currently not supported. It should be fairly straight-forward to extend the current implementation with such support however (and this this is the main reason for not using the generic serial implementation for this driver). Note that timepulse-support is left unimplemented. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/gnss/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/gnss/Kconfig') diff --git a/drivers/gnss/Kconfig b/drivers/gnss/Kconfig index 784b8c0367d9..6abc88514512 100644 --- a/drivers/gnss/Kconfig +++ b/drivers/gnss/Kconfig @@ -15,6 +15,18 @@ if GNSS config GNSS_SERIAL tristate +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 -- cgit v1.2.3