linux/drivers/gnss, branch v5.1

gnss: add driver for mediatek receivers

2019-02-15T15:54:38Z

Add driver for serial-connected Mediatek-based GNSS receivers. These devices typically boot transmitting vendor specific NMEA output sequences. The serial port bit rate is read from the device tree "current-speed". Note that the driver uses the generic GNSS serial implementation and therefore essentially only manages power abstracted into three power states: ACTIVE, STANDBY, and OFF. For mediatek receivers with a main supply and no enable-gpios, this simply means that the main supply is disabled in STANDBY and OFF (the optional backup supply is kept enabled while the driver is bound). Note that the timepulse-support is left unimplemented. Signed-off-by: Loys Ollivier [ johan: rename backup supply ] Signed-off-by: Johan Hovold

gnss: add mtk receiver type support

2019-02-15T15:54:38Z

Add an MTK (Mediatek) type to the "GNSS_TYPE" attribute. Note that MTK receivers support a subset of NMEA 0183 with vendor extensions. Signed-off-by: Loys Ollivier Signed-off-by: Johan Hovold

gnss: sirf: add a separate supply for a lna

2019-01-25T11:07:42Z

Devices might have a separate lna between antenna input of the gps chip and the antenna which might have a separate supply. Signed-off-by: Andreas Kemnade Signed-off-by: Johan Hovold

gnss: sirf: add support for configurations without wakeup signal

2019-01-25T11:07:42Z

Some Wi2Wi devices do not have a wakeup output, so device state can only be indirectly detected by looking whether there is communication over the serial lines. This approach requires a report cycle set to a value less than 2 seconds to be reliable. Signed-off-by: Andreas Kemnade [ johan: simplify sirf_set_active(), style changes ] Signed-off-by: Johan Hovold

gnss: sirf: write data to gnss only when the gnss device is open

2019-01-25T10:35:06Z

The api forbids writing data there otherwise. Prepare for the serdev_open()/close() being a part of sirf_set_active. Signed-off-by: Andreas Kemnade Signed-off-by: Johan Hovold

gnss: sirf: drop redundant double negation

2019-01-25T09:58:56Z

The active flag is of type bool so drop the redundant double negation when storing the gpio state. Signed-off-by: Johan Hovold

gnss: sirf: force hibernate mode on probe

2019-01-25T09:58:54Z

Make sure to put the receiver in hibernate mode in case it is already active during probe in order to avoid wasting power until first open or suspend. This can happen, for example, after a reset or non-clean shutdown, and possibly also due to glitches during power-on. Reported-by: Andreas Kemnade Signed-off-by: Johan Hovold

gnss: sirf: fix premature wakeup interrupt enable

2019-01-25T09:58:52Z

Make sure the receiver is powered (and booted) before enabling the wakeup interrupt to avoid spurious interrupts due to a floating input. Similarly, disable the interrupt before powering off on probe errors and on unbind. Fixes: d2efbbd18b1e ("gnss: add driver for sirfstar-based receivers") Cc: stable # 4.19 Signed-off-by: Johan Hovold

Merge 4.20-rc6 into tty-next

2018-12-10T09:17:45Z

We want the TTY changes in here as well. Signed-off-by: Greg Kroah-Hartman

gnss: sirf: fix activation retry handling

2018-12-06T16:22:23Z

Fix activation helper which would return -ETIMEDOUT even if the last retry attempt was successful. Also change the semantics of the retries variable so that it actually holds the number of retries (rather than tries). Fixes: d2efbbd18b1e ("gnss: add driver for sirfstar-based receivers") Cc: stable # 4.19 Signed-off-by: Johan Hovold