1. 07 Jul, 2018 6 commits
  2. 06 Jul, 2018 3 commits
  3. 03 Jul, 2018 28 commits
  4. 28 Jun, 2018 3 commits
    • Johan Hovold's avatar
      gnss: add receiver type support · 10f14663
      Johan Hovold authored
      Add a "type" device attribute and a "GNSS_TYPE" uevent variable which
      can be used to determine the type of a GNSS receiver. The currently
      identified types reflect the protocol(s) supported by a receiver:
      
      	"NMEA"	NMEA 0183
      	"SiRF"	SiRF Binary
      	"UBX"	UBX
      
      Note that both SiRF and UBX type receivers typically support a subset of
      NMEA 0183 with vendor extensions (e.g. to allow switching to the vendor
      protocol).
      Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      10f14663
    • Johan Hovold's avatar
      gnss: add driver for sirfstar-based receivers · d2efbbd1
      Johan Hovold authored
      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: default avatarJohan Hovold <johan@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d2efbbd1
    • Johan Hovold's avatar
      dt-bindings: gnss: add sirfstar binding · 176193b7
      Johan Hovold authored
      Add binding for SiRFstar-based GNSS receivers.
      
      Note that while four compatible-strings are initially added representing
      devices which differ in which I/O interfaces they support, they
      otherwise essentially share the same feature set.
      
      Pin and supply names vary slightly, as do some recommended timings.
      
      Note that the wakeup gpio is not intended to be used as a wakeup source,
      but rather to detect the current power state of the device (active or
      hibernate).
      Reviewed-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      176193b7