gnss: add receiver type support

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: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
index 5fb0f730db48..79cb98950013 100644
--- a/drivers/gnss/sirf.c
+++ b/drivers/gnss/sirf.c
@@ -267,6 +267,7 @@ static int sirf_probe(struct serdev_device *serdev)
         if (!gdev)
                 return -ENOMEM;
 
+        gdev->type = GNSS_TYPE_SIRF;
         gdev->ops = &sirf_gnss_ops;
         gnss_set_drvdata(gdev, data);