Re: [PATCH 5/6] gnss: motmdm: Add support for Motorola Mapphone MDM6600 modem

On Thu 2020-04-30 10:46:14, Tony Lindgren wrote:

Motorola is using a custom TS 27.010 based serial port line discipline
for various devices on the modem. These devices can be accessed on
dedicated channels using Linux kernel serdev-ngsm driver.

For the GNSS on these devices, we need to kick the GNSS device at a
desired rate. Otherwise the GNSS device stops sending data after a
few minutes. The rate we poll data defaults to 1000 ms, and can be
specified with a module option rate_ms between 1 to 16 seconds.

Note that AGPS with xtra2.bin is not yet supported, so getting a fix
can take quite a while. And a recent gpsd is needed to parse the
$GNGNS output, and to properly handle the /dev/gnss0 character device.
I've confirmed it works properly with gpsd-3.20.

Signed-off-by: Tony Lindgren <tony@atomide.com>

Reviewed-by: Pavel Machek <redacted>

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