Re: Motorola motmdm support

[Denis Kenzior <denkenz@gmail.com>]

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Hi Pavel,

On 12/29/2018 03:49 AM, Pavel Machek wrote:
> Hi!
> 
> Motorola phones use "interesting" setup.
> 
> There's qmi and "normal" (but very buggy) AT interface on
> them. Unfortunately that uses USB and uses too much power (which is a
> problem on phone).
> 
> Plus there's /dev/motmdm1, motmdm3 and motmdm9, multiplexed over
> serial line.

Kernel 27.010 multiplexer or something else entirely?

> 
> It uses subset of AT commands (good) with slightly modified
> protocol... it says ":OK" instead of "OK" and puts ~ before
> unsolicited messages.

Funny

> 
> Other major difference is that commands need to be sent to the right
> device. It seems motmdm1 is for status and call control, and motmdm9
> is for incoming sms.
> 
> I guess that right way to do this is to introduce
> drivers/motorolamodem (or can we just have drivers/motorola?).
> 

For some weird historic reason we called the atom drivers and thus the 
subdirectory housing the relevant sources with the 'modem' suffix.  So I 
guess we should stick to that just to be consistent.

We can have a separate discussion on whether it makes sense to drop the 
'modem' suffix and what the implications are (probably none).  If we 
decide to drop the suffix, then we should/will do it for all drivers.

Regards,
-Denis