From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1752642AbdBBSGC (ORCPT <rfc822;w@1wt.eu>);
        Thu, 2 Feb 2017 13:06:02 -0500
Received: from mail-wm0-f65.google.com ([74.125.82.65]:36360 "EHLO
        mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1752186AbdBBSF7 (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 2 Feb 2017 13:05:59 -0500
From: "Giuseppe Lippolis" <giu.lippolis@gmail.com>
To: <linux-kernel@vger.kernel.org>
Subject: adding si3210 driver
Date: Thu, 2 Feb 2017 19:05:55 +0100
Message-ID: <009401d27d7f$00364180$00a2c480$@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain;
        charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Outlook 15.0
Thread-Index: AdJ9ftfQpF2eh5ygSOC8FSK8od5YpQ==
Content-Language: de
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi All,
I have a router running linux (LEDE distribution) with an embedded 3G modem
and a POTS telephone interface.
The telephone interface uses the si3210 device interfaced with the uP
through an spi IF.
The si3210 ProSLIC integrates a subscriber line interface circuit (SLIC) and
is commonly found in several router with telephone functions.

Because I was unable to find a driver for the si3210, I'm now using the
spidev interface to control the device from the userspace. 

Now I'm thinking to add a spi protocol char driver for that device.

My first question is if make sense to do this; I see other similar tentative
never embedded in the mainstream:
https://github.com/stelhs/slic_tdm
https://github.com/opennetworklinux/linux-3.8.13/tree/master/drivers/tdm/lin
e_ctrl

Second question is: What class the driver belong to? (in which drivers/
subfolder shall I add the driver)?

Thanks for the support.
Bye.