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. -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html