On Tue, May 12, 2015 at 05:26:34PM +0800, Xing Zheng wrote:

From: zhengxing zhengxing@rock-chips.com

In most cases, we maybe use simple-card as generic machine driver on next kernel, but there are some issue that jack detection and widgets extandable on simple-card.

Own machine drvier can select one valid codec from supported codecs, and add needful function from dts on rockchip platform.

Is it not possible to extend simple card to handle your use cases? Given the very generic naming and the fact that things like jack detection and so on should depend on the CODEC and board usually rather than on the SoC it doesn't sound like this is Rockchip specific.

This also looks like you're reimplementing some device model enumeration stuff which probably shouldn't be happening but let's understand the problem you're trying to solve here before going too far into the code.