Add device-tree support to pn544 NFC driver


 * Summary: Add device-tree support to the pn544 NFC driver
 * Proposer: Tim Bird, Sony Mobile
 * Status: Not selected in 2013 to be sponsored by the CE Workgroup

Description
The NXP PN544 NFC chipset is used in a very large number of Linux-based devices. It is missing any integration with device-tree. Such integration would make it easier to use in current products. Some companies are apparently using their own driver for the PN544. It would be worth investigating if the driver in mainline is missing some functionality that prevents its use, and fixing that as well.

This project would consist of adding device-tree awareness to the existing driver, at drivers/nfc/pn544/* This awareness would consist of integrating the driver with the DT-isms for regulators (and/or gpios) and i2c.

Resources

 * Product leaflet

Scope
Rough estimate is 2 to 4 weeks. Maybe quicker with someone familiar with device-tree stuff.

Contractor Candidates
None yet.

Comments
Tim asks: Why isn't NXP maintaining the Linux driver for this?

Reasons for CEWG not selecting this project
Not enough AG members used this chip to be interested in collaborating on the funding of it. (At least, of those attending the meeting). The upstream driver is not compatible with Android, and the out-of-tree driver is not difficult to maintain, with most of the functionality residing in the user-space library. It was decided there was not enough return on investment to justify funding this work.