linux-kernel - Re: Grafting old platform drivers onto a new DT kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 5 Nov 2015 16:15:59 +0100
From:	Andrew Lunn <andrew@...n.ch>
To:	Mason <slash.tmp@...e.fr>
Cc:	Linux ARM <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Grafting old platform drivers onto a new DT kernel

> Since I don't have time to rewrite the drivers at the moment, I'm wondering
> if it's possible to "graft" old drivers (they're using the platform API, no
> trace of DT support) onto my small base?

Platform drivers are still usable with DT systems. We used that fact
when converting platform based machines over to DT, one driver at a
time. Look in the git history for kirkwood devices. e.g. somewhere
around v3.7, arch/arm/mach-kirkwood. board-dt.c, and the various
board-*.c files, and the DT files in the usual place.

> Is that a realistic plan? What traps am I likely to fall into?

It is not just the move to DT where things are different. Kernel APIs
are not stable. So your old drivers might not even compile with a
current kernel.

	Andrew
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/