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, 24 May 2007 11:12:46 -0400
From:	"Mike Frysinger" <vapier.adi@...il.com>
To:	"Paul Mundt" <lethal@...ux-sh.org>,
	"Mike Frysinger" <vapier.adi@...il.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Bryan Wu" <Bryan.Wu@...log.com>
Subject: Re: how to allow board writers to customize driver behavior (watchdog here)

On 5/24/07, Paul Mundt <lethal@...ux-sh.org> wrote:
> On Thu, May 24, 2007 at 12:21:47AM -0400, Mike Frysinger wrote:
> > is this completely bad mojo ?  is there some other mechanism that
> > provides what i want and i just dont know about it ?  or do i just
> > make people change the driver to fit their application, thus throwing
> > out the idea of keeping all board-specific details in just the boards
> > file ...
>
> It sounds like your constraining your driver based on terminology.
> Watchdogs on most embedded platforms support either a 'reset' mode or
> otherwise act as periodic timers, trying to push both of these
> functionalities in to a watchdog driver is rather pointless.
> CONFIG_WATCHDOG implies 'reset' mode by definition.

my constraint was trying to keep all of the code that deals with the
watchdog in one file ... those were the blinders i had on from the get
go so the idea of having different drivers that work with the watchdog
hardware hadnt even occurred to me

> If you wish to use your watchdog timer as a periodic timer, simply have a
> clocksource/clockevents established for it, leave the watchdog driver as
> a reset-only thing, and let the user decide which one they want either
> via Kconfig or the kernel command line. (The watchdog driver can just
> -ENODEV or -EBUSY if the clocksource is active).

hmm, i'll poke the clocksource/clockevents stuff as well as the
notifier idea from Alan

thanks
-mike
-
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/

Powered by blists - more mailing lists