From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] serial: DCC(JTAG) serial and console emulation support
Date: Fri, 8 Oct 2010 13:32:22 -0700 [thread overview]
Message-ID: <20101008203221.GM7558@atomide.com> (raw)
In-Reply-To: <alpine.LFD.2.00.1010072121530.3107@xanadu.home>
* Nicolas Pitre <nico@fluxnic.net> [101007 18:16]:
> On Thu, 7 Oct 2010, Tony Lindgren wrote:
> >
> > Can you please pass the read and write functions to the driver
> > in platform_data? We are already booting kernels with both
> > ARMv6 and 7 compiled in.
>
> No. This has nothing to do with platform as this can be determined
> within the driver itself. Would be much better to simply determine
> which flavor to use at driver init time and assign two function pointers.
In the long run some platform init code is needed for powering
up the JTAG interface and take care of pin multiplexing etc.
Also, isn't DCC (Debug Communications Channel) a JTAG standard? At least
the following does not say anything about DCC being ARM specific:
http://en.wikipedia.org/wiki/Joint_Test_Action_Group
BTW, we already have ETM (Embedded Trace Module) in arch/arm/kernel/etm.c.
That is set up as amba driver.
Regards,
Tony
next prev parent reply other threads:[~2010-10-08 20:32 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-05 19:07 [PATCH] serial: DCC(JTAG) serial and console emulation support Daniel Walker
2010-10-06 2:55 ` Nicolas Pitre
2010-10-06 13:48 ` Daniel Walker
2010-10-06 14:22 ` Nicolas Pitre
2010-10-06 14:49 ` Daniel Walker
2010-10-06 15:21 ` Nicolas Pitre
2010-10-06 15:33 ` Daniel Walker
2010-10-06 15:47 ` Nicolas Pitre
2010-10-06 15:54 ` Daniel Walker
2010-10-06 16:22 ` Nicolas Pitre
2010-10-06 16:40 ` Daniel Walker
2010-10-06 17:02 ` Nicolas Pitre
2010-10-06 17:07 ` Daniel Walker
2010-10-07 21:27 ` Tony Lindgren
2010-10-07 21:58 ` Daniel Walker
2010-10-08 1:28 ` Nicolas Pitre
2010-10-08 20:35 ` Tony Lindgren
2010-10-08 20:59 ` Tony Lindgren
2010-10-08 21:27 ` Nicolas Pitre
2010-10-08 20:36 ` Tony Lindgren
2010-10-08 1:25 ` Nicolas Pitre
2010-10-08 20:32 ` Tony Lindgren [this message]
2010-10-08 20:58 ` Tony Lindgren
2010-10-08 21:28 ` Nicolas Pitre
2010-10-08 21:25 ` Nicolas Pitre
2010-10-08 21:49 ` Tony Lindgren
2010-10-09 0:57 ` Nicolas Pitre
2010-10-13 15:21 ` Arnd Bergmann
2010-10-13 16:17 ` Daniel Walker
2010-10-13 17:44 ` Arnd Bergmann
2010-10-13 18:08 ` Daniel Walker
2010-10-13 19:45 ` Arnd Bergmann
2010-10-13 19:52 ` Daniel Walker
2010-10-13 20:10 ` Arnd Bergmann
2010-10-13 20:24 ` Daniel Walker
2010-10-13 20:44 ` Nicolas Pitre
2010-10-13 20:49 ` Daniel Walker
2010-10-13 22:51 ` Nicolas Pitre
2010-10-13 23:26 ` Russell King - ARM Linux
2010-10-13 23:41 ` Nicolas Pitre
2010-10-13 19:55 ` Nicolas Pitre
2010-10-13 20:00 ` Daniel Walker
2010-10-13 20:27 ` Nicolas Pitre
2010-10-13 20:47 ` Daniel Walker
2010-10-13 22:05 ` Daniel Walker
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