linux-kernel - Re: [RFC 0/7] Capebus; a bus for SoCs using simple expansion connectors

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:	Wed, 31 Oct 2012 14:56:20 -0700
From:	Russ Dill <Russ.Dill@...com>
To:	Pantelis Antoniou <panto@...oniou-consulting.com>
Cc:	Tony Lindgren <tony@...mide.com>,
	linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Koen Kooi <koen@...inion.thruhere.net>,
	Matt Porter <mporter@...com>, linux-omap@...r.kernel.org
Subject: Re: [RFC 0/7] Capebus; a bus for SoCs using simple expansion connectors

On Wed, Oct 31, 2012 at 9:52 AM, Pantelis Antoniou
<panto@...oniou-consulting.com> wrote:
> Capebus is created to address the problem of many SoCs that can provide a
> multitude of hardware interfaces but in order to keep costs down the main
> boards only support a limited number of them. The rest are typically brought
> out to pin connectors on to which other boards, named capes are connected and
> allow those peripherals to be used.
>
> These capes connect to the SoC interfaces but might also contain various other
> parts that may need some kind of driver to work.
>
> Since SoCs have limited pins and pin muxing options, not all capes can work
> together so some kind of resource tracking (at least for the pins in use) is
> required.
>
> Before capebus all of this took place in the board support file, and frankly
> for boards with too many capes it was becoming unmanageable.
>
> Capebus provides a virtual bus, which along with a board specific controller,
> cape drivers can be written using the standard Linux device model.
>
> The core capebus infrastructure is not depended on any specific board.
> However capebus needs a board controller to provide services to the cape devices
> it controls. Services like addressing and resource reservation are provided
> by the board controller.
>
> Capebus at the moment only support TI's Beaglebone platform.
>
> This RFC introduces the core concept; most supporting patches
> have been posted to the relevant places.

There are quite a few TODOs in the code, any chance you could
summarize them in the next header email?
--
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/