linux-kernel - Re: [PATCH 6/8] gpio-tz1090: add TZ1090 gpio driver

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]

Message-ID: <51837EC3.30705@imgtec.com>
Date:	Fri, 3 May 2013 10:09:23 +0100
From:	James Hogan <james.hogan@...tec.com>
To:	Linus Walleij <linus.walleij@...aro.org>
CC:	"arm@...nel.org" <arm@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	Rob Landley <rob@...dley.net>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH 6/8] gpio-tz1090: add TZ1090 gpio driver

Hi Linus,

On 03/05/13 09:49, Linus Walleij wrote:
> On Fri, Apr 26, 2013 at 11:22 AM, James Hogan <james.hogan@...tec.com> wrote:
>> So basically a bunch of global registers (e.g. pinctrl and gpio) are
>> shared between all 3 cores (up to 4 OSes). The __global_lock2 should do
>> all that is required to ensure exclusive access to the register (as long
>> as the other OSes do something similar when they access the same
>> registers). This is one of the reasons why there are 3 gpio banks with
>> separate interrupts, and each bank's interrupt is optional in this driver.
> 
> OK I get it ...
> 
> I think this platform will never ever work with single zImage
> though, that seems very unlikely given these constraints.
> 
> Well you will have to fight this out with the ARM SoC maintainers
> anyway. If they are OK with it I will live with it.
> 
> (CC ARM SoC for this.)

Sorry, I wasn't very clear. This driver runs on a Meta core (i.e.
arch/metag) not an ARM core, and <asm/global_lock.h> is an architecture
thing (LOCK{0,1,2} are instructions).

Cheers
James

--
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/