linux-kernel - Re: [PATCH 1/4] drivers: create a pinmux subsystem

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:	Sat, 7 May 2011 22:10:56 +0300
From:	Mike Rapoport <mike.rapoport@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Linus Walleij <linus.walleij@...ricsson.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Lee Jones <lee.jones@...aro.org>,
	Martin Persson <martin.persson@...ricsson.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 1/4] drivers: create a pinmux subsystem

On Wed, May 4, 2011 at 12:16 PM, Tony Lindgren <tony@...mide.com> wrote:
> * Linus Walleij <linus.walleij@...ricsson.com> [110502 12:13]:
>
> Good to see this, looks like this should work for omaps too.
>
> The numbering solves the issue where we have multiple
> pinmux domains (base + offset for each domain).
>
> Then I would assume that for most cases the pin access can be
> described with:
>
> unsigned long pinmux_base;      /* Can have multiple pinux domains */
> u16 pinmux_reg_offset;          /* Register offset from pinmux_base */
> u16 flags;                      /* Register width etc */
>
> Which can be accessed with read[bwl] and write[bwl], so we
> can have default access functions in the pinux framework and
> don't necessarily have to implement them for each platform.

On some platforms setting the pin configuration won't require to keep
that lot of data, see, e.g. Orion and it's successors.

> Does this work for you? If so, then we can have the data in the
> same format for all the architectures for devicetree.
>
> And then we can have pin_get and pin_set functions, so platforms
> can implement their custom flags like wake-up trigger etc with
> just read[bwl] and write[bwl].
>
> Also noticed one typo:
>
>> +/* Plobal array of descriptors, one for each physical pin */
>> +static DEFINE_SPINLOCK(pin_desc_lock);
>> +static struct pin_desc pin_desc[MACH_NR_PINS];
>
> s/Plobal/Global/
>
> Regards,
>
> Tony
>
> --
> 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/
>



-- 
    Sincerely Yours,
        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/