From: Atsushi Nemoto <anemo-7JcRY8pycbNHfZP73Gtkiw@public.gmane.org>
To: david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org
Cc: sshtylyov-hkdhdckH98+B+jHODAdFcQ@public.gmane.org,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
mlachwani-Igf4POYTYCDQT0dZR+AlfA@public.gmane.org,
ralf-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org,
linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org
Subject: Re: [PATCH] TXx9 SPI controller driver
Date: Mon, 25 Jun 2007 00:56:00 +0900 (JST) [thread overview]
Message-ID: <20070625.005600.07644920.anemo@mba.ocn.ne.jp> (raw)
In-Reply-To: <200706230909.52037.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
On Sat, 23 Jun 2007 09:09:51 -0700, David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org> wrote:
> > And for mmiowb() issue, I put it just only I was not sure whether
> > gpio_set_value() guarantee I/O barrier. Now I see i2c-gpio.c, etc. do
> > not have such barriers. I will remove these barriers and fix platform
> > gpio codes.
>
> I don't think this is a case where there'd be a benefit to
> allowing non-barriered implementations, and thus requiring
> all portable code to include platform-neutral I/O barriers.
> I don't know that such neutral primitives actually exist...
>
> I'll update the GPIO docs to make that clear, unless you
> have some strong argument to the contrary.
No contrary argument. Some guide to writers of GPIO implementations
about the I/O barriers should be appreciated.
---
Atsushi Nemoto
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next prev parent reply other threads:[~2007-06-24 15:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070622.232111.36926005.anemo@mba.ocn.ne.jp>
[not found] ` <20070622.232111.36926005.anemo-7JcRY8pycbNHfZP73Gtkiw@public.gmane.org>
2007-06-22 18:03 ` [PATCH] TXx9 SPI controller driver David Brownell
[not found] ` <200706221103.19761.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-06-22 18:51 ` David Brownell
[not found] ` <200706221151.24959.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-06-23 15:41 ` Atsushi Nemoto
2007-06-23 16:09 ` [spi-devel-general] " David Brownell
[not found] ` <200706230909.52037.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-06-24 15:56 ` Atsushi Nemoto [this message]
2007-06-24 16:15 ` Atsushi Nemoto
2007-06-25 16:12 ` Atsushi Nemoto
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