LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Haavard Skinnemoen <hskinnemoen@atmel.com>
To: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: david-b@pacbell.net, spi-devel-general@lists.sourceforge.net,
	linux-kernel@vger.kernel.org
Subject: Re: atmel_spi clock polarity
Date: Mon, 18 Feb 2008 15:31:58 +0100	[thread overview]
Message-ID: <20080218153158.2ff8842a@dhcp-252-066.norway.atmel.com> (raw)
In-Reply-To: <20080218.231243.41197917.anemo@mba.ocn.ne.jp>

On Mon, 18 Feb 2008 23:12:43 +0900 (JST)
Atsushi Nemoto <anemo@mba.ocn.ne.jp> wrote:

> T0-T1 was relatively longer then T1-T2.  I suppose T1 is not the
> point of updating MR register, but the point of starting DMA transfer.

Aw. I see.

> Anyway, I will try your patch in a few days.

Ok, thanks. If it works, that would be great, but given your
description above I'm not sure if I dare hope for it.

Hmm...I suppose we could just use CSR0 for all transfers and not
bother updating MR. That might actually be cheaper than doing it
"the right way"...and allow us to support an arbitrary number of
chipselects instead of just four.

But I guess the AT91RM9200 won't be too happy about that...

Haavard

  reply	other threads:[~2008-02-18 14:32 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-16 13:32 Atsushi Nemoto
2008-02-18 11:42 ` Haavard Skinnemoen
2008-02-18 14:12   ` Atsushi Nemoto
2008-02-18 14:31     ` Haavard Skinnemoen [this message]
2008-02-20  5:21       ` Atsushi Nemoto
2008-02-20  9:34         ` Haavard Skinnemoen
2008-02-20  9:50           ` Atsushi Nemoto
2008-02-21  1:33             ` David Brownell
2008-02-21  1:32           ` David Brownell
2008-02-18 19:57     ` [spi-devel-general] " David Brownell
2008-02-18 22:49       ` Haavard Skinnemoen
2008-02-19 14:51         ` Atsushi Nemoto

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20080218153158.2ff8842a@dhcp-252-066.norway.atmel.com \
    --to=hskinnemoen@atmel.com \
    --cc=anemo@mba.ocn.ne.jp \
    --cc=david-b@pacbell.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=spi-devel-general@lists.sourceforge.net \
    --subject='Re: atmel_spi clock polarity' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).