From: Baruch Siach <baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org>
To: dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: [PATCH] spi: fix m25p80 when the cs_change hint is honored
Date: Wed, 20 May 2009 08:25:47 +0300 [thread overview]
Message-ID: <20090520052547.GE28870@tarshish> (raw)
In-Reply-To: <200905192209.19125.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
Hi David,
On Tue, May 19, 2009 at 10:09:19PM -0700, David Brownell wrote:
> On Tuesday 19 May 2009, Baruch Siach wrote:
> > If so would a clarification of the relevant text at
> > include/linux/spi/spi.h be accepted?
>
> In what way is the existing language unclear? There are
> two paragraphs in the "struct spi_transfer" kerneldoc.
I (wrongly) understood the name cs_change as saying "chip select change", that
is, "deactivate the chip select". Then I read the following text from
include/linux/spi/spi.h:
"(ii) When the transfer is the last one in the message, the chip may stay
selected until the next transfer."
I (wrongly again) understood that this description applies to that case of
cs_change == 0. I'd rephrase the above sentence as follows:
"(ii) When the transfer is the last one in the message, and cs_change !=
0, the chip may stay selected until the next transfer."
Does this make sense?
baruch
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prev parent reply other threads:[~2009-05-20 5:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-19 11:09 [PATCH] spi: fix m25p80 when the cs_change hint is honored Baruch Siach
[not found] ` <1242731340-12160-1-git-send-email-baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org>
2009-05-20 4:34 ` David Brownell
[not found] ` <200905192134.14316.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2009-05-20 4:55 ` Baruch Siach
2009-05-20 5:09 ` David Brownell
[not found] ` <200905192209.19125.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2009-05-20 5:25 ` Baruch Siach [this message]
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