linux-kernel - Re: [PATCH] ATA: pata

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Message-ID: <4dba6f46587df2.89235609@wp.pl>
Date:	Fri, 29 Apr 2011 09:56:54 +0200
From:	Stanisław Gruszka <stf_xl@...pl>
To:	Stanislaw Gruszka <stf_xl@...pl>
Cc:	Igor Plyatov <plyatov@...il.com>, Jeff Garzik <jgarzik@...ox.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ATA: pata_at91.c bugfixes

> > * The NCS_RD_CYCLE is equal to the NRD_CYCLE for AT91SAM9, because they
> >   start/finish simultaneously (HW related).
> No, NCS and NRD are different signals, waveforms are different (if 
> configured differently in SMC controller).
Your sentence is true. NRD and NCS cycle time must be the same (otherwise
SMC behaviour is undefined), hence both signals start/finish simultaneously.
Anyway waveforms (setup, and pulse time) can be different. All of thise
are kinda obvious, no? :-)

Stanislaw


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