linux-kernel - Re: [PATCH v8 3/4] mtd: spi-nor: introduce Double Transfer Rate (DTR) SPI protocols

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Message-ID: <aaabe07a-fd00-8156-7082-3200238a0d60@gmail.com>
Date:   Tue, 25 Apr 2017 22:26:06 +0200
From:   Marek Vasut <marek.vasut@...il.com>
To:     Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-mtd@...ts.infradead.org
Cc:     computersforpeace@...il.com, dwmw2@...radead.org,
        boris.brezillon@...e-electrons.com, richard@....at,
        linux-kernel@...r.kernel.org,
        Cyrille Pitchen <cyrille.pitchen@...el.com>
Subject: Re: [PATCH v8 3/4] mtd: spi-nor: introduce Double Transfer Rate (DTR)
 SPI protocols

On 04/25/2017 10:08 PM, Cyrille Pitchen wrote:
> From: Cyrille Pitchen <cyrille.pitchen@...el.com>
> 
> This patch introduces support to Double Transfer Rate (DTR) SPI protocols.
> DTR is used only for Fast Read operations.
> 
> According to manufacturer datasheets, whatever the number of I/O lines
> used during instruction (x) and address/mode/dummy (y) clock cycles, DTR
> is used only during data (z) clock cycles of SPI x-y-z protocols.
> 
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>

Reviewed-by: Marek Vasut <marek.vasut@...il.com>

-- 
Best regards,
Marek Vasut