linux-kernel - Re: [PATCH v3 05/11] memory: add Atmel EBI (External Bus Interface) driver

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Message-ID: <19172687.eVxczUuuhC@ws-stein>
Date:	Mon, 01 Dec 2014 11:40:03 +0100
From:	Alexander Stein <alexander.stein@...tec-electronic.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Andrew Victor <linux@...im.org.za>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Subject: Re: [PATCH v3 05/11] memory: add Atmel EBI (External Bus Interface) driver

Hi Boris,

On Monday 01 December 2014 11:27:21, Boris Brezillon wrote:
> The EBI (External Bus Interface) is used to access external peripherals
> (NOR, SRAM, NAND, and other specific devices like ethernet controllers).
> Each device is assigned a CS line and an address range and can have its
> own configuration (timings, access mode, bus width, ...).
> This driver provides a generic DT binding to configure a device according
> to its requirements.
> For specific device controllers (like the NAND one) the SMC timings
> should be configured by the controller driver through the matrix and
> smc syscon regmaps.
> 
> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> ---
>  drivers/memory/Kconfig     |  11 +
>  drivers/memory/Makefile    |   1 +
>  drivers/memory/atmel-ebi.c | 627 +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 639 insertions(+)
>  create mode 100644 drivers/memory/atmel-ebi.c

While I like this feature, shouldn't this driver go to drivers/bus/ like the imx-weim driver? The latter one does the same, so I wonder why one is in drivers/bus while the other is in drivers/memory.

Best regards,
Alexander
-- 
Dipl.-Inf. Alexander Stein

SYS TEC electronic GmbH
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08468 Heinsdorfergrund
Tel.: 03765 38600-1156
Fax: 03765 38600-4100
Email: alexander.stein@...tec-electronic.com
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