[PATCH v3 05/11] memory: add Atmel EBI (External Bus Interface) driver
boris.brezillon at free-electrons.com
Mon Dec 1 02:50:06 PST 2014
On Mon, 01 Dec 2014 11:40:03 +0100
Alexander Stein <alexander.stein at systec-electronic.com> wrote:
> 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 at traphandler.com>
> > Signed-off-by: Boris Brezillon <boris.brezillon at free-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.
I don't have a strong opinion regarding where this driver should
live (I even considered putting it in drivers/bus) :-).
But note that there are other "external memory interface" drivers
in drivers/memory too: TI AEMIF and Marvell DEVBUS ;-).
Does anyone else think this driver should go in drivers/bus ?
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
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