From mboxrd@z Thu Jan  1 00:00:00 1970
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Wed, 21 Nov 2018 12:40:19 +0100
Subject: [U-Boot] SPI NOR controller with direct mapping support
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To: u-boot@lists.denx.de

Hello Jagan,

I have a SoC which has a portion of memory where we can map a SPI NOR
portion to do direct accesses. This is only for reading requests,
otherwise regular SPI transfers must be used.

While there is no real support for spi-mem in spi-flash, what is the
right way to implement a driver for such controller? It is more a SPI
controller driver and should probably inherit from UCLASS_SPI. But
inside the driver, it looks like we must access the spi_flash
structure. Also, we would make use of functions like spi_flash_std_xxx
from drivers/mtd/spi/ while I would definitely put the driver itself in
drivers/spi/. Can you please comment on all these points?


Thanks,
Miqu=C3=A8l